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[PATCH 3.19.y-ckt 022/170] crypto: ccp - Add hash state import and export support

From Kamal Mostafa <kamal@canonical.com>
Newsgroups linux.kernel
Subject [PATCH 3.19.y-ckt 022/170] crypto: ccp - Add hash state import and export support
Date 2016-04-02 03:40 +0200
Message-ID <rjiHD-4AY-7@gated-at.bofh.it> (permalink)
References <rji4V-3Y5-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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3.19.8-ckt18 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Tom Lendacky <thomas.lendacky@amd.com>

commit 952bce9792e6bf36fda09c2e5718abb5d9327369 upstream.

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.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/crypto/ccp/ccp-crypto-aes-cmac.c | 23 +++++++++++++++++++++++
 drivers/crypto/ccp/ccp-crypto-sha.c      | 23 +++++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
index 8e162ad..504d6da 100644
--- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
+++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
@@ -201,6 +201,26 @@ 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)
 {
@@ -332,10 +352,13 @@ 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 9653157..33e52f0 100644
--- a/drivers/crypto/ccp/ccp-crypto-sha.c
+++ b/drivers/crypto/ccp/ccp-crypto-sha.c
@@ -193,6 +193,26 @@ 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)
 {
@@ -388,9 +408,12 @@ 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);
-- 
2.7.4

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  [PATCH 3.19.y-ckt 060/170] mtip32xx: Handle safe removal during IO Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 090/170] ALSA: intel8x0: Add clock quirk entry for AD1981B on IBM ThinkPad X41. Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 087/170] xtensa: fix preemption in {clear,copy}_user_highpage Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 078/170] jbd2: fix FS corruption possibility in jbd2_journal_destroy() on umount path Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 072/170] bcache: cleaned up error handling around register_cache() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 070/170] sched/cputime: Fix steal_account_process_tick() to always return jiffies Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 083/170] iser-target: Fix identification of login rx descriptor type Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 081/170] ALSA: pcm: Avoid "BUG:" string for warnings again Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 050/170] IB/srpt: Simplify srpt_handle_tsk_mgmt() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 077/170] sg: fix dxferp in from_to case Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 073/170] bcache: fix cache_set_flush() NULL pointer dereference on OOM Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 088/170] xtensa: clear all DBREAKC registers on start Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:30 +0200
  [PATCH 3.19.y-ckt 025/170] [media] pwc: Add USB id for Philips Spc880nc webcam Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 022/170] crypto: ccp - Add hash state import and export support Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 029/170] net: irda: Fix use-after-free in irtty_open() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 027/170] crypto: ccp - Don't assume export/import areas are aligned Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 026/170] crypto: ccp - Limit the amount of information exported Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 028/170] 8250: use callbacks to access UART_DLL/UART_DLM Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 019/170] cpu: Provide smpboot_thread_init() on !CONFIG_SMP kernels as well Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 018/170] cpu: Defer smpboot kthread unparking until CPU known to scheduler Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 046/170] crypto: ccp - memset request context to zero during import Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 045/170] md/raid5: Compare apples to apples (or sectors to sectors) Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 051/170] [media] bttv: Width must be a multiple of 16 when capturing planar formats Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 043/170] mtd: onenand: fix deadlock in onenand_block_markbad Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 040/170] Bluetooth: Add new AR3012 ID 0489:e095 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 039/170] Bluetooth: btusb: Add new AR3012 ID 13d3:3395 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 037/170] [media] saa7134: Fix bytesperline not being set correctly for planar formats Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 023/170] tty: Fix GPF in flush_to_ldisc(), part 2 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 044/170] PCI: Disable IO/MEM decoding for devices with non-compliant BARs Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 049/170] mmc: sdhci: fix data timeout (part 2) Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 047/170] Bluetooth: btusb: Add a new AR3012 ID 04ca:3014 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 033/170] usb: retry reset if a device times out Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 038/170] perf tools: Dont stop PMU parsing on alias parse error Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 035/170] scripts/coccinelle: modernize & Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 034/170] HID: fix hid_ignore_special_drivers module parameter Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 031/170] tools/hv: Use include/uapi with __EXPORTED_HEADERS__ Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 041/170] aacraid: Fix memory leak in aac_fib_map_free Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 030/170] staging: comedi: ni_tiocmd: change mistaken use of start_src for start_arg Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 053/170] nfsd4: fix bad bounds checking Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 032/170] ARM: dts: armada-375: use armada-370-sata for SATA Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 042/170] aic7xxx: Fix queue depth handling Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 024/170] [media] media: v4l2-compat-ioctl32: fix missing length copy in put_v4l2_buffer32 Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 021/170] EDAC, amd64_edac: Shift wrapping issue in f1x_get_norm_dct_addr() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:40 +0200
  [PATCH 3.19.y-ckt 003/170] crypto: algif_hash - Require setkey before accept(2) Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 013/170] ALSA: usb-audio: Fix NULL dereference in create_fixed_stream_quirk() Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 008/170] crypto: algif_hash - Fix race condition in hash_check_key Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 005/170] crypto: algif_skcipher - Add key check exception for cipher_null Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 015/170] include/linux/poison.h: fix LIST_POISON{1,2} offset Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 017/170] USB: cdc-acm: more sanity checking Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 012/170] USB: iowarrior: fix oops with malicious USB descriptors Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 006/170] crypto: algif_hash - Remove custom release parent function Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 002/170] crypto: algif_skcipher - Add nokey compatibility path Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 014/170] ALSA: usb-audio: Add sanity checks for endpoint accesses Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 004/170] crypto: skcipher - Add crypto_skcipher_has_setkey Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 007/170] crypto: algif_skcipher - Remove custom release parent function Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200
  [PATCH 3.19.y-ckt 009/170] crypto: algif_skcipher - Fix race condition in skcipher_check_key Kamal Mostafa <kamal@canonical.com> - 2016-04-02 03:50 +0200

csiph-web