[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>

1 files changed, 167 insertions, 0 deletions

diff --git a/arch/s390/crypto/sha1_s390.c b/arch/s390/crypto/sha1_s390.c
new file mode 100644
index 00000000000..98c896b86dc
--- /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");