/*
 *  Root CA reading application
 *
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 */

#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif

#include "mbedtls/platform.h"

#if !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_FS_IO) ||  \
    !defined(MBEDTLS_TIMING_C)
int main(void)
{
    mbedtls_printf("MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_FS_IO and/or "
                   "MBEDTLS_TIMING_C not defined.\n");
    mbedtls_exit(0);
}
#else

#include "mbedtls/error.h"
#include "mbedtls/timing.h"
#include "mbedtls/x509_crt.h"

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

#define DFL_ITERATIONS          1
#define DFL_PRIME_CACHE         1

#define USAGE \
    "\n usage: load_roots param=<>... [--] FILE...\n"   \
    "\n acceptable parameters:\n"                       \
    "    iterations=%%d        Iteration count (not including cache priming); default: 1\n"  \
    "    prime=%%d             Prime the disk read cache? Default: 1 (yes)\n"  \
    "\n"


/*
 * global options
 */
struct options {
    const char **filenames;     /* NULL-terminated list of file names */
    unsigned iterations;        /* Number of iterations to time */
    int prime_cache;            /* Prime the disk read cache? */
} opt;


int read_certificates(const char *const *filenames)
{
    mbedtls_x509_crt cas;
    int ret = 0;
    const char *const *cur;

    mbedtls_x509_crt_init(&cas);

    for (cur = filenames; *cur != NULL; cur++) {
        ret = mbedtls_x509_crt_parse_file(&cas, *cur);
        if (ret != 0) {
#if defined(MBEDTLS_ERROR_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
            char error_message[200];
            mbedtls_strerror(ret, error_message, sizeof(error_message));
            printf("\n%s: -0x%04x (%s)\n",
                   *cur, (unsigned) -ret, error_message);
#else
            printf("\n%s: -0x%04x\n",
                   *cur, (unsigned) -ret);
#endif
            goto exit;
        }
    }

exit:
    mbedtls_x509_crt_free(&cas);
    return ret == 0;
}

int main(int argc, char *argv[])
{
    int exit_code = MBEDTLS_EXIT_FAILURE;
    unsigned i, j;
    struct mbedtls_timing_hr_time timer;
    unsigned long ms;

#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 <= 1) {
        mbedtls_printf(USAGE);
        goto exit;
    }

    opt.filenames = NULL;
    opt.iterations = DFL_ITERATIONS;
    opt.prime_cache = DFL_PRIME_CACHE;

    for (i = 1; i < (unsigned) argc; i++) {
        char *p = argv[i];
        char *q = NULL;

        if (strcmp(p, "--") == 0) {
            break;
        }
        if ((q = strchr(p, '=')) == NULL) {
            break;
        }
        *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, "iterations") == 0) {
            opt.iterations = atoi(q);
        } else if (strcmp(p, "prime") == 0) {
            opt.iterations = atoi(q) != 0;
        } else {
            mbedtls_printf("Unknown option: %s\n", p);
            mbedtls_printf(USAGE);
            goto exit;
        }
    }

    opt.filenames = (const char **) argv + i;
    if (*opt.filenames == 0) {
        mbedtls_printf("Missing list of certificate files to parse\n");
        goto exit;
    }

    mbedtls_printf("Parsing %u certificates", argc - i);
    if (opt.prime_cache) {
        if (!read_certificates(opt.filenames)) {
            goto exit;
        }
        mbedtls_printf(" ");
    }

    (void) mbedtls_timing_get_timer(&timer, 1);
    for (i = 1; i <= opt.iterations; i++) {
        if (!read_certificates(opt.filenames)) {
            goto exit;
        }
        mbedtls_printf(".");
    }
    ms = mbedtls_timing_get_timer(&timer, 0);
    mbedtls_printf("\n%u iterations -> %lu ms\n", opt.iterations, ms);
    exit_code = MBEDTLS_EXIT_SUCCESS;

exit:
#if defined(MBEDTLS_USE_PSA_CRYPTO)
    mbedtls_psa_crypto_free();
#endif /* MBEDTLS_USE_PSA_CRYPTO */
    mbedtls_exit(exit_code);
}
#endif /* necessary configuration */