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Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine
2023-01-11 14:50:10 +01:00
parent fd13a0f851
commit 449bd8303e
442 changed files with 86735 additions and 89438 deletions
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289
library/ssl_cookie.c
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@ -57,14 +57,14 @@
* 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)
{
#if defined(MBEDTLS_USE_PSA_CRYPTO)
ctx->psa_hmac_key = MBEDTLS_SVC_KEY_ID_INIT;
#else
mbedtls_md_init( &ctx->hmac_ctx );
mbedtls_md_init(&ctx->hmac_ctx);
#endif /* MBEDTLS_USE_PSA_CRYPTO */
#if !defined(MBEDTLS_HAVE_TIME)
ctx->serial = 0;
@ -73,80 +73,83 @@ void mbedtls_ssl_cookie_init( mbedtls_ssl_cookie_ctx *ctx )
#if !defined(MBEDTLS_USE_PSA_CRYPTO)
#if defined(MBEDTLS_THREADING_C)
mbedtls_mutex_init( &ctx->mutex );
mbedtls_mutex_init(&ctx->mutex);
#endif
#endif /* !MBEDTLS_USE_PSA_CRYPTO */
}
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)
{
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_destroy_key( ctx->psa_hmac_key );
psa_destroy_key(ctx->psa_hmac_key);
#else
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
#endif /* MBEDTLS_USE_PSA_CRYPTO */
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)
{
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_key_attributes_t attributes = PSA_KEY_ATTRIBUTES_INIT;
psa_status_t status = PSA_ERROR_CORRUPTION_DETECTED;
psa_algorithm_t alg;
(void)f_rng;
(void)p_rng;
(void) f_rng;
(void) p_rng;
alg = mbedtls_hash_info_psa_from_md( COOKIE_MD );
if( alg == 0 )
return( MBEDTLS_ERR_SSL_BAD_INPUT_DATA );
alg = mbedtls_hash_info_psa_from_md(COOKIE_MD);
if (alg == 0) {
return MBEDTLS_ERR_SSL_BAD_INPUT_DATA;
}
ctx->psa_hmac_alg = PSA_ALG_TRUNCATED_MAC( PSA_ALG_HMAC( alg ),
COOKIE_HMAC_LEN );
ctx->psa_hmac_alg = PSA_ALG_TRUNCATED_MAC(PSA_ALG_HMAC(alg),
COOKIE_HMAC_LEN);
psa_set_key_usage_flags( &attributes, PSA_KEY_USAGE_VERIFY_MESSAGE |
PSA_KEY_USAGE_SIGN_MESSAGE );
psa_set_key_algorithm( &attributes, ctx->psa_hmac_alg );
psa_set_key_type( &attributes, PSA_KEY_TYPE_HMAC );
psa_set_key_bits( &attributes, PSA_BYTES_TO_BITS( COOKIE_MD_OUTLEN ) );
psa_set_key_usage_flags(&attributes, PSA_KEY_USAGE_VERIFY_MESSAGE |
PSA_KEY_USAGE_SIGN_MESSAGE);
psa_set_key_algorithm(&attributes, ctx->psa_hmac_alg);
psa_set_key_type(&attributes, PSA_KEY_TYPE_HMAC);
psa_set_key_bits(&attributes, PSA_BYTES_TO_BITS(COOKIE_MD_OUTLEN));
if( ( status = psa_generate_key( &attributes,
&ctx->psa_hmac_key ) ) != PSA_SUCCESS )
{
return psa_ssl_status_to_mbedtls( status );
if ((status = psa_generate_key(&attributes,
&ctx->psa_hmac_key)) != PSA_SUCCESS) {
return psa_ssl_status_to_mbedtls(status);
}
#else
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));
#endif /* MBEDTLS_USE_PSA_CRYPTO */
return( 0 );
return 0;
}
#if !defined(MBEDTLS_USE_PSA_CRYPTO)
@ -154,36 +157,35 @@ int mbedtls_ssl_cookie_setup( mbedtls_ssl_cookie_ctx *ctx,
* 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;
}
#endif /* !MBEDTLS_USE_PSA_CRYPTO */
/*
* 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)
{
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
@ -194,13 +196,14 @@ int mbedtls_ssl_cookie_write( void *p_ctx,
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
@ -209,33 +212,29 @@ int mbedtls_ssl_cookie_write( void *p_ctx,
*p += 4;
#if defined(MBEDTLS_USE_PSA_CRYPTO)
status = psa_mac_sign_setup( &operation, ctx->psa_hmac_key,
ctx->psa_hmac_alg );
if( status != PSA_SUCCESS )
{
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_sign_setup(&operation, ctx->psa_hmac_key,
ctx->psa_hmac_alg);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
goto exit;
}
status = psa_mac_update( &operation, *p - 4, 4 );
if( status != PSA_SUCCESS )
{
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_update(&operation, *p - 4, 4);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
goto exit;
}
status = psa_mac_update( &operation, cli_id, cli_id_len );
if( status != PSA_SUCCESS )
{
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_update(&operation, cli_id, cli_id_len);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
goto exit;
}
status = psa_mac_sign_finish( &operation, *p, COOKIE_MD_OUTLEN,
&sign_mac_length );
if( status != PSA_SUCCESS )
{
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_sign_finish(&operation, *p, COOKIE_MD_OUTLEN,
&sign_mac_length);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
goto exit;
}
@ -244,35 +243,38 @@ int mbedtls_ssl_cookie_write( void *p_ctx,
ret = 0;
#else
#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
#endif /* MBEDTLS_USE_PSA_CRYPTO */
#if defined(MBEDTLS_USE_PSA_CRYPTO)
exit:
status = psa_mac_abort( &operation );
if( status != PSA_SUCCESS )
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_abort(&operation);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
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)
{
#if defined(MBEDTLS_USE_PSA_CRYPTO)
psa_mac_operation_t operation = PSA_MAC_OPERATION_INIT;
@ -285,99 +287,98 @@ 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_USE_PSA_CRYPTO)
status = psa_mac_verify_setup( &operation, ctx->psa_hmac_key,
ctx->psa_hmac_alg );
if( status != PSA_SUCCESS )
{
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_verify_setup(&operation, ctx->psa_hmac_key,
ctx->psa_hmac_alg);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
goto exit;
}
status = psa_mac_update( &operation, cookie, 4 );
if( status != PSA_SUCCESS )
{
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_update(&operation, cookie, 4);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
goto exit;
}
status = psa_mac_update( &operation, cli_id,
cli_id_len );
if( status != PSA_SUCCESS )
{
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_update(&operation, cli_id,
cli_id_len);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
goto exit;
}
status = psa_mac_verify_finish( &operation, cookie + 4,
COOKIE_HMAC_LEN );
if( status != PSA_SUCCESS )
{
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_verify_finish(&operation, cookie + 4,
COOKIE_HMAC_LEN);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
goto exit;
}
ret = 0;
#else
#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;
}
#endif /* MBEDTLS_USE_PSA_CRYPTO */
#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:
#if defined(MBEDTLS_USE_PSA_CRYPTO)
status = psa_mac_abort( &operation );
if( status != PSA_SUCCESS )
ret = psa_ssl_status_to_mbedtls( status );
status = psa_mac_abort(&operation);
if (status != PSA_SUCCESS) {
ret = psa_ssl_status_to_mbedtls(status);
}
#else
mbedtls_platform_zeroize( ref_hmac, sizeof( ref_hmac ) );
mbedtls_platform_zeroize(ref_hmac, sizeof(ref_hmac));
#endif /* MBEDTLS_USE_PSA_CRYPTO */
return( ret );
return ret;
}
#endif /* MBEDTLS_SSL_COOKIE_C */