| /* |
| * Certificate request generation |
| * |
| * 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. |
| */ |
| |
| #if !defined(MBEDTLS_CONFIG_FILE) |
| #include "mbedtls/config.h" |
| #else |
| #include MBEDTLS_CONFIG_FILE |
| #endif |
| |
| #if defined(MBEDTLS_PLATFORM_C) |
| #include "mbedtls/platform.h" |
| #else |
| #include <stdio.h> |
| #include <stdlib.h> |
| #define mbedtls_printf printf |
| #define mbedtls_exit exit |
| #define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS |
| #define MBEDTLS_EXIT_FAILURE EXIT_FAILURE |
| #endif /* MBEDTLS_PLATFORM_C */ |
| |
| #if !defined(MBEDTLS_X509_CSR_WRITE_C) || !defined(MBEDTLS_FS_IO) || \ |
| !defined(MBEDTLS_PK_PARSE_C) || !defined(MBEDTLS_SHA256_C) || \ |
| !defined(MBEDTLS_ENTROPY_C) || !defined(MBEDTLS_CTR_DRBG_C) || \ |
| !defined(MBEDTLS_PEM_WRITE_C) |
| int main( void ) |
| { |
| mbedtls_printf( "MBEDTLS_X509_CSR_WRITE_C and/or MBEDTLS_FS_IO and/or " |
| "MBEDTLS_PK_PARSE_C and/or MBEDTLS_SHA256_C and/or " |
| "MBEDTLS_ENTROPY_C and/or MBEDTLS_CTR_DRBG_C " |
| "not defined.\n"); |
| mbedtls_exit( 0 ); |
| } |
| #else |
| |
| #include "mbedtls/x509_csr.h" |
| #include "mbedtls/entropy.h" |
| #include "mbedtls/ctr_drbg.h" |
| #include "mbedtls/error.h" |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #define DFL_FILENAME "keyfile.key" |
| #define DFL_PASSWORD NULL |
| #define DFL_DEBUG_LEVEL 0 |
| #define DFL_OUTPUT_FILENAME "cert.req" |
| #define DFL_SUBJECT_NAME "CN=Cert,O=mbed TLS,C=UK" |
| #define DFL_KEY_USAGE 0 |
| #define DFL_FORCE_KEY_USAGE 0 |
| #define DFL_NS_CERT_TYPE 0 |
| #define DFL_FORCE_NS_CERT_TYPE 0 |
| #define DFL_MD_ALG MBEDTLS_MD_SHA256 |
| |
| #define USAGE \ |
| "\n usage: cert_req param=<>...\n" \ |
| "\n acceptable parameters:\n" \ |
| " filename=%%s default: keyfile.key\n" \ |
| " password=%%s default: NULL\n" \ |
| " debug_level=%%d default: 0 (disabled)\n" \ |
| " output_file=%%s default: cert.req\n" \ |
| " subject_name=%%s default: CN=Cert,O=mbed TLS,C=UK\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" \ |
| " force_key_usage=0/1 default: off\n" \ |
| " Add KeyUsage even if it is empty\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" \ |
| " force_ns_cert_type=0/1 default: off\n" \ |
| " Add NsCertType even if it is empty\n" \ |
| " md=%%s default: SHA256\n" \ |
| " possible values:\n" \ |
| " MD2, MD4, MD5, RIPEMD160, SHA1,\n" \ |
| " SHA224, SHA256, SHA384, SHA512\n" \ |
| "\n" |
| |
| |
| /* |
| * global options |
| */ |
| struct options |
| { |
| const char *filename; /* filename of the key file */ |
| const char *password; /* password for the key file */ |
| int debug_level; /* level of debugging */ |
| const char *output_file; /* where to store the constructed key file */ |
| const char *subject_name; /* subject name for certificate request */ |
| unsigned char key_usage; /* key usage flags */ |
| int force_key_usage; /* Force adding the KeyUsage extension */ |
| unsigned char ns_cert_type; /* NS cert type */ |
| int force_ns_cert_type; /* Force adding NsCertType extension */ |
| mbedtls_md_type_t md_alg; /* Hash algorithm used for signature. */ |
| } opt; |
| |
| int write_certificate_request( mbedtls_x509write_csr *req, const char *output_file, |
| int (*f_rng)(void *, unsigned char *, size_t), |
| void *p_rng ) |
| { |
| int ret; |
| FILE *f; |
| unsigned char output_buf[4096]; |
| size_t len = 0; |
| |
| memset( output_buf, 0, 4096 ); |
| if( ( ret = mbedtls_x509write_csr_pem( req, output_buf, 4096, f_rng, p_rng ) ) < 0 ) |
| return( ret ); |
| |
| len = strlen( (char *) output_buf ); |
| |
| if( ( f = fopen( output_file, "w" ) ) == NULL ) |
| return( -1 ); |
| |
| if( fwrite( output_buf, 1, len, f ) != len ) |
| { |
| fclose( f ); |
| return( -1 ); |
| } |
| |
| fclose( f ); |
| |
| return( 0 ); |
| } |
| |
| int main( int argc, char *argv[] ) |
| { |
| int ret = 1; |
| int exit_code = MBEDTLS_EXIT_FAILURE; |
| mbedtls_pk_context key; |
| char buf[1024]; |
| int i; |
| char *p, *q, *r; |
| mbedtls_x509write_csr req; |
| mbedtls_entropy_context entropy; |
| mbedtls_ctr_drbg_context ctr_drbg; |
| const char *pers = "csr example app"; |
| |
| /* |
| * Set to sane values |
| */ |
| mbedtls_x509write_csr_init( &req ); |
| mbedtls_pk_init( &key ); |
| mbedtls_ctr_drbg_init( &ctr_drbg ); |
| memset( buf, 0, sizeof( buf ) ); |
| |
| if( argc == 0 ) |
| { |
| usage: |
| mbedtls_printf( USAGE ); |
| goto exit; |
| } |
| |
| opt.filename = DFL_FILENAME; |
| opt.password = DFL_PASSWORD; |
| opt.debug_level = DFL_DEBUG_LEVEL; |
| opt.output_file = DFL_OUTPUT_FILENAME; |
| opt.subject_name = DFL_SUBJECT_NAME; |
| opt.key_usage = DFL_KEY_USAGE; |
| opt.force_key_usage = DFL_FORCE_KEY_USAGE; |
| opt.ns_cert_type = DFL_NS_CERT_TYPE; |
| opt.force_ns_cert_type = DFL_FORCE_NS_CERT_TYPE; |
| opt.md_alg = DFL_MD_ALG; |
| |
| for( i = 1; i < argc; i++ ) |
| { |
| |
| p = argv[i]; |
| if( ( q = strchr( p, '=' ) ) == NULL ) |
| goto usage; |
| *q++ = '\0'; |
| |
| if( strcmp( p, "filename" ) == 0 ) |
| opt.filename = q; |
| else if( strcmp( p, "password" ) == 0 ) |
| opt.password = q; |
| else if( strcmp( p, "output_file" ) == 0 ) |
| opt.output_file = q; |
| else if( strcmp( p, "debug_level" ) == 0 ) |
| { |
| opt.debug_level = atoi( q ); |
| if( opt.debug_level < 0 || opt.debug_level > 65535 ) |
| goto usage; |
| } |
| else if( strcmp( p, "subject_name" ) == 0 ) |
| { |
| opt.subject_name = q; |
| } |
| 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_alg = mbedtls_md_get_type( md_info ); |
| } |
| 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 |
| goto usage; |
| |
| q = r; |
| } |
| } |
| else if( strcmp( p, "force_key_usage" ) == 0 ) |
| { |
| switch( atoi( q ) ) |
| { |
| case 0: opt.force_key_usage = 0; break; |
| case 1: opt.force_key_usage = 1; break; |
| default: goto usage; |
| } |
| } |
| 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 |
| goto usage; |
| |
| q = r; |
| } |
| } |
| else if( strcmp( p, "force_ns_cert_type" ) == 0 ) |
| { |
| switch( atoi( q ) ) |
| { |
| case 0: opt.force_ns_cert_type = 0; break; |
| case 1: opt.force_ns_cert_type = 1; break; |
| default: goto usage; |
| } |
| } |
| else |
| goto usage; |
| } |
| |
| mbedtls_x509write_csr_set_md_alg( &req, opt.md_alg ); |
| |
| if( opt.key_usage || opt.force_key_usage == 1 ) |
| mbedtls_x509write_csr_set_key_usage( &req, opt.key_usage ); |
| |
| if( opt.ns_cert_type || opt.force_ns_cert_type == 1 ) |
| mbedtls_x509write_csr_set_ns_cert_type( &req, opt.ns_cert_type ); |
| |
| /* |
| * 0. Seed the PRNG |
| */ |
| mbedtls_printf( " . Seeding the random number generator..." ); |
| fflush( stdout ); |
| |
| mbedtls_entropy_init( &entropy ); |
| if( ( ret = mbedtls_ctr_drbg_seed( &ctr_drbg, mbedtls_entropy_func, &entropy, |
| (const unsigned char *) pers, |
| strlen( pers ) ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! mbedtls_ctr_drbg_seed returned %d", ret ); |
| goto exit; |
| } |
| |
| mbedtls_printf( " ok\n" ); |
| |
| /* |
| * 1.0. Check the subject name for validity |
| */ |
| mbedtls_printf( " . Checking subject name..." ); |
| fflush( stdout ); |
| |
| if( ( ret = mbedtls_x509write_csr_set_subject_name( &req, opt.subject_name ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! mbedtls_x509write_csr_set_subject_name returned %d", ret ); |
| goto exit; |
| } |
| |
| mbedtls_printf( " ok\n" ); |
| |
| /* |
| * 1.1. Load the key |
| */ |
| mbedtls_printf( " . Loading the private key ..." ); |
| fflush( stdout ); |
| |
| ret = mbedtls_pk_parse_keyfile( &key, opt.filename, opt.password ); |
| |
| if( ret != 0 ) |
| { |
| mbedtls_printf( " failed\n ! mbedtls_pk_parse_keyfile returned %d", ret ); |
| goto exit; |
| } |
| |
| mbedtls_x509write_csr_set_key( &req, &key ); |
| |
| mbedtls_printf( " ok\n" ); |
| |
| /* |
| * 1.2. Writing the request |
| */ |
| mbedtls_printf( " . Writing the certificate request ..." ); |
| fflush( stdout ); |
| |
| if( ( ret = write_certificate_request( &req, opt.output_file, |
| mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 ) |
| { |
| mbedtls_printf( " failed\n ! write_certifcate_request %d", ret ); |
| goto exit; |
| } |
| |
| mbedtls_printf( " ok\n" ); |
| |
| exit_code = MBEDTLS_EXIT_SUCCESS; |
| |
| exit: |
| |
| if( exit_code != MBEDTLS_EXIT_SUCCESS ) |
| { |
| #ifdef MBEDTLS_ERROR_C |
| mbedtls_strerror( ret, buf, sizeof( buf ) ); |
| mbedtls_printf( " - %s\n", buf ); |
| #else |
| mbedtls_printf("\n"); |
| #endif |
| } |
| |
| mbedtls_x509write_csr_free( &req ); |
| mbedtls_pk_free( &key ); |
| mbedtls_ctr_drbg_free( &ctr_drbg ); |
| mbedtls_entropy_free( &entropy ); |
| |
| #if defined(_WIN32) |
| mbedtls_printf( " + Press Enter to exit this program.\n" ); |
| fflush( stdout ); getchar(); |
| #endif |
| |
| mbedtls_exit( exit_code ); |
| } |
| #endif /* MBEDTLS_X509_CSR_WRITE_C && MBEDTLS_PK_PARSE_C && MBEDTLS_FS_IO && |
| MBEDTLS_ENTROPY_C && MBEDTLS_CTR_DRBG_C && MBEDTLS_PEM_WRITE_C */ |
