-From: Tom Lendacky <thomas.lendacky@amd.com>
-Subject: [PATCH v1] crypto: ccp - Add hash state import and export support
-Date: Tue, 12 Jan 2016 11:17:38 -0600
-Message-ID: <20160112171738.23496.44254.stgit@tlendack-t1.amdoffice.net>
-Mime-Version: 1.0
-Content-Type: text/plain; charset="utf-8"
-Content-Transfer-Encoding: 7bit
-Cc: Herbert Xu <herbert@gondor.apana.org.au>, <stable@vger.kernel.org>,
- "David Miller" <davem@davemloft.net>
-To: <linux-crypto@vger.kernel.org>
-
-Commit 8996eafdcbad ("crypto: ahash - ensure statesize is non-zero")
-added a check to prevent ahash algorithms from successfully registering
-if the import and export functions were not implemented. This prevents
-an oops in the hash_accept function of algif_hash. This commit causes
-the ccp-crypto module SHA support and AES CMAC support from successfully
-registering and causing the ccp-crypto module load to fail because the
-ahash import and export functions are not implemented.
-
-Update the CCP Crypto API support to provide import and export support
-for ahash algorithms.
-
-Cc: <stable@vger.kernel.org> # 3.14.x-
-Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
----
- drivers/crypto/ccp/ccp-crypto-aes-cmac.c | 23 +++++++++++++++++++++++
- drivers/crypto/ccp/ccp-crypto-sha.c | 23 +++++++++++++++++++++++
- 2 files changed, 46 insertions(+)
-
---- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
-+++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
-@@ -220,6 +220,26 @@ static int ccp_aes_cmac_digest(struct ah
- return ccp_aes_cmac_finup(req);
- }
-
-+static int ccp_aes_cmac_export(struct ahash_request *req, void *out)
-+{
-+ struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req);
-+ struct ccp_aes_cmac_req_ctx *state = out;
-+
-+ *state = *rctx;
-+
-+ return 0;
-+}
-+
-+static int ccp_aes_cmac_import(struct ahash_request *req, const void *in)
-+{
-+ struct ccp_aes_cmac_req_ctx *rctx = ahash_request_ctx(req);
-+ const struct ccp_aes_cmac_req_ctx *state = in;
-+
-+ *rctx = *state;
-+
-+ return 0;
-+}
-+
- static int ccp_aes_cmac_setkey(struct crypto_ahash *tfm, const u8 *key,
- unsigned int key_len)
- {
-@@ -352,10 +372,13 @@ int ccp_register_aes_cmac_algs(struct li
- alg->final = ccp_aes_cmac_final;
- alg->finup = ccp_aes_cmac_finup;
- alg->digest = ccp_aes_cmac_digest;
-+ alg->export = ccp_aes_cmac_export;
-+ alg->import = ccp_aes_cmac_import;
- alg->setkey = ccp_aes_cmac_setkey;
-
- halg = &alg->halg;
- halg->digestsize = AES_BLOCK_SIZE;
-+ halg->statesize = sizeof(struct ccp_aes_cmac_req_ctx);
-
- base = &halg->base;
- snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "cmac(aes)");
---- a/drivers/crypto/ccp/ccp-crypto-sha.c
-+++ b/drivers/crypto/ccp/ccp-crypto-sha.c
-@@ -207,6 +207,26 @@ static int ccp_sha_digest(struct ahash_r
- return ccp_sha_finup(req);
- }
-
-+static int ccp_sha_export(struct ahash_request *req, void *out)
-+{
-+ struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
-+ struct ccp_sha_req_ctx *state = out;
-+
-+ *state = *rctx;
-+
-+ return 0;
-+}
-+
-+static int ccp_sha_import(struct ahash_request *req, const void *in)
-+{
-+ struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
-+ const struct ccp_sha_req_ctx *state = in;
-+
-+ *rctx = *state;
-+
-+ return 0;
-+}
-+
- static int ccp_sha_setkey(struct crypto_ahash *tfm, const u8 *key,
- unsigned int key_len)
- {
-@@ -403,9 +423,12 @@ static int ccp_register_sha_alg(struct l
- alg->final = ccp_sha_final;
- alg->finup = ccp_sha_finup;
- alg->digest = ccp_sha_digest;
-+ alg->export = ccp_sha_export;
-+ alg->import = ccp_sha_import;
-
- halg = &alg->halg;
- halg->digestsize = def->digest_size;
-+ halg->statesize = sizeof(struct ccp_sha_req_ctx);
-
- base = &halg->base;
- snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
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