diff options
Diffstat (limited to 'scd/app-p15.c')
| -rw-r--r-- | scd/app-p15.c | 2766 |
1 files changed, 2489 insertions, 277 deletions
diff --git a/scd/app-p15.c b/scd/app-p15.c index af2eed465..7a92da10b 100644 --- a/scd/app-p15.c +++ b/scd/app-p15.c @@ -1,5 +1,5 @@ /* app-p15.c - The pkcs#15 card application. - * Copyright (C) 2004 Free Software Foundation, Inc. + * Copyright (C) 2005 Free Software Foundation, Inc. * * This file is part of GnuPG. * @@ -31,14 +31,232 @@ #include "iso7816.h" #include "app-common.h" #include "tlv.h" +#include "apdu.h" /* fixme: we should move the card detection to a + separate file */ + +/* Types of cards we know and which needs special treatment. */ +typedef enum + { + CARD_TYPE_UNKNOWN, + CARD_TYPE_TCOS, + CARD_TYPE_MICARDO + } card_type_t; + +/* A list card types with ATRs noticed with these cards. */ +static struct +{ + size_t atrlen; + unsigned char *atr; + card_type_t type; +} card_atr_list[] = { + { 19, "\x3B\xBA\x13\x00\x81\x31\x86\x5D\x00\x64\x05\x0A\x02\x01\x31\x80" + "\x90\x00\x8B", + CARD_TYPE_TCOS }, /* SLE44 */ + { 19, "\x3B\xBA\x14\x00\x81\x31\x86\x5D\x00\x64\x05\x14\x02\x02\x31\x80" + "\x90\x00\x91", + CARD_TYPE_TCOS }, /* SLE66S */ + { 19, "\x3B\xBA\x96\x00\x81\x31\x86\x5D\x00\x64\x05\x60\x02\x03\x31\x80" + "\x90\x00\x66", + CARD_TYPE_TCOS }, /* SLE66P */ + { 27, "\x3B\xFF\x94\x00\xFF\x80\xB1\xFE\x45\x1F\x03\x00\x68\xD2\x76\x00" + "\x00\x28\xFF\x05\x1E\x31\x80\x00\x90\x00\x23", + CARD_TYPE_MICARDO }, /* German BMI card */ + { 26, "\x3B\xFE\x94\x00\xFF\x80\xB1\xFA\x45\x1F\x03\x45\x73\x74\x45\x49" + "\x44\x20\x76\x65\x72\x20\x31\x2E\x30\x43", + CARD_TYPE_MICARDO }, /* EstEID (Estonian Big Brother card) */ + { 0 } +}; + + +/* The Pin Types as defined in pkcs#15 v1.1 */ +typedef enum + { + PIN_TYPE_BCD = 0, + PIN_TYPE_ASCII_NUMERIC = 1, + PIN_TYPE_UTF8 = 2, + PIN_TYPE_HALF_NIBBLE_BCD = 3, + PIN_TYPE_ISO9564_1 = 4 + } pin_type_t; + + +/* A bit array with for the key usage flags from the + commonKeyAttributes. */ +struct keyusage_flags_s +{ + unsigned int encrypt: 1; + unsigned int decrypt: 1; + unsigned int sign: 1; + unsigned int sign_recover: 1; + unsigned int wrap: 1; + unsigned int unwrap: 1; + unsigned int verify: 1; + unsigned int verify_recover: 1; + unsigned int derive: 1; + unsigned int non_repudiation: 1; +}; +typedef struct keyusage_flags_s keyusage_flags_t; + + + +/* This is an object to store information about a Certificate + Directory File (CDF) in a format suitable for further processing by + us. To keep memory management, simple we use a linked list of + items; i.e. one such object represents one certificate and the list + the entire CDF. */ +struct cdf_object_s +{ + /* Link to next item when used in a linked list. */ + struct cdf_object_s *next; + + /* Length and allocated buffer with the Id of this object. */ + size_t objidlen; + unsigned char *objid; + + /* To avoid reading a certificate more than once, we cache it in an + allocated memory IMAGE of IMAGELEN. */ + size_t imagelen; + unsigned char *image; + + /* Set to true if a length and offset is available. */ + int have_off; + /* The offset and length of the object. They are only valid if + HAVE_OFF is true and set to 0 if HAVE_OFF is false. */ + unsigned long off, len; + + /* The length of the path as given in the CDF and the path itself. + path[0] is the top DF (usually 0x3f00). The path will never be + empty. */ + size_t pathlen; + unsigned short path[1]; +}; +typedef struct cdf_object_s *cdf_object_t; + + +/* This is an object to store information about a Private Key + Directory File (PrKDF) in a format suitable for further processing + by us. To keep memory management, simple we use a linked list of + items; i.e. one such object represents one certificate and the list + the entire PrKDF. */ +struct prkdf_object_s +{ + /* Link to next item when used in a linked list. */ + struct prkdf_object_s *next; + + /* Length and allocated buffer with the Id of this object. */ + size_t objidlen; + unsigned char *objid; + + /* Length and allocated buffer with the authId of this object or + NULL if no authID is known. */ + size_t authidlen; + unsigned char *authid; + + /* The key's usage flags. */ + keyusage_flags_t usageflags; + + /* The keyReference and a flag telling whether it is valid. */ + unsigned long key_reference; + int key_reference_valid; + + /* Set to true if a length and offset is available. */ + int have_off; + /* The offset and length of the object. They are only valid if + HAVE_OFF is true and set to 0 if HAVE_OFF is false. */ + unsigned long off, len; + + /* The length of the path as given in the PrKDF and the path itself. + path[0] is the top DF (usually 0x3f00). */ + size_t pathlen; + unsigned short path[1]; +}; +typedef struct prkdf_object_s *prkdf_object_t; + + +/* This is an object to store information about a Authentication + Object Directory File (AODF) in a format suitable for further + processing by us. To keep memory management, simple we use a linked + list of items; i.e. one such object represents one authentication + object and the list the entire AOKDF. */ +struct aodf_object_s +{ + /* Link to next item when used in a linked list. */ + struct aodf_object_s *next; + + /* Length and allocated buffer with the Id of this object. */ + size_t objidlen; + unsigned char *objid; + + /* Length and allocated buffer with the authId of this object or + NULL if no authID is known. */ + size_t authidlen; + unsigned char *authid; + + /* The PIN Flags. */ + struct + { + unsigned int case_sensitive: 1; + unsigned int local: 1; + unsigned int change_disabled: 1; + unsigned int unblock_disabled: 1; + unsigned int initialized: 1; + unsigned int needs_padding: 1; + unsigned int unblocking_pin: 1; + unsigned int so_pin: 1; + unsigned int disable_allowed: 1; + unsigned int integrity_protected: 1; + unsigned int confidentiality_protected: 1; + unsigned int exchange_ref_data: 1; + } pinflags; + + /* The PIN Type. */ + pin_type_t pintype; + + /* The minimum length of a PIN. */ + unsigned long min_length; + + /* The stored length of a PIN. */ + unsigned long stored_length; + + /* The maximum length of a PIN and a flag telling whether it is valid. */ + unsigned long max_length; + int max_length_valid; + + /* The pinReference and a flag telling whether it is valid. */ + unsigned long pin_reference; + int pin_reference_valid; + + /* The padChar and a flag telling whether it is valid. */ + char pad_char; + int pad_char_valid; + + + /* Set to true if a length and offset is available. */ + int have_off; + /* The offset and length of the object. They are only valid if + HAVE_OFF is true and set to 0 if HAVE_OFF is false. */ + unsigned long off, len; + + /* The length of the path as given in the Aodf and the path itself. + path[0] is the top DF (usually 0x3f00). PATH is optional and thus + may be NULL. Malloced.*/ + size_t pathlen; + unsigned short *path; +}; +typedef struct aodf_object_s *aodf_object_t; /* Context local to this application. */ struct app_local_s { - unsigned short home_df; /* The home DF. Note, that we don't yet - support a multilevel hierachy. Thus we - assume this is directly below the MF. */ + /* The home DF. Note, that we don't yet support a multilevel + hierachy. Thus we assume this is directly below the MF. */ + unsigned short home_df; + + /* The type of the card. */ + card_type_t card_type; + + /* Structure with the EFIDs of the objects described in the ODF + file. */ struct { unsigned short private_keys; @@ -52,16 +270,104 @@ struct app_local_s unsigned short auth_objects; } odf; + /* Information on all certificates. */ + cdf_object_t certificate_info; + /* Information on all trusted certificates. */ + cdf_object_t trusted_certificate_info; + /* Information on all useful certificates. */ + cdf_object_t useful_certificate_info; + + /* Information on all private keys. */ + prkdf_object_t private_key_info; + + /* Information on all authentication objects. */ + aodf_object_t auth_object_info; }; +/*** Local prototypes. ***/ +static gpg_error_t readcert_by_cdf (app_t app, cdf_object_t cdf, + unsigned char **r_cert, size_t *r_certlen); + -/* Do a select and a read for the file with EFID. EFID is a +/* Release the CDF object A */ +static void +release_cdflist (cdf_object_t a) +{ + while (a) + { + cdf_object_t tmp = a->next; + xfree (a->image); + xfree (a->objid); + xfree (a); + a = tmp; + } +} + +/* Release the PrKDF object A. */ +static void +release_prkdflist (prkdf_object_t a) +{ + while (a) + { + prkdf_object_t tmp = a->next; + xfree (a->objid); + xfree (a->authid); + xfree (a); + a = tmp; + } +} + +/* Release just one aodf object. */ +void +release_aodf_object (aodf_object_t a) +{ + if (a) + { + xfree (a->objid); + xfree (a->authid); + xfree (a->path); + xfree (a); + } +} + +/* Release the AODF list A. */ +static void +release_aodflist (aodf_object_t a) +{ + while (a) + { + aodf_object_t tmp = a->next; + release_aodf_object (a); + a = tmp; + } +} + + +/* Release all local resources. */ +static void +do_deinit (app_t app) +{ + if (app && app->app_local) + { + release_cdflist (app->app_local->certificate_info); + release_cdflist (app->app_local->trusted_certificate_info); + release_cdflist (app->app_local->useful_certificate_info); + release_prkdflist (app->app_local->private_key_info); + release_aodflist (app->app_local->auth_object_info); + xfree (app->app_local); + app->app_local = NULL; + } +} + + + +/* Do a select and a read for the file with EFID. EFID_DESC is a desctription of the EF to be used with error messages. On success BUFFER and BUFLEN contain the entire content of the EF. The caller - must free BUFFER but only on success. */ + must free BUFFER only on success. */ static gpg_error_t select_and_read_binary (int slot, unsigned short efid, const char *efid_desc, unsigned char **buffer, size_t *buflen) @@ -86,10 +392,151 @@ select_and_read_binary (int slot, unsigned short efid, const char *efid_desc, } +/* This function calls select file to read a file suing a complete + path which may or may not start at the master file (MF). */ +static gpg_error_t +select_ef_by_path (app_t app, const unsigned short *path, size_t pathlen) +{ + gpg_error_t err; + int i, j; + + /* FIXME: Need code to remember the last PATH so that we can decide + what select commands to send in case the path does not start off + with 3F00. We might also want to use direct path selection if + supported by the card. */ + if (pathlen && *path != 0x3f00 ) + log_debug ("WARNING: relative path selection not yet implemented\n"); + + for (i=0; i < pathlen; i++) + { + err = iso7816_select_file (app->slot, path[i], + !(i+1 == pathlen), NULL, NULL); + if (err) + { + log_error ("error selecting part %d from path ", i); + for (j=0; j < pathlen; j++) + log_printf ("%04hX", path[j]); + log_printf (": %s\n", gpg_strerror (err)); + return err; + } + } + return 0; +} + +/* Parse a cert Id string (or a key Id string) and return the binary + object Id string in a newly allocated buffer stored at R_OBJID and + R_OBJIDLEN. On Error NULL will be stored there and an error code + returned. On success caller needs to free the buffer at R_OBJID. */ +static gpg_error_t +parse_certid (app_t app, const char *certid, + unsigned char **r_objid, size_t *r_objidlen) +{ + char tmpbuf[10]; + const char *s; + size_t objidlen; + unsigned char *objid; + int i; + + *r_objid = NULL; + *r_objidlen = 0; + + if (app->app_local->home_df) + sprintf (tmpbuf, "P15-%04hX.", (app->app_local->home_df & 0xffff)); + else + strcpy (tmpbuf, "P15."); + if (strncmp (certid, tmpbuf, strlen (tmpbuf)) ) + { + if (!strncmp (certid, "P15.", 4) + || (!strncmp (certid, "P15-", 4) + && hexdigitp (certid+4) + && hexdigitp (certid+5) + && hexdigitp (certid+6) + && hexdigitp (certid+7) + && certid[8] == '.')) + return gpg_error (GPG_ERR_NOT_FOUND); + return gpg_error (GPG_ERR_INV_ID); + } + certid += strlen (tmpbuf); + + for (s=certid, objidlen=0; hexdigitp (s); s++, objidlen++) + ; + if (*s || !objidlen || (objidlen%2)) + return gpg_error (GPG_ERR_INV_ID); + objidlen /= 2; + objid = xtrymalloc (objidlen); + if (!objid) + return gpg_error_from_errno (errno); + for (s=certid, i=0; i < objidlen; i++, s+=2) + objid[i] = xtoi_2 (s); + *r_objid = objid; + *r_objidlen = objidlen; + return 0; +} + + +/* Find a certificate object by the certificate ID CERTID and store a + pointer to it at R_CDF. */ +static gpg_error_t +cdf_object_from_certid (app_t app, const char *certid, cdf_object_t *r_cdf) +{ + gpg_error_t err; + size_t objidlen; + unsigned char *objid; + cdf_object_t cdf; + + err = parse_certid (app, certid, &objid, &objidlen); + if (err) + return err; + + for (cdf = app->app_local->certificate_info; cdf; cdf = cdf->next) + if (cdf->objidlen == objidlen && !memcmp (cdf->objid, objid, objidlen)) + break; + if (!cdf) + for (cdf = app->app_local->trusted_certificate_info; cdf; cdf = cdf->next) + if (cdf->objidlen == objidlen && !memcmp (cdf->objid, objid, objidlen)) + break; + if (!cdf) + for (cdf = app->app_local->useful_certificate_info; cdf; cdf = cdf->next) + if (cdf->objidlen == objidlen && !memcmp (cdf->objid, objid, objidlen)) + break; + xfree (objid); + if (!cdf) + return gpg_error (GPG_ERR_NOT_FOUND); + *r_cdf = cdf; + return 0; +} +/* Find a private key object by the key Id string KEYIDSTR and store a + pointer to it at R_PRKDF. */ +static gpg_error_t +prkdf_object_from_keyidstr (app_t app, const char *keyidstr, + prkdf_object_t *r_prkdf) +{ + gpg_error_t err; + size_t objidlen; + unsigned char *objid; + prkdf_object_t prkdf; + + err = parse_certid (app, keyidstr, &objid, &objidlen); + if (err) + return err; + + for (prkdf = app->app_local->private_key_info; prkdf; prkdf = prkdf->next) + if (prkdf->objidlen == objidlen && !memcmp (prkdf->objid, objid, objidlen)) + break; + xfree (objid); + if (!prkdf) + return gpg_error (GPG_ERR_NOT_FOUND); + *r_prkdf = prkdf; + return 0; +} + + + + /* Read and parse the Object Directory File and store away the - pointers. + pointers. ODF_FID shall contain the FID of the ODF. Example of such a file: @@ -99,32 +546,49 @@ select_and_read_binary (int slot, unsigned short efid, const char *efid_desc, A7 06 30 04 04 02 60 37 = DataObjects A8 06 30 04 04 02 60 38 = AuthObjects - These are all PathOrObjects using the path CHOICE. The paths are - octet strings of length 2. Using this Path CHOICE is recommended, - so we only implement that for now. + These are all PathOrObjects using the path CHOICE element. The + paths are octet strings of length 2. Using this Path CHOICE + element is recommended, so we only implement that for now. */ static gpg_error_t -read_ef_odf (app_t app) +read_ef_odf (app_t app, unsigned short odf_fid) { gpg_error_t err; unsigned char *buffer, *p; size_t buflen; unsigned short value; + size_t offset; - err = select_and_read_binary (app->slot, 0x5031, "ODF", &buffer, &buflen); + err = select_and_read_binary (app->slot, odf_fid, "ODF", &buffer, &buflen); if (err) return err; - if (len < 8) + if (buflen < 8) { log_error ("error: ODF too short\n"); xfree (buffer); return gpg_error (GPG_ERR_INV_OBJ); } - for (p=buffer; buflen >= 8; p += 8, buflen -= 8) + p = buffer; + while (buflen && *p && *p != 0xff) { - if ( (p[0] & 0xf0) != 0xA0 - || memcmp (p+1, "\x06\x30\x04\x04\x02", 5) ) + if ( buflen >= 8 + && (p[0] & 0xf0) == 0xA0 + && !memcmp (p+1, "\x06\x30\x04\x04\x02", 5) ) + { + offset = 6; + } + else if ( buflen >= 12 + && (p[0] & 0xf0) == 0xA0 + && !memcmp (p+1, "\x0a\x30\x08\x04\x06\x3F\x00\x50\x15", 9) + && app->app_local->home_df == 0x5015 ) + { + /* This format using a full path is used by a self-created + test card of mine. I have not checked whether this is + legal. We assume a home DF of 0x5015 here. */ + offset = 10; + } + else { log_error ("ODF format is not supported by us\n"); xfree (buffer); @@ -145,10 +609,10 @@ read_ef_odf (app_t app) } if (value) { - log_error ("duplicate object type %d in ODF ignored\n",(p[0)&0x0f)); + log_error ("duplicate object type %d in ODF ignored\n",(p[0]&0x0f)); continue; } - value = ((p[6] << 8) | p[7]); + value = ((p[offset] << 8) | p[offset+1]); switch ((p[0] & 0x0f)) { case 0: app->app_local->odf.private_keys = value; break; @@ -161,8 +625,14 @@ read_ef_odf (app_t app) case 7: app->app_local->odf.data_objects = value; break; case 8: app->app_local->odf.auth_objects = value; break; default: - log_error ("unknown object type %d in ODF ignored\n", (p[0)&0x0f)); + log_error ("unknown object type %d in ODF ignored\n", (p[0]&0x0f)); } + offset += 2; + + if (buflen < offset) + break; + p += offset; + buflen -= offset; } if (buflen) @@ -173,6 +643,70 @@ read_ef_odf (app_t app) } +/* Parse the BIT STRING with the keyUsageFlags from teh + CommonKeyAttributes. */ +static gpg_error_t +parse_keyusage_flags (const unsigned char *der, size_t derlen, + keyusage_flags_t *usageflags) +{ + unsigned int bits, mask; + int i, unused, full; + + memset (usageflags, 0, sizeof *usageflags); + if (!derlen) + return gpg_error (GPG_ERR_INV_OBJ); + + unused = *der++; derlen--; + if ((!derlen && unused) || unused/8 > derlen) + return gpg_error (GPG_ERR_ENCODING_PROBLEM); + full = derlen - (unused+7)/8; + unused %= 8; + mask = 0; + for (i=1; unused; i <<= 1, unused--) + mask |= i; + + /* First octet */ + if (derlen) + { + bits = *der++; derlen--; + if (full) + full--; + else + { + bits &= ~mask; + mask = 0; + } + } + else + bits = 0; + if ((bits & 0x80)) usageflags->encrypt = 1; + if ((bits & 0x40)) usageflags->decrypt = 1; + if ((bits & 0x20)) usageflags->sign = 1; + if ((bits & 0x10)) usageflags->sign_recover = 1; + if ((bits & 0x08)) usageflags->wrap = 1; + if ((bits & 0x04)) usageflags->unwrap = 1; + if ((bits & 0x02)) usageflags->verify = 1; + if ((bits & 0x01)) usageflags->verify_recover = 1; + + /* Second octet. */ + if (derlen) + { + bits = *der++; derlen--; + if (full) + full--; + else + { + bits &= ~mask; + mask = 0; + } + } + else + bits = 0; + if ((bits & 0x80)) usageflags->derive = 1; + if ((bits & 0x40)) usageflags->non_repudiation = 1; + + return 0; +} /* Read and parse the Private Key Directory Files. */ /* @@ -195,120 +729,504 @@ read_ef_odf (app_t app) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ + 0 30 51: SEQUENCE { + 2 30 17: SEQUENCE { -- commonObjectAttributes + 4 0C 8: UTF8String 'SK.CH.DS' + 14 03 2: BIT STRING 6 unused bits + : '01'B (bit 0) + 18 04 1: OCTET STRING --authid + : 07 + : } + 21 30 12: SEQUENCE { -- commonKeyAttributes + 23 04 1: OCTET STRING + : 01 + 26 03 3: BIT STRING 6 unused bits + : '1000000000'B (bit 9) + 31 02 2: INTEGER 80 -- keyReference (optional) + : } + 35 A1 16: [1] { -- keyAttributes + 37 30 14: SEQUENCE { -- privateRSAKeyAttributes + 39 30 8: SEQUENCE { -- objectValue + 41 04 6: OCTET STRING --path + : 3F 00 40 16 00 50 + : } + 49 02 2: INTEGER 1024 -- modulus + : } + : } + : } + + */ static gpg_error_t -read_ef_prkdf (app_t app) +read_ef_prkdf (app_t app, unsigned short fid, prkdf_object_t *result) { + gpg_error_t err; + unsigned char *buffer = NULL; + size_t buflen; + const unsigned char *p; + size_t n, objlen, hdrlen; + int class, tag, constructed, ndef; + prkdf_object_t prkdflist = NULL; + int i; + + if (!fid) + return gpg_error (GPG_ERR_NO_DATA); /* No private keys. */ + + err = select_and_read_binary (app->slot, fid, "PrKDF", &buffer, &buflen); + if (err) + return err; + + p = buffer; + n = buflen; + /* FIXME: This shares a LOT of code with read_ef_cdf! */ -} + /* Loop over the records. We stop as soon as we detect a new record + starting with 0x00 or 0xff as these values are commonly used to + pad data blocks and are no valid ASN.1 encoding. */ + while (n && *p && *p != 0xff) + { + const unsigned char *pp; + size_t nn; + int where; + const char *errstr = NULL; + prkdf_object_t prkdf = NULL; + unsigned long ul; + const unsigned char *objid; + size_t objidlen; + const unsigned char *authid = NULL; + size_t authidlen = 0; + keyusage_flags_t usageflags; + unsigned long key_reference = 0; + int key_reference_valid = 0; + const char *s; -/* Read and parse the Public Key Directory Files. */ -static gpg_error_t -read_ef_pukdf (app_t app) -{ + err = parse_ber_header (&p, &n, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > n || tag != TAG_SEQUENCE)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + { + log_error ("error parsing PrKDF record: %s\n", gpg_strerror (err)); + goto leave; + } + pp = p; + nn = objlen; + p += objlen; + n -= objlen; + + /* Parse the commonObjectAttributes. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn || tag != TAG_SEQUENCE)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + { + const unsigned char *ppp = pp; + size_t nnn = objlen; + + pp += objlen; + nn -= objlen; + + /* Search the optional AuthId. We need to skip the optional + Label (UTF8STRING) and the optional CommonObjectFlags + (BITSTRING). */ + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn || class != CLASS_UNIVERSAL)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto no_authid; + if (err) + goto parse_error; + if (tag == TAG_UTF8_STRING) + { + ppp += objlen; /* Skip the Label. */ + nnn -= objlen; + + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn || class != CLASS_UNIVERSAL)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto no_authid; + if (err) + goto parse_error; + } + if (tag == TAG_BIT_STRING) + { + ppp += objlen; /* Skip the CommonObjectFlags. */ + nnn -= objlen; + + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn || class != CLASS_UNIVERSAL)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto no_authid; + if (err) + goto parse_error; + } + if (tag == TAG_OCTET_STRING && objlen) + { + authid = ppp; + authidlen = objlen; + } + no_authid: + ; + } + + /* Parse the commonKeyAttributes. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn || tag != TAG_SEQUENCE)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + { + const unsigned char *ppp = pp; + size_t nnn = objlen; + pp += objlen; + nn -= objlen; -} + /* Get the Id. */ + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn + || class != CLASS_UNIVERSAL || tag != TAG_OCTET_STRING)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + objid = ppp; + objidlen = objlen; + ppp += objlen; + nnn -= objlen; + + /* Get the KeyUsageFlags. */ + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn + || class != CLASS_UNIVERSAL || tag != TAG_BIT_STRING)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + err = parse_keyusage_flags (ppp, objlen, &usageflags); + if (err) + goto parse_error; + ppp += objlen; + nnn -= objlen; + + /* Find the keyReference */ + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto leave_cki; + if (!err && objlen > nnn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + if (class == CLASS_UNIVERSAL && tag == TAG_BOOLEAN) + { + /* Skip the native element. */ + ppp += objlen; + nnn -= objlen; + + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto leave_cki; + if (!err && objlen > nnn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + } + if (class == CLASS_UNIVERSAL && tag == TAG_BIT_STRING) + { + /* Skip the accessFlags. */ + ppp += objlen; + nnn -= objlen; + + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto leave_cki; + if (!err && objlen > nnn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + } + if (class == CLASS_UNIVERSAL && tag == TAG_INTEGER) + { + /* Yep, this is the keyReference. */ + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*ppp++) & 0xff; + nnn--; + } + key_reference = ul; + key_reference_valid = 1; + } + leave_cki: + ; + } -/* Read and parse the Certificate Directory Files. */ -/* -6035 (certificates) + /* Skip subClassAttributes. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + if (class == CLASS_CONTEXT && tag == 0) + { + pp += objlen; + nn -= objlen; + + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + } + /* Parse the keyAttributes. */ + if (!err && (objlen > nn || class != CLASS_CONTEXT || tag != 1)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + nn = objlen; -30 2A 30 15 0C 0C 43 5F 58 35 30 39 2E 43 48 2E 0*0...C_X509.CH. -44 53 03 02 06 40 04 01 0A 30 03 04 01 01 A1 0C [email protected]...... -30 0A 30 08 04 06 3F 00 40 16 C0 00 30 2A 30 15 [email protected]*0. -0C 0C 43 5F 58 35 30 39 2E 43 48 2E 4B 45 03 02 ..C_X509.CH.KE.. -06 40 04 01 0A 30 03 04 01 0C A1 0C 30 0A 30 08 [email protected]. -04 06 3F 00 40 16 C2 00 30 2B 30 16 0C 0D 43 5F [email protected]+0...C_ -58 35 30 39 2E 43 48 2E 41 55 54 03 02 06 40 04 X509.CH.AUT...@. -01 0A 30 03 04 01 0D A1 0C 30 0A 30 08 04 06 3F ..0......0.0...? -00 40 16 C5 00 30 2E 30 19 0C 10 43 5F 58 35 30 [email protected]_X50 -39 2E 43 48 2E 44 53 2D 53 50 58 03 02 06 40 04 9.CH.DS-SPX...@. -01 0A 30 03 04 01 02 A1 0C 30 0A 30 08 04 06 3F ..0......0.0...? -00 40 16 C1 20 00 00 00 00 00 00 00 00 00 00 00 .@.. ........... -00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ -00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ -00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ -00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + if (class == CLASS_UNIVERSAL && tag == TAG_SEQUENCE) + ; /* RSA */ + else if (class == CLASS_CONTEXT) + { + switch (tag) + { + case 0: errstr = "EC key objects are not supported"; break; + case 1: errstr = "DH key objects are not supported"; break; + case 2: errstr = "DSA key objects are not supported"; break; + case 3: errstr = "KEA key objects are not supported"; break; + default: errstr = "unknown privateKeyObject"; break; + } + goto parse_error; + } + else + { + err = gpg_error (GPG_ERR_INV_OBJ); + goto parse_error; + } - 0 42: SEQUENCE { - 2 21: SEQUENCE { -- commonObjectAttributes - 4 12: UTF8String 'C_X509.CH.DS' - 18 2: BIT STRING 6 unused bits - : '10'B (bit 1) - 22 1: OCTET STRING 0A - : } - 25 3: SEQUENCE { -- commonCertificateAttributes - 27 1: OCTET STRING 01 - : } - 30 12: [1] { -- certAttributes - 32 10: SEQUENCE { - 34 8: SEQUENCE { - 36 6: OCTET STRING 3F 00 40 16 C0 00 - : } - : } - : } - : } + nn = objlen; + /* Check that the reference is a Path object. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + if (class != CLASS_UNIVERSAL || tag != TAG_SEQUENCE) + { + errstr = "unsupported reference type"; + goto parse_error; + } + nn = objlen; + /* Parse the Path object. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; -6036 (trustedcertificates) + /* Make sure that the next element is a non zero path and of + even length (FID are two bytes each). */ + if (class != CLASS_UNIVERSAL || tag != TAG_OCTET_STRING + || !objlen || (objlen & 1) ) + { + errstr = "invalid path reference"; + goto parse_error; + } + /* Create a new PrKDF list item. */ + prkdf = xtrycalloc (1, (sizeof *prkdf + - sizeof(unsigned short) + + objlen/2 * sizeof(unsigned short))); + if (!prkdf) + { + err = gpg_error_from_errno (errno); + goto leave; + } + prkdf->objidlen = objidlen; + prkdf->objid = xtrymalloc (objidlen); + if (!prkdf->objid) + { + err = gpg_error_from_errno (errno); + xfree (prkdf); + goto leave; + } + memcpy (prkdf->objid, objid, objidlen); + if (authid) + { + prkdf->authidlen = authidlen; + prkdf->authid = xtrymalloc (authidlen); + if (!prkdf->authid) + { + err = gpg_error_from_errno (errno); + xfree (prkdf->objid); + xfree (prkdf); + goto leave; + } + memcpy (prkdf->authid, authid, authidlen); + } -30 35 30 06 03 02 00 00 04 00 30 16 04 14 2D 36 050.......0...-6 -33 39 33 33 39 34 30 33 39 37 37 36 34 30 31 32 3933940397764012 -31 36 A1 13 30 11 30 0F 04 06 3F 00 40 16 C7 08 16..0.0...?.@... -02 01 00 80 02 02 29 30 35 30 06 03 02 00 00 04 ......)050...... -00 30 16 04 14 2D 34 30 31 39 30 35 32 37 32 36 .0...-4019052726 -38 30 31 36 39 33 34 39 32 A1 13 30 11 30 0F 04 801693492..0.0.. -06 3F 00 40 16 C7 0E 02 01 00 80 02 04 12 30 34 [email protected] -30 06 03 02 00 00 04 00 30 15 04 13 37 39 36 33 0.......0...7963 -32 38 33 36 35 30 37 36 36 34 38 32 39 36 30 A1 283650766482960. -13 30 11 30 0F 04 06 3F 00 40 16 C0 08 02 01 00 .0.0...?.@...... -80 02 04 11 00 00 00 00 00 00 00 00 00 00 00 00 ................ -00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ + prkdf->pathlen = objlen/2; + for (i=0; i < prkdf->pathlen; i++, pp += 2, nn -= 2) + prkdf->path[i] = ((pp[0] << 8) | pp[1]); - 0 53: SEQUENCE { - 2 6: SEQUENCE { - 4 2: BIT STRING - : '00000000'B - : Error: Spurious zero bits in bitstring. - 8 0: OCTET STRING - : Error: Object has zero length. - : } - 10 22: SEQUENCE { - 12 20: OCTET STRING '-6393394039776401216' - : } - 34 19: [1] { - 36 17: SEQUENCE { - 38 15: SEQUENCE { - 40 6: OCTET STRING 3F 00 40 16 C7 08 - 48 1: INTEGER 0 -- index - 51 2: [0] 02 29 -- length - : } - : } - : } - : } + prkdf->usageflags = usageflags; + prkdf->key_reference = key_reference; + prkdf->key_reference_valid = key_reference_valid; + if (nn) + { + /* An index and length follows. */ + prkdf->have_off = 1; + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn + || class != CLASS_UNIVERSAL || tag != TAG_INTEGER)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*pp++) & 0xff; + nn--; + } + prkdf->off = ul; + + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn + || class != CLASS_CONTEXT || tag != 0)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*pp++) & 0xff; + nn--; + } + prkdf->len = ul; + } -*/ + + log_debug ("PrKDF %04hX: id=", fid); + for (i=0; i < prkdf->objidlen; i++) + log_printf ("%02X", prkdf->objid[i]); + log_printf (" path="); + for (i=0; i < prkdf->pathlen; i++) + log_printf ("%04hX", prkdf->path[i]); + if (prkdf->have_off) + log_printf ("[%lu/%lu]", prkdf->off, prkdf->len); + if (prkdf->authid) + { + log_printf (" authid="); + for (i=0; i < prkdf->authidlen; i++) + log_printf ("%02X", prkdf->authid[i]); + } + if (prkdf->key_reference_valid) + log_printf (" keyref=0x%02lX", prkdf->key_reference); + log_printf (" usage="); + s = ""; + if (prkdf->usageflags.encrypt) log_printf ("%sencrypt", s), s = ","; + if (prkdf->usageflags.decrypt) log_printf ("%sdecrypt", s), s = ","; + if (prkdf->usageflags.sign ) log_printf ("%ssign", s), s = ","; + if (prkdf->usageflags.sign_recover) + log_printf ("%ssign_recover", s), s = ","; + if (prkdf->usageflags.wrap ) log_printf ("%swrap", s), s = ","; + if (prkdf->usageflags.unwrap ) log_printf ("%sunwrap", s), s = ","; + if (prkdf->usageflags.verify ) log_printf ("%sverify", s), s = ","; + if (prkdf->usageflags.verify_recover) + log_printf ("%sverify_recover", s), s = ","; + if (prkdf->usageflags.derive ) log_printf ("%sderive", s), s = ","; + if (prkdf->usageflags.non_repudiation) + log_printf ("%snon_repudiation", s), s = ","; + log_printf ("\n"); + + /* Put it into the list. */ + prkdf->next = prkdflist; + prkdflist = prkdf; + prkdf = NULL; + continue; /* Ready. */ + + parse_error: + log_error ("error parsing PrKDF record (%d): %s - skipped\n", + where, errstr? errstr : gpg_strerror (err)); + if (prkdf) + { + xfree (prkdf->objid); + xfree (prkdf->authid); + xfree (prkdf); + } + err = 0; + } /* End looping over all records. */ + + leave: + xfree (buffer); + if (err) + release_prkdflist (prkdflist); + else + *result = prkdflist; + return err; +} + + +/* Read and parse the Certificate Directory Files identified by FID. + On success a newlist of CDF object gets stored at RESULT and the + caller is then responsible of releasing this list. On error a + error code is returned and RESULT won't get changed. */ static gpg_error_t -read_ef_cdf (app_t app) +read_ef_cdf (app_t app, unsigned short fid, cdf_object_t *result) { gpg_error_t err; unsigned char *buffer = NULL; size_t buflen; - unsigned short value; - unsigned short fid; const unsigned char *p; size_t n, objlen, hdrlen; int class, tag, constructed, ndef; + cdf_object_t cdflist = NULL; + int i; - fid = app->app_local->odf.certificates; if (!fid) - return 0; /* No certificates. */ + return gpg_error (GPG_ERR_NO_DATA); /* No certificates. */ err = select_and_read_binary (app->slot, fid, "CDF", &buffer, &buflen); if (err) @@ -318,13 +1236,19 @@ read_ef_cdf (app_t app) n = buflen; /* Loop over the records. We stop as soon as we detect a new record - starting with 0x00 or 0xff as these values are commonly used to pad - the the read datablocks and are no valid ASN.1 encoding. */ - while (n && *p && *p == 0xff) + starting with 0x00 or 0xff as these values are commonly used to + pad data blocks and are no valid ASN.1 encoding. */ + while (n && *p && *p != 0xff) { const unsigned char *pp; size_t nn; - + int where; + const char *errstr = NULL; + cdf_object_t cdf = NULL; + unsigned long ul; + const unsigned char *objid; + size_t objidlen; + err = parse_ber_header (&p, &n, &class, &tag, &constructed, &ndef, &objlen, &hdrlen); if (!err && (objlen > n || tag != TAG_SEQUENCE)) @@ -340,136 +1264,843 @@ read_ef_cdf (app_t app) n -= objlen; /* Skip the commonObjectAttributes. */ + where = __LINE__; err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, &ndef, &objlen, &hdrlen); if (!err && (objlen > nn || tag != TAG_SEQUENCE)) err = gpg_error (GPG_ERR_INV_OBJ); if (err) - { - log_error ("error parsing CDF record: %s - skipped\n", - gpg_strerror (err)); - continue; - } + goto parse_error; pp += objlen; nn -= objlen; - /* Skip the commonCertificateAttributes. */ + /* Parse the commonCertificateAttributes. */ + where = __LINE__; err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, &ndef, &objlen, &hdrlen); if (!err && (objlen > nn || tag != TAG_SEQUENCE)) err = gpg_error (GPG_ERR_INV_OBJ); if (err) + goto parse_error; + { + const unsigned char *ppp = pp; + size_t nnn = objlen; + + pp += objlen; + nn -= objlen; + + /* Get the Id. */ + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn + || class != CLASS_UNIVERSAL || tag != TAG_OCTET_STRING)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + objid = ppp; + objidlen = objlen; + } + + /* Parse the certAttribute. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn || class != CLASS_CONTEXT || tag != 1)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + nn = objlen; + + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn + || class != CLASS_UNIVERSAL || tag != TAG_SEQUENCE)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + nn = objlen; + + /* Check that the reference is a Path object. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + if (class != CLASS_UNIVERSAL || tag != TAG_SEQUENCE) { - log_error ("error parsing CDF record: %s - skipped\n", - gpg_strerror (err)); + errstr = "unsupported reference type"; continue; } - pp += objlen; - nn -= objlen; + nn = objlen; - /* FIXME: Check that this is a reference to a certificate. */ + /* Parse the Path object. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + /* Make sure that the next element is a non zero path and of + even length (FID are two bytes each). */ + if (class != CLASS_UNIVERSAL || tag != TAG_OCTET_STRING + || !objlen || (objlen & 1) ) + { + errstr = "invalid path reference"; + goto parse_error; + } + /* Create a new CDF list item. */ + cdf = xtrycalloc (1, (sizeof *cdf + - sizeof(unsigned short) + + objlen/2 * sizeof(unsigned short))); + if (!cdf) + { + err = gpg_error_from_errno (errno); + goto leave; + } + cdf->objidlen = objidlen; + cdf->objid = xtrymalloc (objidlen); + if (!cdf->objid) + { + err = gpg_error_from_errno (errno); + xfree (cdf); + goto leave; + } + memcpy (cdf->objid, objid, objidlen); - } + cdf->pathlen = objlen/2; + for (i=0; i < cdf->pathlen; i++, pp += 2, nn -= 2) + cdf->path[i] = ((pp[0] << 8) | pp[1]); + + if (nn) + { + /* An index and length follows. */ + cdf->have_off = 1; + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn + || class != CLASS_UNIVERSAL || tag != TAG_INTEGER)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*pp++) & 0xff; + nn--; + } + cdf->off = ul; + + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn + || class != CLASS_CONTEXT || tag != 0)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*pp++) & 0xff; + nn--; + } + cdf->len = ul; + } + log_debug ("CDF %04hX: id=", fid); + for (i=0; i < cdf->objidlen; i++) + log_printf ("%02X", cdf->objid[i]); + log_printf (" path="); + for (i=0; i < cdf->pathlen; i++) + log_printf ("%04hX", cdf->path[i]); + if (cdf->have_off) + log_printf ("[%lu/%lu]", cdf->off, cdf->len); + log_printf ("\n"); + + /* Put it into the list. */ + cdf->next = cdflist; + cdflist = cdf; + cdf = NULL; + continue; /* Ready. */ + + parse_error: + log_error ("error parsing CDF record (%d): %s - skipped\n", + where, errstr? errstr : gpg_strerror (err)); + xfree (cdf); + err = 0; + } /* End looping over all records. */ leave: xfree (buffer); + if (err) + release_cdflist (cdflist); + else + *result = cdflist; return err; } -/* Read and parse Authentication Object Directory Files. */ -static gpg_error_t -read_ef_aodf (app_t app) + +/* +SEQUENCE { + SEQUENCE { -- CommonObjectAttributes + UTF8String 'specific PIN for DS' + BIT STRING 0 unused bits + '00000011'B + } + SEQUENCE { -- CommonAuthenticationObjectAttributes + OCTET STRING + 07 -- iD + } + + [1] { -- typeAttributes + SEQUENCE { -- PinAttributes + BIT STRING 0 unused bits + '0000100000110010'B -- local,initialized,needs-padding + -- exchangeRefData + ENUMERATED 1 -- ascii-numeric + INTEGER 6 -- minLength + INTEGER 6 -- storedLength + INTEGER 8 -- maxLength + [0] + 02 -- pinReference + GeneralizedTime 19/04/2002 12:12 GMT -- lastPinChange + SEQUENCE { + OCTET STRING + 3F 00 40 16 -- path to DF of PIN + } + } + } + } + +*/ +/* Read and parse an Authentication Object Directory File identified + by FID. On success a newlist of AODF objects gets stored at RESULT + and the caller is responsible of releasing this list. On error a + error code is returned and RESULT won't get changed. */ +static gpg_error_t +read_ef_aodf (app_t app, unsigned short fid, aodf_object_t *result) { + gpg_error_t err; + unsigned char *buffer = NULL; + size_t buflen; + const unsigned char *p; + size_t n, objlen, hdrlen; + int class, tag, constructed, ndef; + aodf_object_t aodflist = NULL; + int i; + + if (!fid) + return gpg_error (GPG_ERR_NO_DATA); /* No authentication objects. */ + + err = select_and_read_binary (app->slot, fid, "AODF", &buffer, &buflen); + if (err) + return err; + + p = buffer; + n = buflen; -} + /* FIXME: This shares a LOT of code with read_ef_prkdf! */ + /* Loop over the records. We stop as soon as we detect a new record + starting with 0x00 or 0xff as these values are commonly used to + pad data blocks and are no valid ASN.1 encoding. */ + while (n && *p && *p != 0xff) + { + const unsigned char *pp; + size_t nn; + int where; + const char *errstr = NULL; + aodf_object_t aodf = NULL; + unsigned long ul; + const char *s; -/* 6037 (dataobjects) - -30 1E 30 0B 0C 06 45 46 2E 47 44 4F 04 01 0A 30 0.0...EF.GDO...0 -02 0C 00 A1 0B 30 09 04 04 3F 00 2F 02 80 01 0E .....0...?./.... -30 30 30 18 0C 0F 64 69 73 70 6C 61 79 20 6D 65 000...display me -73 73 61 67 65 03 02 06 C0 04 01 0A 30 05 0C 03 ssage.......0... -42 53 53 A1 0D 30 0B 04 06 3F 00 40 16 D0 00 80 BSS..0...?.@.... -01 20 30 2B 30 0C 0C 03 53 53 4F 03 02 06 C0 04 . 0+0...SSO..... -01 0A 30 0B 0C 09 53 61 66 65 47 75 61 72 64 A1 ..0...SafeGuard. -0E 30 0C 04 06 3F 00 0F FF 30 02 80 02 03 00 30 .0...?...0.....0 -30 30 11 0C 08 53 47 41 53 64 61 74 61 03 02 06 00...SGASdata... -C0 04 01 0A 30 0B 0C 09 53 61 66 65 47 75 61 72 ....0...SafeGuar -64 A1 0E 30 0C 04 06 3F 00 0F FF 40 01 80 02 00 d..0...?...@.... -80 30 30 30 11 0C 08 55 73 65 72 64 61 74 61 03 .000...Userdata. -02 06 40 04 01 0A 30 0B 0C 09 53 61 66 65 47 75 [email protected] -61 72 64 A1 0E 30 0C 04 06 3F 00 0F FF 30 01 80 ard..0...?...0.. -02 01 00 30 2C 30 13 0C 0A 62 61 73 69 63 20 64 ...0,0...basic d -61 74 61 03 02 06 C0 04 01 0A 30 05 0C 03 49 44 ata.......0...ID -44 A1 0E 30 0C 04 06 3F 00 40 17 D0 01 80 02 02 D..0...?.@...... -00 30 2F 30 16 0C 0D 65 78 74 65 6E 64 65 64 20 .0/0...extended -64 61 74 61 03 02 06 C0 04 01 0A 30 05 0C 03 49 data.......0...I -44 44 A1 0E 30 0C 04 06 3F 00 40 17 D0 02 80 02 DD..0...?.@..... -08 00 30 34 30 1B 0C 12 73 70 65 63 69 61 6C 20 ..040...special -70 72 69 76 69 6C 65 67 65 73 03 02 06 C0 04 01 privileges...... -0A 30 05 0C 03 49 44 44 A1 0E 30 0C 04 06 3F 00 .0...IDD..0...?. -40 17 D0 03 80 02 04 00 @....... - - 0 30: SEQUENCE { - 2 11: SEQUENCE { - 4 6: UTF8String 'EF.GDO' - 12 1: OCTET STRING 0A - : } - 15 2: SEQUENCE { - 17 0: UTF8String - : Error: Object has zero length. - : } - 19 11: [1] { - 21 9: SEQUENCE { - 23 4: OCTET STRING 3F 00 2F 02 - 29 1: [0] 0E - : } - : } - : } + err = parse_ber_header (&p, &n, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > n || tag != TAG_SEQUENCE)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + { + log_error ("error parsing AODF record: %s\n", gpg_strerror (err)); + goto leave; + } + pp = p; + nn = objlen; + p += objlen; + n -= objlen; + /* Allocate memory for a new AODF list item. */ + aodf = xtrycalloc (1, sizeof *aodf); + if (!aodf) + goto no_core; + /* Parse the commonObjectAttributes. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn || tag != TAG_SEQUENCE)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + { + const unsigned char *ppp = pp; + size_t nnn = objlen; + + pp += objlen; + nn -= objlen; + + /* Search the optional AuthId. We need to skip the optional + Label (UTF8STRING) and the optional CommonObjectFlags + (BITSTRING). */ + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn || class != CLASS_UNIVERSAL)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto no_authid; + if (err) + goto parse_error; + if (tag == TAG_UTF8_STRING) + { + ppp += objlen; /* Skip the Label. */ + nnn -= objlen; + + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn || class != CLASS_UNIVERSAL)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto no_authid; + if (err) + goto parse_error; + } + if (tag == TAG_BIT_STRING) + { + ppp += objlen; /* Skip the CommonObjectFlags. */ + nnn -= objlen; + + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn || class != CLASS_UNIVERSAL)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto no_authid; + if (err) + goto parse_error; + } + if (tag == TAG_OCTET_STRING && objlen) + { + aodf->authidlen = objlen; + aodf->authid = xtrymalloc (objlen); + if (!aodf->authid) + goto no_core; + memcpy (aodf->authid, ppp, objlen); + } + no_authid: + ; + } + + /* Parse the CommonAuthenticationObjectAttributes. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn || tag != TAG_SEQUENCE)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + { + const unsigned char *ppp = pp; + size_t nnn = objlen; -6038 (authobjects) - -30 2A 30 0B 0C 05 62 61 73 69 63 03 02 00 C0 30 0*0...basic....0 -03 04 01 0A A1 16 30 14 03 03 00 0C 10 0A 01 01 ......0......... -02 01 06 02 01 06 02 01 08 80 01 01 30 51 30 19 ............0Q0. -0C 13 73 70 65 63 69 66 69 63 20 50 49 4E 20 66 ..specific PIN f -6F 72 20 44 53 03 02 00 C0 30 03 04 01 07 A1 2F or DS....0...../ -30 2D 03 03 00 4C 10 0A 01 01 02 01 06 02 01 06 0-...L.......... -02 01 08 80 01 02 18 0F 32 30 30 32 30 34 31 39 ........20020419 -31 32 31 33 34 31 5A 30 06 04 04 3F 00 40 16 121341Z0...?.@. - - 0 42: SEQUENCE { - 2 11: SEQUENCE { - 4 5: UTF8String 'basic' - 11 2: BIT STRING - : '00000011'B - : Error: Spurious zero bits in bitstring. - : } - 15 3: SEQUENCE { - 17 1: OCTET STRING 0A - : } - 20 22: [1] { - 22 20: SEQUENCE { - 24 3: BIT STRING - : '0000100000110000'B - : Error: Spurious zero bits in bitstring. - 29 1: ENUMERATED 1 - 32 1: INTEGER 6 - 35 1: INTEGER 6 - 38 1: INTEGER 8 - 41 1: [0] 01 - : } - : } - : } + pp += objlen; + nn -= objlen; + + /* Get the Id. */ + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn + || class != CLASS_UNIVERSAL || tag != TAG_OCTET_STRING)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + + aodf->objidlen = objlen; + aodf->objid = xtrymalloc (objlen); + if (!aodf->objid) + goto no_core; + memcpy (aodf->objid, ppp, objlen); + } + + /* Parse the typeAttributes. */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn || class != CLASS_CONTEXT || tag != 1)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + nn = objlen; + + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + if (class == CLASS_UNIVERSAL && tag == TAG_SEQUENCE) + ; /* PinAttributes */ + else if (class == CLASS_CONTEXT) + { + switch (tag) + { + case 0: errstr = "biometric auth types are not supported"; break; + case 1: errstr = "authKey auth types are not supported"; break; + case 2: errstr = "external auth type are not supported"; break; + default: errstr = "unknown privateKeyObject"; break; + } + goto parse_error; + } + else + { + err = gpg_error (GPG_ERR_INV_OBJ); + goto parse_error; + } + + nn = objlen; + + /* PinFlags */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn || !objlen + || class != CLASS_UNIVERSAL || tag != TAG_BIT_STRING)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + + { + unsigned int bits, mask; + int unused, full; + + unused = *pp++; nn--; objlen--; + if ((!objlen && unused) || unused/8 > objlen) + { + err = gpg_error (GPG_ERR_ENCODING_PROBLEM); + goto parse_error; + } + full = objlen - (unused+7)/8; + unused %= 8; + mask = 0; + for (i=1; unused; i <<= 1, unused--) + mask |= i; + + /* The first octet */ + bits = 0; + if (objlen) + { + bits = *pp++; nn--; objlen--; + if (full) + full--; + else + { + bits &= ~mask; + mask = 0; + } + } + if ((bits & 0x80)) /* ASN.1 bit 0. */ + aodf->pinflags.case_sensitive = 1; + if ((bits & 0x40)) /* ASN.1 bit 1. */ + aodf->pinflags.local = 1; + if ((bits & 0x20)) + aodf->pinflags.change_disabled = 1; + if ((bits & 0x10)) + aodf->pinflags.unblock_disabled = 1; + if ((bits & 0x08)) + aodf->pinflags.initialized = 1; + if ((bits & 0x04)) + aodf->pinflags.needs_padding = 1; + if ((bits & 0x02)) + aodf->pinflags.unblocking_pin = 1; + if ((bits & 0x01)) + aodf->pinflags.so_pin = 1; + /* The second octet. */ + bits = 0; + if (objlen) + { + bits = *pp++; nn--; objlen--; + if (full) + full--; + else + { + bits &= ~mask; + mask = 0; + } + } + if ((bits & 0x80)) + aodf->pinflags.disable_allowed = 1; + if ((bits & 0x40)) + aodf->pinflags.integrity_protected = 1; + if ((bits & 0x20)) + aodf->pinflags.confidentiality_protected = 1; + if ((bits & 0x10)) + aodf->pinflags.exchange_ref_data = 1; + /* Skip remaining bits. */ + pp += objlen; + nn -= objlen; + } + + + /* PinType */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn + || class != CLASS_UNIVERSAL || tag != TAG_ENUMERATED)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (!err && (objlen > sizeof (pin_type_t) || objlen > sizeof (ul))) + err = gpg_error (GPG_ERR_UNSUPPORTED_ENCODING); + if (err) + goto parse_error; + + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*pp++) & 0xff; + nn--; + } + aodf->pintype = ul; + + + /* minLength */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn + || class != CLASS_UNIVERSAL || tag != TAG_INTEGER)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (!err && objlen > sizeof (ul)) + err = gpg_error (GPG_ERR_UNSUPPORTED_ENCODING); + if (err) + goto parse_error; + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*pp++) & 0xff; + nn--; + } + aodf->min_length = ul; + + + /* storedLength */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nn + || class != CLASS_UNIVERSAL || tag != TAG_INTEGER)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (!err && objlen > sizeof (ul)) + err = gpg_error (GPG_ERR_UNSUPPORTED_ENCODING); + if (err) + goto parse_error; + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*pp++) & 0xff; + nn--; + } + aodf->stored_length = ul; + + /* optional maxLength */ + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto ready; + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + if (class == CLASS_UNIVERSAL && tag == TAG_INTEGER) + { + if (objlen > sizeof (ul)) + { + err = gpg_error (GPG_ERR_UNSUPPORTED_ENCODING); + goto parse_error; + } + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*pp++) & 0xff; + nn--; + } + aodf->max_length = ul; + aodf->max_length_valid = 1; + + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto ready; + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + } + + /* Optional pinReference. */ + if (class == CLASS_CONTEXT && tag == 0) + { + if (objlen > sizeof (ul)) + { + err = gpg_error (GPG_ERR_UNSUPPORTED_ENCODING); + goto parse_error; + } + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*pp++) & 0xff; + nn--; + } + aodf->pin_reference = ul; + aodf->pin_reference_valid = 1; + + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto ready; + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + } + + /* Optional padChar. */ + if (class == CLASS_UNIVERSAL && tag == TAG_OCTET_STRING) + { + if (objlen != 1) + { + errstr = "padChar is not of size(1)"; + goto parse_error; + } + aodf->pad_char = *pp++; nn--; + aodf->pad_char_valid = 1; + + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto ready; + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + } + + /* Skip optional lastPinChange. */ + if (class == CLASS_UNIVERSAL && tag == TAG_GENERALIZED_TIME) + { + pp += objlen; + nn -= objlen; + + where = __LINE__; + err = parse_ber_header (&pp, &nn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (gpg_err_code (err) == GPG_ERR_EOF) + goto ready; + if (!err && objlen > nn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + } + + /* Optional Path object. */ + if (class == CLASS_UNIVERSAL || tag == TAG_SEQUENCE) + { + const unsigned char *ppp = pp; + size_t nnn = objlen; + + pp += objlen; + nn -= objlen; + + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && objlen > nnn) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + + /* Make sure that the next element is a non zero FID and of + even length (FID are two bytes each). */ + if (class != CLASS_UNIVERSAL || tag != TAG_OCTET_STRING + || !objlen || (objlen & 1) ) + { + errstr = "invalid path reference"; + goto parse_error; + } + + aodf->pathlen = objlen/2; + aodf->path = xtrymalloc (aodf->pathlen); + if (!aodf->path) + goto no_core; + for (i=0; i < aodf->pathlen; i++, ppp += 2, nnn -= 2) + aodf->path[i] = ((ppp[0] << 8) | ppp[1]); + + if (nnn) + { + /* An index and length follows. */ + aodf->have_off = 1; + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn + || class != CLASS_UNIVERSAL || tag != TAG_INTEGER)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*ppp++) & 0xff; + nnn--; + } + aodf->off = ul; + + where = __LINE__; + err = parse_ber_header (&ppp, &nnn, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (!err && (objlen > nnn + || class != CLASS_CONTEXT || tag != 0)) + err = gpg_error (GPG_ERR_INV_OBJ); + if (err) + goto parse_error; + + for (ul=0; objlen; objlen--) + { + ul <<= 8; + ul |= (*ppp++) & 0xff; + nnn--; + } + aodf->len = ul; + } + } + + /* Igonore further objects which might be there due to future + extensions of pkcs#15. */ + + ready: + log_debug ("AODF %04hX: id=", fid); + for (i=0; i < aodf->objidlen; i++) + log_printf ("%02X", aodf->objid[i]); + if (aodf->authid) + { + log_printf (" authid="); + for (i=0; i < aodf->authidlen; i++) + log_printf ("%02X", aodf->authid[i]); + } + log_printf (" flags="); + s = ""; + if (aodf->pinflags.case_sensitive) + log_printf ("%scase_sensitive", s), s = ","; + if (aodf->pinflags.local) + log_printf ("%slocal", s), s = ","; + if (aodf->pinflags.change_disabled) + log_printf ("%schange_disabled", s), s = ","; + if (aodf->pinflags.unblock_disabled) + log_printf ("%sunblock_disabled", s), s = ","; + if (aodf->pinflags.initialized) + log_printf ("%sinitialized", s), s = ","; + if (aodf->pinflags.needs_padding) + log_printf ("%sneeds_padding", s), s = ","; + if (aodf->pinflags.unblocking_pin) + log_printf ("%sunblocking_pin", s), s = ","; + if (aodf->pinflags.so_pin) + log_printf ("%sso_pin", s), s = ","; + if (aodf->pinflags.disable_allowed) + log_printf ("%sdisable_allowed", s), s = ","; + if (aodf->pinflags.integrity_protected) + log_printf ("%sintegrity_protected", s), s = ","; + if (aodf->pinflags.confidentiality_protected) + log_printf ("%sconfidentiality_protected", s), s = ","; + if (aodf->pinflags.exchange_ref_data) + log_printf ("%sexchange_ref_data", s), s = ","; + { + char numbuf[50]; + switch (aodf->pintype) + { + case PIN_TYPE_BCD: s = "bcd"; break; + case PIN_TYPE_ASCII_NUMERIC: s = "ascii-numeric"; break; + case PIN_TYPE_UTF8: s = "utf8"; break; + case PIN_TYPE_HALF_NIBBLE_BCD: s = "half-nibble-bcd"; break; + case PIN_TYPE_ISO9564_1: s = "iso9564-1"; break; + default: + sprintf (numbuf, "%lu", (unsigned long)aodf->pintype); + s = numbuf; + } + log_printf (" type=%s", s); + } + log_printf (" min=%lu", aodf->min_length); + log_printf (" stored=%lu", aodf->stored_length); + if (aodf->max_length_valid) + log_printf (" max=%lu", aodf->max_length); + if (aodf->pad_char_valid) + log_printf (" pad=0x%02x", aodf->pad_char); + if (aodf->pin_reference_valid) + log_printf (" pinref=0x%02lX", aodf->pin_reference); + if (aodf->pathlen) + { + log_printf (" path="); + for (i=0; i < aodf->pathlen; i++) + log_printf ("%04hX", aodf->path[i]); + if (aodf->have_off) + log_printf ("[%lu/%lu]", aodf->off, aodf->len); + } + log_printf ("\n"); + + /* Put it into the list. */ + aodf->next = aodflist; + aodflist = aodf; + aodf = NULL; + continue; /* Ready. */ + + no_core: + err = gpg_error_from_errno (errno); + release_aodf_object (aodf); + goto leave; + + parse_error: + log_error ("error parsing AODF record (%d): %s - skipped\n", + where, errstr? errstr : gpg_strerror (err)); + err = 0; + release_aodf_object (aodf); + } /* End looping over all records. */ + + leave: + xfree (buffer); + if (err) + release_aodflist (aodflist); + else + *result = aodflist; + return err; +} -*/ /* Read and parse the EF(TokenInfo). @@ -521,105 +2152,678 @@ TokenFlags ::= BIT STRING { */ +/* static gpg_error_t */ +/* read_ef_tokeninfo (app_t app) */ +/* { */ +/* unsigned short efid = 0x5032; */ +/* return 0; */ +/* } */ + + +/* Get all the basic information from the pkcs#15 card, check the + structure and initialize our local context. This is used once at + application initialization. */ static gpg_error_t -read_ef_tokeninfo (app_t app) +read_p15_info (app_t app) { - unsigned short efid = 0x5032; + gpg_error_t err; + + /* Fixme: We might need to read the tokeninfo to get a non-standard + ODF FID. */ + + /* Read the ODF so that we know the location of all directory + files. */ + err = read_ef_odf (app, 0x5031); + if (err) + return err; + + /* Read certificate information. */ + assert (!app->app_local->certificate_info); + assert (!app->app_local->trusted_certificate_info); + assert (!app->app_local->useful_certificate_info); + err = read_ef_cdf (app, app->app_local->odf.certificates, + &app->app_local->certificate_info); + if (!err || gpg_err_code (err) == GPG_ERR_NO_DATA) + err = read_ef_cdf (app, app->app_local->odf.trusted_certificates, + &app->app_local->trusted_certificate_info); + if (!err || gpg_err_code (err) == GPG_ERR_NO_DATA) + err = read_ef_cdf (app, app->app_local->odf.useful_certificates, + &app->app_local->useful_certificate_info); + if (gpg_err_code (err) == GPG_ERR_NO_DATA) + err = 0; + if (err) + return err; + + /* Read information about private keys. */ + assert (!app->app_local->private_key_info); + err = read_ef_prkdf (app, app->app_local->odf.private_keys, + &app->app_local->private_key_info); + if (gpg_err_code (err) == GPG_ERR_NO_DATA) + err = 0; + if (err) + return err; + + /* Read information about authentication objects. */ + assert (!app->app_local->auth_object_info); + err = read_ef_aodf (app, app->app_local->odf.auth_objects, + &app->app_local->auth_object_info); + if (gpg_err_code (err) == GPG_ERR_NO_DATA) + err = 0; + + return err; } -/* Get all the basic information from the pkcs#15 card, check the - structure and init our context. This is used once at application - initialization. */ +/* Helper to do_learn_status: Send information about all certificates + listed in CERTINFO back. Use CERTTYPE as type of the + certificate. */ static gpg_error_t -read_p15_info (app_t app) +send_certinfo (app_t app, ctrl_t ctrl, const char *certtype, + cdf_object_t certinfo) { - gpg_error_t err; + for (; certinfo; certinfo = certinfo->next) + { + char *buf, *p; + int i; + + buf = xtrymalloc (9 + certinfo->objidlen*2 + 1); + if (!buf) + return gpg_error_from_errno (errno); + p = stpcpy (buf, "P15"); + if (app->app_local->home_df) + { + sprintf (p, "-%04hX", (app->app_local->home_df & 0xffff)); + p += 5; + } + p = stpcpy (p, "."); + for (i=0; i < certinfo->objidlen; i++) + { + sprintf (p, "%02X", certinfo->objid[i]); + p += 2; + } - err = read_ed_odf (app); + send_status_info (ctrl, "CERTINFO", + certtype, strlen (certtype), + buf, strlen (buf), + NULL, (size_t)0); + xfree (buf); + } + return 0; +} + + +/* Get the keygrip of the private key object PRKDF. On success the + keygrip gets returned in the caller provided 41 byte buffer + R_GRIPSTR. */ +static gpg_error_t +keygripstr_from_prkdf (app_t app, prkdf_object_t prkdf, char *r_gripstr) +{ + gpg_error_t err; + cdf_object_t cdf; + unsigned char *der; + size_t derlen; + ksba_cert_t cert; + + /* FIXME: We should check whether a public key directory file and a + matching public key for PRKDF is available. This should make + extraction of the key much easier. My current test card doesn't + have one, so we can only use the fallback solution bu looking for + a matching certificate and extract the key from there. */ + + /* Look for a matching certificate. A certificate matches if the Id + matches the obne of the private key info. */ + for (cdf = app->app_local->certificate_info; cdf; cdf = cdf->next) + if (cdf->objidlen == prkdf->objidlen + && !memcmp (cdf->objid, prkdf->objid, prkdf->objidlen)) + break; + if (!cdf) + for (cdf = app->app_local->trusted_certificate_info; cdf; cdf = cdf->next) + if (cdf->objidlen == prkdf->objidlen + && !memcmp (cdf->objid, prkdf->objid, prkdf->objidlen)) + break; + if (!cdf) + for (cdf = app->app_local->useful_certificate_info; cdf; cdf = cdf->next) + if (cdf->objidlen == prkdf->objidlen + && !memcmp (cdf->objid, prkdf->objid, prkdf->objidlen)) + break; + if (!cdf) + return gpg_error (GPG_ERR_NOT_FOUND); + + err = readcert_by_cdf (app, cdf, &der, &derlen); if (err) return err; + err = ksba_cert_new (&cert); + if (!err) + err = ksba_cert_init_from_mem (cert, der, derlen); + xfree (der); + if (!err) + err = app_help_get_keygrip_string (cert, r_gripstr); + ksba_cert_release (cert); + + return err; } -static int -do_learn_status (APP app, CTRL ctrl) + + +/* Helper to do_learn_status: Send information about all known + keypairs back. FIXME: much code duplication from + send_sertinfo(). */ +static gpg_error_t +send_keypairinfo (app_t app, ctrl_t ctrl, prkdf_object_t keyinfo) { gpg_error_t err; - char ct_buf[100], id_buf[100]; + + for (; keyinfo; keyinfo = keyinfo->next) + { + char gripstr[40+1]; + char *buf, *p; + int i, j; + + buf = xtrymalloc (9 + keyinfo->objidlen*2 + 1); + if (!buf) + return gpg_error_from_errno (errno); + p = stpcpy (buf, "P15"); + if (app->app_local->home_df) + { + sprintf (p, "-%04hX", (app->app_local->home_df & 0xffff)); + p += 5; + } + p = stpcpy (p, "."); + for (i=0; i < keyinfo->objidlen; i++) + { + sprintf (p, "%02X", keyinfo->objid[i]); + p += 2; + } + + err = keygripstr_from_prkdf (app, keyinfo, gripstr); + if (err) + { + log_error ("can't get keygrip from "); + for (j=0; j < keyinfo->pathlen; j++) + log_printf ("%04hX", keyinfo->path[j]); + log_printf (": %s\n", gpg_strerror (err)); + } + else + { + assert (strlen (gripstr) == 40); + send_status_info (ctrl, "KEYPAIRINFO", + gripstr, 40, + buf, strlen (buf), + NULL, (size_t)0); + } + xfree (buf); + } + return 0; +} + + + +/* This is the handler for the LEARN command. */ +static int /* FIXME: change this to gpg_error_t */ +do_learn_status (app_t app, ctrl_t ctrl) +{ + gpg_error_t err; + + err = send_certinfo (app, ctrl, "100", app->app_local->certificate_info); + if (!err) + err = send_certinfo (app, ctrl, "101", + app->app_local->trusted_certificate_info); + if (!err) + err = send_certinfo (app, ctrl, "102", + app->app_local->useful_certificate_info); + if (!err) + err = send_keypairinfo (app, ctrl, app->app_local->private_key_info); + + return err; +} + + +/* Read a certifciate using the information in CDF and return the + certificate in a newly llocated buffer R_CERT and its length + R_CERTLEN. */ +static gpg_error_t +readcert_by_cdf (app_t app, cdf_object_t cdf, + unsigned char **r_cert, size_t *r_certlen) +{ + gpg_error_t err; + unsigned char *buffer = NULL; + const unsigned char *p, *save_p; + size_t buflen, n; + int class, tag, constructed, ndef; + size_t totobjlen, objlen, hdrlen; + int rootca; int i; - /* Output information about all useful objects. */ - for (i=0; objlist[i].fid; i++) + *r_cert = NULL; + *r_certlen = 0; + + /* First check whether it has been cached. */ + if (cdf->image) + { + *r_cert = xtrymalloc (cdf->imagelen); + if (!*r_cert) + return gpg_error_from_errno (errno); + memcpy (*r_cert, cdf->image, cdf->imagelen); + *r_certlen = cdf->imagelen; + return 0; + } + + /* Read the entire file. fixme: This could be optimized by first + reading the header to figure out how long the certificate + actually is. */ + err = select_ef_by_path (app, cdf->path, cdf->pathlen); + if (err) + goto leave; + + err = iso7816_read_binary (app->slot, cdf->off, cdf->len, &buffer, &buflen); + if (!err && (!buflen || *buffer == 0xff)) + err = gpg_error (GPG_ERR_NOT_FOUND); + if (err) { - if (filelist[i].certtype) + log_error ("error reading certificate with Id "); + for (i=0; i < cdf->objidlen; i++) + log_printf ("%02X", cdf->objid[i]); + log_printf (": %s\n", gpg_strerror (err)); + goto leave; + } + + /* Check whether this is really a certificate. */ + p = buffer; + n = buflen; + err = parse_ber_header (&p, &n, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (err) + goto leave; + + if (class == CLASS_UNIVERSAL && tag == TAG_SEQUENCE && constructed) + rootca = 0; + else if ( class == CLASS_UNIVERSAL && tag == TAG_SET && constructed ) + rootca = 1; + else + { + err = gpg_error (GPG_ERR_INV_OBJ); + goto leave; + } + totobjlen = objlen + hdrlen; + assert (totobjlen <= buflen); + + err = parse_ber_header (&p, &n, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (err) + goto leave; + + if (!rootca + && class == CLASS_UNIVERSAL && tag == TAG_OBJECT_ID && !constructed) + { + /* The certificate seems to be contained in a userCertificate + container. Skip this and assume the following sequence is + the certificate. */ + if (n < objlen) { - size_t len; + err = gpg_error (GPG_ERR_INV_OBJ); + goto leave; + } + p += objlen; + n -= objlen; + save_p = p; + err = parse_ber_header (&p, &n, &class, &tag, &constructed, + &ndef, &objlen, &hdrlen); + if (err) + goto leave; + if ( !(class == CLASS_UNIVERSAL && tag == TAG_SEQUENCE && constructed) ) + { + err = gpg_error (GPG_ERR_INV_OBJ); + goto leave; + } + totobjlen = objlen + hdrlen; + assert (save_p + totobjlen <= buffer + buflen); + memmove (buffer, save_p, totobjlen); + } + + *r_cert = buffer; + buffer = NULL; + *r_certlen = totobjlen; + + /* Try to cache it. */ + if (!cdf->image && (cdf->image = xtrymalloc (*r_certlen))) + { + memcpy (cdf->image, *r_cert, *r_certlen); + cdf->imagelen = *r_certlen; + } + + + leave: + xfree (buffer); + return err; +} - len = app_help_read_length_of_cert (app->slot, - filelist[i].fid, NULL); - if (len) + + +/* Handler for the READCERT command. + + Read the certificate with id CERTID (as returned by learn_status in + the CERTINFO status lines) and return it in the freshly allocated + buffer to be stored at R_CERT and its length at R_CERTLEN. A error + code will be returned on failure and R_CERT and R_CERTLEN will be + set to NULL/0. */ +static int /* FIXME: change this to gpg_error_t */ +do_readcert (app_t app, const char *certid, + unsigned char **r_cert, size_t *r_certlen) +{ + gpg_error_t err; + cdf_object_t cdf; + + *r_cert = NULL; + *r_certlen = 0; + err = cdf_object_from_certid (app, certid, &cdf); + if (!err) + err =readcert_by_cdf (app, cdf, r_cert, r_certlen); + return err; +} + + + +/* Handler for the PKSIGN command. + + Create the signature and return the allocated result in OUTDATA. + If a PIN is required, the PINCB will be used to ask for the PIN; + that callback should return the PIN in an allocated buffer and + store that as the 3rd argument. */ +static int +do_sign (app_t app, const char *keyidstr, int hashalgo, + int (pincb)(void*, const char *, char **), + void *pincb_arg, + const void *indata, size_t indatalen, + unsigned char **outdata, size_t *outdatalen ) +{ + static unsigned char sha1_prefix[15] = /* Object ID is 1.3.14.3.2.26 */ + { 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x0e, 0x03, + 0x02, 0x1a, 0x05, 0x00, 0x04, 0x14 }; + static unsigned char rmd160_prefix[15] = /* Object ID is 1.3.36.3.2.1 */ + { 0x30, 0x21, 0x30, 0x09, 0x06, 0x05, 0x2b, 0x24, 0x03, + 0x02, 0x01, 0x05, 0x00, 0x04, 0x14 }; + + gpg_error_t err; + int i; + unsigned char data[35]; /* Must be large enough for a SHA-1 digest + + the largest OID prefix above. */ + prkdf_object_t prkdf; /* The private key object. */ + aodf_object_t aodf; /* The associated authentication object. */ + + if (!keyidstr || !*keyidstr) + return gpg_error (GPG_ERR_INV_VALUE); + if (indatalen != 20 && indatalen != 16 && indatalen != 35) + return gpg_error (GPG_ERR_INV_VALUE); + + err = prkdf_object_from_keyidstr (app, keyidstr, &prkdf); + if (err) + return err; + if (!prkdf->authid) + { + log_error ("no authentication object defined for %s\n", keyidstr); + /* fixme: we might want to go ahead and do without PIN + verification. */ + return gpg_error (GPG_ERR_UNSUPPORTED_OPERATION); + } + + /* Find the authentication object to this private key object. */ + for (aodf = app->app_local->auth_object_info; aodf; aodf = aodf->next) + if (aodf->objidlen == prkdf->authidlen + && !memcmp (aodf->objid, prkdf->authid, prkdf->authidlen)) + break; + if (!aodf) + { + log_error ("authentication object for %s missing\n", keyidstr); + return gpg_error (GPG_ERR_INV_CARD); + } + if (aodf->authid) + { + log_error ("PIN verification is protected by an " + "additional authentication token\n"); + return gpg_error (GPG_ERR_BAD_PIN_METHOD); + } + if (aodf->pinflags.integrity_protected + || aodf->pinflags.confidentiality_protected) + { + log_error ("PIN verification requires unsupported protecion method\n"); + return gpg_error (GPG_ERR_BAD_PIN_METHOD); + } + if (!aodf->stored_length && aodf->pinflags.needs_padding) + { + log_error ("PIN verification requires padding but no length known\n"); + return gpg_error (GPG_ERR_INV_CARD); + } + + /* Now that we have all the information available, prepare and run + the PIN verification.*/ + if (1) + { + char *pinvalue; + size_t pinvaluelen; + const char *errstr; + const char *s; + + err = pincb (pincb_arg, "PIN", &pinvalue); + if (err) + { + log_info ("PIN callback returned error: %s\n", gpg_strerror (err)); + return err; + } + + /* We might need to cope with UTF8 things here. Not sure how + min_length etc. are exactly defined, for now we take them as + a plain octet count. */ + + if (strlen (pinvalue) < aodf->min_length) + { + log_error ("PIN is too short; minimum length is %lu\n", + aodf->min_length); + err = gpg_error (GPG_ERR_BAD_PIN); + } + else if (aodf->stored_length && strlen (pinvalue) > aodf->stored_length) + { + /* This would otherwise truncate the PIN silently. */ + log_error ("PIN is too large; maximum length is %lu\n", + aodf->stored_length); + err = gpg_error (GPG_ERR_BAD_PIN); + } + else if (aodf->max_length_valid && strlen (pinvalue) > aodf->max_length) + { + log_error ("PIN is too large; maximum length is %lu\n", + aodf->max_length); + err = gpg_error (GPG_ERR_BAD_PIN); + } + + if (err) + { + xfree (pinvalue); + return err; + } + + errstr = NULL; + err = 0; + switch (aodf->pintype) + { + case PIN_TYPE_BCD: + errstr = "PIN type BCD is not supported"; + break; + case PIN_TYPE_ASCII_NUMERIC: + for (s=pinvalue; digitp (s); s++) + ; + if (*s) { - /* FIXME: We should store the length in the application's - context so that a following readcert does only need to - read that many bytes. */ - sprintf (ct_buf, "%d", filelist[i].certtype); - sprintf (id_buf, "P15-DF01.%04X", filelist[i].fid); - send_status_info (ctrl, "CERTINFO", - ct_buf, strlen (ct_buf), - id_buf, strlen (id_buf), - NULL, (size_t)0); + errstr = "Non-numeric digits found in PIN"; + err = gpg_error (GPG_ERR_BAD_PIN); } + break; + case PIN_TYPE_UTF8: + break; + case PIN_TYPE_HALF_NIBBLE_BCD: + errstr = "PIN type Half-Nibble-BCD is not supported"; + break; + case PIN_TYPE_ISO9564_1: + errstr = "PIN type ISO9564-1 is not supported"; + break; + default: + errstr = "Unknown PIN type"; + break; } - else if (filelist[i].iskeypair) + if (errstr) { - char gripstr[40+1]; + log_error ("can't verify PIN: %s\n", errstr); + xfree (pinvalue); + return err? err : gpg_error (GPG_ERR_BAD_PIN_METHOD); + } - err = keygripstr_from_pk_file (app->slot, filelist[i].fid, gripstr); - if (err) - log_error ("can't get keygrip from FID 0x%04X: %s\n", - filelist[i].fid, gpg_strerror (err)); - else + if (aodf->pinflags.needs_padding) + { + char *paddedpin; + + paddedpin = xtrymalloc (aodf->stored_length+1); + if (!paddedpin) { - sprintf (id_buf, "P15-DF01.%04X", filelist[i].fid); - send_status_info (ctrl, "KEYPAIRINFO", - gripstr, 40, - id_buf, strlen (id_buf), - NULL, (size_t)0); + err = gpg_error_from_errno (errno); + xfree (pinvalue); + return err; } + for (i=0, s=pinvalue; i < aodf->stored_length && *s; i++, s++) + paddedpin[i] = *s; + /* Not sure what padding char to use if none has been set. + For now we use 0x00; maybe a space would be better. */ + for (; i < aodf->stored_length; i++) + paddedpin[i] = aodf->pad_char_valid? aodf->pad_char : 0; + paddedpin[i] = 0; + pinvaluelen = i; + xfree (pinvalue); + pinvalue = paddedpin; + } + else + pinvaluelen = strlen (pinvalue); + + err = iso7816_verify (app->slot, + aodf->pin_reference_valid? aodf->pin_reference : 0, + pinvalue, pinvaluelen); + xfree (pinvalue); + if (err) + { + log_error ("PIN verification failed: %s\n", gpg_strerror (err)); + return err; } + log_debug ("PIN verification succeeded\n"); } - return 0; -} + /* Prepare the DER object from INDATA. */ + if (indatalen == 35) + { + /* Alright, the caller was so kind to send us an already + prepared DER object. Check that it is what we want and that + it matches the hash algorithm. */ + if (hashalgo == GCRY_MD_SHA1 && !memcmp (indata, sha1_prefix, 15)) + ; + else if (hashalgo == GCRY_MD_RMD160 + && !memcmp (indata, rmd160_prefix, 15)) + ; + else + return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM); + memcpy (data, indata, indatalen); + } + else + { + /* Need to prepend the prefix. */ + if (hashalgo == GCRY_MD_SHA1) + memcpy (data, sha1_prefix, 15); + else if (hashalgo == GCRY_MD_RMD160) + memcpy (data, rmd160_prefix, 15); + else + return gpg_error (GPG_ERR_UNSUPPORTED_ALGORITHM); + memcpy (data+15, indata, indatalen); + } + + /* Manage security environment needs to be weaked for certain cards. */ + if (app->app_local->card_type == CARD_TYPE_TCOS) + { + /* TCOS creates signatures always using the local key 0. MSE + may not be used. */ + } + else if (app->app_local->card_type == CARD_TYPE_MICARDO) + { + /* Micardo cards are very special in that they need to restore a + security environment using a infomration from a special + file. */ + log_error ("WARNING: support for MICARDO cards is not yet available\n"); + } + else if (prkdf->key_reference_valid) + { + unsigned char mse[3]; + + mse[0] = 0x84; /* Select asym. key. */ + mse[1] = 1; + mse[2] = prkdf->key_reference; + err = iso7816_manage_security_env (app->slot, + 0x41, 0xB6, + mse, sizeof mse); + if (err) + { + log_error ("MSE failed: %s\n", gpg_strerror (err)); + return err; + } + } -/* Release all resources. */ -static void -do_deinit (app_t app) -{ - if (app && app->app_local) - { - xfree (app->app_local); - app->app_local = NULL; - } + err = iso7816_compute_ds (app->slot, data, 35, outdata, outdatalen); + return err; } + + + + + /* Select the PKCS#15 application on the card in SLOT. */ -int -app_select_p15 (APP app) +gpg_error_t +app_select_p15 (app_t app) { static char const aid[] = { 0xA0, 0, 0, 0, 0x63, 0x50, 0x4B, 0x43, 0x53, 0x2D, 0x31, 0x35 }; int slot = app->slot; int rc; + unsigned short def_home_df = 0; + card_type_t card_type = CARD_TYPE_UNKNOWN; rc = iso7816_select_application (slot, aid, sizeof aid); + if (rc) + { + def_home_df = 0x5015; + rc = iso7816_select_file (slot, def_home_df, 1, NULL, NULL); + } + if (!rc) + { + /* We need to know the ATR for tweaking some security operations. */ + unsigned char *atr; + size_t atrlen; + int i; + + atr = apdu_get_atr (app->slot, &atrlen); + if (!atr) + rc = gpg_error (GPG_ERR_INV_CARD); + else + { + for (i=0; card_atr_list[i].atrlen; i++) + if (card_atr_list[i].atrlen == atrlen + && !memcmp (card_atr_list[i].atr, atr, atrlen)) + { + card_type = card_atr_list[i].type; + break; + } + xfree (atr); + } + } if (!rc) { app->apptype = "P15"; @@ -631,37 +2835,49 @@ app_select_p15 (APP app) goto leave; } + /* Set the home DF. Note that we currently can't do that if the + selection via application ID worked. This will store 0 there + instead. FIXME: We either need to figure the home_df via the + DIR file or using the return values from the select file + APDU. */ + app->app_local->home_df = def_home_df; + + /* Store the card type. FIXME: We might want to put this into + the common APP structure. */ + app->app_local->card_type = card_type; + /* Read basic information and check whether this is a real card. */ rc = read_p15_info (app); - - /* Special serial number munging. We need to do one case here - because we need to access the EF(TokenInfo). */ + if (rc) + goto leave; + + /* Special serial number munging. We need to check for a German + prototype card right here because we need to access to + EF(TokenInfo). We mark such a serial number by the using a + prefix of FF0100. */ if (app->serialnolen == 12 - && !memcmp (app->serial, "\xD2\x76\0\0\0\0\0\0\0\0\0\0", 12)) + && !memcmp (app->serialno, "\xD2\x76\0\0\0\0\0\0\0\0\0\0", 12)) { /* This is a German card with a silly serial number. Try to get - the serial number from the EF(TokenInfo). We indicate such a - serial number by the using the prefix: "FF0100". */ - const char *efser = card->p15card->serial_number; - char *p; - - if (!efser) - efser = ""; + the serial number from the EF(TokenInfo). . */ + unsigned char *p; + + /* FIXME: actually get it from EF(TokenInfo). */ - xfree (*serial); - *serial = NULL; - p = xtrymalloc (strlen (efser) + 7); + p = xtrymalloc (3 + app->serialnolen); if (!p) rc = gpg_error (gpg_err_code_from_errno (errno)); else { - strcpy (p, "FF0100"); - strcpy (p+6, efser); - *serial = p; + memcpy (p, "\xff\x01", 3); + memcpy (p+3, app->serialno, app->serialnolen); + app->serialnolen += 3; + xfree (app->serialno); + app->serialno = p; } } - else + else /* Use standard munging code. */ rc = app_munge_serialno (app); app->fnc.deinit = do_deinit; @@ -672,17 +2888,13 @@ app_select_p15 (APP app) app->fnc.genkey = NULL; app->fnc.sign = do_sign; app->fnc.auth = NULL; - app->fnc.decipher = do_decipher; + app->fnc.decipher = NULL; app->fnc.change_pin = NULL; app->fnc.check_pin = NULL; leave: if (rc) - { - xfree (app->app_local); - app->app_local = NULL; - } - + do_deinit (app); } return rc; |