yuzu-emu/mbedtls
1
0
Fork 0
mirror of https://github.com/yuzu-emu/mbedtls.git synced 2024-11-26 09:55:46 +01:00
Code Issues Packages Projects Releases Wiki Activity

CTR_DRBG: clean stack buffers

Browse Source 
Wipe stack buffers that may contain sensitive data (data that
contributes to the DRBG state.
This commit is contained in:
Gilles Peskine 2018-09-11 15:34:17 +02:00
parent 96e0d8ebfc
commit 17b2ac2a7c
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
library/ctr_drbg.c
View File

@ -264,6 +264,7 @@ static int ctr_drbg_update_internal( mbedtls_ctr_drbg_context *ctx,
mbedtls_aes_setkey_enc( &ctx->aes_ctx, tmp, MBEDTLS_CTR_DRBG_KEYBITS );
memcpy( ctx->counter, tmp + MBEDTLS_CTR_DRBG_KEYSIZE, MBEDTLS_CTR_DRBG_BLOCKSIZE );
mbedtls_zeroize( tmp, sizeof( tmp ) );
return( 0 );
}
@ -281,6 +282,7 @@ void mbedtls_ctr_drbg_update( mbedtls_ctr_drbg_context *ctx,
block_cipher_df( add_input, additional, add_len );
ctr_drbg_update_internal( ctx, add_input );
mbedtls_zeroize( add_input, sizeof( add_input ) );
}
}
@ -327,6 +329,7 @@ int mbedtls_ctr_drbg_reseed( mbedtls_ctr_drbg_context *ctx,
ctr_drbg_update_internal( ctx, seed );
ctx->reseed_counter = 1;
mbedtls_zeroize( seed, sizeof( seed ) );
return( 0 );
}
@ -393,6 +396,8 @@ int mbedtls_ctr_drbg_random_with_add( void *p_rng,
ctx->reseed_counter++;
mbedtls_zeroize( add_input, sizeof( add_input ) );
mbedtls_zeroize( tmp, sizeof( tmp ) );
return( 0 );
}