Exploit the System z10 hardware acceleration for SHA512.
Signed-off-by: Jan Glauber <[email protected]>
---
arch/s390/crypto/Makefile | 1
arch/s390/crypto/crypt_s390.h | 2 +
arch/s390/crypto/sha.h | 5 +-
arch/s390/crypto/sha512_s390.c | 71 +++++++++++++++++++++++++++++++++++++++++
arch/s390/crypto/sha_common.c | 11 +++++-
drivers/crypto/Kconfig | 11 ++++++
6 files changed, 97 insertions(+), 4 deletions(-)
Index: cryptodev-2.6/drivers/crypto/Kconfig
===================================================================
--- cryptodev-2.6.orig/drivers/crypto/Kconfig
+++ cryptodev-2.6/drivers/crypto/Kconfig
@@ -100,6 +100,17 @@ config CRYPTO_SHA256_S390
This version of SHA implements a 256 bit hash with 128 bits of
security against collision attacks.
+config CRYPTO_SHA512_S390
+ tristate "SHA512 digest algorithm"
+ depends on S390
+ select CRYPTO_ALGAPI
+ help
+ This is the s390 hardware accelerated implementation of the
+ SHA512 secure hash standard.
+
+ This version of SHA implements a 512 bit hash with 256 bits of
+ security against collision attacks.
+
config CRYPTO_DES_S390
tristate "DES and Triple DES cipher algorithms"
depends on S390
Index: cryptodev-2.6/arch/s390/crypto/Makefile
===================================================================
--- cryptodev-2.6.orig/arch/s390/crypto/Makefile
+++ cryptodev-2.6/arch/s390/crypto/Makefile
@@ -4,6 +4,7 @@
obj-$(CONFIG_CRYPTO_SHA1_S390) += sha1_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_SHA256_S390) += sha256_s390.o sha_common.o
+obj-$(CONFIG_CRYPTO_SHA512_S390) += sha512_s390.o sha_common.o
obj-$(CONFIG_CRYPTO_DES_S390) += des_s390.o des_check_key.o
obj-$(CONFIG_CRYPTO_AES_S390) += aes_s390.o
obj-$(CONFIG_S390_PRNG) += prng.o
Index: cryptodev-2.6/arch/s390/crypto/crypt_s390.h
===================================================================
--- cryptodev-2.6.orig/arch/s390/crypto/crypt_s390.h
+++ cryptodev-2.6/arch/s390/crypto/crypt_s390.h
@@ -82,6 +82,7 @@ enum crypt_s390_kimd_func {
KIMD_QUERY = CRYPT_S390_KIMD | 0,
KIMD_SHA_1 = CRYPT_S390_KIMD | 1,
KIMD_SHA_256 = CRYPT_S390_KIMD | 2,
+ KIMD_SHA_512 = CRYPT_S390_KIMD | 3,
};
/*
@@ -92,6 +93,7 @@ enum crypt_s390_klmd_func {
KLMD_QUERY = CRYPT_S390_KLMD | 0,
KLMD_SHA_1 = CRYPT_S390_KLMD | 1,
KLMD_SHA_256 = CRYPT_S390_KLMD | 2,
+ KLMD_SHA_512 = CRYPT_S390_KLMD | 3,
};
/*
Index: cryptodev-2.6/arch/s390/crypto/sha.h
===================================================================
--- cryptodev-2.6.orig/arch/s390/crypto/sha.h
+++ cryptodev-2.6/arch/s390/crypto/sha.h
@@ -19,11 +19,12 @@
#include <crypto/sha.h>
/* must be big enough for the largest SHA variant */
-#define SHA_MAX_BLOCK_SIZE SHA256_BLOCK_SIZE
+#define SHA_MAX_STATE_SIZE 16
+#define SHA_MAX_BLOCK_SIZE SHA512_BLOCK_SIZE
struct s390_sha_ctx {
u64 count; /* message length in bytes */
- u32 state[8];
+ u32 state[SHA_MAX_STATE_SIZE];
u8 buf[2 * SHA_MAX_BLOCK_SIZE];
int func; /* KIMD function to use */
};
Index: cryptodev-2.6/arch/s390/crypto/sha512_s390.c
===================================================================
--- /dev/null
+++ cryptodev-2.6/arch/s390/crypto/sha512_s390.c
@@ -0,0 +1,71 @@
+/*
+ * Cryptographic API.
+ *
+ * s390 implementation of the SHA512 Secure Hash Algorithm.
+ *
+ * Copyright IBM Corp. 2007
+ * Author(s): Jan Glauber ([email protected])
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+
+#include "sha.h"
+#include "crypt_s390.h"
+
+static void sha512_init(struct crypto_tfm *tfm)
+{
+ struct s390_sha_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ *(__u64 *)&ctx->state[0] = 0x6a09e667f3bcc908ULL;
+ *(__u64 *)&ctx->state[2] = 0xbb67ae8584caa73bULL;
+ *(__u64 *)&ctx->state[4] = 0x3c6ef372fe94f82bULL;
+ *(__u64 *)&ctx->state[6] = 0xa54ff53a5f1d36f1ULL;
+ *(__u64 *)&ctx->state[8] = 0x510e527fade682d1ULL;
+ *(__u64 *)&ctx->state[10] = 0x9b05688c2b3e6c1fULL;
+ *(__u64 *)&ctx->state[12] = 0x1f83d9abfb41bd6bULL;
+ *(__u64 *)&ctx->state[14] = 0x5be0cd19137e2179ULL;
+ ctx->count = 0;
+ ctx->func = KIMD_SHA_512;
+}
+
+static struct crypto_alg alg = {
+ .cra_name = "sha512",
+ .cra_driver_name = "sha512-s390",
+ .cra_priority = CRYPT_S390_PRIORITY,
+ .cra_flags = CRYPTO_ALG_TYPE_DIGEST,
+ .cra_blocksize = SHA512_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct s390_sha_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(alg.cra_list),
+ .cra_u = { .digest = {
+ .dia_digestsize = SHA512_DIGEST_SIZE,
+ .dia_init = sha512_init,
+ .dia_update = s390_sha_update,
+ .dia_final = s390_sha_final } }
+};
+
+static int __init init(void)
+{
+ if (!crypt_s390_func_available(KIMD_SHA_512))
+ return -EOPNOTSUPP;
+ return crypto_register_alg(&alg);
+}
+
+static void __exit fini(void)
+{
+ crypto_unregister_alg(&alg);
+}
+
+module_init(init);
+module_exit(fini);
+
+MODULE_ALIAS("sha512");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm");
Index: cryptodev-2.6/arch/s390/crypto/sha_common.c
===================================================================
--- cryptodev-2.6.orig/arch/s390/crypto/sha_common.c
+++ cryptodev-2.6/arch/s390/crypto/sha_common.c
@@ -59,12 +59,15 @@ void s390_sha_final(struct crypto_tfm *t
struct s390_sha_ctx *ctx = crypto_tfm_ctx(tfm);
unsigned int bsize = crypto_tfm_alg_blocksize(tfm);
u64 bits;
- unsigned int index, end;
+ unsigned int index, end, plen;
int ret;
+ /* SHA-512 uses 128 bit padding length */
+ plen = (bsize > SHA256_BLOCK_SIZE) ? 16 : 8;
+
/* must perform manual padding */
index = ctx->count & (bsize - 1);
- end = (index < bsize - 8) ? bsize : (2 * bsize);
+ end = (index < bsize - plen) ? bsize : (2 * bsize);
/* start pad with 1 */
ctx->buf[index] = 0x80;
@@ -73,6 +76,10 @@ void s390_sha_final(struct crypto_tfm *t
/* pad with zeros */
memset(ctx->buf + index, 0x00, end - index - 8);
+ /*
+ * Append message length. Well, SHA-512 wants a 128 bit lenght value,
+ * nevertheless we use u64, should be enough for now...
+ */
bits = ctx->count * 8;
memcpy(ctx->buf + end - 8, &bits, sizeof(bits));