diff options
Diffstat (limited to 'scd/app-help.c')
| -rw-r--r-- | scd/app-help.c | 45 |
1 files changed, 42 insertions, 3 deletions
diff --git a/scd/app-help.c b/scd/app-help.c index 842a73d5a..f0f551c55 100644 --- a/scd/app-help.c +++ b/scd/app-help.c @@ -29,9 +29,9 @@ #include "../common/tlv.h" -/* Count the number of bits, assuming the A represents an unsigned big - integer of length LEN bytes. If A is NULL a length of 0 is - returned. */ +/* Count the number of bits, assuming that A represents an unsigned + * big integer of length LEN bytes. If A is NULL a length of 0 is + * returned. */ unsigned int app_help_count_bits (const unsigned char *a, size_t len) { @@ -87,6 +87,45 @@ app_help_get_keygrip_string (ksba_cert_t cert, char *hexkeygrip) } +gpg_error_t +app_help_pubkey_from_cert (const void *cert, size_t certlen, + unsigned char **r_pk, size_t *r_pklen) +{ + gpg_error_t err; + ksba_cert_t kc; + unsigned char *pk; + size_t pklen; + + *r_pk = NULL; + *r_pklen = 0; + + err = ksba_cert_new (&kc); + if (err) + return err; + + err = ksba_cert_init_from_mem (kc, cert, certlen); + if (err) + goto leave; + + pk = ksba_cert_get_public_key (kc); + if (!pk) + { + err = gpg_error (GPG_ERR_NO_PUBKEY); + goto leave; + } + pklen = gcry_sexp_canon_len (pk, 0, NULL, &err); + + leave: + if (!err) + { + *r_pk = pk; + *r_pklen = pklen; + } + else + ksba_free (pk); + ksba_cert_release (kc); + return err; +} /* Given the SLOT and the File ID FID, return the length of the certificate contained in that file. Returns 0 if the file does not |