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Fix crypt_and_hash decrypt issue when used with stream cipher

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crypt_and_hash decryption fails when used with a stream cipher
mode of operation due to the input not being multiple of block
size, this only applies to block cipher modes and not stream
ciphers.This change exempts CTR, CFB & OFB modes from this check.

Signed-off-by: Waleed Elmelegy <waleed.elmelegy@arm.com>
This commit is contained in:
Waleed Elmelegy 2023-06-09 16:58:01 +01:00
parent 8eaf2d2ac9
commit 6eb4626e3f
1 changed files with 3 additions and 0 deletions
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3
programs/aes/crypt_and_hash.c
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@ -409,6 +409,9 @@ int main(int argc, char *argv[])
* Check the file size. * Check the file size.
*/ */
if (cipher_info->mode != MBEDTLS_MODE_GCM && if (cipher_info->mode != MBEDTLS_MODE_GCM &&
cipher_info->mode != MBEDTLS_MODE_CTR &&
cipher_info->mode != MBEDTLS_MODE_CFB &&
cipher_info->mode != MBEDTLS_MODE_OFB &&
((filesize - mbedtls_md_get_size(md_info)) % ((filesize - mbedtls_md_get_size(md_info)) %
mbedtls_cipher_get_block_size(&cipher_ctx)) != 0) { mbedtls_cipher_get_block_size(&cipher_ctx)) != 0) {
mbedtls_fprintf(stderr, "File content not a multiple of the block size (%u).\n", mbedtls_fprintf(stderr, "File content not a multiple of the block size (%u).\n",