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mbedtls: fix esp_aes_crypt_ctr writing to null stream block

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This commit is contained in:
harshal.patil 2022-12-08 10:26:25 +05:30
parent 06bb0ee077
commit 48840d04f0
1 changed files with 2 additions and 1 deletions
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3
components/mbedtls/port/aes/esp_aes_gcm.c
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@ -496,6 +496,7 @@ int esp_aes_gcm_finish( esp_gcm_context *ctx,
{
size_t nc_off = 0;
uint8_t len_block[AES_BLOCK_BYTES] = {0};
uint8_t stream[AES_BLOCK_BYTES] = {0};
if ( tag_len > 16 || tag_len < 4 ) {
return ( MBEDTLS_ERR_GCM_BAD_INPUT );
@ -507,7 +508,7 @@ int esp_aes_gcm_finish( esp_gcm_context *ctx,
esp_gcm_ghash(ctx, len_block, AES_BLOCK_BYTES, ctx->ghash);
/* Tag T = GCTR(J0, ) where T is truncated to tag_len */
esp_aes_crypt_ctr(&ctx->aes_ctx, tag_len, &nc_off, ctx->ori_j0, 0, ctx->ghash, tag);
esp_aes_crypt_ctr(&ctx->aes_ctx, tag_len, &nc_off, ctx->ori_j0, stream, ctx->ghash, tag);
return 0;
}