Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 139 insertions, 0 deletions

diff --git a/crypto/sha1.c b/crypto/sha1.c
new file mode 100644
index 000000000000..4016f3b8ce9b
--- /dev/null
+++ b/crypto/sha1.c
@@ -0,0 +1,139 @@
+/*
+ * Cryptographic API.
+ *
+ * SHA1 Secure Hash Algorithm.
+ *
+ * Derived from cryptoapi implementation, adapted for in-place
+ * scatterlist interface.
+ *
+ * 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 <linux/cryptohash.h>
+#include <asm/scatterlist.h>
+#include <asm/byteorder.h>
+
+#define SHA1_DIGEST_SIZE        20
+#define SHA1_HMAC_BLOCK_SIZE    64
+
+struct sha1_ctx {
+        u64 count;
+        u32 state[5];
+        u8 buffer[64];
+};
+
+static void sha1_init(void *ctx)
+{
+        struct sha1_ctx *sctx = ctx;
+        static const struct sha1_ctx initstate = {
+          0,
+          { 0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0 },
+          { 0, }
+        };
+
+        *sctx = initstate;
+}
+
+static void sha1_update(void *ctx, const u8 *data, unsigned int len)
+{
+        struct sha1_ctx *sctx = ctx;
+        unsigned int i, j;
+        u32 temp[SHA_WORKSPACE_WORDS];
+
+        j = (sctx->count >> 3) & 0x3f;
+        sctx->count += len << 3;
+
+        if ((j + len) > 63) {
+                memcpy(&sctx->buffer[j], data, (i = 64-j));
+                sha_transform(sctx->state, sctx->buffer, temp);
+                for ( ; i + 63 < len; i += 64) {
+                        sha_transform(sctx->state, &data[i], temp);
+                }
+                j = 0;
+        }
+        else i = 0;
+        memset(temp, 0, sizeof(temp));
+        memcpy(&sctx->buffer[j], &data[i], len - i);
+}
+
+
+/* Add padding and return the message digest. */
+static void sha1_final(void* ctx, u8 *out)
+{
+        struct sha1_ctx *sctx = ctx;
+        u32 i, j, index, padlen;
+        u64 t;
+        u8 bits[8] = { 0, };
+        static const u8 padding[64] = { 0x80, };
+
+        t = sctx->count;
+        bits[7] = 0xff & t; t>>=8;
+        bits[6] = 0xff & t; t>>=8;
+        bits[5] = 0xff & t; t>>=8;
+        bits[4] = 0xff & t; t>>=8;
+        bits[3] = 0xff & t; t>>=8;
+        bits[2] = 0xff & t; t>>=8;
+        bits[1] = 0xff & t; t>>=8;
+        bits[0] = 0xff & t;
+
+        /* Pad out to 56 mod 64 */
+        index = (sctx->count >> 3) & 0x3f;
+        padlen = (index < 56) ? (56 - index) : ((64+56) - index);
+        sha1_update(sctx, padding, padlen);
+
+        /* Append length */
+        sha1_update(sctx, bits, sizeof bits); 
+
+        /* Store state in digest */
+        for (i = j = 0; i < 5; i++, j += 4) {
+                u32 t2 = sctx->state[i];
+                out[j+3] = t2 & 0xff; t2>>=8;
+                out[j+2] = t2 & 0xff; t2>>=8;
+                out[j+1] = t2 & 0xff; t2>>=8;
+                out[j  ] = t2 & 0xff;
+        }
+
+        /* Wipe context */
+        memset(sctx, 0, sizeof *sctx);
+}
+
+static struct crypto_alg alg = {
+        .cra_name       =       "sha1",
+        .cra_flags      =       CRYPTO_ALG_TYPE_DIGEST,
+        .cra_blocksize  =       SHA1_HMAC_BLOCK_SIZE,
+        .cra_ctxsize    =       sizeof(struct 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 init(void)
+{
+        return crypto_register_alg(&alg);
+}
+
+static void __exit fini(void)
+{
+        crypto_unregister_alg(&alg);
+}
+
+module_init(init);
+module_exit(fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA1 Secure Hash Algorithm");