godot/thirdparty/mbedtls/library/debug.c

/*
 *  Debugging routines
 *
 *  Copyright The Mbed TLS Contributors
 *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
 */

#include "common.h"

#if defined(MBEDTLS_DEBUG_C)

#include "mbedtls/platform.h"

#include "debug_internal.h"
#include "mbedtls/error.h"

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

/* DEBUG_BUF_SIZE must be at least 2 */
#define DEBUG_BUF_SIZE …

static int debug_threshold = …;

void mbedtls_debug_set_threshold(int threshold)
{ … }

/*
 * All calls to f_dbg must be made via this function
 */
static inline void debug_send_line(const mbedtls_ssl_context *ssl, int level,
                                   const char *file, int line,
                                   const char *str)
{ … }

MBEDTLS_PRINTF_ATTRIBUTE(5, 6)
void mbedtls_debug_print_msg(const mbedtls_ssl_context *ssl, int level,
                             const char *file, int line,
                             const char *format, ...)
{ … }

void mbedtls_debug_print_ret(const mbedtls_ssl_context *ssl, int level,
                             const char *file, int line,
                             const char *text, int ret)
{ … }

void mbedtls_debug_print_buf(const mbedtls_ssl_context *ssl, int level,
                             const char *file, int line, const char *text,
                             const unsigned char *buf, size_t len)
{ … }

#if defined(MBEDTLS_ECP_LIGHT)
void mbedtls_debug_print_ecp(const mbedtls_ssl_context *ssl, int level,
                             const char *file, int line,
                             const char *text, const mbedtls_ecp_point *X)
{ … }
#endif /* MBEDTLS_ECP_LIGHT */

#if defined(MBEDTLS_PK_USE_PSA_EC_DATA)
static void mbedtls_debug_print_ec_coord(const mbedtls_ssl_context *ssl, int level,
                                         const char *file, int line, const char *text,
                                         const unsigned char *buf, size_t len)
{
    char str[DEBUG_BUF_SIZE];
    size_t i, idx = 0;

    mbedtls_snprintf(str + idx, sizeof(str) - idx, "value of '%s' (%u bits) is:\n",
                     text, (unsigned int) len * 8);

    debug_send_line(ssl, level, file, line, str);

    for (i = 0; i < len; i++) {
        if (i >= 4096) {
            break;
        }

        if (i % 16 == 0) {
            if (i > 0) {
                mbedtls_snprintf(str + idx, sizeof(str) - idx, "\n");
                debug_send_line(ssl, level, file, line, str);

                idx = 0;
            }
        }

        idx += mbedtls_snprintf(str + idx, sizeof(str) - idx, " %02x",
                                (unsigned int) buf[i]);
    }

    if (len > 0) {
        for (/* i = i */; i % 16 != 0; i++) {
            idx += mbedtls_snprintf(str + idx, sizeof(str) - idx, "   ");
        }

        mbedtls_snprintf(str + idx, sizeof(str) - idx, "\n");
        debug_send_line(ssl, level, file, line, str);
    }
}

void mbedtls_debug_print_psa_ec(const mbedtls_ssl_context *ssl, int level,
                                const char *file, int line,
                                const char *text, const mbedtls_pk_context *pk)
{
    char str[DEBUG_BUF_SIZE];
    const uint8_t *coord_start;
    size_t coord_len;

    if (NULL == ssl              ||
        NULL == ssl->conf        ||
        NULL == ssl->conf->f_dbg ||
        level > debug_threshold) {
        return;
    }

    /* For the description of pk->pk_raw content please refer to the description
     * psa_export_public_key() function. */
    coord_len = (pk->pub_raw_len - 1)/2;

    /* X coordinate */
    coord_start = pk->pub_raw + 1;
    mbedtls_snprintf(str, sizeof(str), "%s(X)", text);
    mbedtls_debug_print_ec_coord(ssl, level, file, line, str, coord_start, coord_len);

    /* Y coordinate */
    coord_start = coord_start + coord_len;
    mbedtls_snprintf(str, sizeof(str), "%s(Y)", text);
    mbedtls_debug_print_ec_coord(ssl, level, file, line, str, coord_start, coord_len);
}
#endif /* MBEDTLS_PK_USE_PSA_EC_DATA */

#if defined(MBEDTLS_BIGNUM_C)
void mbedtls_debug_print_mpi(const mbedtls_ssl_context *ssl, int level,
                             const char *file, int line,
                             const char *text, const mbedtls_mpi *X)
{ … }
#endif /* MBEDTLS_BIGNUM_C */

#if defined(MBEDTLS_X509_CRT_PARSE_C) && !defined(MBEDTLS_X509_REMOVE_INFO)
static void debug_print_pk(const mbedtls_ssl_context *ssl, int level,
                           const char *file, int line,
                           const char *text, const mbedtls_pk_context *pk)
{ … }

static void debug_print_line_by_line(const mbedtls_ssl_context *ssl, int level,
                                     const char *file, int line, const char *text)
{ … }

void mbedtls_debug_print_crt(const mbedtls_ssl_context *ssl, int level,
                             const char *file, int line,
                             const char *text, const mbedtls_x509_crt *crt)
{ … }
#endif /* MBEDTLS_X509_CRT_PARSE_C && MBEDTLS_X509_REMOVE_INFO */

#if defined(MBEDTLS_KEY_EXCHANGE_SOME_ECDH_OR_ECDHE_ANY_ENABLED) && \
    defined(MBEDTLS_ECDH_C)
static void mbedtls_debug_printf_ecdh_internal(const mbedtls_ssl_context *ssl,
                                               int level, const char *file,
                                               int line,
                                               const mbedtls_ecdh_context *ecdh,
                                               mbedtls_debug_ecdh_attr attr)
{ … }

void mbedtls_debug_printf_ecdh(const mbedtls_ssl_context *ssl, int level,
                               const char *file, int line,
                               const mbedtls_ecdh_context *ecdh,
                               mbedtls_debug_ecdh_attr attr)
{ … }
#endif /* MBEDTLS_KEY_EXCHANGE_SOME_ECDH_OR_ECDHE_ANY_ENABLED &&
          MBEDTLS_ECDH_C */

#endif /* MBEDTLS_DEBUG_C */