lib/mbedtls
1
0
Fork 0
mirror of https://github.com/Mbed-TLS/mbedtls.git synced 2025-07-29 11:41:15 +03:00
Code Activity

Switch to the new code style

Browse Source 
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2023-01-11 14:52:35 +01:00
parent 480f683d15
commit 1b6c09a62e
391 changed files with 73134 additions and 75084 deletions
Download Patch File Download Diff File Expand all files Collapse all files

175
library/ssl_cookie.c
View File

@ -60,105 +60,108 @@
* Cookies are formed of a 4-bytes timestamp (or serial number) and
* an HMAC of timestamp and client ID.
*/
#define COOKIE_LEN ( 4 + COOKIE_HMAC_LEN )
#define COOKIE_LEN (4 + COOKIE_HMAC_LEN)
void mbedtls_ssl_cookie_init( mbedtls_ssl_cookie_ctx *ctx )
void mbedtls_ssl_cookie_init(mbedtls_ssl_cookie_ctx *ctx)
{
mbedtls_md_init( &ctx->hmac_ctx );
mbedtls_md_init(&ctx->hmac_ctx);
#if !defined(MBEDTLS_HAVE_TIME)
ctx->serial = 0;
#endif
ctx->timeout = MBEDTLS_SSL_COOKIE_TIMEOUT;
#if defined(MBEDTLS_THREADING_C)
mbedtls_mutex_init( &ctx->mutex );
mbedtls_mutex_init(&ctx->mutex);
#endif
}
void mbedtls_ssl_cookie_set_timeout( mbedtls_ssl_cookie_ctx *ctx, unsigned long delay )
void mbedtls_ssl_cookie_set_timeout(mbedtls_ssl_cookie_ctx *ctx, unsigned long delay)
{
ctx->timeout = delay;
}
void mbedtls_ssl_cookie_free( mbedtls_ssl_cookie_ctx *ctx )
void mbedtls_ssl_cookie_free(mbedtls_ssl_cookie_ctx *ctx)
{
mbedtls_md_free( &ctx->hmac_ctx );
mbedtls_md_free(&ctx->hmac_ctx);
#if defined(MBEDTLS_THREADING_C)
mbedtls_mutex_free( &ctx->mutex );
mbedtls_mutex_free(&ctx->mutex);
#endif
mbedtls_platform_zeroize( ctx, sizeof( mbedtls_ssl_cookie_ctx ) );
mbedtls_platform_zeroize(ctx, sizeof(mbedtls_ssl_cookie_ctx));
}
int mbedtls_ssl_cookie_setup( mbedtls_ssl_cookie_ctx *ctx,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng )
int mbedtls_ssl_cookie_setup(mbedtls_ssl_cookie_ctx *ctx,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
unsigned char key[COOKIE_MD_OUTLEN];
if( ( ret = f_rng( p_rng, key, sizeof( key ) ) ) != 0 )
return( ret );
if ((ret = f_rng(p_rng, key, sizeof(key))) != 0) {
return ret;
}
ret = mbedtls_md_setup( &ctx->hmac_ctx, mbedtls_md_info_from_type( COOKIE_MD ), 1 );
if( ret != 0 )
return( ret );
ret = mbedtls_md_setup(&ctx->hmac_ctx, mbedtls_md_info_from_type(COOKIE_MD), 1);
if (ret != 0) {
return ret;
}
ret = mbedtls_md_hmac_starts( &ctx->hmac_ctx, key, sizeof( key ) );
if( ret != 0 )
return( ret );
ret = mbedtls_md_hmac_starts(&ctx->hmac_ctx, key, sizeof(key));
if (ret != 0) {
return ret;
}
mbedtls_platform_zeroize( key, sizeof( key ) );
mbedtls_platform_zeroize(key, sizeof(key));
return( 0 );
return 0;
}
/*
* Generate the HMAC part of a cookie
*/
MBEDTLS_CHECK_RETURN_CRITICAL
static int ssl_cookie_hmac( mbedtls_md_context_t *hmac_ctx,
const unsigned char time[4],
unsigned char **p, unsigned char *end,
const unsigned char *cli_id, size_t cli_id_len )
static int ssl_cookie_hmac(mbedtls_md_context_t *hmac_ctx,
const unsigned char time[4],
unsigned char **p, unsigned char *end,
const unsigned char *cli_id, size_t cli_id_len)
{
unsigned char hmac_out[COOKIE_MD_OUTLEN];
MBEDTLS_SSL_CHK_BUF_PTR( *p, end, COOKIE_HMAC_LEN );
MBEDTLS_SSL_CHK_BUF_PTR(*p, end, COOKIE_HMAC_LEN);
if( mbedtls_md_hmac_reset( hmac_ctx ) != 0 ||
mbedtls_md_hmac_update( hmac_ctx, time, 4 ) != 0 ||
mbedtls_md_hmac_update( hmac_ctx, cli_id, cli_id_len ) != 0 ||
mbedtls_md_hmac_finish( hmac_ctx, hmac_out ) != 0 )
{
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
if (mbedtls_md_hmac_reset(hmac_ctx) != 0 ||
mbedtls_md_hmac_update(hmac_ctx, time, 4) != 0 ||
mbedtls_md_hmac_update(hmac_ctx, cli_id, cli_id_len) != 0 ||
mbedtls_md_hmac_finish(hmac_ctx, hmac_out) != 0) {
return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
}
memcpy( *p, hmac_out, COOKIE_HMAC_LEN );
memcpy(*p, hmac_out, COOKIE_HMAC_LEN);
*p += COOKIE_HMAC_LEN;
return( 0 );
return 0;
}
/*
* Generate cookie for DTLS ClientHello verification
*/
int mbedtls_ssl_cookie_write( void *p_ctx,
unsigned char **p, unsigned char *end,
const unsigned char *cli_id, size_t cli_id_len )
int mbedtls_ssl_cookie_write(void *p_ctx,
unsigned char **p, unsigned char *end,
const unsigned char *cli_id, size_t cli_id_len)
{
int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
mbedtls_ssl_cookie_ctx *ctx = (mbedtls_ssl_cookie_ctx *) p_ctx;
unsigned long t;
if( ctx == NULL || cli_id == NULL )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
if (ctx == NULL || cli_id == NULL) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
MBEDTLS_SSL_CHK_BUF_PTR( *p, end, COOKIE_LEN );
MBEDTLS_SSL_CHK_BUF_PTR(*p, end, COOKIE_LEN);
#if defined(MBEDTLS_HAVE_TIME)
t = (unsigned long) mbedtls_time( NULL );
t = (unsigned long) mbedtls_time(NULL);
#else
t = ctx->serial++;
#endif
@ -167,28 +170,30 @@ int mbedtls_ssl_cookie_write( void *p_ctx,
*p += 4;
#if defined(MBEDTLS_THREADING_C)
if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret ) );
if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) {
return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret);
}
#endif
ret = ssl_cookie_hmac( &ctx->hmac_ctx, *p - 4,
p, end, cli_id, cli_id_len );
ret = ssl_cookie_hmac(&ctx->hmac_ctx, *p - 4,
p, end, cli_id, cli_id_len);
#if defined(MBEDTLS_THREADING_C)
if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR,
MBEDTLS_ERR_THREADING_MUTEX_ERROR ) );
if (mbedtls_mutex_unlock(&ctx->mutex) != 0) {
return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_SSL_INTERNAL_ERROR,
MBEDTLS_ERR_THREADING_MUTEX_ERROR);
}
#endif
return( ret );
return ret;
}
/*
* Check a cookie
*/
int mbedtls_ssl_cookie_check( void *p_ctx,
const unsigned char *cookie, size_t cookie_len,
const unsigned char *cli_id, size_t cli_id_len )
int mbedtls_ssl_cookie_check(void *p_ctx,
const unsigned char *cookie, size_t cookie_len,
const unsigned char *cli_id, size_t cli_id_len)
{
unsigned char ref_hmac[COOKIE_HMAC_LEN];
int ret = 0;
@ -196,58 +201,60 @@ int mbedtls_ssl_cookie_check( void *p_ctx,
mbedtls_ssl_cookie_ctx *ctx = (mbedtls_ssl_cookie_ctx *) p_ctx;
unsigned long cur_time, cookie_time;
if( ctx == NULL || cli_id == NULL )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
if (ctx == NULL || cli_id == NULL) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
if( cookie_len != COOKIE_LEN )
return( -1 );
if (cookie_len != COOKIE_LEN) {
return -1;
}
#if defined(MBEDTLS_THREADING_C)
if( ( ret = mbedtls_mutex_lock( &ctx->mutex ) ) != 0 )
return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret ) );
#endif
if( ssl_cookie_hmac( &ctx->hmac_ctx, cookie,
&p, p + sizeof( ref_hmac ),
cli_id, cli_id_len ) != 0 )
ret = -1;
#if defined(MBEDTLS_THREADING_C)
if( mbedtls_mutex_unlock( &ctx->mutex ) != 0 )
{
ret = MBEDTLS_ERROR_ADD( MBEDTLS_ERR_SSL_INTERNAL_ERROR,
MBEDTLS_ERR_THREADING_MUTEX_ERROR );
if ((ret = mbedtls_mutex_lock(&ctx->mutex)) != 0) {
return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_SSL_INTERNAL_ERROR, ret);
}
#endif
if( ret != 0 )
goto exit;
if (ssl_cookie_hmac(&ctx->hmac_ctx, cookie,
&p, p + sizeof(ref_hmac),
cli_id, cli_id_len) != 0) {
ret = -1;
}
if( mbedtls_ct_memcmp( cookie + 4, ref_hmac, sizeof( ref_hmac ) ) != 0 )
{
#if defined(MBEDTLS_THREADING_C)
if (mbedtls_mutex_unlock(&ctx->mutex) != 0) {
ret = MBEDTLS_ERROR_ADD(MBEDTLS_ERR_SSL_INTERNAL_ERROR,
MBEDTLS_ERR_THREADING_MUTEX_ERROR);
}
#endif
if (ret != 0) {
goto exit;
}
if (mbedtls_ct_memcmp(cookie + 4, ref_hmac, sizeof(ref_hmac)) != 0) {
ret = -1;
goto exit;
}
#if defined(MBEDTLS_HAVE_TIME)
cur_time = (unsigned long) mbedtls_time( NULL );
cur_time = (unsigned long) mbedtls_time(NULL);
#else
cur_time = ctx->serial;
#endif
cookie_time = ( (unsigned long) cookie[0] << 24 ) |
( (unsigned long) cookie[1] << 16 ) |
( (unsigned long) cookie[2] << 8 ) |
( (unsigned long) cookie[3] );
cookie_time = ((unsigned long) cookie[0] << 24) |
((unsigned long) cookie[1] << 16) |
((unsigned long) cookie[2] << 8) |
((unsigned long) cookie[3]);
if( ctx->timeout != 0 && cur_time - cookie_time > ctx->timeout )
{
if (ctx->timeout != 0 && cur_time - cookie_time > ctx->timeout) {
ret = -1;
goto exit;
}
exit:
mbedtls_platform_zeroize( ref_hmac, sizeof( ref_hmac ) );
return( ret );
mbedtls_platform_zeroize(ref_hmac, sizeof(ref_hmac));
return ret;
}
#endif /* MBEDTLS_SSL_COOKIE_C */