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crypto: qat - check cipher length for aead AES-CBC-HMAC-SHA 

Return -EINVAL for authenc(hmac(sha1),cbc(aes)),
authenc(hmac(sha256),cbc(aes)) and authenc(hmac(sha512),cbc(aes))
if the cipher length is not multiple of the AES block.
This is to prevent an undefined device behaviour.

Fixes: d370cec321 ("crypto: qat - Intel(R) QAT crypto interface")
Cc: <stable@vger.kernel.org>
Signed-off-by: Dominik Przychodni <dominik.przychodni@intel.com>
[giovanni.cabiddu@intel.com: reworded commit message]
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dominik Przychodni 2020-08-31 11:59:59 +01:00 committed by Herbert Xu
parent 3ec25b43fa
commit 45cb6653b0
1 changed files with 9 additions and 1 deletions
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10
drivers/crypto/qat/qat_common/qat_algs.c
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@ -828,6 +828,11 @@ static int qat_alg_aead_dec(struct aead_request *areq)
struct icp_qat_fw_la_bulk_req *msg;
int digst_size = crypto_aead_authsize(aead_tfm);
int ret, ctr = 0;
u32 cipher_len;
cipher_len = areq->cryptlen - digst_size;
if (cipher_len % AES_BLOCK_SIZE != 0)
return -EINVAL;
ret = qat_alg_sgl_to_bufl(ctx->inst, areq->src, areq->dst, qat_req);
if (unlikely(ret))
@ -842,7 +847,7 @@ static int qat_alg_aead_dec(struct aead_request *areq)
qat_req->req.comn_mid.src_data_addr = qat_req->buf.blp;
qat_req->req.comn_mid.dest_data_addr = qat_req->buf.bloutp;
cipher_param = (void *)&qat_req->req.serv_specif_rqpars;
cipher_param->cipher_length = areq->cryptlen - digst_size;
cipher_param->cipher_length = cipher_len;
cipher_param->cipher_offset = areq->assoclen;
memcpy(cipher_param->u.cipher_IV_array, areq->iv, AES_BLOCK_SIZE);
auth_param = (void *)((u8 *)cipher_param + sizeof(*cipher_param));
@ -871,6 +876,9 @@ static int qat_alg_aead_enc(struct aead_request *areq)
u8 *iv = areq->iv;
int ret, ctr = 0;
if (areq->cryptlen % AES_BLOCK_SIZE != 0)
return -EINVAL;
ret = qat_alg_sgl_to_bufl(ctx->inst, areq->src, areq->dst, qat_req);
if (unlikely(ret))
return ret;