[PATCH] s390: in-kernel crypto rename
Replace all references to z990 by s390 in the in-kernel crypto files in
arch/s390/crypto. The code is not specific to a particular machine (z990) but
to the s390 platform. Big diff, does nothing..
Signed-off-by: Jan Glauber <jan.glauber@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/s390/crypto/sha1_s390.c b/arch/s390/crypto/sha1_s390.c
new file mode 100644
index 0000000..98c896b
--- /dev/null
+++ b/arch/s390/crypto/sha1_s390.c
@@ -0,0 +1,167 @@
+/*
+ * Cryptographic API.
+ *
+ * s390 implementation of the SHA1 Secure Hash Algorithm.
+ *
+ * Derived from cryptoapi implementation, adapted for in-place
+ * scatterlist interface. Originally based on the public domain
+ * implementation written by Steve Reid.
+ *
+ * s390 Version:
+ * Copyright (C) 2003 IBM Deutschland GmbH, IBM Corporation
+ * Author(s): Thomas Spatzier (tspat@de.ibm.com)
+ *
+ * Derived from "crypto/sha1.c"
+ * Copyright (c) Alan Smithee.
+ * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ * Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
+ *
+ * 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/mm.h>
+#include <linux/crypto.h>
+#include <asm/scatterlist.h>
+#include <asm/byteorder.h>
+#include "crypt_s390.h"
+
+#define SHA1_DIGEST_SIZE 20
+#define SHA1_BLOCK_SIZE 64
+
+struct crypt_s390_sha1_ctx {
+ u64 count;
+ u32 state[5];
+ u32 buf_len;
+ u8 buffer[2 * SHA1_BLOCK_SIZE];
+};
+
+static void
+sha1_init(void *ctx)
+{
+ static const struct crypt_s390_sha1_ctx initstate = {
+ .state = {
+ 0x67452301,
+ 0xEFCDAB89,
+ 0x98BADCFE,
+ 0x10325476,
+ 0xC3D2E1F0
+ },
+ };
+ memcpy(ctx, &initstate, sizeof(initstate));
+}
+
+static void
+sha1_update(void *ctx, const u8 *data, unsigned int len)
+{
+ struct crypt_s390_sha1_ctx *sctx;
+ long imd_len;
+
+ sctx = ctx;
+ sctx->count += len * 8; //message bit length
+
+ //anything in buffer yet? -> must be completed
+ if (sctx->buf_len && (sctx->buf_len + len) >= SHA1_BLOCK_SIZE) {
+ //complete full block and hash
+ memcpy(sctx->buffer + sctx->buf_len, data,
+ 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;
+ len -= SHA1_BLOCK_SIZE - sctx->buf_len;
+ sctx->buf_len = 0;
+ }
+
+ //rest of data contains full blocks?
+ imd_len = len & ~0x3ful;
+ 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){
+ memcpy(sctx->buffer + sctx->buf_len , data, len);
+ sctx->buf_len += len;
+ }
+}
+
+
+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->buffer[index] = 0x80;
+ //pad with zeros
+ index++;
+ memset(sctx->buffer + index, 0x00, sctx->buf_len - index);
+ //append length
+ memcpy(sctx->buffer + sctx->buf_len - 8, &sctx->count,
+ sizeof sctx->count);
+}
+
+/* Add padding and return the message digest. */
+static void
+sha1_final(void* ctx, u8 *out)
+{
+ struct crypt_s390_sha1_ctx *sctx = ctx;
+
+ //must perform manual padding
+ pad_message(sctx);
+ crypt_s390_kimd(KIMD_SHA_1, sctx->state, sctx->buffer, sctx->buf_len);
+ //copy digest to out
+ memcpy(out, sctx->state, SHA1_DIGEST_SIZE);
+ /* Wipe context */
+ memset(sctx, 0, sizeof *sctx);
+}
+
+static struct crypto_alg alg = {
+ .cra_name = "sha1",
+ .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_u = { .digest = {
+ .dia_digestsize = SHA1_DIGEST_SIZE,
+ .dia_init = sha1_init,
+ .dia_update = sha1_update,
+ .dia_final = sha1_final } }
+};
+
+static int
+init(void)
+{
+ int ret = -ENOSYS;
+
+ 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;
+}
+
+static void __exit
+fini(void)
+{
+ crypto_unregister_alg(&alg);
+}
+
+module_init(init);
+module_exit(fini);
+
+MODULE_ALIAS("sha1");
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");