{"id":2219375,"url":"http://patchwork.ozlabs.org/api/1.0/patches/2219375/?format=json","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.0/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260402221453.1602899-9-zycai@linux.ibm.com>","date":"2026-04-02T22:14:30","name":"[v10,08/30] crypto/x509-utils: Add helper functions for DIAG 320 subcode 2","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"6c1d21800e8bf645a385d8b193c8abd76439deff","submitter":{"id":90643,"url":"http://patchwork.ozlabs.org/api/1.0/people/90643/?format=json","name":"Zhuoying Cai","email":"zycai@linux.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260402221453.1602899-9-zycai@linux.ibm.com/mbox/","series":[{"id":498557,"url":"http://patchwork.ozlabs.org/api/1.0/series/498557/?format=json","date":"2026-04-02T22:14:35","name":"Secure IPL Support for SCSI Scheme of virtio-blk/virtio-scsi Devices","version":10,"mbox":"http://patchwork.ozlabs.org/series/498557/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2219375/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=W8w/WfA1;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n 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9JAu5SbUVwVlKy7NIyHIy/60mYvydTGsLN8dWqokPFCZZ72XTwObGOTMVEAUYq0f\n 1YKuT4jgMS9jRWPp2GI92lvPdpgYtxORAxspgDi88zZbX3PAX1JuaXR1D/dhwjUI\n OY7fY7Nu72z5HicSRUdUVdOrZjj1dX+NnFizlUI5wZc5A4Y7KtFpw==","From":"Zhuoying Cai ","To":"qemu-s390x@nongnu.org, qemu-devel@nongnu.org","Cc":"jrossi@linux.ibm.com, cohuck@redhat.com, berrange@redhat.com,\n richard.henderson@linaro.org, pierrick.bouvier@linaro.org,\n david@kernel.org, walling@linux.ibm.com, jjherne@linux.ibm.com,\n pasic@linux.ibm.com, borntraeger@linux.ibm.com, farman@linux.ibm.com,\n mjrosato@linux.ibm.com, iii@linux.ibm.com, eblake@redhat.com,\n armbru@redhat.com, zycai@linux.ibm.com, alifm@linux.ibm.com,\n brueckner@linux.ibm.com, jdaley@linux.ibm.com","Subject":"[PATCH v10 08/30] crypto/x509-utils: Add helper functions for DIAG\n 320 subcode 2","Date":"Thu, 2 Apr 2026 18:14:30 -0400","Message-ID":"<20260402221453.1602899-9-zycai@linux.ibm.com>","X-Mailer":"git-send-email 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BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7,\n RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001,\n RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,\n SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Introduce new helper functions to extract certificate metadata:\n\nqcrypto_x509_check_cert_times() - validates the certificate's validity period against the current time\nqcrypto_x509_get_pk_algorithm() - returns the public key algorithm used in the certificate\nqcrypto_x509_get_cert_key_id() - extracts the key ID from the certificate\nqcrypto_x509_check_ecc_curve_p521() - determines the ECC public key algorithm uses P-521 curve\n\nThese functions provide support for metadata extraction and validity checking\nfor X.509 certificates.\n\nSigned-off-by: Zhuoying Cai \nReviewed-by: Farhan Ali\n---\n crypto/x509-utils.c | 236 ++++++++++++++++++++++++++++++++++++\n include/crypto/x509-utils.h | 51 ++++++++\n 2 files changed, 287 insertions(+)","diff":"diff --git a/crypto/x509-utils.c b/crypto/x509-utils.c\nindex 2696d48155..906d5e5e87 100644\n--- a/crypto/x509-utils.c\n+++ b/crypto/x509-utils.c\n@@ -27,6 +27,16 @@ static const int qcrypto_to_gnutls_hash_alg_map[QCRYPTO_HASH_ALGO__MAX] = {\n [QCRYPTO_HASH_ALGO_RIPEMD160] = GNUTLS_DIG_RMD160,\n };\n \n+static const int qcrypto_to_gnutls_keyid_flags_map[] = {\n+ [QCRYPTO_HASH_ALGO_MD5] = -1,\n+ [QCRYPTO_HASH_ALGO_SHA1] = GNUTLS_KEYID_USE_SHA1,\n+ [QCRYPTO_HASH_ALGO_SHA224] = -1,\n+ [QCRYPTO_HASH_ALGO_SHA256] = GNUTLS_KEYID_USE_SHA256,\n+ [QCRYPTO_HASH_ALGO_SHA384] = -1,\n+ [QCRYPTO_HASH_ALGO_SHA512] = GNUTLS_KEYID_USE_SHA512,\n+ [QCRYPTO_HASH_ALGO_RIPEMD160] = -1,\n+};\n+\n int qcrypto_get_x509_cert_fingerprint(uint8_t *cert, size_t size,\n QCryptoHashAlgo alg,\n uint8_t *result,\n@@ -121,6 +131,210 @@ cleanup:\n return ret;\n }\n \n+int qcrypto_x509_check_cert_times(uint8_t *cert, size_t size, Error **errp)\n+{\n+ int rc;\n+ int ret = -1;\n+ gnutls_x509_crt_t crt;\n+ gnutls_datum_t datum = {.data = cert, .size = size};\n+ time_t now = time(NULL);\n+ time_t exp_time;\n+ time_t act_time;\n+\n+ if (now == ((time_t)-1)) {\n+ error_setg_errno(errp, errno, \"Cannot get current time\");\n+ return ret;\n+ }\n+\n+ rc = gnutls_x509_crt_init(&crt);\n+ if (rc < 0) {\n+ error_setg(errp, \"Failed to initialize certificate: %s\", gnutls_strerror(rc));\n+ return ret;\n+ }\n+\n+ rc = gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM);\n+ if (rc != 0) {\n+ error_setg(errp, \"Failed to import certificate: %s\", gnutls_strerror(rc));\n+ goto cleanup;\n+ }\n+\n+ exp_time = gnutls_x509_crt_get_expiration_time(crt);\n+ if (exp_time == ((time_t)-1)) {\n+ error_setg(errp, \"Failed to get certificate expiration time\");\n+ goto cleanup;\n+ }\n+ if (exp_time < now) {\n+ error_setg(errp, \"The certificate has expired\");\n+ goto cleanup;\n+ }\n+\n+ act_time = gnutls_x509_crt_get_activation_time(crt);\n+ if (act_time == ((time_t)-1)) {\n+ error_setg(errp, \"Failed to get certificate activation time\");\n+ goto cleanup;\n+ }\n+ if (act_time > now) {\n+ error_setg(errp, \"The certificate is not yet active\");\n+ goto cleanup;\n+ }\n+\n+ ret = 0;\n+\n+cleanup:\n+ gnutls_x509_crt_deinit(crt);\n+ return ret;\n+}\n+\n+static int qcrypto_x509_get_pk_algorithm(uint8_t *cert, size_t size, Error **errp)\n+{\n+ int rc;\n+ int ret = -1;\n+ unsigned int bits;\n+ gnutls_x509_crt_t crt;\n+ gnutls_datum_t datum = {.data = cert, .size = size};\n+\n+ rc = gnutls_x509_crt_init(&crt);\n+ if (rc < 0) {\n+ error_setg(errp, \"Failed to initialize certificate: %s\", gnutls_strerror(rc));\n+ return ret;\n+ }\n+\n+ rc = gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM);\n+ if (rc != 0) {\n+ error_setg(errp, \"Failed to import certificate: %s\", gnutls_strerror(rc));\n+ goto cleanup;\n+ }\n+\n+ rc = gnutls_x509_crt_get_pk_algorithm(crt, &bits);\n+ if (rc < 0) {\n+ error_setg(errp, \"Unknown public key algorithm %d\", rc);\n+ goto cleanup;\n+ }\n+\n+ ret = rc;\n+\n+cleanup:\n+ gnutls_x509_crt_deinit(crt);\n+ return ret;\n+}\n+\n+int qcrypto_x509_get_cert_key_id(uint8_t *cert, size_t size,\n+ QCryptoHashAlgo hash_alg,\n+ uint8_t **result,\n+ size_t *resultlen,\n+ Error **errp)\n+{\n+ int rc;\n+ int ret = -1;\n+ gnutls_x509_crt_t crt;\n+ gnutls_datum_t datum = {.data = cert, .size = size};\n+\n+ if (hash_alg >= G_N_ELEMENTS(qcrypto_to_gnutls_hash_alg_map)) {\n+ error_setg(errp, \"Unknown hash algorithm %d\", hash_alg);\n+ return ret;\n+ }\n+\n+ if (hash_alg >= G_N_ELEMENTS(qcrypto_to_gnutls_keyid_flags_map) ||\n+ qcrypto_to_gnutls_keyid_flags_map[hash_alg] == -1) {\n+ error_setg(errp, \"Unsupported key id flag %d\", hash_alg);\n+ return ret;\n+ }\n+\n+ rc = gnutls_x509_crt_init(&crt);\n+ if (rc < 0) {\n+ error_setg(errp, \"Failed to initialize certificate: %s\", gnutls_strerror(rc));\n+ return ret;\n+ }\n+\n+ rc = gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM);\n+ if (rc != 0) {\n+ error_setg(errp, \"Failed to import certificate: %s\", gnutls_strerror(rc));\n+ goto cleanup;\n+ }\n+\n+ *resultlen = gnutls_hash_get_len(qcrypto_to_gnutls_hash_alg_map[hash_alg]);\n+ if (*resultlen == 0) {\n+ error_setg(errp, \"Failed to get hash algorithn length: %s\", gnutls_strerror(rc));\n+ goto cleanup;\n+ }\n+\n+ *result = g_malloc0(*resultlen);\n+ if (gnutls_x509_crt_get_key_id(crt,\n+ qcrypto_to_gnutls_keyid_flags_map[hash_alg],\n+ *result, resultlen) != 0) {\n+ error_setg(errp, \"Failed to get key ID from certificate\");\n+ g_clear_pointer(result, g_free);\n+ goto cleanup;\n+ }\n+\n+ ret = 0;\n+\n+cleanup:\n+ gnutls_x509_crt_deinit(crt);\n+ return ret;\n+}\n+\n+static int qcrypto_x509_get_ecc_curve(uint8_t *cert, size_t size, Error **errp)\n+{\n+ int rc;\n+ int ret = -1;\n+ gnutls_x509_crt_t crt;\n+ gnutls_datum_t datum = {.data = cert, .size = size};\n+ gnutls_ecc_curve_t curve_id;\n+ gnutls_datum_t x = {.data = NULL, .size = 0};\n+ gnutls_datum_t y = {.data = NULL, .size = 0};\n+\n+ rc = gnutls_x509_crt_init(&crt);\n+ if (rc < 0) {\n+ error_setg(errp, \"Failed to initialize certificate: %s\", gnutls_strerror(rc));\n+ return ret;\n+ }\n+\n+ rc = gnutls_x509_crt_import(crt, &datum, GNUTLS_X509_FMT_PEM);\n+ if (rc != 0) {\n+ error_setg(errp, \"Failed to import certificate: %s\", gnutls_strerror(rc));\n+ goto cleanup;\n+ }\n+\n+ rc = gnutls_x509_crt_get_pk_ecc_raw(crt, &curve_id, &x, &y);\n+ if (rc != 0) {\n+ error_setg(errp, \"Failed to get ECC public key curve: %s\", gnutls_strerror(rc));\n+ goto cleanup;\n+ }\n+\n+ ret = curve_id;\n+\n+cleanup:\n+ gnutls_x509_crt_deinit(crt);\n+ gnutls_free(x.data);\n+ gnutls_free(y.data);\n+ return ret;\n+}\n+\n+int qcrypto_x509_check_ecc_curve_p521(uint8_t *cert, size_t size, Error **errp)\n+{\n+ int algo;\n+ int curve_id;\n+\n+ algo = qcrypto_x509_get_pk_algorithm(cert, size, errp);\n+ if (algo != GNUTLS_PK_ECDSA) {\n+ return 0;\n+ }\n+\n+ curve_id = qcrypto_x509_get_ecc_curve(cert, size, errp);\n+ if (curve_id == -1) {\n+ error_setg(errp, \"Failed to get ECC curve\");\n+ return -1;\n+ }\n+\n+ if (curve_id == GNUTLS_ECC_CURVE_INVALID) {\n+ error_setg(errp, \"Invalid ECC curve\");\n+ return -1;\n+ }\n+\n+ return curve_id == GNUTLS_ECC_CURVE_SECP521R1;\n+}\n+\n #else /* ! CONFIG_GNUTLS */\n \n int qcrypto_get_x509_cert_fingerprint(uint8_t *cert, size_t size,\n@@ -142,4 +356,26 @@ int qcrypto_x509_convert_cert_der(uint8_t *cert, size_t size,\n return -1;\n }\n \n+int qcrypto_x509_check_cert_times(uint8_t *cert, size_t size, Error **errp)\n+{\n+ error_setg(errp, \"GNUTLS is required to get certificate times\");\n+ return -1;\n+}\n+\n+int qcrypto_x509_get_cert_key_id(uint8_t *cert, size_t size,\n+ QCryptoHashAlgo hash_alg,\n+ uint8_t **result,\n+ size_t *resultlen,\n+ Error **errp)\n+{\n+ error_setg(errp, \"GNUTLS is required to get key ID\");\n+ return -1;\n+}\n+\n+int qcrypto_x509_check_ecc_curve_p521(uint8_t *cert, size_t size, Error **errp)\n+{\n+ error_setg(errp, \"GNUTLS is required to determine ecc curve\");\n+ return -1;\n+}\n+\n #endif /* ! CONFIG_GNUTLS */\ndiff --git a/include/crypto/x509-utils.h b/include/crypto/x509-utils.h\nindex 91ae79fb03..6040894a46 100644\n--- a/include/crypto/x509-utils.h\n+++ b/include/crypto/x509-utils.h\n@@ -40,4 +40,55 @@ int qcrypto_x509_convert_cert_der(uint8_t *cert, size_t size,\n size_t *resultlen,\n Error **errp);\n \n+/**\n+ * qcrypto_x509_check_cert_times\n+ * @cert: pointer to the raw certificate data\n+ * @size: size of the certificate\n+ * @errp: error pointer\n+ *\n+ * Check whether the activation and expiration times of @cert\n+ * are valid at the current time.\n+ *\n+ * Returns: 0 if the certificate times are valid,\n+ * -1 on error.\n+ */\n+int qcrypto_x509_check_cert_times(uint8_t *cert, size_t size, Error **errp);\n+\n+/**\n+ * qcrypto_x509_get_cert_key_id\n+ * @cert: pointer to the raw certificate data\n+ * @size: size of the certificate\n+ * @hash_alg: the hash algorithm flag\n+ * @result: output location for the allocated buffer for key ID\n+ * (the function allocates memory which must be freed by the caller)\n+ * @resultlen: pointer to the size of the buffer\n+ * (will be updated with the actual size of key id)\n+ * @errp: error pointer\n+ *\n+ * Retrieve the key ID from the @cert based on the specified @flag.\n+ *\n+ * Returns: 0 if key ID was successfully stored in @result,\n+ * -1 on error.\n+ */\n+int qcrypto_x509_get_cert_key_id(uint8_t *cert, size_t size,\n+ QCryptoHashAlgo hash_alg,\n+ uint8_t **result,\n+ size_t *resultlen,\n+ Error **errp);\n+\n+/**\n+ * qcrypto_x509_check_ecc_curve_p521\n+ * @cert: pointer to the raw certificate data\n+ * @size: size of the certificate\n+ * @errp: error pointer\n+ *\n+ * Determine whether the ECC public key in the given certificate uses the P-521\n+ * curve.\n+ *\n+ * Returns: 0 if ECC public key does not use P521 curve.\n+ * 1 if ECC public key uses P521 curve.\n+ * -1 on error.\n+ */\n+int qcrypto_x509_check_ecc_curve_p521(uint8_t *cert, size_t size, Error **errp);\n+\n #endif\n","prefixes":["v10","08/30"]}