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authorJan Glauber <jang@linux.vnet.ibm.com>2008-03-06 19:52:00 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2008-04-21 10:19:21 +0800
commit291dc7c0996b09a7c58b2cf6e9cc3495123a607e (patch)
treedf678f61c217baddb3c959166639e919be637193 /arch/s390/crypto
parent604973f1fe41b817c1badb3df2008fe641e50ae6 (diff)
downloadlinux-linaro-android-291dc7c0996b09a7c58b2cf6e9cc3495123a607e.tar.gz
[CRYPTO] sha512: Hardware acceleration for s390
Exploit the System z10 hardware acceleration for SHA512. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/s390/crypto')
-rw-r--r--arch/s390/crypto/Makefile1
-rw-r--r--arch/s390/crypto/crypt_s390.h2
-rw-r--r--arch/s390/crypto/sha.h5
-rw-r--r--arch/s390/crypto/sha512_s390.c71
-rw-r--r--arch/s390/crypto/sha_common.c11
5 files changed, 86 insertions, 4 deletions
diff --git a/arch/s390/crypto/Makefile b/arch/s390/crypto/Makefile
index 5f1a5f89cc9..6a1157fa4f9 100644
--- a/arch/s390/crypto/Makefile
+++ b/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
diff --git a/arch/s390/crypto/crypt_s390.h b/arch/s390/crypto/crypt_s390.h
index 95f5160df27..9992f95ef99 100644
--- a/arch/s390/crypto/crypt_s390.h
+++ b/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,
};
/*
diff --git a/arch/s390/crypto/sha.h b/arch/s390/crypto/sha.h
index b7a52ab5db9..1ceafa571ea 100644
--- a/arch/s390/crypto/sha.h
+++ b/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 */
};
diff --git a/arch/s390/crypto/sha512_s390.c b/arch/s390/crypto/sha512_s390.c
new file mode 100644
index 00000000000..4d651bbce0f
--- /dev/null
+++ b/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 (jang@de.ibm.com)
+ *
+ * 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");
diff --git a/arch/s390/crypto/sha_common.c b/arch/s390/crypto/sha_common.c
index 80b6f2ba005..9d6eb8c3d37 100644
--- a/arch/s390/crypto/sha_common.c
+++ b/arch/s390/crypto/sha_common.c
@@ -59,12 +59,15 @@ void s390_sha_final(struct crypto_tfm *tfm, u8 *out)
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 *tfm, u8 *out)
/* 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));