diff options
Diffstat (limited to 'programs/x509/cert_app.c')
| -rw-r--r-- | programs/x509/cert_app.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/programs/x509/cert_app.c b/programs/x509/cert_app.c new file mode 100644 index 00000000000..cb1e5bc4e72 --- /dev/null +++ b/programs/x509/cert_app.c @@ -0,0 +1,456 @@ +/* + * Certificate reading application + * + * Copyright The Mbed TLS Contributors + * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later + */ + +#include "mbedtls/build_info.h" + +#include "mbedtls/platform.h" + +#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_ENTROPY_C) || \ + !defined(MBEDTLS_SSL_TLS_C) || !defined(MBEDTLS_SSL_CLI_C) || \ + !defined(MBEDTLS_NET_C) || !defined(MBEDTLS_RSA_C) || \ + !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) || \ + !defined(MBEDTLS_CTR_DRBG_C) || defined(MBEDTLS_X509_REMOVE_INFO) +int main(void) +{ + mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_ENTROPY_C and/or " + "MBEDTLS_SSL_TLS_C and/or MBEDTLS_SSL_CLI_C and/or " + "MBEDTLS_NET_C and/or MBEDTLS_RSA_C and/or " + "MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_FS_IO and/or " + "MBEDTLS_CTR_DRBG_C not defined and/or MBEDTLS_X509_REMOVE_INFO defined.\n"); + mbedtls_exit(0); +} +#else + +#include "mbedtls/entropy.h" +#include "mbedtls/ctr_drbg.h" +#include "mbedtls/net_sockets.h" +#include "mbedtls/ssl.h" +#include "mbedtls/x509.h" +#include "mbedtls/debug.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#define MODE_NONE 0 +#define MODE_FILE 1 +#define MODE_SSL 2 + +#define DFL_MODE MODE_NONE +#define DFL_FILENAME "cert.crt" +#define DFL_CA_FILE "" +#define DFL_CRL_FILE "" +#define DFL_CA_PATH "" +#define DFL_SERVER_NAME "localhost" +#define DFL_SERVER_PORT "4433" +#define DFL_DEBUG_LEVEL 0 +#define DFL_PERMISSIVE 0 + +#define USAGE_IO \ + " ca_file=%%s The single file containing the top-level CA(s) you fully trust\n" \ + " default: \"\" (none)\n" \ + " crl_file=%%s The single CRL file you want to use\n" \ + " default: \"\" (none)\n" \ + " ca_path=%%s The path containing the top-level CA(s) you fully trust\n" \ + " default: \"\" (none) (overrides ca_file)\n" + +#define USAGE \ + "\n usage: cert_app param=<>...\n" \ + "\n acceptable parameters:\n" \ + " mode=file|ssl default: none\n" \ + " filename=%%s default: cert.crt\n" \ + USAGE_IO \ + " server_name=%%s default: localhost\n" \ + " server_port=%%d default: 4433\n" \ + " debug_level=%%d default: 0 (disabled)\n" \ + " permissive=%%d default: 0 (disabled)\n" \ + "\n" + + +/* + * global options + */ +struct options { + int mode; /* the mode to run the application in */ + const char *filename; /* filename of the certificate file */ + const char *ca_file; /* the file with the CA certificate(s) */ + const char *crl_file; /* the file with the CRL to use */ + const char *ca_path; /* the path with the CA certificate(s) reside */ + const char *server_name; /* hostname of the server (client only) */ + const char *server_port; /* port on which the ssl service runs */ + int debug_level; /* level of debugging */ + int permissive; /* permissive parsing */ +} opt; + +static void my_debug(void *ctx, int level, + const char *file, int line, + const char *str) +{ + ((void) level); + + mbedtls_fprintf((FILE *) ctx, "%s:%04d: %s", file, line, str); + fflush((FILE *) ctx); +} + +static int my_verify(void *data, mbedtls_x509_crt *crt, int depth, uint32_t *flags) +{ + char buf[1024]; + ((void) data); + + mbedtls_printf("\nVerify requested for (Depth %d):\n", depth); + mbedtls_x509_crt_info(buf, sizeof(buf) - 1, "", crt); + mbedtls_printf("%s", buf); + + if ((*flags) == 0) { + mbedtls_printf(" This certificate has no flags\n"); + } else { + mbedtls_x509_crt_verify_info(buf, sizeof(buf), " ! ", *flags); + mbedtls_printf("%s\n", buf); + } + + return 0; +} + +int main(int argc, char *argv[]) +{ + int ret = 1; + int exit_code = MBEDTLS_EXIT_FAILURE; + mbedtls_net_context server_fd; + unsigned char buf[1024]; + mbedtls_entropy_context entropy; + mbedtls_ctr_drbg_context ctr_drbg; + mbedtls_ssl_context ssl; + mbedtls_ssl_config conf; + mbedtls_x509_crt cacert; + mbedtls_x509_crl cacrl; + int i, j; + uint32_t flags; + int verify = 0; + char *p, *q; + const char *pers = "cert_app"; + + /* + * Set to sane values + */ + mbedtls_net_init(&server_fd); + mbedtls_ctr_drbg_init(&ctr_drbg); + mbedtls_ssl_init(&ssl); + mbedtls_ssl_config_init(&conf); + mbedtls_x509_crt_init(&cacert); + mbedtls_entropy_init(&entropy); +#if defined(MBEDTLS_X509_CRL_PARSE_C) + mbedtls_x509_crl_init(&cacrl); +#else + /* Zeroize structure as CRL parsing is not supported and we have to pass + it to the verify function */ + memset(&cacrl, 0, sizeof(mbedtls_x509_crl)); +#endif + +#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.mode = DFL_MODE; + opt.filename = DFL_FILENAME; + opt.ca_file = DFL_CA_FILE; + opt.crl_file = DFL_CRL_FILE; + opt.ca_path = DFL_CA_PATH; + opt.server_name = DFL_SERVER_NAME; + opt.server_port = DFL_SERVER_PORT; + opt.debug_level = DFL_DEBUG_LEVEL; + opt.permissive = DFL_PERMISSIVE; + + for (i = 1; i < argc; i++) { + p = argv[i]; + if ((q = strchr(p, '=')) == NULL) { + goto usage; + } + *q++ = '\0'; + + for (j = 0; p + j < q; j++) { + if (argv[i][j] >= 'A' && argv[i][j] <= 'Z') { + argv[i][j] |= 0x20; + } + } + + if (strcmp(p, "mode") == 0) { + if (strcmp(q, "file") == 0) { + opt.mode = MODE_FILE; + } else if (strcmp(q, "ssl") == 0) { + opt.mode = MODE_SSL; + } else { + goto usage; + } + } else if (strcmp(p, "filename") == 0) { + opt.filename = q; + } else if (strcmp(p, "ca_file") == 0) { + opt.ca_file = q; + } else if (strcmp(p, "crl_file") == 0) { + opt.crl_file = q; + } else if (strcmp(p, "ca_path") == 0) { + opt.ca_path = q; + } else if (strcmp(p, "server_name") == 0) { + opt.server_name = q; + } else if (strcmp(p, "server_port") == 0) { + opt.server_port = 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, "permissive") == 0) { + opt.permissive = atoi(q); + if (opt.permissive < 0 || opt.permissive > 1) { + goto usage; + } + } else { + goto usage; + } + } + + /* + * 1.1. Load the trusted CA + */ + mbedtls_printf(" . Loading the CA root certificate ..."); + fflush(stdout); + + if (strlen(opt.ca_path)) { + if ((ret = mbedtls_x509_crt_parse_path(&cacert, opt.ca_path)) < 0) { + mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse_path returned -0x%x\n\n", + (unsigned int) -ret); + goto exit; + } + + verify = 1; + } else if (strlen(opt.ca_file)) { + if ((ret = mbedtls_x509_crt_parse_file(&cacert, opt.ca_file)) < 0) { + mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse_file returned -0x%x\n\n", + (unsigned int) -ret); + goto exit; + } + + verify = 1; + } + + mbedtls_printf(" ok (%d skipped)\n", ret); + +#if defined(MBEDTLS_X509_CRL_PARSE_C) + if (strlen(opt.crl_file)) { + if ((ret = mbedtls_x509_crl_parse_file(&cacrl, opt.crl_file)) != 0) { + mbedtls_printf(" failed\n ! mbedtls_x509_crl_parse returned -0x%x\n\n", + (unsigned int) -ret); + goto exit; + } + + verify = 1; + } +#endif + + if (opt.mode == MODE_FILE) { + mbedtls_x509_crt crt; + mbedtls_x509_crt *cur = &crt; + mbedtls_x509_crt_init(&crt); + + /* + * 1.1. Load the certificate(s) + */ + mbedtls_printf("\n . Loading the certificate(s) ..."); + fflush(stdout); + + ret = mbedtls_x509_crt_parse_file(&crt, opt.filename); + + if (ret < 0) { + mbedtls_printf(" failed\n ! mbedtls_x509_crt_parse_file returned %d\n\n", ret); + mbedtls_x509_crt_free(&crt); + goto exit; + } + + if (opt.permissive == 0 && ret > 0) { + mbedtls_printf( + " failed\n ! mbedtls_x509_crt_parse failed to parse %d certificates\n\n", + ret); + mbedtls_x509_crt_free(&crt); + goto exit; + } + + mbedtls_printf(" ok\n"); + + /* + * 1.2 Print the certificate(s) + */ + while (cur != NULL) { + mbedtls_printf(" . Peer certificate information ...\n"); + ret = mbedtls_x509_crt_info((char *) buf, sizeof(buf) - 1, " ", + cur); + if (ret == -1) { + mbedtls_printf(" failed\n ! mbedtls_x509_crt_info returned %d\n\n", ret); + mbedtls_x509_crt_free(&crt); + goto exit; + } + + mbedtls_printf("%s\n", buf); + + cur = cur->next; + } + + /* + * 1.3 Verify the certificate + */ + if (verify) { + mbedtls_printf(" . Verifying X.509 certificate..."); + + if ((ret = mbedtls_x509_crt_verify(&crt, &cacert, &cacrl, NULL, &flags, + my_verify, NULL)) != 0) { + char vrfy_buf[512]; + + mbedtls_printf(" failed\n"); + + mbedtls_x509_crt_verify_info(vrfy_buf, sizeof(vrfy_buf), " ! ", flags); + + mbedtls_printf("%s\n", vrfy_buf); + } else { + mbedtls_printf(" ok\n"); + } + } + + mbedtls_x509_crt_free(&crt); + } else if (opt.mode == MODE_SSL) { + /* + * 1. Initialize the RNG and the session data + */ + mbedtls_printf("\n . 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_printf(" failed\n ! mbedtls_ctr_drbg_seed returned %d\n", ret); + goto ssl_exit; + } + + mbedtls_printf(" ok\n"); + +#if defined(MBEDTLS_DEBUG_C) + mbedtls_debug_set_threshold(opt.debug_level); +#endif + + /* + * 2. Start the connection + */ + mbedtls_printf(" . SSL connection to tcp/%s/%s...", opt.server_name, + opt.server_port); + fflush(stdout); + + if ((ret = mbedtls_net_connect(&server_fd, opt.server_name, + opt.server_port, MBEDTLS_NET_PROTO_TCP)) != 0) { + mbedtls_printf(" failed\n ! mbedtls_net_connect returned %d\n\n", ret); + goto ssl_exit; + } + + /* + * 3. Setup stuff + */ + if ((ret = mbedtls_ssl_config_defaults(&conf, + MBEDTLS_SSL_IS_CLIENT, + MBEDTLS_SSL_TRANSPORT_STREAM, + MBEDTLS_SSL_PRESET_DEFAULT)) != 0) { + mbedtls_printf(" failed\n ! mbedtls_ssl_config_defaults returned %d\n\n", ret); + goto exit; + } + + if (verify) { + mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_REQUIRED); + mbedtls_ssl_conf_ca_chain(&conf, &cacert, NULL); + mbedtls_ssl_conf_verify(&conf, my_verify, NULL); + } else { + mbedtls_ssl_conf_authmode(&conf, MBEDTLS_SSL_VERIFY_NONE); + } + + mbedtls_ssl_conf_rng(&conf, mbedtls_ctr_drbg_random, &ctr_drbg); + mbedtls_ssl_conf_dbg(&conf, my_debug, stdout); + + if ((ret = mbedtls_ssl_setup(&ssl, &conf)) != 0) { + mbedtls_printf(" failed\n ! mbedtls_ssl_setup returned %d\n\n", ret); + goto ssl_exit; + } + + if ((ret = mbedtls_ssl_set_hostname(&ssl, opt.server_name)) != 0) { + mbedtls_printf(" failed\n ! mbedtls_ssl_set_hostname returned %d\n\n", ret); + goto ssl_exit; + } + + mbedtls_ssl_set_bio(&ssl, &server_fd, mbedtls_net_send, mbedtls_net_recv, NULL); + + /* + * 4. Handshake + */ + while ((ret = mbedtls_ssl_handshake(&ssl)) != 0) { + if (ret != MBEDTLS_ERR_SSL_WANT_READ && ret != MBEDTLS_ERR_SSL_WANT_WRITE) { + mbedtls_printf(" failed\n ! mbedtls_ssl_handshake returned %d\n\n", ret); + goto ssl_exit; + } + } + + mbedtls_printf(" ok\n"); + + /* + * 5. Print the certificate + */ +#if !defined(MBEDTLS_SSL_KEEP_PEER_CERTIFICATE) + mbedtls_printf(" . Peer certificate information ... skipped\n"); +#else + mbedtls_printf(" . Peer certificate information ...\n"); + ret = mbedtls_x509_crt_info((char *) buf, sizeof(buf) - 1, " ", + mbedtls_ssl_get_peer_cert(&ssl)); + if (ret == -1) { + mbedtls_printf(" failed\n ! mbedtls_x509_crt_info returned %d\n\n", ret); + goto ssl_exit; + } + + mbedtls_printf("%s\n", buf); +#endif /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE */ + + mbedtls_ssl_close_notify(&ssl); + +ssl_exit: + mbedtls_ssl_free(&ssl); + mbedtls_ssl_config_free(&conf); + } else { + goto usage; + } + + exit_code = MBEDTLS_EXIT_SUCCESS; + +exit: + + mbedtls_net_free(&server_fd); + mbedtls_x509_crt_free(&cacert); +#if defined(MBEDTLS_X509_CRL_PARSE_C) + mbedtls_x509_crl_free(&cacrl); +#endif + 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_BIGNUM_C && MBEDTLS_ENTROPY_C && MBEDTLS_SSL_TLS_C && + MBEDTLS_SSL_CLI_C && MBEDTLS_NET_C && MBEDTLS_RSA_C && + MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_FS_IO && MBEDTLS_CTR_DRBG_C */ |