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crypto: inside-secure - Added support for basic SM3 ahash

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Added support for the SM3 ahash algorithm

changes since v1:
- moved definition of CONTEXT_CONTROL_CRYPTO_ALG_SM3 (0x7) up above 0xf

changes since v2:
- allow compilation if CONFIG_CRYPTO_SM3 is not set

Acked-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Pascal van Leeuwen 2019-09-13 17:20:36 +02:00 committed by Herbert Xu
parent fc0f82b179
commit 0f2bc13181
3 changed files with 73 additions and 0 deletions
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1
drivers/crypto/inside-secure/safexcel.c
View File

@ -1176,6 +1176,7 @@ static struct safexcel_alg_template *safexcel_algs[] = {
&safexcel_alg_chacha20,
&safexcel_alg_chachapoly,
&safexcel_alg_chachapoly_esp,
&safexcel_alg_sm3,
};
static int safexcel_register_algorithms(struct safexcel_crypto_priv *priv)

8
drivers/crypto/inside-secure/safexcel.h
View File

@ -373,6 +373,7 @@ struct safexcel_context_record {
#define CONTEXT_CONTROL_CRYPTO_ALG_XCBC128 (0x1 << 23)
#define CONTEXT_CONTROL_CRYPTO_ALG_XCBC192 (0x2 << 23)
#define CONTEXT_CONTROL_CRYPTO_ALG_XCBC256 (0x3 << 23)
#define CONTEXT_CONTROL_CRYPTO_ALG_SM3 (0x7 << 23)
#define CONTEXT_CONTROL_CRYPTO_ALG_POLY1305 (0xf << 23)
#define CONTEXT_CONTROL_INV_FR (0x5 << 24)
#define CONTEXT_CONTROL_INV_TR (0x6 << 24)
@ -663,6 +664,12 @@ enum safexcel_eip_version {
/* Priority we use for advertising our algorithms */
#define SAFEXCEL_CRA_PRIORITY 300
/* SM3 digest result for zero length message */
#define EIP197_SM3_ZEROM_HASH "\x1A\xB2\x1D\x83\x55\xCF\xA1\x7F" \
"\x8E\x61\x19\x48\x31\xE8\x1A\x8F" \
"\x22\xBE\xC8\xC7\x28\xFE\xFB\x74" \
"\x7E\xD0\x35\xEB\x50\x82\xAA\x2B"
/* EIP algorithm presence flags */
enum safexcel_eip_algorithms {
SAFEXCEL_ALG_BC0 = BIT(5),
@ -869,5 +876,6 @@ extern struct safexcel_alg_template safexcel_alg_cmac;
extern struct safexcel_alg_template safexcel_alg_chacha20;
extern struct safexcel_alg_template safexcel_alg_chachapoly;
extern struct safexcel_alg_template safexcel_alg_chachapoly_esp;
extern struct safexcel_alg_template safexcel_alg_sm3;
#endif

64
drivers/crypto/inside-secure/safexcel_hash.c
View File

@ -10,6 +10,7 @@
#include <crypto/md5.h>
#include <crypto/sha.h>
#include <crypto/skcipher.h>
#include <crypto/sm3.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
@ -776,6 +777,14 @@ static int safexcel_ahash_final(struct ahash_request *areq)
else if (ctx->alg == CONTEXT_CONTROL_CRYPTO_ALG_SHA512)
memcpy(areq->result, sha512_zero_message_hash,
SHA512_DIGEST_SIZE);
else if (ctx->alg == CONTEXT_CONTROL_CRYPTO_ALG_SM3) {
if (IS_ENABLED(CONFIG_CRYPTO_SM3))
memcpy(areq->result, sm3_zero_message_hash,
SM3_DIGEST_SIZE);
else
memcpy(areq->result,
EIP197_SM3_ZEROM_HASH, SM3_DIGEST_SIZE);
}
return 0;
} else if (unlikely(req->digest == CONTEXT_CONTROL_DIGEST_XCM &&
@ -2221,3 +2230,58 @@ struct safexcel_alg_template safexcel_alg_cmac = {
},
},
};
static int safexcel_sm3_init(struct ahash_request *areq)
{
struct safexcel_ahash_ctx *ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(areq));
struct safexcel_ahash_req *req = ahash_request_ctx(areq);
memset(req, 0, sizeof(*req));
ctx->alg = CONTEXT_CONTROL_CRYPTO_ALG_SM3;
req->digest = CONTEXT_CONTROL_DIGEST_PRECOMPUTED;
req->state_sz = SM3_DIGEST_SIZE;
req->block_sz = SM3_BLOCK_SIZE;
return 0;
}
static int safexcel_sm3_digest(struct ahash_request *areq)
{
int ret = safexcel_sm3_init(areq);
if (ret)
return ret;
return safexcel_ahash_finup(areq);
}
struct safexcel_alg_template safexcel_alg_sm3 = {
.type = SAFEXCEL_ALG_TYPE_AHASH,
.algo_mask = SAFEXCEL_ALG_SM3,
.alg.ahash = {
.init = safexcel_sm3_init,
.update = safexcel_ahash_update,
.final = safexcel_ahash_final,
.finup = safexcel_ahash_finup,
.digest = safexcel_sm3_digest,
.export = safexcel_ahash_export,
.import = safexcel_ahash_import,
.halg = {
.digestsize = SM3_DIGEST_SIZE,
.statesize = sizeof(struct safexcel_ahash_export_state),
.base = {
.cra_name = "sm3",
.cra_driver_name = "safexcel-sm3",
.cra_priority = SAFEXCEL_CRA_PRIORITY,
.cra_flags = CRYPTO_ALG_ASYNC |
CRYPTO_ALG_KERN_DRIVER_ONLY,
.cra_blocksize = SM3_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct safexcel_ahash_ctx),
.cra_init = safexcel_ahash_cra_init,
.cra_exit = safexcel_ahash_cra_exit,
.cra_module = THIS_MODULE,
},
},
},
};