diff options
Diffstat (limited to 'crypto/sha1.c')
| -rw-r--r-- | crypto/sha1.c | 139 |
1 files changed, 0 insertions, 139 deletions
diff --git a/crypto/sha1.c b/crypto/sha1.c deleted file mode 100644 index 4016f3b8ce9..00000000000 --- a/crypto/sha1.c +++ /dev/null @@ -1,139 +0,0 @@ -/* - * 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"); |
