/* * Certificate generation and signing * * Copyright The Mbed TLS Contributors * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbedtls/build_info.h" #include "mbedtls/platform.h" /* md.h is included this early since MD_CAN_XXX macros are defined there. */ #include "mbedtls/md.h" #if !defined(MBEDTLS_X509_CRT_WRITE_C) || \ !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) || \ !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C) || \ !defined(MBEDTLS_ERROR_C) || !defined(MBEDTLS_MD_CAN_SHA256) || \ !defined(MBEDTLS_PEM_WRITE_C) int main(void) { mbedtls_printf("MBEDTLS_X509_CRT_WRITE_C and/or MBEDTLS_X509_CRT_PARSE_C and/or " "MBEDTLS_FS_IO and/or MBEDTLS_MD_CAN_SHA256 and/or " "MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C and/or " "MBEDTLS_ERROR_C not defined.\n"); mbedtls_exit(0); } #else #include "mbedtls/x509_crt.h" #include "mbedtls/x509_csr.h" #include "mbedtls/oid.h" #include "mbedtls/entropy.h" #include "mbedtls/ctr_drbg.h" #include "mbedtls/error.h" #include "test/helpers.h" #include #include #include #include #define SET_OID(x, oid) \ do { x.len = MBEDTLS_OID_SIZE(oid); x.p = (unsigned char *) oid; } while (0) #if defined(MBEDTLS_X509_CSR_PARSE_C) #define USAGE_CSR \ " request_file=%%s default: (empty)\n" \ " If request_file is specified, subject_key,\n" \ " subject_pwd and subject_name are ignored!\n" #else #define USAGE_CSR "" #endif /* MBEDTLS_X509_CSR_PARSE_C */ #define FORMAT_PEM 0 #define FORMAT_DER 1 #define DFL_ISSUER_CRT "" #define DFL_REQUEST_FILE "" #define DFL_SUBJECT_KEY "subject.key" #define DFL_ISSUER_KEY "ca.key" #define DFL_SUBJECT_PWD "" #define DFL_ISSUER_PWD "" #define DFL_OUTPUT_FILENAME "cert.crt" #define DFL_SUBJECT_NAME "CN=Cert,O=mbed TLS,C=UK" #define DFL_ISSUER_NAME "CN=CA,O=mbed TLS,C=UK" #define DFL_NOT_BEFORE "20010101000000" #define DFL_NOT_AFTER "20301231235959" #define DFL_SERIAL "1" #define DFL_SERIAL_HEX "1" #define DFL_SELFSIGN 0 #define DFL_IS_CA 0 #define DFL_MAX_PATHLEN -1 #define DFL_SIG_ALG MBEDTLS_MD_SHA256 #define DFL_KEY_USAGE 0 #define DFL_EXT_KEY_USAGE NULL #define DFL_NS_CERT_TYPE 0 #define DFL_VERSION 3 #define DFL_AUTH_IDENT 1 #define DFL_SUBJ_IDENT 1 #define DFL_CONSTRAINTS 1 #define DFL_DIGEST MBEDTLS_MD_SHA256 #define DFL_FORMAT FORMAT_PEM #define USAGE \ "\n usage: cert_write param=<>...\n" \ "\n acceptable parameters:\n" \ USAGE_CSR \ " subject_key=%%s default: subject.key\n" \ " subject_pwd=%%s default: (empty)\n" \ " subject_name=%%s default: CN=Cert,O=mbed TLS,C=UK\n" \ "\n" \ " issuer_crt=%%s default: (empty)\n" \ " If issuer_crt is specified, issuer_name is\n" \ " ignored!\n" \ " issuer_name=%%s default: CN=CA,O=mbed TLS,C=UK\n" \ "\n" \ " selfsign=%%d default: 0 (false)\n" \ " If selfsign is enabled, issuer_name and\n" \ " issuer_key are required (issuer_crt and\n" \ " subject_* are ignored\n" \ " issuer_key=%%s default: ca.key\n" \ " issuer_pwd=%%s default: (empty)\n" \ " output_file=%%s default: cert.crt\n" \ " serial=%%s default: 1\n" \ " In decimal format; it can be used as\n" \ " alternative to serial_hex, but it's\n" \ " limited in max length to\n" \ " unsigned long long int\n" \ " serial_hex=%%s default: 1\n" \ " In hex format; it can be used as\n" \ " alternative to serial\n" \ " not_before=%%s default: 20010101000000\n" \ " not_after=%%s default: 20301231235959\n" \ " is_ca=%%d default: 0 (disabled)\n" \ " max_pathlen=%%d default: -1 (none)\n" \ " md=%%s default: SHA256\n" \ " Supported values (if enabled):\n" \ " MD5, RIPEMD160, SHA1,\n" \ " SHA224, SHA256, SHA384, SHA512\n" \ " version=%%d default: 3\n" \ " Possible values: 1, 2, 3\n" \ " subject_identifier=%%s default: 1\n" \ " Possible values: 0, 1\n" \ " (Considered for v3 only)\n" \ " authority_identifier=%%s default: 1\n" \ " Possible values: 0, 1\n" \ " (Considered for v3 only)\n" \ " basic_constraints=%%d default: 1\n" \ " Possible values: 0, 1\n" \ " (Considered for v3 only)\n" \ " key_usage=%%s default: (empty)\n" \ " Comma-separated-list of values:\n" \ " digital_signature\n" \ " non_repudiation\n" \ " key_encipherment\n" \ " data_encipherment\n" \ " key_agreement\n" \ " key_cert_sign\n" \ " crl_sign\n" \ " (Considered for v3 only)\n" \ " ext_key_usage=%%s default: (empty)\n" \ " Comma-separated-list of values:\n" \ " serverAuth\n" \ " clientAuth\n" \ " codeSigning\n" \ " emailProtection\n" \ " timeStamping\n" \ " OCSPSigning\n" \ " ns_cert_type=%%s default: (empty)\n" \ " Comma-separated-list of values:\n" \ " ssl_client\n" \ " ssl_server\n" \ " email\n" \ " object_signing\n" \ " ssl_ca\n" \ " email_ca\n" \ " object_signing_ca\n" \ " format=pem|der default: pem\n" \ "\n" typedef enum { SERIAL_FRMT_UNSPEC, SERIAL_FRMT_DEC, SERIAL_FRMT_HEX } serial_format_t; /* * global options */ struct options { const char *issuer_crt; /* filename of the issuer certificate */ const char *request_file; /* filename of the certificate request */ const char *subject_key; /* filename of the subject key file */ const char *issuer_key; /* filename of the issuer key file */ const char *subject_pwd; /* password for the subject key file */ const char *issuer_pwd; /* password for the issuer key file */ const char *output_file; /* where to store the constructed CRT */ const char *subject_name; /* subject name for certificate */ const char *issuer_name; /* issuer name for certificate */ const char *not_before; /* validity period not before */ const char *not_after; /* validity period not after */ const char *serial; /* serial number string (decimal) */ const char *serial_hex; /* serial number string (hex) */ int selfsign; /* selfsign the certificate */ int is_ca; /* is a CA certificate */ int max_pathlen; /* maximum CA path length */ int authority_identifier; /* add authority identifier to CRT */ int subject_identifier; /* add subject identifier to CRT */ int basic_constraints; /* add basic constraints ext to CRT */ int version; /* CRT version */ mbedtls_md_type_t md; /* Hash used for signing */ unsigned char key_usage; /* key usage flags */ mbedtls_asn1_sequence *ext_key_usage; /* extended key usages */ unsigned char ns_cert_type; /* NS cert type */ int format; /* format */ } opt; int write_certificate(mbedtls_x509write_cert *crt, const char *output_file, int (*f_rng)(void *, unsigned char *, size_t), void *p_rng) { int ret; FILE *f; unsigned char output_buf[4096]; unsigned char *output_start; size_t len = 0; memset(output_buf, 0, 4096); if (opt.format == FORMAT_DER) { ret = mbedtls_x509write_crt_der(crt, output_buf, 4096, f_rng, p_rng); if (ret < 0) { return ret; } len = ret; output_start = output_buf + 4096 - len; } else { ret = mbedtls_x509write_crt_pem(crt, output_buf, 4096, f_rng, p_rng); if (ret < 0) { return ret; } len = strlen((char *) output_buf); output_start = output_buf; } if ((f = fopen(output_file, "w")) == NULL) { return -1; } if (fwrite(output_start, 1, len, f) != len) { fclose(f); return -1; } fclose(f); return 0; } int parse_serial_decimal_format(unsigned char *obuf, size_t obufmax, const char *ibuf, size_t *len) { unsigned long long int dec; unsigned int remaining_bytes = sizeof(dec); unsigned char *p = obuf; unsigned char val; char *end_ptr = NULL; errno = 0; dec = strtoull(ibuf, &end_ptr, 10); if ((errno != 0) || (end_ptr == ibuf)) { return -1; } *len = 0; while (remaining_bytes > 0) { if (obufmax < (*len + 1)) { return -1; } val = (dec >> ((remaining_bytes - 1) * 8)) & 0xFF; /* Skip leading zeros */ if ((val != 0) || (*len != 0)) { *p = val; (*len)++; p++; } remaining_bytes--; } return 0; } int main(int argc, char *argv[]) { int ret = 1; int exit_code = MBEDTLS_EXIT_FAILURE; mbedtls_x509_crt issuer_crt; mbedtls_pk_context loaded_issuer_key, loaded_subject_key; mbedtls_pk_context *issuer_key = &loaded_issuer_key, *subject_key = &loaded_subject_key; char buf[1024]; char issuer_name[256]; int i; char *p, *q, *r; #if defined(MBEDTLS_X509_CSR_PARSE_C) char subject_name[256]; mbedtls_x509_csr csr; #endif mbedtls_x509write_cert crt; serial_format_t serial_frmt = SERIAL_FRMT_UNSPEC; unsigned char serial[MBEDTLS_X509_RFC5280_MAX_SERIAL_LEN]; size_t serial_len; mbedtls_asn1_sequence *ext_key_usage; mbedtls_entropy_context entropy; mbedtls_ctr_drbg_context ctr_drbg; const char *pers = "crt example app"; /* * Set to sane values */ mbedtls_x509write_crt_init(&crt); mbedtls_pk_init(&loaded_issuer_key); mbedtls_pk_init(&loaded_subject_key); mbedtls_ctr_drbg_init(&ctr_drbg); mbedtls_entropy_init(&entropy); #if defined(MBEDTLS_X509_CSR_PARSE_C) mbedtls_x509_csr_init(&csr); #endif mbedtls_x509_crt_init(&issuer_crt); memset(buf, 0, sizeof(buf)); memset(serial, 0, sizeof(serial)); #if defined(MBEDTLS_USE_PSA_CRYPTO) psa_status_t status = psa_crypto_init(); if (status != PSA_SUCCESS) { mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n", (int) status); goto exit; } #endif /* MBEDTLS_USE_PSA_CRYPTO */ if (argc < 2) { usage: mbedtls_printf(USAGE); goto exit; } opt.issuer_crt = DFL_ISSUER_CRT; opt.request_file = DFL_REQUEST_FILE; opt.subject_key = DFL_SUBJECT_KEY; opt.issuer_key = DFL_ISSUER_KEY; opt.subject_pwd = DFL_SUBJECT_PWD; opt.issuer_pwd = DFL_ISSUER_PWD; opt.output_file = DFL_OUTPUT_FILENAME; opt.subject_name = DFL_SUBJECT_NAME; opt.issuer_name = DFL_ISSUER_NAME; opt.not_before = DFL_NOT_BEFORE; opt.not_after = DFL_NOT_AFTER; opt.serial = DFL_SERIAL; opt.serial_hex = DFL_SERIAL_HEX; opt.selfsign = DFL_SELFSIGN; opt.is_ca = DFL_IS_CA; opt.max_pathlen = DFL_MAX_PATHLEN; opt.key_usage = DFL_KEY_USAGE; opt.ext_key_usage = DFL_EXT_KEY_USAGE; opt.ns_cert_type = DFL_NS_CERT_TYPE; opt.version = DFL_VERSION - 1; opt.md = DFL_DIGEST; opt.subject_identifier = DFL_SUBJ_IDENT; opt.authority_identifier = DFL_AUTH_IDENT; opt.basic_constraints = DFL_CONSTRAINTS; opt.format = DFL_FORMAT; for (i = 1; i < argc; i++) { p = argv[i]; if ((q = strchr(p, '=')) == NULL) { goto usage; } *q++ = '\0'; if (strcmp(p, "request_file") == 0) { opt.request_file = q; } else if (strcmp(p, "subject_key") == 0) { opt.subject_key = q; } else if (strcmp(p, "issuer_key") == 0) { opt.issuer_key = q; } else if (strcmp(p, "subject_pwd") == 0) { opt.subject_pwd = q; } else if (strcmp(p, "issuer_pwd") == 0) { opt.issuer_pwd = q; } else if (strcmp(p, "issuer_crt") == 0) { opt.issuer_crt = q; } else if (strcmp(p, "output_file") == 0) { opt.output_file = q; } else if (strcmp(p, "subject_name") == 0) { opt.subject_name = q; } else if (strcmp(p, "issuer_name") == 0) { opt.issuer_name = q; } else if (strcmp(p, "not_before") == 0) { opt.not_before = q; } else if (strcmp(p, "not_after") == 0) { opt.not_after = q; } else if (strcmp(p, "serial") == 0) { if (serial_frmt != SERIAL_FRMT_UNSPEC) { mbedtls_printf("Invalid attempt to set the serial more than once\n"); goto usage; } serial_frmt = SERIAL_FRMT_DEC; opt.serial = q; } else if (strcmp(p, "serial_hex") == 0) { if (serial_frmt != SERIAL_FRMT_UNSPEC) { mbedtls_printf("Invalid attempt to set the serial more than once\n"); goto usage; } serial_frmt = SERIAL_FRMT_HEX; opt.serial_hex = q; } else if (strcmp(p, "authority_identifier") == 0) { opt.authority_identifier = atoi(q); if (opt.authority_identifier != 0 && opt.authority_identifier != 1) { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } } else if (strcmp(p, "subject_identifier") == 0) { opt.subject_identifier = atoi(q); if (opt.subject_identifier != 0 && opt.subject_identifier != 1) { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } } else if (strcmp(p, "basic_constraints") == 0) { opt.basic_constraints = atoi(q); if (opt.basic_constraints != 0 && opt.basic_constraints != 1) { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } } else if (strcmp(p, "md") == 0) { const mbedtls_md_info_t *md_info = mbedtls_md_info_from_string(q); if (md_info == NULL) { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } opt.md = mbedtls_md_get_type(md_info); } else if (strcmp(p, "version") == 0) { opt.version = atoi(q); if (opt.version < 1 || opt.version > 3) { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } opt.version--; } else if (strcmp(p, "selfsign") == 0) { opt.selfsign = atoi(q); if (opt.selfsign < 0 || opt.selfsign > 1) { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } } else if (strcmp(p, "is_ca") == 0) { opt.is_ca = atoi(q); if (opt.is_ca < 0 || opt.is_ca > 1) { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } } else if (strcmp(p, "max_pathlen") == 0) { opt.max_pathlen = atoi(q); if (opt.max_pathlen < -1 || opt.max_pathlen > 127) { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } } else if (strcmp(p, "key_usage") == 0) { while (q != NULL) { if ((r = strchr(q, ',')) != NULL) { *r++ = '\0'; } if (strcmp(q, "digital_signature") == 0) { opt.key_usage |= MBEDTLS_X509_KU_DIGITAL_SIGNATURE; } else if (strcmp(q, "non_repudiation") == 0) { opt.key_usage |= MBEDTLS_X509_KU_NON_REPUDIATION; } else if (strcmp(q, "key_encipherment") == 0) { opt.key_usage |= MBEDTLS_X509_KU_KEY_ENCIPHERMENT; } else if (strcmp(q, "data_encipherment") == 0) { opt.key_usage |= MBEDTLS_X509_KU_DATA_ENCIPHERMENT; } else if (strcmp(q, "key_agreement") == 0) { opt.key_usage |= MBEDTLS_X509_KU_KEY_AGREEMENT; } else if (strcmp(q, "key_cert_sign") == 0) { opt.key_usage |= MBEDTLS_X509_KU_KEY_CERT_SIGN; } else if (strcmp(q, "crl_sign") == 0) { opt.key_usage |= MBEDTLS_X509_KU_CRL_SIGN; } else { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } q = r; } } else if (strcmp(p, "ext_key_usage") == 0) { mbedtls_asn1_sequence **tail = &opt.ext_key_usage; while (q != NULL) { if ((r = strchr(q, ',')) != NULL) { *r++ = '\0'; } ext_key_usage = mbedtls_calloc(1, sizeof(mbedtls_asn1_sequence)); ext_key_usage->buf.tag = MBEDTLS_ASN1_OID; if (strcmp(q, "serverAuth") == 0) { SET_OID(ext_key_usage->buf, MBEDTLS_OID_SERVER_AUTH); } else if (strcmp(q, "clientAuth") == 0) { SET_OID(ext_key_usage->buf, MBEDTLS_OID_CLIENT_AUTH); } else if (strcmp(q, "codeSigning") == 0) { SET_OID(ext_key_usage->buf, MBEDTLS_OID_CODE_SIGNING); } else if (strcmp(q, "emailProtection") == 0) { SET_OID(ext_key_usage->buf, MBEDTLS_OID_EMAIL_PROTECTION); } else if (strcmp(q, "timeStamping") == 0) { SET_OID(ext_key_usage->buf, MBEDTLS_OID_TIME_STAMPING); } else if (strcmp(q, "OCSPSigning") == 0) { SET_OID(ext_key_usage->buf, MBEDTLS_OID_OCSP_SIGNING); } else { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } *tail = ext_key_usage; tail = &ext_key_usage->next; q = r; } } else if (strcmp(p, "ns_cert_type") == 0) { while (q != NULL) { if ((r = strchr(q, ',')) != NULL) { *r++ = '\0'; } if (strcmp(q, "ssl_client") == 0) { opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT; } else if (strcmp(q, "ssl_server") == 0) { opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER; } else if (strcmp(q, "email") == 0) { opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_EMAIL; } else if (strcmp(q, "object_signing") == 0) { opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING; } else if (strcmp(q, "ssl_ca") == 0) { opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_SSL_CA; } else if (strcmp(q, "email_ca") == 0) { opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA; } else if (strcmp(q, "object_signing_ca") == 0) { opt.ns_cert_type |= MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA; } else { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } q = r; } } else if (strcmp(p, "format") == 0) { if (strcmp(q, "der") == 0) { opt.format = FORMAT_DER; } else if (strcmp(q, "pem") == 0) { opt.format = FORMAT_PEM; } else { mbedtls_printf("Invalid argument for option %s\n", p); goto usage; } } else { goto usage; } } mbedtls_printf("\n"); /* * 0. Seed the PRNG */ mbedtls_printf(" . Seeding the random number generator..."); fflush(stdout); if ((ret = mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, (const unsigned char *) pers, strlen(pers))) != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_ctr_drbg_seed returned %d - %s\n", ret, buf); goto exit; } mbedtls_printf(" ok\n"); // Parse serial to MPI // mbedtls_printf(" . Reading serial number..."); fflush(stdout); if (serial_frmt == SERIAL_FRMT_HEX) { ret = mbedtls_test_unhexify(serial, sizeof(serial), opt.serial_hex, &serial_len); } else { // SERIAL_FRMT_DEC || SERIAL_FRMT_UNSPEC ret = parse_serial_decimal_format(serial, sizeof(serial), opt.serial, &serial_len); } if (ret != 0) { mbedtls_printf(" failed\n ! Unable to parse serial\n"); goto exit; } mbedtls_printf(" ok\n"); // Parse issuer certificate if present // if (!opt.selfsign && strlen(opt.issuer_crt)) { /* * 1.0.a. Load the certificates */ mbedtls_printf(" . Loading the issuer certificate ..."); fflush(stdout); if ((ret = mbedtls_x509_crt_parse_file(&issuer_crt, opt.issuer_crt)) != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse_file " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } ret = mbedtls_x509_dn_gets(issuer_name, sizeof(issuer_name), &issuer_crt.subject); if (ret < 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509_dn_gets " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } opt.issuer_name = issuer_name; mbedtls_printf(" ok\n"); } #if defined(MBEDTLS_X509_CSR_PARSE_C) // Parse certificate request if present // if (!opt.selfsign && strlen(opt.request_file)) { /* * 1.0.b. Load the CSR */ mbedtls_printf(" . Loading the certificate request ..."); fflush(stdout); if ((ret = mbedtls_x509_csr_parse_file(&csr, opt.request_file)) != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509_csr_parse_file " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } ret = mbedtls_x509_dn_gets(subject_name, sizeof(subject_name), &csr.subject); if (ret < 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509_dn_gets " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } opt.subject_name = subject_name; subject_key = &csr.pk; mbedtls_printf(" ok\n"); } #endif /* MBEDTLS_X509_CSR_PARSE_C */ /* * 1.1. Load the keys */ if (!opt.selfsign && !strlen(opt.request_file)) { mbedtls_printf(" . Loading the subject key ..."); fflush(stdout); ret = mbedtls_pk_parse_keyfile(&loaded_subject_key, opt.subject_key, opt.subject_pwd, mbedtls_ctr_drbg_random, &ctr_drbg); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_pk_parse_keyfile " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" ok\n"); } mbedtls_printf(" . Loading the issuer key ..."); fflush(stdout); ret = mbedtls_pk_parse_keyfile(&loaded_issuer_key, opt.issuer_key, opt.issuer_pwd, mbedtls_ctr_drbg_random, &ctr_drbg); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_pk_parse_keyfile " "returned -x%02x - %s\n\n", (unsigned int) -ret, buf); goto exit; } // Check if key and issuer certificate match // if (strlen(opt.issuer_crt)) { if (mbedtls_pk_check_pair(&issuer_crt.pk, issuer_key, mbedtls_ctr_drbg_random, &ctr_drbg) != 0) { mbedtls_printf(" failed\n ! issuer_key does not match " "issuer certificate\n\n"); goto exit; } } mbedtls_printf(" ok\n"); if (opt.selfsign) { opt.subject_name = opt.issuer_name; subject_key = issuer_key; } mbedtls_x509write_crt_set_subject_key(&crt, subject_key); mbedtls_x509write_crt_set_issuer_key(&crt, issuer_key); /* * 1.0. Check the names for validity */ if ((ret = mbedtls_x509write_crt_set_subject_name(&crt, opt.subject_name)) != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509write_crt_set_subject_name " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } if ((ret = mbedtls_x509write_crt_set_issuer_name(&crt, opt.issuer_name)) != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509write_crt_set_issuer_name " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" . Setting certificate values ..."); fflush(stdout); mbedtls_x509write_crt_set_version(&crt, opt.version); mbedtls_x509write_crt_set_md_alg(&crt, opt.md); ret = mbedtls_x509write_crt_set_serial_raw(&crt, serial, serial_len); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509write_crt_set_serial_raw " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } ret = mbedtls_x509write_crt_set_validity(&crt, opt.not_before, opt.not_after); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509write_crt_set_validity " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" ok\n"); if (opt.version == MBEDTLS_X509_CRT_VERSION_3 && opt.basic_constraints != 0) { mbedtls_printf(" . Adding the Basic Constraints extension ..."); fflush(stdout); ret = mbedtls_x509write_crt_set_basic_constraints(&crt, opt.is_ca, opt.max_pathlen); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! x509write_crt_set_basic_constraints " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" ok\n"); } #if defined(MBEDTLS_MD_CAN_SHA1) if (opt.version == MBEDTLS_X509_CRT_VERSION_3 && opt.subject_identifier != 0) { mbedtls_printf(" . Adding the Subject Key Identifier ..."); fflush(stdout); ret = mbedtls_x509write_crt_set_subject_key_identifier(&crt); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509write_crt_set_subject" "_key_identifier returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" ok\n"); } if (opt.version == MBEDTLS_X509_CRT_VERSION_3 && opt.authority_identifier != 0) { mbedtls_printf(" . Adding the Authority Key Identifier ..."); fflush(stdout); ret = mbedtls_x509write_crt_set_authority_key_identifier(&crt); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509write_crt_set_authority_" "key_identifier returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" ok\n"); } #endif /* MBEDTLS_MD_CAN_SHA1 */ if (opt.version == MBEDTLS_X509_CRT_VERSION_3 && opt.key_usage != 0) { mbedtls_printf(" . Adding the Key Usage extension ..."); fflush(stdout); ret = mbedtls_x509write_crt_set_key_usage(&crt, opt.key_usage); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509write_crt_set_key_usage " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" ok\n"); } if (opt.ext_key_usage) { mbedtls_printf(" . Adding the Extended Key Usage extension ..."); fflush(stdout); ret = mbedtls_x509write_crt_set_ext_key_usage(&crt, opt.ext_key_usage); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf( " failed\n ! mbedtls_x509write_crt_set_ext_key_usage returned -0x%02x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" ok\n"); } if (opt.version == MBEDTLS_X509_CRT_VERSION_3 && opt.ns_cert_type != 0) { mbedtls_printf(" . Adding the NS Cert Type extension ..."); fflush(stdout); ret = mbedtls_x509write_crt_set_ns_cert_type(&crt, opt.ns_cert_type); if (ret != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! mbedtls_x509write_crt_set_ns_cert_type " "returned -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" ok\n"); } /* * 1.2. Writing the certificate */ mbedtls_printf(" . Writing the certificate..."); fflush(stdout); if ((ret = write_certificate(&crt, opt.output_file, mbedtls_ctr_drbg_random, &ctr_drbg)) != 0) { mbedtls_strerror(ret, buf, sizeof(buf)); mbedtls_printf(" failed\n ! write_certificate -0x%04x - %s\n\n", (unsigned int) -ret, buf); goto exit; } mbedtls_printf(" ok\n"); exit_code = MBEDTLS_EXIT_SUCCESS; exit: #if defined(MBEDTLS_X509_CSR_PARSE_C) mbedtls_x509_csr_free(&csr); #endif /* MBEDTLS_X509_CSR_PARSE_C */ mbedtls_x509_crt_free(&issuer_crt); mbedtls_x509write_crt_free(&crt); mbedtls_pk_free(&loaded_subject_key); mbedtls_pk_free(&loaded_issuer_key); mbedtls_ctr_drbg_free(&ctr_drbg); mbedtls_entropy_free(&entropy); #if defined(MBEDTLS_USE_PSA_CRYPTO) mbedtls_psa_crypto_free(); #endif /* MBEDTLS_USE_PSA_CRYPTO */ mbedtls_exit(exit_code); } #endif /* MBEDTLS_X509_CRT_WRITE_C && MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_FS_IO && MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_ERROR_C && MBEDTLS_PEM_WRITE_C */