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authorTom Lendacky <thomas.lendacky@amd.com>2016-01-12 11:17:38 -0600
committerHerbert Xu <herbert@gondor.apana.org.au>2016-01-25 22:39:03 +0800
commit952bce9792e6bf36fda09c2e5718abb5d9327369 (patch)
tree359ceba8c362fe0c6bb73ddf15a377a5cc8f824d /drivers/crypto/ccp
parent624144a7eb2c9abcf76722d29f983cdf9801bb2e (diff)
downloadlinux-952bce9792e6bf36fda09c2e5718abb5d9327369.tar.gz
crypto: ccp - Add hash state import and export support
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> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccp')
-rw-r--r--drivers/crypto/ccp/ccp-crypto-aes-cmac.c23
-rw-r--r--drivers/crypto/ccp/ccp-crypto-sha.c23
2 files changed, 46 insertions, 0 deletions
diff --git a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
index d89f20c04266..00207cf5c79b 100644
--- 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 ahash_request *req)
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 list_head *head)
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)");
diff --git a/drivers/crypto/ccp/ccp-crypto-sha.c b/drivers/crypto/ccp/ccp-crypto-sha.c
index d14b3f28e010..3aae58def106 100644
--- 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_request *req)
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 list_head *head,
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);