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Clear temporary buffer after block crypt operation.

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Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
This commit is contained in:
Mateusz Starzyk 2021-07-27 13:54:55 +02:00
parent a9cbdfbb34
commit c52220d775
1 changed files with 3 additions and 1 deletions
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4
library/ccm.c
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@ -127,13 +127,15 @@ static int mbedtls_ccm_crypt( mbedtls_ccm_context *ctx,
if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->ctr, 16, tmp_buf, if( ( ret = mbedtls_cipher_update( &ctx->cipher_ctx, ctx->ctr, 16, tmp_buf,
&olen ) ) != 0 ) &olen ) ) != 0 )
{ {
ctx->state |= CCM_STATE__ERROR; \ ctx->state |= CCM_STATE__ERROR;
mbedtls_platform_zeroize(tmp_buf, sizeof(tmp_buf));
return ret; return ret;
} }
for( i = 0; i < use_len; i++ ) for( i = 0; i < use_len; i++ )
output[i] = input[i] ^ tmp_buf[offset + i]; output[i] = input[i] ^ tmp_buf[offset + i];
mbedtls_platform_zeroize(tmp_buf, sizeof(tmp_buf));
return ret; return ret;
} }