godot/thirdparty/mbedtls/library/asn1parse.c

/*
 *  Generic ASN.1 parsing
 *
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 */

#include "common.h"

#if defined(MBEDTLS_ASN1_PARSE_C) || defined(MBEDTLS_X509_CREATE_C) || \
    defined(MBEDTLS_PSA_UTIL_HAVE_ECDSA)

#include "mbedtls/asn1.h"
#include "mbedtls/platform_util.h"
#include "mbedtls/error.h"

#include <string.h>

#if defined(MBEDTLS_BIGNUM_C)
#include "mbedtls/bignum.h"
#endif

#include "mbedtls/platform.h"

/*
 * ASN.1 DER decoding routines
 */
int mbedtls_asn1_get_len(unsigned char **p,
                         const unsigned char *end,
                         size_t *len)
{ … }

int mbedtls_asn1_get_tag(unsigned char **p,
                         const unsigned char *end,
                         size_t *len, int tag)
{ … }
#endif /* MBEDTLS_ASN1_PARSE_C || MBEDTLS_X509_CREATE_C || MBEDTLS_PSA_UTIL_HAVE_ECDSA */

#if defined(MBEDTLS_ASN1_PARSE_C)
int mbedtls_asn1_get_bool(unsigned char **p,
                          const unsigned char *end,
                          int *val)
{ … }

static int asn1_get_tagged_int(unsigned char **p,
                               const unsigned char *end,
                               int tag, int *val)
{ … }

int mbedtls_asn1_get_int(unsigned char **p,
                         const unsigned char *end,
                         int *val)
{ … }

int mbedtls_asn1_get_enum(unsigned char **p,
                          const unsigned char *end,
                          int *val)
{ … }

#if defined(MBEDTLS_BIGNUM_C)
int mbedtls_asn1_get_mpi(unsigned char **p,
                         const unsigned char *end,
                         mbedtls_mpi *X)
{ … }
#endif /* MBEDTLS_BIGNUM_C */

int mbedtls_asn1_get_bitstring(unsigned char **p, const unsigned char *end,
                               mbedtls_asn1_bitstring *bs)
{ … }

/*
 * Traverse an ASN.1 "SEQUENCE OF <tag>"
 * and call a callback for each entry found.
 */
int mbedtls_asn1_traverse_sequence_of(
    unsigned char **p,
    const unsigned char *end,
    unsigned char tag_must_mask, unsigned char tag_must_val,
    unsigned char tag_may_mask, unsigned char tag_may_val,
    int (*cb)(void *ctx, int tag,
              unsigned char *start, size_t len),
    void *ctx)
{ … }

/*
 * Get a bit string without unused bits
 */
int mbedtls_asn1_get_bitstring_null(unsigned char **p, const unsigned char *end,
                                    size_t *len)
{ … }

void mbedtls_asn1_sequence_free(mbedtls_asn1_sequence *seq)
{ … }

asn1_get_sequence_of_cb_ctx_t;

static int asn1_get_sequence_of_cb(void *ctx,
                                   int tag,
                                   unsigned char *start,
                                   size_t len)
{ … }

/*
 *  Parses and splits an ASN.1 "SEQUENCE OF <tag>"
 */
int mbedtls_asn1_get_sequence_of(unsigned char **p,
                                 const unsigned char *end,
                                 mbedtls_asn1_sequence *cur,
                                 int tag)
{ … }

int mbedtls_asn1_get_alg(unsigned char **p,
                         const unsigned char *end,
                         mbedtls_asn1_buf *alg, mbedtls_asn1_buf *params)
{ … }

int mbedtls_asn1_get_alg_null(unsigned char **p,
                              const unsigned char *end,
                              mbedtls_asn1_buf *alg)
{ … }

#if !defined(MBEDTLS_DEPRECATED_REMOVED)
void mbedtls_asn1_free_named_data(mbedtls_asn1_named_data *cur)
{
    if (cur == NULL) {
        return;
    }

    mbedtls_free(cur->oid.p);
    mbedtls_free(cur->val.p);

    mbedtls_platform_zeroize(cur, sizeof(mbedtls_asn1_named_data));
}
#endif /* MBEDTLS_DEPRECATED_REMOVED */

void mbedtls_asn1_free_named_data_list(mbedtls_asn1_named_data **head)
{ … }

void mbedtls_asn1_free_named_data_list_shallow(mbedtls_asn1_named_data *name)
{ … }

const mbedtls_asn1_named_data *mbedtls_asn1_find_named_data(const mbedtls_asn1_named_data *list,
                                                            const char *oid, size_t len)
{ … }

#endif /* MBEDTLS_ASN1_PARSE_C */