programs/x509/req_app.c

/*
 *  Certificate request reading application
 *
 *  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"

#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_BIGNUM_C) || !defined(MBEDTLS_RSA_C) ||         \
    !defined(MBEDTLS_X509_CSR_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
    defined(MBEDTLS_X509_REMOVE_INFO)
int main(void)
{
    mbedtls_printf(
        "MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or "
        "MBEDTLS_X509_CSR_PARSE_C and/or MBEDTLS_FS_IO not defined and/or "
        "MBEDTLS_X509_REMOVE_INFO defined.\n");
    mbedtls_exit(0);
}
#else

#    include "mbedtls/x509_csr.h"

#    include <stdio.h>
#    include <stdlib.h>
#    include <string.h>

#    define DFL_FILENAME    "cert.req"
#    define DFL_DEBUG_LEVEL 0

#    define USAGE                                      \
        "\n usage: req_app param=<>...\n"              \
        "\n acceptable parameters:\n"                  \
        "    filename=%%s         default: cert.req\n" \
        "\n"

/*
 * global options
 */
struct options {
    const char *filename; /* filename of the certificate request  */
} opt;

int main(int argc, char *argv[])
{
    int ret = 1;
    int exit_code = MBEDTLS_EXIT_FAILURE;
    unsigned char buf[100000];
    mbedtls_x509_csr csr;
    int i;
    char *p, *q;

    /*
     * Set to sane values
     */
    mbedtls_x509_csr_init(&csr);

    if (argc == 0) {
usage:
        mbedtls_printf(USAGE);
        goto exit;
    }

    opt.filename = DFL_FILENAME;

    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
            goto usage;
    }

    /*
     * 1.1. Load the CSR
     */
    mbedtls_printf("\n  . Loading the CSR ...");
    fflush(stdout);

    ret = mbedtls_x509_csr_parse_file(&csr, opt.filename);

    if (ret != 0) {
        mbedtls_printf(
            " failed\n  !  mbedtls_x509_csr_parse_file returned %d\n\n", ret);
        mbedtls_x509_csr_free(&csr);
        goto exit;
    }

    mbedtls_printf(" ok\n");

    /*
     * 1.2 Print the CSR
     */
    mbedtls_printf("  . CSR information    ...\n");
    ret = mbedtls_x509_csr_info((char *)buf, sizeof(buf) - 1, "      ", &csr);
    if (ret == -1) {
        mbedtls_printf(" failed\n  !  mbedtls_x509_csr_info returned %d\n\n",
                       ret);
        mbedtls_x509_csr_free(&csr);
        goto exit;
    }

    mbedtls_printf("%s\n", buf);

    exit_code = MBEDTLS_EXIT_SUCCESS;

exit:
    mbedtls_x509_csr_free(&csr);

#    if defined(_WIN32)
    mbedtls_printf("  + Press Enter to exit this program.\n");
    fflush(stdout);
    getchar();
#    endif

    mbedtls_exit(exit_code);
}
#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_X509_CSR_PARSE_C && \
          MBEDTLS_FS_IO */