[PATCH v1] crypto/qat: fix null hash algorithm digest size

[Brian Dooley]

Add check for null hash algorithm digest size. Digest size should be 4B
or request will be rejected.

Fixes: 1703e94ac5ce ("qat: add driver for QuickAssist devices")
Cc: declan.dohe...@intel.com
Cc: sta...@dpdk.org
Signed-off-by: Brian Dooley <brian.doo...@intel.com>
---
 drivers/crypto/qat/qat_sym_session.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/qat/qat_sym_session.c 
b/drivers/crypto/qat/qat_sym_session.c
index d96122b208..ff4b537706 100644
--- a/drivers/crypto/qat/qat_sym_session.c
+++ b/drivers/crypto/qat/qat_sym_session.c
@@ -2040,7 +2040,12 @@ int qat_sym_cd_auth_set(struct qat_sym_session *cdesc,
        hash_offset = cdesc->cd_cur_ptr-((uint8_t *)&cdesc->cd);
        hash = (struct icp_qat_hw_auth_setup *)cdesc->cd_cur_ptr;
        hash->auth_config.reserved = 0;
-       hash->auth_config.config =
+       if (cdesc->qat_hash_alg == ICP_QAT_HW_AUTH_ALGO_NULL)
+               hash->auth_config.config =
+                       ICP_QAT_HW_AUTH_CONFIG_BUILD(cdesc->auth_mode,
+                               cdesc->qat_hash_alg, 4);
+       else
+               hash->auth_config.config =
                        ICP_QAT_HW_AUTH_CONFIG_BUILD(cdesc->auth_mode,
                                cdesc->qat_hash_alg, digestsize);
 
@@ -2408,10 +2413,16 @@ int qat_sym_cd_auth_set(struct qat_sym_session *cdesc,
        /* Auth CD config setup */
        hash_cd_ctrl->hash_cfg_offset = hash_offset >> 3;
        hash_cd_ctrl->hash_flags = ICP_QAT_FW_AUTH_HDR_FLAG_NO_NESTED;
-       hash_cd_ctrl->inner_res_sz = digestsize;
-       hash_cd_ctrl->final_sz = digestsize;
        hash_cd_ctrl->inner_state1_sz = state1_size;
-       auth_param->auth_res_sz = digestsize;
+       if (cdesc->qat_hash_alg == ICP_QAT_HW_AUTH_ALGO_NULL) {
+               hash_cd_ctrl->inner_res_sz = 4;
+               hash_cd_ctrl->final_sz = 4;
+               auth_param->auth_res_sz = 4;
+       } else {
+               hash_cd_ctrl->inner_res_sz = digestsize;
+               hash_cd_ctrl->final_sz = digestsize;
+               auth_param->auth_res_sz = digestsize;
+       }
 
        hash_cd_ctrl->inner_state2_sz  = state2_size;
        hash_cd_ctrl->inner_state2_offset = hash_cd_ctrl->hash_cfg_offset +
-- 
2.25.1