tests/suites/test_suite_x509parse.function

/* BEGIN_HEADER */
#include "mbedtls/bignum.h"
#include "mbedtls/x509.h"
#include "mbedtls/x509_crt.h"
#include "mbedtls/x509_crl.h"
#include "mbedtls/x509_csr.h"
#include "mbedtls/pem.h"
#include "mbedtls/oid.h"
#include "mbedtls/base64.h"
#include "mbedtls/error.h"
#include "mbedtls/pk.h"
#include "string.h"

#include "mbedtls/legacy_or_psa.h"

#if MBEDTLS_X509_MAX_INTERMEDIATE_CA > 19
#error "The value of MBEDTLS_X509_MAX_INTERMEDIATE_C is larger \
    than the current threshold 19. To test larger values, please \
    adapt the script tests/data_files/dir-max/long.sh."
#endif

/* Test-only profile allowing all digests, PK algorithms, and curves. */
const mbedtls_x509_crt_profile profile_all =
{
    0xFFFFFFFF, /* Any MD        */
    0xFFFFFFFF, /* Any PK alg    */
    0xFFFFFFFF, /* Any curve     */
    1024,
};

/* Profile for backward compatibility. Allows SHA-1, unlike the default
   profile. */
const mbedtls_x509_crt_profile compat_profile =
{
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA1) |
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_RIPEMD160) |
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA224) |
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA256) |
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA384) |
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA512),
    0xFFFFFFFF, /* Any PK alg    */
    0xFFFFFFFF, /* Any curve     */
    1024,
};

const mbedtls_x509_crt_profile profile_rsa3072 =
{
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA256) |
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA384) |
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA512),
    MBEDTLS_X509_ID_FLAG(MBEDTLS_PK_RSA),
    0,
    3072,
};

const mbedtls_x509_crt_profile profile_sha512 =
{
    MBEDTLS_X509_ID_FLAG(MBEDTLS_MD_SHA512),
    0xFFFFFFFF, /* Any PK alg    */
    0xFFFFFFFF, /* Any curve     */
    1024,
};

int verify_none(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
{
    ((void) data);
    ((void) crt);
    ((void) certificate_depth);
    *flags |= MBEDTLS_X509_BADCERT_OTHER;

    return 0;
}

int verify_all(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
{
    ((void) data);
    ((void) crt);
    ((void) certificate_depth);
    *flags = 0;

    return 0;
}

#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
int ca_callback_fail(void *data, mbedtls_x509_crt const *child, mbedtls_x509_crt **candidates)
{
    ((void) data);
    ((void) child);
    ((void) candidates);

    return -1;
}
#if defined(MBEDTLS_X509_CRT_PARSE_C)
int ca_callback(void *data, mbedtls_x509_crt const *child,
                mbedtls_x509_crt **candidates)
{
    int ret = 0;
    mbedtls_x509_crt *ca = (mbedtls_x509_crt *) data;
    mbedtls_x509_crt *first;

    /* This is a test-only implementation of the CA callback
     * which always returns the entire list of trusted certificates.
     * Production implementations managing a large number of CAs
     * should use an efficient presentation and lookup for the
     * set of trusted certificates (such as a hashtable) and only
     * return those trusted certificates which satisfy basic
     * parental checks, such as the matching of child `Issuer`
     * and parent `Subject` field. */
    ((void) child);

    first = mbedtls_calloc(1, sizeof(mbedtls_x509_crt));
    if (first == NULL) {
        ret = -1;
        goto exit;
    }
    mbedtls_x509_crt_init(first);

    if (mbedtls_x509_crt_parse_der(first, ca->raw.p, ca->raw.len) != 0) {
        ret = -1;
        goto exit;
    }

    while (ca->next != NULL) {
        ca = ca->next;
        if (mbedtls_x509_crt_parse_der(first, ca->raw.p, ca->raw.len) != 0) {
            ret = -1;
            goto exit;
        }
    }

exit:

    if (ret != 0) {
        mbedtls_x509_crt_free(first);
        mbedtls_free(first);
        first = NULL;
    }

    *candidates = first;
    return ret;
}
#endif /* MBEDTLS_X509_CRT_PARSE_C */
#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */

int verify_fatal(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
{
    int *levels = (int *) data;

    ((void) crt);
    ((void) certificate_depth);

    /* Simulate a fatal error in the callback */
    if (*levels & (1 << certificate_depth)) {
        *flags |= (1 << certificate_depth);
        return -1 - certificate_depth;
    }

    return 0;
}

/* strsep() not available on Windows */
char *mystrsep(char **stringp, const char *delim)
{
    const char *p;
    char *ret = *stringp;

    if (*stringp == NULL) {
        return NULL;
    }

    for (;; (*stringp)++) {
        if (**stringp == '\0') {
            *stringp = NULL;
            goto done;
        }

        for (p = delim; *p != '\0'; p++) {
            if (**stringp == *p) {
                **stringp = '\0';
                (*stringp)++;
                goto done;
            }
        }
    }

done:
    return ret;
}

#if defined(MBEDTLS_X509_CRT_PARSE_C)
typedef struct {
    char buf[512];
    char *p;
} verify_print_context;

void verify_print_init(verify_print_context *ctx)
{
    memset(ctx, 0, sizeof(verify_print_context));
    ctx->p = ctx->buf;
}

int verify_print(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
{
    int ret;
    verify_print_context *ctx = (verify_print_context *) data;
    char *p = ctx->p;
    size_t n = ctx->buf + sizeof(ctx->buf) - ctx->p;
    ((void) flags);

    ret = mbedtls_snprintf(p, n, "depth %d - serial ", certificate_depth);
    MBEDTLS_X509_SAFE_SNPRINTF;

    ret = mbedtls_x509_serial_gets(p, n, &crt->serial);
    MBEDTLS_X509_SAFE_SNPRINTF;

    ret = mbedtls_snprintf(p, n, " - subject ");
    MBEDTLS_X509_SAFE_SNPRINTF;

    ret = mbedtls_x509_dn_gets(p, n, &crt->subject);
    MBEDTLS_X509_SAFE_SNPRINTF;

    ret = mbedtls_snprintf(p, n, " - flags 0x%08x\n", *flags);
    MBEDTLS_X509_SAFE_SNPRINTF;

    ctx->p = p;

    return 0;
}

int verify_parse_san(mbedtls_x509_subject_alternative_name *san,
                     char **buf, size_t *size)
{
    int ret;
    size_t i;
    char *p = *buf;
    size_t n = *size;

    ret = mbedtls_snprintf(p, n, "type : %d", san->type);
    MBEDTLS_X509_SAFE_SNPRINTF;

    switch (san->type) {
        case (MBEDTLS_X509_SAN_OTHER_NAME):
            ret = mbedtls_snprintf(p, n, "\notherName :");
            MBEDTLS_X509_SAFE_SNPRINTF;

            if (MBEDTLS_OID_CMP(MBEDTLS_OID_ON_HW_MODULE_NAME,
                                &san->san.other_name.value.hardware_module_name.oid) != 0) {
                ret = mbedtls_snprintf(p, n, " hardware module name :");
                MBEDTLS_X509_SAFE_SNPRINTF;
                ret = mbedtls_snprintf(p, n, " hardware type : ");
                MBEDTLS_X509_SAFE_SNPRINTF;

                ret = mbedtls_oid_get_numeric_string(p,
                                                     n,
                                                     &san->san.other_name.value.hardware_module_name.oid);
                MBEDTLS_X509_SAFE_SNPRINTF;

                ret = mbedtls_snprintf(p, n, ", hardware serial number : ");
                MBEDTLS_X509_SAFE_SNPRINTF;

                for (i = 0; i < san->san.other_name.value.hardware_module_name.val.len; i++) {
                    ret = mbedtls_snprintf(p,
                                           n,
                                           "%02X",
                                           san->san.other_name.value.hardware_module_name.val.p[i]);
                    MBEDTLS_X509_SAFE_SNPRINTF;
                }
            }
            break;/* MBEDTLS_OID_ON_HW_MODULE_NAME */
        case (MBEDTLS_X509_SAN_DNS_NAME):
            ret = mbedtls_snprintf(p, n, "\ndNSName : ");
            MBEDTLS_X509_SAFE_SNPRINTF;
            if (san->san.unstructured_name.len >= n) {
                *p = '\0';
                return MBEDTLS_ERR_X509_BUFFER_TOO_SMALL;
            }
            n -= san->san.unstructured_name.len;
            for (i = 0; i < san->san.unstructured_name.len; i++) {
                *p++ = san->san.unstructured_name.p[i];
            }
            break;/* MBEDTLS_X509_SAN_DNS_NAME */

        default:
            /*
             * Should not happen.
             */
            return -1;
    }
    ret = mbedtls_snprintf(p, n, "\n");
    MBEDTLS_X509_SAFE_SNPRINTF;

    *size = n;
    *buf = p;

    return 0;
}

int parse_crt_ext_cb(void *p_ctx, mbedtls_x509_crt const *crt, mbedtls_x509_buf const *oid,
                     int critical, const unsigned char *cp, const unsigned char *end)
{
    (void) crt;
    (void) critical;
    mbedtls_x509_buf *new_oid = (mbedtls_x509_buf *) p_ctx;
    if (oid->tag == MBEDTLS_ASN1_OID &&
        MBEDTLS_OID_CMP(MBEDTLS_OID_CERTIFICATE_POLICIES, oid) == 0) {
        /* Handle unknown certificate policy */
        int ret, parse_ret = 0;
        size_t len;
        unsigned char **p = (unsigned char **) &cp;

        /* Get main sequence tag */
        ret = mbedtls_asn1_get_tag(p, end, &len,
                                   MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE);
        if (ret != 0) {
            return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret);
        }

        if (*p + len != end) {
            return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
                                     MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
        }

        /*
         * Cannot be an empty sequence.
         */
        if (len == 0) {
            return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
                                     MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
        }

        while (*p < end) {
            const unsigned char *policy_end;

            /*
             * Get the policy sequence
             */
            if ((ret = mbedtls_asn1_get_tag(p, end, &len,
                                            MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE)) !=
                0) {
                return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret);
            }

            policy_end = *p + len;

            if ((ret = mbedtls_asn1_get_tag(p, policy_end, &len,
                                            MBEDTLS_ASN1_OID)) != 0) {
                return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret);
            }

            /*
             * Recognize exclusively the policy with OID 1
             */
            if (len != 1 || *p[0] != 1) {
                parse_ret = MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE;
            }

            *p += len;

            /*
             * If there is an optional qualifier, then *p < policy_end
             * Check the Qualifier len to verify it doesn't exceed policy_end.
             */
            if (*p < policy_end) {
                if ((ret = mbedtls_asn1_get_tag(p, policy_end, &len,
                                                MBEDTLS_ASN1_CONSTRUCTED |
                                                MBEDTLS_ASN1_SEQUENCE)) != 0) {
                    return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret);
                }
                /*
                 * Skip the optional policy qualifiers.
                 */
                *p += len;
            }

            if (*p != policy_end) {
                return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
                                         MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
            }
        }

        if (*p != end) {
            return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
                                     MBEDTLS_ERR_ASN1_LENGTH_MISMATCH);
        }

        return parse_ret;
    } else if (new_oid != NULL && new_oid->tag == oid->tag && new_oid->len == oid->len &&
               memcmp(new_oid->p, oid->p, oid->len) == 0) {
        return 0;
    } else {
        return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
                                 MBEDTLS_ERR_ASN1_UNEXPECTED_TAG);
    }
}
#endif /* MBEDTLS_X509_CRT_PARSE_C */
/* END_HEADER */

/* BEGIN_DEPENDENCIES
 * depends_on:MBEDTLS_BIGNUM_C
 * END_DEPENDENCIES
 */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C */
void x509_accessor_ext_types(int ext_type, int has_ext_type)
{
    mbedtls_x509_crt crt;
    int expected_result = ext_type & has_ext_type;

    mbedtls_x509_crt_init(&crt);

    crt.ext_types = ext_type;

    TEST_ASSERT(mbedtls_x509_crt_has_ext_type(&crt, has_ext_type) == expected_result);

    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
void x509_parse_san(char *crt_file, char *result_str)
{
    int ret;
    mbedtls_x509_crt   crt;
    mbedtls_x509_subject_alternative_name san;
    mbedtls_x509_sequence *cur = NULL;
    char buf[2000];
    char *p = buf;
    size_t n = sizeof(buf);

    mbedtls_x509_crt_init(&crt);
    memset(buf, 0, 2000);

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);

    if (crt.ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME) {
        cur = &crt.subject_alt_names;
        while (cur != NULL) {
            ret = mbedtls_x509_parse_subject_alt_name(&cur->buf, &san);
            TEST_ASSERT(ret == 0 || ret == MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE);
            /*
             * If san type not supported, ignore.
             */
            if (ret == 0) {
                TEST_ASSERT(verify_parse_san(&san, &p, &n) == 0);
            }
            cur = cur->next;
        }
    }

    TEST_ASSERT(strcmp(buf, result_str) == 0);

exit:

    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:!MBEDTLS_X509_REMOVE_INFO:MBEDTLS_X509_CRT_PARSE_C */
void x509_cert_info(char *crt_file, char *result_str)
{
    mbedtls_x509_crt   crt;
    char buf[2000];
    int res;

    mbedtls_x509_crt_init(&crt);
    memset(buf, 0, 2000);

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);
    res = mbedtls_x509_crt_info(buf, 2000, "", &crt);

    TEST_ASSERT(res != -1);
    TEST_ASSERT(res != -2);

    TEST_ASSERT(strcmp(buf, result_str) == 0);

exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRL_PARSE_C:!MBEDTLS_X509_REMOVE_INFO */
void mbedtls_x509_crl_info(char *crl_file, char *result_str)
{
    mbedtls_x509_crl   crl;
    char buf[2000];
    int res;

    mbedtls_x509_crl_init(&crl);
    memset(buf, 0, 2000);

    TEST_ASSERT(mbedtls_x509_crl_parse_file(&crl, crl_file) == 0);
    res = mbedtls_x509_crl_info(buf, 2000, "", &crl);

    TEST_ASSERT(res != -1);
    TEST_ASSERT(res != -2);

    TEST_ASSERT(strcmp(buf, result_str) == 0);

exit:
    mbedtls_x509_crl_free(&crl);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRL_PARSE_C */
void mbedtls_x509_crl_parse(char *crl_file, int result)
{
    mbedtls_x509_crl   crl;
    char buf[2000];

    mbedtls_x509_crl_init(&crl);
    memset(buf, 0, 2000);

    TEST_ASSERT(mbedtls_x509_crl_parse_file(&crl, crl_file) == result);

exit:
    mbedtls_x509_crl_free(&crl);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CSR_PARSE_C:!MBEDTLS_X509_REMOVE_INFO */
void mbedtls_x509_csr_info(char *csr_file, char *result_str)
{
    mbedtls_x509_csr   csr;
    char buf[2000];
    int res;

    mbedtls_x509_csr_init(&csr);
    memset(buf, 0, 2000);

    TEST_ASSERT(mbedtls_x509_csr_parse_file(&csr, csr_file) == 0);
    res = mbedtls_x509_csr_info(buf, 2000, "", &csr);

    TEST_ASSERT(res != -1);
    TEST_ASSERT(res != -2);

    TEST_ASSERT(strcmp(buf, result_str) == 0);

exit:
    mbedtls_x509_csr_free(&csr);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C:!MBEDTLS_X509_REMOVE_INFO */
void x509_verify_info(int flags, char *prefix, char *result_str)
{
    char buf[2000];
    int res;

    memset(buf, 0, sizeof(buf));

    res = mbedtls_x509_crt_verify_info(buf, sizeof(buf), prefix, flags);

    TEST_ASSERT(res >= 0);

    TEST_ASSERT(strcmp(buf, result_str) == 0);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C:MBEDTLS_X509_CRL_PARSE_C:MBEDTLS_ECP_RESTARTABLE:MBEDTLS_ECDSA_C */
void x509_verify_restart(char *crt_file, char *ca_file,
                         int result, int flags_result,
                         int max_ops, int min_restart, int max_restart)
{
    int ret, cnt_restart;
    mbedtls_x509_crt_restart_ctx rs_ctx;
    mbedtls_x509_crt crt;
    mbedtls_x509_crt ca;
    uint32_t flags = 0;

    /*
     * See comments on ecp_test_vect_restart() for op count precision.
     *
     * For reference, with mbed TLS 2.6 and default settings:
     * - ecdsa_verify() for P-256:  ~  6700
     * - ecdsa_verify() for P-384:  ~ 18800
     * - x509_verify() for server5 -> test-ca2:             ~ 18800
     * - x509_verify() for server10 -> int-ca3 -> int-ca2:  ~ 25500
     */

    mbedtls_x509_crt_restart_init(&rs_ctx);
    mbedtls_x509_crt_init(&crt);
    mbedtls_x509_crt_init(&ca);

    USE_PSA_INIT();

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);
    TEST_ASSERT(mbedtls_x509_crt_parse_file(&ca, ca_file) == 0);

    mbedtls_ecp_set_max_ops(max_ops);

    cnt_restart = 0;
    do {
        ret = mbedtls_x509_crt_verify_restartable(&crt, &ca, NULL,
                                                  &mbedtls_x509_crt_profile_default, NULL, &flags,
                                                  NULL, NULL, &rs_ctx);
    } while (ret == MBEDTLS_ERR_ECP_IN_PROGRESS && ++cnt_restart);

    TEST_ASSERT(ret == result);
    TEST_ASSERT(flags == (uint32_t) flags_result);

    TEST_ASSERT(cnt_restart >= min_restart);
    TEST_ASSERT(cnt_restart <= max_restart);

    /* Do we leak memory when aborting? */
    ret = mbedtls_x509_crt_verify_restartable(&crt, &ca, NULL,
                                              &mbedtls_x509_crt_profile_default, NULL, &flags,
                                              NULL, NULL, &rs_ctx);
    TEST_ASSERT(ret == result || ret == MBEDTLS_ERR_ECP_IN_PROGRESS);

exit:
    mbedtls_x509_crt_restart_free(&rs_ctx);
    mbedtls_x509_crt_free(&crt);
    mbedtls_x509_crt_free(&ca);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C:MBEDTLS_X509_CRL_PARSE_C */
void x509_verify(char *crt_file, char *ca_file, char *crl_file,
                 char *cn_name_str, int result, int flags_result,
                 char *profile_str,
                 char *verify_callback)
{
    mbedtls_x509_crt   crt;
    mbedtls_x509_crt   ca;
    mbedtls_x509_crl    crl;
    uint32_t         flags = 0;
    int         res;
    int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *) = NULL;
    char *cn_name = NULL;
    const mbedtls_x509_crt_profile *profile;

    mbedtls_x509_crt_init(&crt);
    mbedtls_x509_crt_init(&ca);
    mbedtls_x509_crl_init(&crl);

    USE_PSA_INIT();

    if (strcmp(cn_name_str, "NULL") != 0) {
        cn_name = cn_name_str;
    }

    if (strcmp(profile_str, "") == 0) {
        profile = &mbedtls_x509_crt_profile_default;
    } else if (strcmp(profile_str, "next") == 0) {
        profile = &mbedtls_x509_crt_profile_next;
    } else if (strcmp(profile_str, "suite_b") == 0) {
        profile = &mbedtls_x509_crt_profile_suiteb;
    } else if (strcmp(profile_str, "compat") == 0) {
        profile = &compat_profile;
    } else if (strcmp(profile_str, "all") == 0) {
        profile = &profile_all;
    } else {
        TEST_ASSERT("Unknown algorithm profile" == 0);
    }

    if (strcmp(verify_callback, "NULL") == 0) {
        f_vrfy = NULL;
    } else if (strcmp(verify_callback, "verify_none") == 0) {
        f_vrfy = verify_none;
    } else if (strcmp(verify_callback, "verify_all") == 0) {
        f_vrfy = verify_all;
    } else {
        TEST_ASSERT("No known verify callback selected" == 0);
    }

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);
    TEST_ASSERT(mbedtls_x509_crt_parse_file(&ca, ca_file) == 0);
    TEST_ASSERT(mbedtls_x509_crl_parse_file(&crl, crl_file) == 0);

    res = mbedtls_x509_crt_verify_with_profile(&crt,
                                               &ca,
                                               &crl,
                                               profile,
                                               cn_name,
                                               &flags,
                                               f_vrfy,
                                               NULL);

    TEST_EQUAL(res, result);
    TEST_EQUAL(flags, (uint32_t) flags_result);

#if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
    /* CRLs aren't supported with CA callbacks, so skip the CA callback
     * version of the test if CRLs are in use. */
    if (crl_file == NULL || strcmp(crl_file, "") == 0) {
        flags = 0;

        res = mbedtls_x509_crt_verify_with_ca_cb(&crt,
                                                 ca_callback,
                                                 &ca,
                                                 profile,
                                                 cn_name,
                                                 &flags,
                                                 f_vrfy,
                                                 NULL);

        TEST_ASSERT(res == (result));
        TEST_ASSERT(flags == (uint32_t) (flags_result));
    }
#endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
exit:
    mbedtls_x509_crt_free(&crt);
    mbedtls_x509_crt_free(&ca);
    mbedtls_x509_crl_free(&crl);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C:MBEDTLS_X509_CRL_PARSE_C:MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
void x509_verify_ca_cb_failure(char *crt_file, char *ca_file, char *name,
                               int exp_ret)
{
    int ret;
    mbedtls_x509_crt crt;
    mbedtls_x509_crt ca;
    uint32_t flags = 0;

    mbedtls_x509_crt_init(&crt);
    mbedtls_x509_crt_init(&ca);

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);
    TEST_ASSERT(mbedtls_x509_crt_parse_file(&ca, ca_file) == 0);

    if (strcmp(name, "NULL") == 0) {
        name = NULL;
    }

    ret = mbedtls_x509_crt_verify_with_ca_cb(&crt, ca_callback_fail, &ca,
                                             &compat_profile, name, &flags,
                                             NULL, NULL);

    TEST_ASSERT(ret == exp_ret);
    TEST_ASSERT(flags == (uint32_t) (-1));
exit:
    mbedtls_x509_crt_free(&crt);
    mbedtls_x509_crt_free(&ca);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
void x509_verify_callback(char *crt_file, char *ca_file, char *name,
                          int exp_ret, char *exp_vrfy_out)
{
    int ret;
    mbedtls_x509_crt crt;
    mbedtls_x509_crt ca;
    uint32_t flags = 0;
    verify_print_context vrfy_ctx;

    mbedtls_x509_crt_init(&crt);
    mbedtls_x509_crt_init(&ca);
    verify_print_init(&vrfy_ctx);

    USE_PSA_INIT();

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);
    TEST_ASSERT(mbedtls_x509_crt_parse_file(&ca, ca_file) == 0);

    if (strcmp(name, "NULL") == 0) {
        name = NULL;
    }

    ret = mbedtls_x509_crt_verify_with_profile(&crt, &ca, NULL,
                                               &compat_profile,
                                               name, &flags,
                                               verify_print, &vrfy_ctx);

    TEST_ASSERT(ret == exp_ret);
    TEST_ASSERT(strcmp(vrfy_ctx.buf, exp_vrfy_out) == 0);

exit:
    mbedtls_x509_crt_free(&crt);
    mbedtls_x509_crt_free(&ca);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C:!MBEDTLS_X509_REMOVE_INFO */
void mbedtls_x509_dn_gets_subject_replace(char *crt_file,
                                          char *new_subject_ou,
                                          char *result_str,
                                          int ret)
{
    mbedtls_x509_crt   crt;
    char buf[2000];
    int res = 0;

    mbedtls_x509_crt_init(&crt);
    memset(buf, 0, 2000);

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);
    crt.subject.next->val.p = (unsigned char *) new_subject_ou;
    crt.subject.next->val.len = strlen(new_subject_ou);

    res =  mbedtls_x509_dn_gets(buf, 2000, &crt.subject);

    if (ret != 0) {
        TEST_ASSERT(res == ret);
    } else {
        TEST_ASSERT(res != -1);
        TEST_ASSERT(res != -2);
        TEST_ASSERT(strcmp(buf, result_str) == 0);
    }
exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C:!MBEDTLS_X509_REMOVE_INFO */
void mbedtls_x509_dn_gets(char *crt_file, char *entity, char *result_str)
{
    mbedtls_x509_crt   crt;
    char buf[2000];
    int res = 0;

    mbedtls_x509_crt_init(&crt);
    memset(buf, 0, 2000);

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);
    if (strcmp(entity, "subject") == 0) {
        res =  mbedtls_x509_dn_gets(buf, 2000, &crt.subject);
    } else if (strcmp(entity, "issuer") == 0) {
        res =  mbedtls_x509_dn_gets(buf, 2000, &crt.issuer);
    } else {
        TEST_ASSERT("Unknown entity" == 0);
    }

    TEST_ASSERT(res != -1);
    TEST_ASSERT(res != -2);

    TEST_ASSERT(strcmp(buf, result_str) == 0);

exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C */
void mbedtls_x509_get_name(char *rdn_sequence, int exp_ret)
{
    unsigned char *name;
    unsigned char *p;
    size_t name_len;
    mbedtls_x509_name head;
    int ret;

    memset(&head, 0, sizeof(head));

    name = mbedtls_test_unhexify_alloc(rdn_sequence, &name_len);
    p = name;

    ret = mbedtls_x509_get_name(&p, (name + name_len), &head);
    if (ret == 0) {
        mbedtls_asn1_free_named_data_list_shallow(head.next);
    }

    TEST_EQUAL(ret, exp_ret);

    mbedtls_free(name);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CREATE_C:MBEDTLS_X509_USE_C:MBEDTLS_X509_CRT_PARSE_C:!MBEDTLS_X509_REMOVE_INFO */
void mbedtls_x509_dn_get_next(char *name_str,
                              int next_merged,
                              char *expected_oids,
                              int exp_count,
                              char *exp_dn_gets)
{
    int ret = 0, i;
    size_t len = 0, out_size;
    mbedtls_asn1_named_data *names = NULL;
    mbedtls_x509_name parsed, *parsed_cur;
    // Size of buf is maximum required for test cases
    unsigned char buf[80], *out = NULL, *c;
    const char *short_name;

    memset(&parsed, 0, sizeof(parsed));
    memset(buf, 0, sizeof(buf));
    c = buf + sizeof(buf);
    // Additional size required for trailing space
    out_size = strlen(expected_oids) + 2;
    ASSERT_ALLOC(out, out_size);

    TEST_EQUAL(mbedtls_x509_string_to_names(&names, name_str), 0);

    ret = mbedtls_x509_write_names(&c, buf, names);
    TEST_LE_S(0, ret);

    TEST_EQUAL(mbedtls_asn1_get_tag(&c, buf + sizeof(buf), &len,
                                    MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE), 0);
    TEST_EQUAL(mbedtls_x509_get_name(&c, buf + sizeof(buf), &parsed), 0);

    // Iterate over names and set next_merged nodes
    parsed_cur = &parsed;
    for (; next_merged != 0 && parsed_cur != NULL; next_merged = next_merged >> 1) {
        parsed_cur->next_merged = next_merged & 0x01;
        parsed_cur = parsed_cur->next;
    }

    // Iterate over RDN nodes and print OID of first element to buffer
    parsed_cur = &parsed;
    len = 0;
    for (i = 0; parsed_cur != NULL; i++) {
        TEST_EQUAL(mbedtls_oid_get_attr_short_name(&parsed_cur->oid,
                                                   &short_name), 0);
        len += mbedtls_snprintf((char *) out + len, out_size - len, "%s ", short_name);
        parsed_cur = mbedtls_x509_dn_get_next(parsed_cur);
    }
    out[len-1] = 0;

    TEST_EQUAL(exp_count, i);
    TEST_EQUAL(strcmp((char *) out, expected_oids), 0);
    mbedtls_free(out);
    out = NULL;

    out_size = strlen(exp_dn_gets) + 1;
    ASSERT_ALLOC(out, out_size);

    TEST_LE_S(0, mbedtls_x509_dn_gets((char *) out, out_size, &parsed));
    TEST_EQUAL(strcmp((char *) out, exp_dn_gets), 0);
exit:
    mbedtls_free(out);
    mbedtls_asn1_free_named_data_list(&names);
    mbedtls_asn1_free_named_data_list_shallow(parsed.next);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
void mbedtls_x509_time_is_past(char *crt_file, char *entity, int result)
{
    mbedtls_x509_crt   crt;

    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);

    if (strcmp(entity, "valid_from") == 0) {
        TEST_ASSERT(mbedtls_x509_time_is_past(&crt.valid_from) == result);
    } else if (strcmp(entity, "valid_to") == 0) {
        TEST_ASSERT(mbedtls_x509_time_is_past(&crt.valid_to) == result);
    } else {
        TEST_ASSERT("Unknown entity" == 0);
    }

exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
void mbedtls_x509_time_is_future(char *crt_file, char *entity, int result)
{
    mbedtls_x509_crt   crt;

    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);

    if (strcmp(entity, "valid_from") == 0) {
        TEST_ASSERT(mbedtls_x509_time_is_future(&crt.valid_from) == result);
    } else if (strcmp(entity, "valid_to") == 0) {
        TEST_ASSERT(mbedtls_x509_time_is_future(&crt.valid_to) == result);
    } else {
        TEST_ASSERT("Unknown entity" == 0);
    }

exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C:MBEDTLS_FS_IO */
void x509parse_crt_file(char *crt_file, int result)
{
    mbedtls_x509_crt crt;

    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == result);

exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C */
void x509parse_crt(data_t *buf, char *result_str, int result)
{
    mbedtls_x509_crt   crt;
#if !defined(MBEDTLS_X509_REMOVE_INFO)
    unsigned char output[2000] = { 0 };
    int res;
#else
    ((void) result_str);
#endif

    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_der(&crt, buf->x, buf->len) == (result));
#if !defined(MBEDTLS_X509_REMOVE_INFO)
    if ((result) == 0) {
        res = mbedtls_x509_crt_info((char *) output, 2000, "", &crt);
        TEST_ASSERT(res != -1);
        TEST_ASSERT(res != -2);

        TEST_ASSERT(strcmp((char *) output, result_str) == 0);
    }
    memset(output, 0, 2000);
#endif

    mbedtls_x509_crt_free(&crt);
    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_der_nocopy(&crt, buf->x, buf->len) == (result));
#if !defined(MBEDTLS_X509_REMOVE_INFO)
    if ((result) == 0) {
        memset(output, 0, 2000);

        res = mbedtls_x509_crt_info((char *) output, 2000, "", &crt);

        TEST_ASSERT(res != -1);
        TEST_ASSERT(res != -2);

        TEST_ASSERT(strcmp((char *) output, result_str) == 0);
    }
    memset(output, 0, 2000);
#endif /* !MBEDTLS_X509_REMOVE_INFO */

    mbedtls_x509_crt_free(&crt);
    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_der_with_ext_cb(&crt, buf->x, buf->len, 0, NULL,
                                                       NULL) == (result));
#if !defined(MBEDTLS_X509_REMOVE_INFO)
    if ((result) == 0) {
        res = mbedtls_x509_crt_info((char *) output, 2000, "", &crt);

        TEST_ASSERT(res != -1);
        TEST_ASSERT(res != -2);

        TEST_ASSERT(strcmp((char *) output, result_str) == 0);
    }
    memset(output, 0, 2000);
#endif /* !MBEDTLS_X509_REMOVE_INFO */

    mbedtls_x509_crt_free(&crt);
    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_der_with_ext_cb(&crt, buf->x, buf->len, 1, NULL,
                                                       NULL) == (result));
#if !defined(MBEDTLS_X509_REMOVE_INFO)
    if ((result) == 0) {
        res = mbedtls_x509_crt_info((char *) output, 2000, "", &crt);

        TEST_ASSERT(res != -1);
        TEST_ASSERT(res != -2);

        TEST_ASSERT(strcmp((char *) output, result_str) == 0);
    }
#endif /* !MBEDTLS_X509_REMOVE_INFO */

exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C */
void x509parse_crt_cb(data_t *buf, char *result_str, int result)
{
    mbedtls_x509_crt   crt;
    mbedtls_x509_buf   oid;

#if !defined(MBEDTLS_X509_REMOVE_INFO)
    unsigned char output[2000] = { 0 };
    int res;
#else
    ((void) result_str);
#endif

    oid.tag = MBEDTLS_ASN1_OID;
    oid.len = MBEDTLS_OID_SIZE(MBEDTLS_OID_PKIX "\x01\x1F");
    oid.p = (unsigned char *) MBEDTLS_OID_PKIX "\x01\x1F";

    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_der_with_ext_cb(&crt, buf->x, buf->len, 0, parse_crt_ext_cb,
                                                       &oid) == (result));
#if !defined(MBEDTLS_X509_REMOVE_INFO)
    if ((result) == 0) {
        res = mbedtls_x509_crt_info((char *) output, 2000, "", &crt);

        TEST_ASSERT(res != -1);
        TEST_ASSERT(res != -2);

        TEST_ASSERT(strcmp((char *) output, result_str) == 0);
    }
    memset(output, 0, 2000);
#endif /* !MBEDTLS_X509_REMOVE_INFO */

    mbedtls_x509_crt_free(&crt);
    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_der_with_ext_cb(&crt, buf->x, buf->len, 1, parse_crt_ext_cb,
                                                       &oid) == (result));
#if !defined(MBEDTLS_X509_REMOVE_INFO)
    if ((result) == 0) {
        res = mbedtls_x509_crt_info((char *) output, 2000, "", &crt);

        TEST_ASSERT(res != -1);
        TEST_ASSERT(res != -2);

        TEST_ASSERT(strcmp((char *) output, result_str) == 0);
    }
#endif /* !MBEDTLS_X509_REMOVE_INFO */

exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CRL_PARSE_C:!MBEDTLS_X509_REMOVE_INFO */
void x509parse_crl(data_t *buf, char *result_str, int result)
{
    mbedtls_x509_crl   crl;
    unsigned char output[2000];
    int res;

    mbedtls_x509_crl_init(&crl);
    memset(output, 0, 2000);


    TEST_ASSERT(mbedtls_x509_crl_parse(&crl, buf->x, buf->len) == (result));
    if ((result) == 0) {
        res = mbedtls_x509_crl_info((char *) output, 2000, "", &crl);

        TEST_ASSERT(res != -1);
        TEST_ASSERT(res != -2);

        TEST_ASSERT(strcmp((char *) output, result_str) == 0);
    }

exit:
    mbedtls_x509_crl_free(&crl);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CSR_PARSE_C:!MBEDTLS_X509_REMOVE_INFO */
void mbedtls_x509_csr_parse(data_t *csr_der, char *ref_out, int ref_ret)
{
    mbedtls_x509_csr csr;
    char my_out[1000];
    int my_ret;

    mbedtls_x509_csr_init(&csr);
    memset(my_out, 0, sizeof(my_out));

    my_ret = mbedtls_x509_csr_parse_der(&csr, csr_der->x, csr_der->len);
    TEST_ASSERT(my_ret == ref_ret);

    if (ref_ret == 0) {
        size_t my_out_len = mbedtls_x509_csr_info(my_out, sizeof(my_out), "", &csr);
        TEST_ASSERT(my_out_len == strlen(ref_out));
        TEST_ASSERT(strcmp(my_out, ref_out) == 0);
    }

exit:
    mbedtls_x509_csr_free(&csr);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CSR_PARSE_C:!MBEDTLS_X509_REMOVE_INFO */
void mbedtls_x509_csr_parse_file(char *csr_file, char *ref_out, int ref_ret)
{
    mbedtls_x509_csr csr;
    char my_out[1000];
    int my_ret;

    mbedtls_x509_csr_init(&csr);
    memset(my_out, 0, sizeof(my_out));

    my_ret = mbedtls_x509_csr_parse_file(&csr, csr_file);
    TEST_ASSERT(my_ret == ref_ret);

    if (ref_ret == 0) {
        size_t my_out_len = mbedtls_x509_csr_info(my_out, sizeof(my_out), "", &csr);
        TEST_ASSERT(my_out_len == strlen(ref_out));
        TEST_ASSERT(strcmp(my_out, ref_out) == 0);
    }

exit:
    mbedtls_x509_csr_free(&csr);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
void mbedtls_x509_crt_parse_path(char *crt_path, int ret, int nb_crt)
{
    mbedtls_x509_crt chain, *cur;
    int i;

    mbedtls_x509_crt_init(&chain);

    TEST_ASSERT(mbedtls_x509_crt_parse_path(&chain, crt_path) == ret);

    /* Check how many certs we got */
    for (i = 0, cur = &chain; cur != NULL; cur = cur->next) {
        if (cur->raw.p != NULL) {
            i++;
        }
    }

    TEST_ASSERT(i == nb_crt);

exit:
    mbedtls_x509_crt_free(&chain);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
void mbedtls_x509_crt_verify_max(char *ca_file, char *chain_dir, int nb_int,
                                 int ret_chk, int flags_chk)
{
    char file_buf[128];
    int ret;
    uint32_t flags;
    mbedtls_x509_crt trusted, chain;

    /*
     * We expect chain_dir to contain certificates 00.crt, 01.crt, etc.
     * with NN.crt signed by NN-1.crt
     */

    mbedtls_x509_crt_init(&trusted);
    mbedtls_x509_crt_init(&chain);

    USE_PSA_INIT();

    /* Load trusted root */
    TEST_ASSERT(mbedtls_x509_crt_parse_file(&trusted, ca_file) == 0);

    /* Load a chain with nb_int intermediates (from 01 to nb_int),
     * plus one "end-entity" cert (nb_int + 1) */
    ret = mbedtls_snprintf(file_buf, sizeof(file_buf), "%s/c%02d.pem", chain_dir,
                           nb_int + 1);
    TEST_ASSERT(ret > 0 && (size_t) ret < sizeof(file_buf));
    TEST_ASSERT(mbedtls_x509_crt_parse_file(&chain, file_buf) == 0);

    /* Try to verify that chain */
    ret = mbedtls_x509_crt_verify(&chain, &trusted, NULL, NULL, &flags,
                                  NULL, NULL);
    TEST_ASSERT(ret == ret_chk);
    TEST_ASSERT(flags == (uint32_t) flags_chk);

exit:
    mbedtls_x509_crt_free(&chain);
    mbedtls_x509_crt_free(&trusted);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
void mbedtls_x509_crt_verify_chain(char *chain_paths, char *trusted_ca,
                                   int flags_result, int result,
                                   char *profile_name, int vrfy_fatal_lvls)
{
    char *act;
    uint32_t flags;
    int res;
    mbedtls_x509_crt trusted, chain;
    const mbedtls_x509_crt_profile *profile = NULL;

    mbedtls_x509_crt_init(&chain);
    mbedtls_x509_crt_init(&trusted);

    USE_PSA_INIT();

    while ((act = mystrsep(&chain_paths, " ")) != NULL) {
        TEST_ASSERT(mbedtls_x509_crt_parse_file(&chain, act) == 0);
    }
    TEST_ASSERT(mbedtls_x509_crt_parse_file(&trusted, trusted_ca) == 0);

    if (strcmp(profile_name, "") == 0) {
        profile = &mbedtls_x509_crt_profile_default;
    } else if (strcmp(profile_name, "next") == 0) {
        profile = &mbedtls_x509_crt_profile_next;
    } else if (strcmp(profile_name, "suiteb") == 0) {
        profile = &mbedtls_x509_crt_profile_suiteb;
    } else if (strcmp(profile_name, "rsa3072") == 0) {
        profile = &profile_rsa3072;
    } else if (strcmp(profile_name, "sha512") == 0) {
        profile = &profile_sha512;
    }

    res = mbedtls_x509_crt_verify_with_profile(&chain, &trusted, NULL, profile,
                                               NULL, &flags, verify_fatal, &vrfy_fatal_lvls);

    TEST_ASSERT(res == (result));
    TEST_ASSERT(flags == (uint32_t) (flags_result));

exit:
    mbedtls_x509_crt_free(&trusted);
    mbedtls_x509_crt_free(&chain);
    USE_PSA_DONE();
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_USE_C:!MBEDTLS_X509_REMOVE_INFO */
void x509_oid_desc(data_t *buf, char *ref_desc)
{
    mbedtls_x509_buf oid;
    const char *desc = NULL;
    int ret;


    oid.tag = MBEDTLS_ASN1_OID;
    oid.p   = buf->x;
    oid.len   = buf->len;

    ret = mbedtls_oid_get_extended_key_usage(&oid, &desc);

    if (strcmp(ref_desc, "notfound") == 0) {
        TEST_ASSERT(ret != 0);
        TEST_ASSERT(desc == NULL);
    } else {
        TEST_ASSERT(ret == 0);
        TEST_ASSERT(desc != NULL);
        TEST_ASSERT(strcmp(desc, ref_desc) == 0);
    }
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_USE_C */
void x509_oid_numstr(data_t *oid_buf, char *numstr, int blen, int ret)
{
    mbedtls_x509_buf oid;
    char num_buf[100];

    memset(num_buf, 0x2a, sizeof(num_buf));

    oid.tag = MBEDTLS_ASN1_OID;
    oid.p   = oid_buf->x;
    oid.len   = oid_buf->len;

    TEST_ASSERT((size_t) blen <= sizeof(num_buf));

    TEST_ASSERT(mbedtls_oid_get_numeric_string(num_buf, blen, &oid) == ret);

    if (ret >= 0) {
        TEST_ASSERT(num_buf[ret] == 0);
        TEST_ASSERT(strcmp(num_buf, numstr) == 0);
    }
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
void x509_check_key_usage(char *crt_file, int usage, int ret)
{
    mbedtls_x509_crt crt;

    mbedtls_x509_crt_init(&crt);

    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);

    TEST_ASSERT(mbedtls_x509_crt_check_key_usage(&crt, usage) == ret);

exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_FS_IO:MBEDTLS_X509_CRT_PARSE_C */
void x509_check_extended_key_usage(char *crt_file, data_t *oid, int ret
                                   )
{
    mbedtls_x509_crt crt;

    mbedtls_x509_crt_init(&crt);


    TEST_ASSERT(mbedtls_x509_crt_parse_file(&crt, crt_file) == 0);

    TEST_ASSERT(mbedtls_x509_crt_check_extended_key_usage(&crt, (const char *) oid->x,
                                                          oid->len) == ret);

exit:
    mbedtls_x509_crt_free(&crt);
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_USE_C */
void x509_get_time(int tag, char *time_str, int ret, int year, int mon,
                   int day, int hour, int min, int sec)
{
    mbedtls_x509_time time;
    unsigned char buf[21];
    unsigned char *start = buf;
    unsigned char *end = buf;

    memset(&time, 0x00, sizeof(time));
    *end = (unsigned char) tag; end++;
    *end = strlen(time_str);
    TEST_ASSERT(*end < 20);
    end++;
    memcpy(end, time_str, (size_t) *(end - 1));
    end += *(end - 1);

    TEST_ASSERT(mbedtls_x509_get_time(&start, end, &time) == ret);
    if (ret == 0) {
        TEST_ASSERT(year == time.year);
        TEST_ASSERT(mon  == time.mon);
        TEST_ASSERT(day  == time.day);
        TEST_ASSERT(hour == time.hour);
        TEST_ASSERT(min  == time.min);
        TEST_ASSERT(sec  == time.sec);
    }
}
/* END_CASE */

/* BEGIN_CASE depends_on:MBEDTLS_X509_CRT_PARSE_C:MBEDTLS_X509_RSASSA_PSS_SUPPORT */
void x509_parse_rsassa_pss_params(data_t *params, int params_tag,
                                  int ref_msg_md, int ref_mgf_md,
                                  int ref_salt_len, int ref_ret)
{
    int my_ret;
    mbedtls_x509_buf buf;
    mbedtls_md_type_t my_msg_md, my_mgf_md;
    int my_salt_len;

    buf.p = params->x;
    buf.len = params->len;
    buf.tag = params_tag;

    my_ret = mbedtls_x509_get_rsassa_pss_params(&buf, &my_msg_md, &my_mgf_md,
                                                &my_salt_len);

    TEST_ASSERT(my_ret == ref_ret);

    if (ref_ret == 0) {
        TEST_ASSERT(my_msg_md == (mbedtls_md_type_t) ref_msg_md);
        TEST_ASSERT(my_mgf_md == (mbedtls_md_type_t) ref_mgf_md);
        TEST_ASSERT(my_salt_len == ref_salt_len);
    }

exit:
    ;;
}
/* END_CASE */