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pki: Add pki_do_sign().

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This commit is contained in:
Andreas Schneider
2011-08-07 18:22:19 +02:00
parent 38d00c0e7a
commit f81444bd57
5 changed files with 125 additions and 91 deletions
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43
src/pki_gcrypt.c
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@@ -856,6 +856,49 @@ fail:
return NULL;
}
struct signature_struct *pki_do_sign(ssh_key privatekey,
const unsigned char *hash) {
struct signature_struct *sign;
gcry_sexp_t gcryhash;
sign = malloc(sizeof(SIGNATURE));
if (sign == NULL) {
return NULL;
}
sign->type = privatekey->type;
switch(privatekey->type) {
case SSH_KEYTYPE_DSS:
if (gcry_sexp_build(&gcryhash, NULL, "%b", SHA_DIGEST_LEN + 1, hash) ||
gcry_pk_sign(&sign->dsa_sign, gcryhash, privatekey->dsa)) {
gcry_sexp_release(gcryhash);
signature_free(sign);
return NULL;
}
sign->rsa_sign = NULL;
break;
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
if (gcry_sexp_build(&gcryhash, NULL, "(data(flags pkcs1)(hash sha1 %b))",
SHA_DIGEST_LEN, hash + 1) ||
gcry_pk_sign(&sign->rsa_sign, gcryhash, privatekey->rsa)) {
gcry_sexp_release(gcryhash);
signature_free(sign);
return NULL;
}
sign->dsa_sign = NULL;
break;
case SSH_KEYTYPE_ECDSA:
case SSH_KEYTYPE_UNKNOWN:
signature_free(sign);
return NULL;
}
gcry_sexp_release(gcryhash);
return sign;
}
#endif /* HAVE_LIBGCRYPT */
/**