diff options
Diffstat (limited to 'drivers/crypto/bcm/cipher.c')
| -rw-r--r-- | drivers/crypto/bcm/cipher.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/crypto/bcm/cipher.c b/drivers/crypto/bcm/cipher.c index 869602fcfd96..1c23e452700b 100644 --- a/drivers/crypto/bcm/cipher.c +++ b/drivers/crypto/bcm/cipher.c @@ -2629,6 +2629,19 @@ static int aead_need_fallback(struct aead_request *req) return 1; } + /* + * RFC4106 and RFC4543 cannot handle the case where AAD is other than + * 16 or 20 bytes long. So use fallback in this case. + */ + if (ctx->cipher.mode == CIPHER_MODE_GCM && + ctx->cipher.alg == CIPHER_ALG_AES && + rctx->iv_ctr_len == GCM_RFC4106_IV_SIZE && + req->assoclen != 16 && req->assoclen != 20) { + flow_log("RFC4106/RFC4543 needs fallback for assoclen" + " other than 16 or 20 bytes\n"); + return 1; + } + payload_len = req->cryptlen; if (spu->spu_type == SPU_TYPE_SPUM) payload_len += req->assoclen; |