Introduce new helper functions to extract certificate metadata needed for
DIAG 320 subcode 2:
qcrypto_x509_check_cert_times() - validates the certificate's validity period
against the current time
qcrypto_x509_get_pk_algorithm() - returns the public key algorithm used in the
certificate
qcrypto_x509_get_cert_key_id() - extracts the key ID from the certificate
These functions provide support for metadata extraction and validity checking
for X.509 certificates.
Signed-off-by: Zhuoying Cai <zy...@linux.ibm.com>
---
crypto/x509-utils.c | 174 ++++++++++++++++++++++++++++++++++++
include/crypto/x509-utils.h | 58 ++++++++++++
2 files changed, 232 insertions(+)
diff --git a/crypto/x509-utils.c b/crypto/x509-utils.c
index 29d5146bb2..67b42aad1f 100644
--- a/crypto/x509-utils.c
+++ b/crypto/x509-utils.c
@@ -27,6 +27,21 @@ static const int
qcrypto_to_gnutls_hash_alg_map[QCRYPTO_HASH_ALGO__MAX] = {
[QCRYPTO_HASH_ALGO_RIPEMD160] = GNUTLS_DIG_RMD160,
};
+static const int gnutls_to_qcrypto_pk_alg_map[] = {
+ [GNUTLS_PK_RSA] = QCRYPTO_PK_ALGO_RSA,
+ [GNUTLS_PK_DSA] = QCRYPTO_PK_ALGO_DSA,
+ [GNUTLS_PK_ECDSA] = QCRYPTO_PK_ALGO_ECDSA,
+ [GNUTLS_PK_RSA_OAEP] = QCRYPTO_PK_ALGO_RSA_OAEP,
+ [GNUTLS_PK_EDDSA_ED25519] = QCRYPTO_PK_ALGO_ED25519,
+ [GNUTLS_PK_EDDSA_ED448] = QCRYPTO_PK_ALGO_ED448,
+};
+
+static const int qcrypto_to_gnutls_keyid_flags_map[] = {
+ [QCRYPTO_HASH_ALGO_SHA1] = GNUTLS_KEYID_USE_SHA1,
+ [QCRYPTO_HASH_ALGO_SHA256] = GNUTLS_KEYID_USE_SHA256,
+ [QCRYPTO_HASH_ALGO_SHA512] = GNUTLS_KEYID_USE_SHA512,
+};
+
int qcrypto_get_x509_cert_fingerprint(uint8_t *cert, size_t size,
QCryptoHashAlgo alg,
uint8_t *result,
@@ -123,6 +138,143 @@ cleanup:
return ret;
}
+int qcrypto_x509_check_cert_times(uint8_t *cert, size_t size, Error **errp)
+{
+ int rc;
+ int ret = -1;
+ gnutls_x509_crt_t crt;
+ gnutls_datum_t datum = {.data = cert, .size = size};
+ time_t now = time(0);
+ time_t exp_time;
+ time_t act_time;
+
+ if (now == ((time_t)-1)) {
+ error_setg_errno(errp, errno, "Cannot get current time");
+ return ret;
+ }
+
+ rc = gnutls_x509_crt_init(&crt);
+ if (rc < 0) {
+ error_setg(errp, "Failed to initialize certificate: %s",
gnutls_strerror(rc));
+ return ret;
+ }
+
+ rc = gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM);
+ if (rc != 0) {
+ error_setg(errp, "Failed to import certificate: %s",
gnutls_strerror(rc));
+ goto cleanup;
+ }
+
+ exp_time = gnutls_x509_crt_get_expiration_time(crt);
+ if (exp_time == ((time_t)-1)) {
+ error_setg(errp, "Failed to get certificate expiration time");
+ goto cleanup;
+ }
+ if (exp_time < now) {
+ error_setg(errp, "The certificate has expired");
+ goto cleanup;
+ }
+
+ act_time = gnutls_x509_crt_get_activation_time(crt);
+ if (act_time == ((time_t)-1)) {
+ error_setg(errp, "Failed to get certificate activation time");
+ goto cleanup;
+ }
+ if (act_time > now) {
+ error_setg(errp, "The certificate is not yet active");
+ goto cleanup;
+ }
+
+ ret = 0;
+
+cleanup:
+ gnutls_x509_crt_deinit(crt);
+ return ret;
+}
+
+int qcrypto_x509_get_pk_algorithm(uint8_t *cert, size_t size, Error **errp)
+{
+ int rc;
+ int ret = -1;
+ unsigned int bits;
+ gnutls_x509_crt_t crt;
+ gnutls_datum_t datum = {.data = cert, .size = size};
+
+ rc = gnutls_x509_crt_init(&crt);
+ if (rc < 0) {
+ error_setg(errp, "Failed to initialize certificate: %s",
gnutls_strerror(rc));
+ return ret;
+ }
+
+ rc = gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM);
+ if (rc != 0) {
+ error_setg(errp, "Failed to import certificate: %s",
gnutls_strerror(rc));
+ goto cleanup;
+ }
+
+ rc = gnutls_x509_crt_get_pk_algorithm(crt, &bits);
+ if (rc >= G_N_ELEMENTS(gnutls_to_qcrypto_pk_alg_map)) {
+ error_setg(errp, "Unknown public key algorithm %d", rc);
+ goto cleanup;
+ }
+
+ ret = gnutls_to_qcrypto_pk_alg_map[rc];
+
+cleanup:
+ gnutls_x509_crt_deinit(crt);
+ return ret;
+}
+
+int qcrypto_x509_get_cert_key_id(uint8_t *cert, size_t size,
+ QCryptoHashAlgo hash_alg,
+ uint8_t **result,
+ size_t *resultlen,
+ Error **errp)
+{
+ int rc;
+ int ret = -1;
+ gnutls_x509_crt_t crt;
+ gnutls_datum_t datum = {.data = cert, .size = size};
+
+ if (hash_alg >= G_N_ELEMENTS(qcrypto_to_gnutls_keyid_flags_map)) {
+ error_setg(errp, "Unknow hash algorithm %d", hash_alg);
+ return ret;
+ }
+
+ rc = gnutls_x509_crt_init(&crt);
+ if (rc < 0) {
+ error_setg(errp, "Failed to initialize certificate: %s",
gnutls_strerror(rc));
+ return ret;
+ }
+
+ rc = gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM);
+ if (rc != 0) {
+ error_setg(errp, "Failed to import certificate: %s",
gnutls_strerror(rc));
+ goto cleanup;
+ }
+
+ *resultlen = gnutls_hash_get_len(qcrypto_to_gnutls_hash_alg_map[hash_alg]);
+ if (*resultlen == 0) {
+ error_setg(errp, "Failed to get hash algorithn length: %s",
gnutls_strerror(rc));
+ goto cleanup;
+ }
+
+ *result = g_malloc0(*resultlen);
+ if (gnutls_x509_crt_get_key_id(crt,
+ qcrypto_to_gnutls_keyid_flags_map[hash_alg],
+ *result, resultlen) != 0) {
+ error_setg(errp, "Failed to get key ID from certificate");
+ g_clear_pointer(result, g_free);
+ goto cleanup;
+ }
+
+ ret = 0;
+
+cleanup:
+ gnutls_x509_crt_deinit(crt);
+ return ret;
+}
+
#else /* ! CONFIG_GNUTLS */
int qcrypto_get_x509_cert_fingerprint(uint8_t *cert, size_t size,
@@ -144,4 +296,26 @@ int qcrypto_x509_convert_cert_der(uint8_t *cert, size_t
size,
return -1;
}
+int qcrypto_x509_check_cert_times(uint8_t *cert, size_t size, Error **errp)
+{
+ error_setg(errp, "GNUTLS is required to get certificate times");
+ return -1;
+}
+
+int qcrypto_x509_get_pk_algorithm(uint8_t *cert, size_t size, Error **errp)
+{
+ error_setg(errp, "GNUTLS is required to get public key algorithm");
+ return -1;
+}
+
+int qcrypto_x509_get_cert_key_id(uint8_t *cert, size_t size,
+ QCryptoHashAlgo hash_alg,
+ uint8_t **result,
+ size_t *resultlen,
+ Error **errp)
+{
+ error_setg(errp, "GNUTLS is required to get key ID");
+ return -1;
+}
+
#endif /* ! CONFIG_GNUTLS */
diff --git a/include/crypto/x509-utils.h b/include/crypto/x509-utils.h
index 4239e3e55a..f169df81cb 100644
--- a/include/crypto/x509-utils.h
+++ b/include/crypto/x509-utils.h
@@ -13,6 +13,15 @@
#include "crypto/hash.h"
+typedef enum {
+ QCRYPTO_PK_ALGO_RSA,
+ QCRYPTO_PK_ALGO_DSA,
+ QCRYPTO_PK_ALGO_ECDSA,
+ QCRYPTO_PK_ALGO_RSA_OAEP,
+ QCRYPTO_PK_ALGO_ED25519,
+ QCRYPTO_PK_ALGO_ED448,
+} QCryptoPkAlgo;
+
int qcrypto_get_x509_cert_fingerprint(uint8_t *cert, size_t size,
QCryptoHashAlgo hash,
uint8_t *result,
@@ -39,4 +48,53 @@ int qcrypto_x509_convert_cert_der(uint8_t *cert, size_t size,
size_t *resultlen,
Error **errp);
+/**
+ * qcrypto_x509_check_cert_times
+ * @cert: pointer to the raw certificate data
+ * @size: size of the certificate
+ * @errp: error pointer
+ *
+ * Check whether the activation and expiration times of @cert
+ * are valid at the current time.
+ *
+ * Returns: 0 if the certificate times are valid,
+ * -1 on error.
+ */
+int qcrypto_x509_check_cert_times(uint8_t *cert, size_t size, Error **errp);
+
+/**
+ * qcrypto_x509_get_pk_algorithm
+ * @cert: pointer to the raw certificate data
+ * @size: size of the certificate
+ * @errp: error pointer
+ *
+ * Determine the public key algorithm of the @cert.
+ *
+ * Returns: a value from the QCryptoPkAlgo enum on success,
+ * -1 on error.
+ */
+int qcrypto_x509_get_pk_algorithm(uint8_t *cert, size_t size, Error **errp);
+
+/**
+ * qcrypto_x509_get_cert_key_id
+ * @cert: pointer to the raw certificate data
+ * @size: size of the certificate
+ * @hash_alg: the hash algorithm flag
+ * @result: output location for the allocated buffer for key ID
+ (the function allocates memory which must be freed by the caller)
+ * @resultlen: pointer to the size of the buffer
+ (will be updated with the actual size of key id)
+ * @errp: error pointer
+ *
+ * Retrieve the key ID from the @cert based on the specified @flag.
+ *
+ * Returns: 0 if key ID was successfully stored in @result,
+ * -1 on error.
+ */
+int qcrypto_x509_get_cert_key_id(uint8_t *cert, size_t size,
+ QCryptoHashAlgo hash_alg,
+ uint8_t **result,
+ size_t *resultlen,
+ Error **errp);
+
#endif
--
2.50.1
