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csrypto: ccp - Expand RSA support for a v5 ccp - kernel/git/torvalds/linux.git - Linux kernel source tree

  • ️Mon Jul 17 2017
authorGary R Hook <gary.hook@amd.com>2017-07-17 15:16:42 -0500
committerHerbert Xu <herbert@gondor.apana.org.au>2017-07-28 17:58:06 +0800
commite28c190db66830c04b403b7eba7f8a5b53c22ffc (patch)
tree9bf7a348288769ba4396d3e9741fd2ce64b398d5
parentceeec0afd684fdfde285469df0ead6c3ab53513e (diff)
downloadlinux-e28c190db66830c04b403b7eba7f8a5b53c22ffc.tar.gz

csrypto: ccp - Expand RSA support for a v5 ccp

A version 5 CCP can handle an RSA modulus up to 16k bits. Signed-off-by: Gary R Hook <gary.hook@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

-rw-r--r--drivers/crypto/ccp/ccp-crypto-rsa.c5
-rw-r--r--drivers/crypto/ccp/ccp-crypto.h1
-rw-r--r--drivers/crypto/ccp/ccp-dev-v3.c1
-rw-r--r--drivers/crypto/ccp/ccp-dev-v5.c2
-rw-r--r--drivers/crypto/ccp/ccp-dev.h1
-rw-r--r--drivers/crypto/ccp/ccp-ops.c3
-rw-r--r--drivers/crypto/ccp/sp-dev.h1

7 files changed, 12 insertions, 2 deletions

diff --git a/drivers/crypto/ccp/ccp-crypto-rsa.c b/drivers/crypto/ccp/ccp-crypto-rsa.c
index d5544943f5f0c2..e6db8672d89c43 100644
--- a/drivers/crypto/ccp/ccp-crypto-rsa.c
+++ b/drivers/crypto/ccp/ccp-crypto-rsa.c

@@ -60,7 +60,10 @@ static int ccp_rsa_complete(struct crypto_async_request *async_req, int ret)

static unsigned int ccp_rsa_maxsize(struct crypto_akcipher *tfm)

{

- return CCP_RSA_MAXMOD;

+ if (ccp_version() > CCP_VERSION(3, 0))

+ return CCP5_RSA_MAXMOD;

+ else

+ return CCP_RSA_MAXMOD;

}

static int ccp_rsa_crypt(struct akcipher_request *req, bool encrypt)

diff --git a/drivers/crypto/ccp/ccp-crypto.h b/drivers/crypto/ccp/ccp-crypto.h
index aa53b97f6f006b..67c7620029e38d 100644
--- a/drivers/crypto/ccp/ccp-crypto.h
+++ b/drivers/crypto/ccp/ccp-crypto.h

@@ -255,6 +255,7 @@ struct ccp_rsa_req_ctx {

};

#define CCP_RSA_MAXMOD (4 * 1024 / 8)

+#define CCP5_RSA_MAXMOD (16 * 1024 / 8)

/***** Common Context Structure *****/

struct ccp_ctx {

diff --git a/drivers/crypto/ccp/ccp-dev-v3.c b/drivers/crypto/ccp/ccp-dev-v3.c
index c2861749e2ad36..240bebbcb8ac7c 100644
--- a/drivers/crypto/ccp/ccp-dev-v3.c
+++ b/drivers/crypto/ccp/ccp-dev-v3.c

@@ -597,4 +597,5 @@ const struct ccp_vdata ccpv3 = {

.setup = NULL,

.perform = &ccp3_actions,

.offset = 0x20000,

+ .rsamax = CCP_RSA_MAX_WIDTH,

};

diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c
index 5f9e82beadfd25..6ace6dd5a239c6 100644
--- a/drivers/crypto/ccp/ccp-dev-v5.c
+++ b/drivers/crypto/ccp/ccp-dev-v5.c

@@ -1112,6 +1112,7 @@ const struct ccp_vdata ccpv5a = {

.setup = ccp5_config,

.perform = &ccp5_actions,

.offset = 0x0,

+ .rsamax = CCP5_RSA_MAX_WIDTH,

};

const struct ccp_vdata ccpv5b = {

@@ -1120,4 +1121,5 @@ const struct ccp_vdata ccpv5b = {

.setup = ccp5other_config,

.perform = &ccp5_actions,

.offset = 0x0,

+ .rsamax = CCP5_RSA_MAX_WIDTH,

};

diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h
index 9320931d89dae9..1f6deee117a739 100644
--- a/drivers/crypto/ccp/ccp-dev.h
+++ b/drivers/crypto/ccp/ccp-dev.h

@@ -202,6 +202,7 @@

#define CCP_SHA_SB_COUNT 1

#define CCP_RSA_MAX_WIDTH 4096

+#define CCP5_RSA_MAX_WIDTH 16384

#define CCP_PASSTHRU_BLOCKSIZE 256

#define CCP_PASSTHRU_MASKSIZE 32

diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index 1b757531f79a06..40c062ad872632 100644
--- a/drivers/crypto/ccp/ccp-ops.c
+++ b/drivers/crypto/ccp/ccp-ops.c

@@ -1736,7 +1736,8 @@ static int ccp_run_rsa_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)

unsigned int sb_count, i_len, o_len;

int ret;

- if (rsa->key_size > CCP_RSA_MAX_WIDTH)

+ /* Check against the maximum allowable size, in bits */

+ if (rsa->key_size > cmd_q->ccp->vdata->rsamax)

return -EINVAL;

if (!rsa->exp || !rsa->mod || !rsa->src || !rsa->dst)

diff --git a/drivers/crypto/ccp/sp-dev.h b/drivers/crypto/ccp/sp-dev.h
index 3520da4e20cfaa..5ab486ade1ad93 100644
--- a/drivers/crypto/ccp/sp-dev.h
+++ b/drivers/crypto/ccp/sp-dev.h

@@ -40,6 +40,7 @@ struct ccp_vdata {

void (*setup)(struct ccp_device *);

const struct ccp_actions *perform;

const unsigned int offset;

+ const unsigned int rsamax;

};

/* Structure to hold SP device data */

struct sp_dev_vdata {