mirror of
https://github.com/yuzu-emu/mbedtls.git
synced 2024-12-23 09:55:32 +00:00
Merge remote-tracking branch 'public/pr/2934' into baremetal
This commit is contained in:
commit
501c466d01
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@ -70,8 +70,8 @@
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/* \} name SECTION: Module settings */
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#define MBEDTLS_HMAC_DRBG_PR_OFF 0 /**< No prediction resistance */
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#define MBEDTLS_HMAC_DRBG_PR_ON 1 /**< Prediction resistance enabled */
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#define MBEDTLS_HMAC_DRBG_PR_OFF 0x55555555 /**< No prediction resistance */
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#define MBEDTLS_HMAC_DRBG_PR_ON 0x2AAAAAAA /**< Prediction resistance enabled */
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#ifdef __cplusplus
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extern "C" {
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@ -202,7 +202,8 @@ void mbedtls_hmac_drbg_set_reseed_interval( mbedtls_hmac_drbg_context *ctx,
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* \param add_len Length of additional data, or 0
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*
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* \return \c 0 on success, or an error from the underlying
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* hash calculation.
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* hash calculation or
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* MBEDTLS_ERR_PLATFORM_FAULT_DETECTED.
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*
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* \note Additional data is optional, pass NULL and 0 as second
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* third argument if no additional data is being used.
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@ -237,7 +238,8 @@ int mbedtls_hmac_drbg_reseed( mbedtls_hmac_drbg_context *ctx,
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* \return 0 if successful, or
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* MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED, or
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* MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG, or
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* MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG.
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* MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG, or
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* MBEDTLS_ERR_PLATFORM_FAULT_DETECTED.
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*/
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int mbedtls_hmac_drbg_random_with_add( void *p_rng,
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unsigned char *output, size_t output_len,
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@ -255,7 +257,9 @@ int mbedtls_hmac_drbg_random_with_add( void *p_rng,
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*
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* \return 0 if successful, or
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* MBEDTLS_ERR_HMAC_DRBG_ENTROPY_SOURCE_FAILED, or
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* MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG
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* MBEDTLS_ERR_HMAC_DRBG_REQUEST_TOO_BIG,
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* MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG, or
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* MBEDTLS_ERR_PLATFORM_FAULT_DETECTED.
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*/
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int mbedtls_hmac_drbg_random( void *p_rng, unsigned char *output, size_t out_len );
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@ -34,6 +34,7 @@
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#if defined(MBEDTLS_HMAC_DRBG_C)
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#include "mbedtls/hmac_drbg.h"
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#include "mbedtls/platform.h"
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#include "mbedtls/platform_util.h"
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#include <string.h>
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@ -51,6 +52,9 @@
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#endif /* MBEDTLS_SELF_TEST */
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#endif /* MBEDTLS_PLATFORM_C */
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#define HMAC_NONCE_YES 0x4AAAAAAA
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#define HMAC_NONCE_NO 0x75555555
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/*
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* HMAC_DRBG context initialization
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*/
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@ -74,42 +78,76 @@ int mbedtls_hmac_drbg_update_ret( mbedtls_hmac_drbg_context *ctx,
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mbedtls_md_get_handle( &ctx->md_ctx ) );
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unsigned char rounds = ( additional != NULL && add_len != 0 ) ? 2 : 1;
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unsigned char sep[1];
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volatile unsigned int flow_counter = 0;
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unsigned char K[MBEDTLS_MD_MAX_SIZE];
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int ret;
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int ret = MBEDTLS_ERR_PLATFORM_FAULT_DETECTED;
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for( sep[0] = 0; sep[0] < rounds; sep[0]++ )
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{
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/* Step 1 or 4 */
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flow_counter++;
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if( ( ret = mbedtls_md_hmac_reset( &ctx->md_ctx ) ) != 0 )
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goto exit;
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flow_counter++;
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if( ( ret = mbedtls_md_hmac_update( &ctx->md_ctx,
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ctx->V, md_len ) ) != 0 )
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goto exit;
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flow_counter++;
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if( ( ret = mbedtls_md_hmac_update( &ctx->md_ctx,
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sep, 1 ) ) != 0 )
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goto exit;
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if( rounds == 2 )
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{
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flow_counter++;
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if( ( ret = mbedtls_md_hmac_update( &ctx->md_ctx,
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additional, add_len ) ) != 0 )
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goto exit;
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}
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flow_counter++;
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if( ( ret = mbedtls_md_hmac_finish( &ctx->md_ctx, K ) ) != 0 )
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goto exit;
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/* Step 2 or 5 */
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flow_counter++;
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if( ( ret = mbedtls_md_hmac_starts( &ctx->md_ctx, K, md_len ) ) != 0 )
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goto exit;
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flow_counter++;
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if( ( ret = mbedtls_md_hmac_update( &ctx->md_ctx,
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ctx->V, md_len ) ) != 0 )
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goto exit;
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flow_counter++;
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if( ( ret = mbedtls_md_hmac_finish( &ctx->md_ctx, ctx->V ) ) != 0 )
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goto exit;
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flow_counter++;
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}
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exit:
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mbedtls_platform_zeroize( K, sizeof( K ) );
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return( ret );
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/* Check for possible attack.
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* Counters needs to have correct values when returning success
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*/
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if ( ret != 0 )
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return( ret ); // error case, return immediately
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if ( ( ( flow_counter == 8 ) && ( sep[0] == 1 ) ) ||
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( ( flow_counter == 18 ) && ( sep[0] == 2 ) ) )
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{
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flow_counter = flow_counter - sep[0];
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// Double check flow_counter
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if ( ( flow_counter == 7 ) || ( flow_counter == 16 ) )
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{
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return ret; // success, return 0 from ret
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}
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}
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return( MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
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}
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#if !defined(MBEDTLS_DEPRECATED_REMOVED)
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* Simplified HMAC_DRBG initialisation (for use with deterministic ECDSA)
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*/
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int mbedtls_hmac_drbg_seed_buf( mbedtls_hmac_drbg_context *ctx,
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mbedtls_md_handle_t md_info,
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const unsigned char *data, size_t data_len )
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mbedtls_md_handle_t md_info,
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const unsigned char *data, size_t data_len )
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{
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int ret;
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int ret = MBEDTLS_ERR_PLATFORM_FAULT_DETECTED;
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if( ( ret = mbedtls_md_setup( &ctx->md_ctx, md_info, 1 ) ) != 0 )
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return( ret );
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@ -146,7 +184,7 @@ int mbedtls_hmac_drbg_seed_buf( mbedtls_hmac_drbg_context *ctx,
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if( ( ret = mbedtls_hmac_drbg_update_ret( ctx, data, data_len ) ) != 0 )
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return( ret );
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return( 0 );
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return( ret );
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}
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/*
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@ -160,22 +198,19 @@ static int hmac_drbg_reseed_core( mbedtls_hmac_drbg_context *ctx,
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{
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unsigned char seed[MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT];
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size_t seedlen = 0;
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size_t total_entropy_len;
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int ret;
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if( use_nonce == HMAC_NONCE_NO )
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total_entropy_len = ctx->entropy_len;
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else
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total_entropy_len = ctx->entropy_len * 3 / 2;
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/* III. Check input length */
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if( len > MBEDTLS_HMAC_DRBG_MAX_INPUT ||
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total_entropy_len + len > MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT )
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{
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size_t total_entropy_len;
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if( use_nonce == 0 )
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total_entropy_len = ctx->entropy_len;
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else
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total_entropy_len = ctx->entropy_len * 3 / 2;
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/* III. Check input length */
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if( len > MBEDTLS_HMAC_DRBG_MAX_INPUT ||
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total_entropy_len + len > MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT )
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{
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return( MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG );
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}
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return( MBEDTLS_ERR_HMAC_DRBG_INPUT_TOO_BIG );
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}
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memset( seed, 0, MBEDTLS_HMAC_DRBG_MAX_SEED_INPUT );
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/* For initial seeding, allow adding of nonce generated
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* from the entropy source. See Sect 8.6.7 in SP800-90A. */
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if( use_nonce )
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if( use_nonce == HMAC_NONCE_YES )
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{
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/* Note: We don't merge the two calls to f_entropy() in order
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* to avoid requesting too much entropy from f_entropy()
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ctx->reseed_counter = 1;
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exit:
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/* 4. Done */
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mbedtls_platform_zeroize( seed, seedlen );
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return( ret );
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if ( ret != 0 )
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return ret;
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if ( ret == 0 && ctx->reseed_counter == 1 )
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{
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/* All ok, return 0 from ret */
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return ret;
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}
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return( MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
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}
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/*
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int mbedtls_hmac_drbg_reseed( mbedtls_hmac_drbg_context *ctx,
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const unsigned char *additional, size_t len )
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{
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return( hmac_drbg_reseed_core( ctx, additional, len,
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0 /* no nonce */ ) );
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return( hmac_drbg_reseed_core( ctx, additional, len, HMAC_NONCE_NO ) );
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}
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/*
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@ -286,13 +331,12 @@ int mbedtls_hmac_drbg_seed( mbedtls_hmac_drbg_context *ctx,
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md_size <= 28 ? 24 : /* 224-bits hash -> 192 bits */
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32; /* better (256+) -> 256 bits */
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if( ( ret = hmac_drbg_reseed_core( ctx, custom, len,
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1 /* add nonce */ ) ) != 0 )
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if( ( ret = hmac_drbg_reseed_core( ctx, custom, len, HMAC_NONCE_YES ) ) != 0 )
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{
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return( ret );
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}
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return( 0 );
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return( ret );
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}
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/*
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const unsigned char *additional, size_t add_len )
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{
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int ret;
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volatile unsigned char *output_fi = output;
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volatile size_t out_len_fi = out_len;
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mbedtls_hmac_drbg_context *ctx = (mbedtls_hmac_drbg_context *) p_rng;
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size_t md_len = mbedtls_md_get_size(
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mbedtls_md_get_handle( &ctx->md_ctx ) );
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@ -390,7 +436,21 @@ int mbedtls_hmac_drbg_random_with_add( void *p_rng,
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exit:
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/* 8. Done */
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return( ret );
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if ( ret != 0 )
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return ret;
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/*
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* Check doubled variables and illegal conditions in case of possible
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* attack.
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*/
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if ( ( out_len_fi == out_len ) && ( output_fi == output) &&
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( left == 0 ) )
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{
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return ret; // Success, return 0
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}
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return( MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
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}
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/*
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18
library/md.c
18
library/md.c
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@ -32,6 +32,7 @@
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#if defined(MBEDTLS_MD_C)
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#include "mbedtls/md.h"
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#include "mbedtls/platform.h"
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#include "mbedtls/platform_util.h"
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#if defined(MBEDTLS_PLATFORM_C)
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@ -525,7 +526,7 @@ int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
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int ret;
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unsigned char sum[MBEDTLS_MD_MAX_SIZE];
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unsigned char *ipad, *opad;
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size_t i;
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size_t i = 0;
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mbedtls_md_handle_t md_info;
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@ -575,16 +576,27 @@ int mbedtls_md_hmac_starts( mbedtls_md_context_t *ctx, const unsigned char *key,
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if( ( ret = mbedtls_md_info_starts( md_info, ctx->md_ctx ) ) != 0 )
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goto cleanup;
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i++; // Use i as flow control
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if( ( ret = mbedtls_md_info_update( md_info, ctx->md_ctx, ipad,
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mbedtls_md_info_block_size( md_info ) ) ) != 0 )
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{
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goto cleanup;
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}
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i++; // Use i as flow control now
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cleanup:
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mbedtls_platform_zeroize( sum, sizeof( sum ) );
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return( ret );
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if ( ret != 0 )
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return ret;
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/* Check possible fault injection */
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if ( ( i - 2 ) == keylen )
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return ret; // success, return 0 from ret
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return( MBEDTLS_ERR_PLATFORM_FAULT_DETECTED );
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}
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int mbedtls_md_hmac_update( mbedtls_md_context_t *ctx,
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@ -653,7 +665,7 @@ int mbedtls_md_hmac_finish( mbedtls_md_context_t *ctx, unsigned char *output )
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if( ( ret = mbedtls_md_info_finish( md_info, ctx->md_ctx, output ) ) != 0 )
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return( ret );
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return( 0 );
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return( ret );
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}
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int mbedtls_md_hmac_reset( mbedtls_md_context_t *ctx )
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