static int
parse_x509_cert(sc_context_t *ctx, struct sc_pkcs15_der *der, struct sc_pkcs15_cert *cert)
{
int r;
struct sc_algorithm_id sig_alg;
struct sc_pkcs15_pubkey *pubkey = NULL;
unsigned char *serial = NULL, *issuer = NULL, *subject = NULL, *buf = der->value;
size_t serial_len = 0, issuer_len = 0, subject_len = 0, data_len = 0, buflen = der->len;
struct sc_asn1_entry asn1_version[] = {
{ "version", SC_ASN1_INTEGER, SC_ASN1_TAG_INTEGER, 0, &cert->version, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_x509v3[] = {
{ "certificatePolicies", SC_ASN1_OCTET_STRING, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, NULL, NULL },
{ "subjectKeyIdentifier", SC_ASN1_OCTET_STRING, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, NULL, NULL },
{ "crlDistributionPoints", SC_ASN1_OCTET_STRING, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL | SC_ASN1_ALLOC, &cert->crl, &cert->crl_len },
{ "authorityKeyIdentifier", SC_ASN1_OCTET_STRING, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, NULL, NULL },
{ "keyUsage", SC_ASN1_BOOLEAN, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_extensions[] = {
{ "x509v3", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, asn1_x509v3, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_tbscert[] = {
{ "version", SC_ASN1_STRUCT, SC_ASN1_CTX | 0 | SC_ASN1_CONS, SC_ASN1_OPTIONAL, asn1_version, NULL },
{ "serialNumber", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_INTEGER, SC_ASN1_ALLOC, &serial, &serial_len },
{ "signature", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ "issuer", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_ALLOC, &issuer, &issuer_len },
{ "validity", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ "subject", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_ALLOC, &subject, &subject_len },
/* Use a callback to get the algorithm, parameters and pubkey into sc_pkcs15_pubkey */
{ "subjectPublicKeyInfo",SC_ASN1_CALLBACK, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, sc_pkcs15_pubkey_from_spki, &pubkey },
{ "extensions", SC_ASN1_STRUCT, SC_ASN1_CTX | 3 | SC_ASN1_CONS, SC_ASN1_OPTIONAL, asn1_extensions, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_cert[] = {
{ "tbsCertificate", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, asn1_tbscert, NULL },
{ "signatureAlgorithm", SC_ASN1_ALGORITHM_ID, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, &sig_alg, NULL },
{ "signatureValue", SC_ASN1_BIT_STRING, SC_ASN1_TAG_BIT_STRING, 0, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_serial_number[] = {
{ "serialNumber", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_INTEGER, SC_ASN1_ALLOC, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_subject[] = {
{ "subject", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_ALLOC, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_issuer[] = {
{ "issuer", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_ALLOC, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
const u8 *obj;
size_t objlen;
memset(cert, 0, sizeof(*cert));
obj = sc_asn1_verify_tag(ctx, buf, buflen, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, &objlen);
if (obj == NULL)
LOG_TEST_RET(ctx, SC_ERROR_INVALID_ASN1_OBJECT, "X.509 certificate not found");
data_len = objlen + (obj - buf);
cert->data.value = malloc(data_len);
if (!cert->data.value)
LOG_FUNC_RETURN(ctx, SC_ERROR_OUT_OF_MEMORY);
memcpy(cert->data.value, buf, data_len);
cert->data.len = data_len;
r = sc_asn1_decode(ctx, asn1_cert, obj, objlen, NULL, NULL);
LOG_TEST_RET(ctx, r, "ASN.1 parsing of certificate failed");
cert->version++;
if (!pubkey)
LOG_TEST_RET(ctx, SC_ERROR_INVALID_ASN1_OBJECT, "Unable to decode subjectPublicKeyInfo from cert");
cert->key = pubkey;
sc_asn1_clear_algorithm_id(&sig_alg);
if (serial && serial_len) {
sc_format_asn1_entry(asn1_serial_number + 0, serial, &serial_len, 1);
r = sc_asn1_encode(ctx, asn1_serial_number, &cert->serial, &cert->serial_len);
free(serial);
LOG_TEST_RET(ctx, r, "ASN.1 encoding of serial failed");
}
if (subject && subject_len) {
sc_format_asn1_entry(asn1_subject + 0, subject, &subject_len, 1);
r = sc_asn1_encode(ctx, asn1_subject, &cert->subject, &cert->subject_len);
free(subject);
LOG_TEST_RET(ctx, r, "ASN.1 encoding of subject");
}
if (issuer && issuer_len) {
sc_format_asn1_entry(asn1_issuer + 0, issuer, &issuer_len, 1);
r = sc_asn1_encode(ctx, asn1_issuer, &cert->issuer, &cert->issuer_len);
free(issuer);
LOG_TEST_RET(ctx, r, "ASN.1 encoding of issuer");
}
return SC_SUCCESS;
}
static int parse_x509_cert(sc_context_t *ctx, const u8 *buf, size_t buflen, struct sc_pkcs15_cert *cert)
{
int r;
struct sc_algorithm_id sig_alg;
struct sc_pkcs15_pubkey * pubkey = NULL;
u8 *serial = NULL;
size_t serial_len = 0;
struct sc_asn1_entry asn1_version[] = {
{ "version", SC_ASN1_INTEGER, SC_ASN1_TAG_INTEGER, 0, &cert->version, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_x509v3[] = {
{ "certificatePolicies", SC_ASN1_OCTET_STRING, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, NULL, NULL },
{ "subjectKeyIdentifier", SC_ASN1_OCTET_STRING, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, NULL, NULL },
{ "crlDistributionPoints", SC_ASN1_OCTET_STRING, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL | SC_ASN1_ALLOC, &cert->crl, &cert->crl_len },
{ "authorityKeyIdentifier", SC_ASN1_OCTET_STRING, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, NULL, NULL },
{ "keyUsage", SC_ASN1_BOOLEAN, SC_ASN1_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_extensions[] = {
{ "x509v3", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_OPTIONAL, asn1_x509v3, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_tbscert[] = {
{ "version", SC_ASN1_STRUCT, SC_ASN1_CTX | 0 | SC_ASN1_CONS, SC_ASN1_OPTIONAL, asn1_version, NULL },
{ "serialNumber", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_INTEGER, SC_ASN1_ALLOC, &serial, &serial_len },
{ "signature", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ "issuer", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_ALLOC, &cert->issuer, &cert->issuer_len },
{ "validity", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, NULL, NULL },
{ "subject", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, SC_ASN1_ALLOC, &cert->subject, &cert->subject_len },
/* Use a callback to get the algorithm, parameters and pubkey into sc_pkcs15_pubkey */
{ "subjectPublicKeyInfo",SC_ASN1_CALLBACK, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, sc_pkcs15_pubkey_from_spki, &pubkey },
{ "extensions", SC_ASN1_STRUCT, SC_ASN1_CTX | 3 | SC_ASN1_CONS, SC_ASN1_OPTIONAL, asn1_extensions, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_cert[] = {
{ "tbsCertificate", SC_ASN1_STRUCT, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, asn1_tbscert, NULL },
{ "signatureAlgorithm", SC_ASN1_ALGORITHM_ID, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS, 0, &sig_alg, NULL },
{ "signatureValue", SC_ASN1_BIT_STRING, SC_ASN1_TAG_BIT_STRING, 0, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
struct sc_asn1_entry asn1_serial_number[] = {
{ "serialNumber", SC_ASN1_OCTET_STRING, SC_ASN1_TAG_INTEGER, SC_ASN1_ALLOC, NULL, NULL },
{ NULL, 0, 0, 0, NULL, NULL }
};
const u8 *obj;
size_t objlen;
memset(cert, 0, sizeof(*cert));
obj = sc_asn1_verify_tag(ctx, buf, buflen, SC_ASN1_TAG_SEQUENCE | SC_ASN1_CONS,
&objlen);
if (obj == NULL) {
sc_debug(ctx, SC_LOG_DEBUG_NORMAL, "X.509 certificate not found");
return SC_ERROR_INVALID_ASN1_OBJECT;
}
cert->data_len = objlen + (obj - buf);
r = sc_asn1_decode(ctx, asn1_cert, obj, objlen, NULL, NULL);
SC_TEST_RET(ctx, SC_LOG_DEBUG_NORMAL, r, "ASN.1 parsing of certificate failed");
cert->version++;
if (pubkey) {
cert->key = pubkey;
pubkey = NULL;
} else {
sc_debug(ctx,SC_LOG_DEBUG_VERBOSE, "Unable to decode subjectPublicKeyInfo from cert");
r = SC_ERROR_INVALID_ASN1_OBJECT;
}
sc_asn1_clear_algorithm_id(&sig_alg);
if (r < 0)
return r;
if (serial && serial_len) {
sc_format_asn1_entry(asn1_serial_number + 0, serial, &serial_len, 1);
r = sc_asn1_encode(ctx, asn1_serial_number, &cert->serial, &cert->serial_len);
free(serial);
}
return r;
}
