/* Extracts DSA and RSA parameters from a certificate. */ int _gnutls_x509_crq_get_mpis (gnutls_x509_crq_t cert, bigint_t * params, int *params_size) { /* Read the algorithm's OID */ return _gnutls_get_asn_mpis (cert->crq, "certificationRequestInfo.subjectPKInfo", params, params_size); }
/* Extracts DSA and RSA parameters from a certificate. */ int _gnutls_x509_crt_get_mpis (gnutls_x509_crt_t cert, bigint_t * params, int *params_size) { /* Read the algorithm's OID */ return _gnutls_get_asn_mpis (cert->cert, "tbsCertificate.subjectPublicKeyInfo", params, params_size); }
/* Reads and returns the PK algorithm of the given certificate-like * ASN.1 structure. src_name should be something like "tbsCertificate.subjectPublicKeyInfo". */ int _gnutls_x509_get_pk_algorithm (ASN1_TYPE src, const char *src_name, unsigned int *bits) { int result; int algo; char oid[64]; int len; gnutls_pk_params_st params; char name[128]; gnutls_pk_params_init(¶ms); _asnstr_append_name (name, sizeof (name), src_name, ".algorithm.algorithm"); len = sizeof (oid); result = asn1_read_value (src, name, oid, &len); if (result != ASN1_SUCCESS) { gnutls_assert (); return _gnutls_asn2err (result); } algo = _gnutls_x509_oid2pk_algorithm (oid); if (algo == GNUTLS_PK_UNKNOWN) { _gnutls_debug_log ("%s: unknown public key algorithm: %s\n", __func__, oid); } if (bits == NULL) { return algo; } /* Now read the parameters' bits */ result = _gnutls_get_asn_mpis(src, src_name, ¶ms); if (result < 0) return gnutls_assert_val(result); bits[0] = pubkey_to_bits(algo, ¶ms); gnutls_pk_params_release(¶ms); return algo; }