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Diffstat (limited to 'arch/s390/crypto/sha1_s390.c')
-rw-r--r--arch/s390/crypto/sha1_s390.c83
1 files changed, 37 insertions, 46 deletions
diff --git a/arch/s390/crypto/sha1_s390.c b/arch/s390/crypto/sha1_s390.c
index 49ca8690ee39..969639f31977 100644
--- a/arch/s390/crypto/sha1_s390.c
+++ b/arch/s390/crypto/sha1_s390.c
@@ -8,8 +8,9 @@
* implementation written by Steve Reid.
*
* s390 Version:
- * Copyright (C) 2003 IBM Deutschland GmbH, IBM Corporation
- * Author(s): Thomas Spatzier (tspat@de.ibm.com)
+ * Copyright IBM Corp. 2003,2007
+ * Author(s): Thomas Spatzier
+ * Jan Glauber (jan.glauber@de.ibm.com)
*
* Derived from "crypto/sha1.c"
* Copyright (c) Alan Smithee.
@@ -43,16 +44,14 @@ struct crypt_s390_sha1_ctx {
static void sha1_init(struct crypto_tfm *tfm)
{
struct crypt_s390_sha1_ctx *ctx = crypto_tfm_ctx(tfm);
- static const u32 initstate[5] = {
- 0x67452301,
- 0xEFCDAB89,
- 0x98BADCFE,
- 0x10325476,
- 0xC3D2E1F0
- };
+
+ ctx->state[0] = 0x67452301;
+ ctx->state[1] = 0xEFCDAB89;
+ ctx->state[2] = 0x98BADCFE;
+ ctx->state[3] = 0x10325476;
+ ctx->state[4] = 0xC3D2E1F0;
ctx->count = 0;
- memcpy(ctx->state, &initstate, sizeof(initstate));
ctx->buf_len = 0;
}
@@ -63,13 +62,13 @@ static void sha1_update(struct crypto_tfm *tfm, const u8 *data,
long imd_len;
sctx = crypto_tfm_ctx(tfm);
- sctx->count += len * 8; //message bit length
+ sctx->count += len * 8; /* message bit length */
- //anything in buffer yet? -> must be completed
+ /* anything in buffer yet? -> must be completed */
if (sctx->buf_len && (sctx->buf_len + len) >= SHA1_BLOCK_SIZE) {
- //complete full block and hash
+ /* complete full block and hash */
memcpy(sctx->buffer + sctx->buf_len, data,
- SHA1_BLOCK_SIZE - sctx->buf_len);
+ SHA1_BLOCK_SIZE - sctx->buf_len);
crypt_s390_kimd(KIMD_SHA_1, sctx->state, sctx->buffer,
SHA1_BLOCK_SIZE);
data += SHA1_BLOCK_SIZE - sctx->buf_len;
@@ -77,37 +76,36 @@ static void sha1_update(struct crypto_tfm *tfm, const u8 *data,
sctx->buf_len = 0;
}
- //rest of data contains full blocks?
+ /* rest of data contains full blocks? */
imd_len = len & ~0x3ful;
- if (imd_len){
+ if (imd_len) {
crypt_s390_kimd(KIMD_SHA_1, sctx->state, data, imd_len);
data += imd_len;
len -= imd_len;
}
- //anything left? store in buffer
- if (len){
+ /* anything left? store in buffer */
+ if (len) {
memcpy(sctx->buffer + sctx->buf_len , data, len);
sctx->buf_len += len;
}
}
-static void
-pad_message(struct crypt_s390_sha1_ctx* sctx)
+static void pad_message(struct crypt_s390_sha1_ctx* sctx)
{
int index;
index = sctx->buf_len;
- sctx->buf_len = (sctx->buf_len < 56)?
- SHA1_BLOCK_SIZE:2 * SHA1_BLOCK_SIZE;
- //start pad with 1
+ sctx->buf_len = (sctx->buf_len < 56) ?
+ SHA1_BLOCK_SIZE:2 * SHA1_BLOCK_SIZE;
+ /* start pad with 1 */
sctx->buffer[index] = 0x80;
- //pad with zeros
+ /* pad with zeros */
index++;
memset(sctx->buffer + index, 0x00, sctx->buf_len - index);
- //append length
+ /* append length */
memcpy(sctx->buffer + sctx->buf_len - 8, &sctx->count,
- sizeof sctx->count);
+ sizeof sctx->count);
}
/* Add padding and return the message digest. */
@@ -115,47 +113,40 @@ static void sha1_final(struct crypto_tfm *tfm, u8 *out)
{
struct crypt_s390_sha1_ctx *sctx = crypto_tfm_ctx(tfm);
- //must perform manual padding
+ /* must perform manual padding */
pad_message(sctx);
crypt_s390_kimd(KIMD_SHA_1, sctx->state, sctx->buffer, sctx->buf_len);
- //copy digest to out
+ /* copy digest to out */
memcpy(out, sctx->state, SHA1_DIGEST_SIZE);
- /* Wipe context */
+ /* wipe context */
memset(sctx, 0, sizeof *sctx);
}
static struct crypto_alg alg = {
.cra_name = "sha1",
- .cra_driver_name = "sha1-s390",
+ .cra_driver_name= "sha1-s390",
.cra_priority = CRYPT_S390_PRIORITY,
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_blocksize = SHA1_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct crypt_s390_sha1_ctx),
.cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(alg.cra_list),
+ .cra_list = LIST_HEAD_INIT(alg.cra_list),
.cra_u = { .digest = {
.dia_digestsize = SHA1_DIGEST_SIZE,
- .dia_init = sha1_init,
- .dia_update = sha1_update,
- .dia_final = sha1_final } }
+ .dia_init = sha1_init,
+ .dia_update = sha1_update,
+ .dia_final = sha1_final } }
};
-static int
-init(void)
+static int __init init(void)
{
- int ret = -ENOSYS;
+ if (!crypt_s390_func_available(KIMD_SHA_1))
+ return -EOPNOTSUPP;
- if (crypt_s390_func_available(KIMD_SHA_1)){
- ret = crypto_register_alg(&alg);
- if (ret == 0){
- printk(KERN_INFO "crypt_s390: sha1_s390 loaded.\n");
- }
- }
- return ret;
+ return crypto_register_alg(&alg);
}
-static void __exit
-fini(void)
+static void __exit fini(void)
{
crypto_unregister_alg(&alg);
}