diff options
Diffstat (limited to 'kbx/keybox-search.c')
| -rw-r--r-- | kbx/keybox-search.c | 116 |
1 files changed, 115 insertions, 1 deletions
diff --git a/kbx/keybox-search.c b/kbx/keybox-search.c index b8add5abe..f23bfdada 100644 --- a/kbx/keybox-search.c +++ b/kbx/keybox-search.c @@ -1,5 +1,5 @@ /* keybox-search.c - Search operations - * Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc. + * Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc. * * This file is part of GnuPG. * @@ -26,12 +26,15 @@ #include <errno.h> #include "../jnlib/stringhelp.h" /* ascii_xxxx() */ + #include "keybox-defs.h" + #define xtoi_1(p) (*(p) <= '9'? (*(p)- '0'): \ *(p) <= 'F'? (*(p)-'A'+10):(*(p)-'a'+10)) #define xtoi_2(p) ((xtoi_1(p) * 16) + xtoi_1((p)+1)) + struct sn_array_s { int snlen; unsigned char *sn; @@ -88,6 +91,97 @@ blob_get_blob_flags (KEYBOXBLOB blob) } +/* Return information on the flag WHAT within the blob BUFFER,LENGTH. + Return the offset and the length (in bytes) of the flag in + FLAGOFF,FLAG_SIZE. */ +gpg_err_code_t +_keybox_get_flag_location (const unsigned char *buffer, size_t length, + int what, size_t *flag_off, size_t *flag_size) +{ + size_t pos; + size_t nkeys, keyinfolen; + size_t nuids, uidinfolen; + size_t nserial; + size_t nsigs, siginfolen; + + switch (what) + { + case KEYBOX_FLAG_BLOB: + if (length < 8) + return GPG_ERR_INV_OBJ; + *flag_off = 6; + *flag_size = 2; + break; + + case KEYBOX_FLAG_VALIDITY: + case KEYBOX_FLAG_OWNERTRUST: + if (length < 20) + return GPG_ERR_INV_OBJ; + /* Key info. */ + nkeys = get16 (buffer + 16); + keyinfolen = get16 (buffer + 18 ); + if (keyinfolen < 28) + return GPG_ERR_INV_OBJ; + pos = 20 + keyinfolen*nkeys; + if (pos+2 > length) + return GPG_ERR_INV_OBJ; /* Out of bounds. */ + /* Serial number. */ + nserial = get16 (buffer+pos); + pos += 2 + nserial; + if (pos+4 > length) + return GPG_ERR_INV_OBJ; /* Out of bounds. */ + /* User IDs. */ + nuids = get16 (buffer + pos); pos += 2; + uidinfolen = get16 (buffer + pos); pos += 2; + if (uidinfolen < 12 ) + return GPG_ERR_INV_OBJ; + pos += uidinfolen*nuids; + if (pos+4 > length) + return GPG_ERR_INV_OBJ ; /* Out of bounds. */ + /* Signature info. */ + nsigs = get16 (buffer + pos); pos += 2; + siginfolen = get16 (buffer + pos); pos += 2; + if (siginfolen < 4 ) + return GPG_ERR_INV_OBJ; + pos += siginfolen*nsigs; + if (pos+1+1+2+4+4+4+4 > length) + return GPG_ERR_INV_OBJ ; /* Out of bounds. */ + *flag_size = 1; + *flag_off = pos; + if (what == KEYBOX_FLAG_VALIDITY) + ++*flag_off; + break; + + default: + return GPG_ERR_INV_FLAG; + } + return 0; +} + +/* Return one of the flags WHAT in VALUE from teh blob BUFFER of + LENGTH bytes. Return 0 on success or an raw error code. */ +static gpg_err_code_t +get_flag_from_image (const unsigned char *buffer, size_t length, + int what, unsigned int *value) +{ + gpg_err_code_t ec; + size_t pos, size; + + *value = 0; + ec = _keybox_get_flag_location (buffer, length, what, &pos, &size); + if (!ec) + switch (size) + { + case 1: *value = buffer[pos]; break; + case 2: *value = get16 (buffer + pos); break; + case 4: *value = get32 (buffer + pos); break; + default: ec = GPG_ERR_BUG; break; + } + + return ec; +} + + static int blob_cmp_sn (KEYBOXBLOB blob, const unsigned char *sn, int snlen) { @@ -811,3 +905,23 @@ keybox_get_cert (KEYBOX_HANDLE hd, ksba_cert_t *r_cert) } #endif /*KEYBOX_WITH_X509*/ + +/* Return the flags named WHAT iat the address of VALUE. IDX is used + only for certain flags and should be 0 if not required. */ +int +keybox_get_flags (KEYBOX_HANDLE hd, int what, int idx, unsigned int *value) +{ + const unsigned char *buffer; + size_t length; + gpg_err_code_t ec; + + if (!hd) + return gpg_error (GPG_ERR_INV_VALUE); + if (!hd->found.blob) + return gpg_error (GPG_ERR_NOTHING_FOUND); + + buffer = _keybox_get_blob_image (hd->found.blob, &length); + ec = get_flag_from_image (buffer, length, what, value); + return ec? gpg_error (ec):0; +} + |