[OpenWrt-Devel] [PATCH 3/3] kernel: add patch to fix the ccp-crypto module

[Stijn Tintel]

Signed-off-by: Stijn Tintel <stijn at linux-ipv6.be>
---
 ...-add-hash-state-import-and-export-support.patch | 114 +++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 target/linux/generic/patches-4.4/150-crypto-ccp-add-hash-state-import-and-export-support.patch

diff --git a/target/linux/generic/patches-4.4/150-crypto-ccp-add-hash-state-import-and-export-support.patch b/target/linux/generic/patches-4.4/150-crypto-ccp-add-hash-state-import-and-export-support.patch
new file mode 100644
index 0000000..986ac5d
--- /dev/null
+++ b/target/linux/generic/patches-4.4/150-crypto-ccp-add-hash-state-import-and-export-support.patch
@@ -0,0 +1,114 @@
+From: Tom Lendacky <thomas.lendacky at 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 at tlendack-t1.amdoffice.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset="utf-8"
+Content-Transfer-Encoding: 7bit
+Cc: Herbert Xu <herbert at gondor.apana.org.au>, <stable at vger.kernel.org>,
+	"David Miller" <davem at davemloft.net>
+To: <linux-crypto at 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 at vger.kernel.org> # 3.14.x-
+Signed-off-by: Tom Lendacky <thomas.lendacky at 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);
-- 
2.4.10
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