diff options
Diffstat (limited to 'crypto/sha1.c')
-rw-r--r-- | crypto/sha1.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/crypto/sha1.c b/crypto/sha1.c deleted file mode 100644 index 1bba551e5b45..000000000000 --- a/crypto/sha1.c +++ /dev/null @@ -1,142 +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 <linux/types.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(struct crypto_tfm *tfm) -{ - struct sha1_ctx *sctx = crypto_tfm_ctx(tfm); - static const struct sha1_ctx initstate = { - 0, - { 0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0 }, - { 0, } - }; - - *sctx = initstate; -} - -static void sha1_update(struct crypto_tfm *tfm, const u8 *data, - unsigned int len) -{ - struct sha1_ctx *sctx = crypto_tfm_ctx(tfm); - unsigned int partial, done; - const u8 *src; - - partial = sctx->count & 0x3f; - sctx->count += len; - done = 0; - src = data; - - if ((partial + len) > 63) { - u32 temp[SHA_WORKSPACE_WORDS]; - - if (partial) { - done = -partial; - memcpy(sctx->buffer + partial, data, done + 64); - src = sctx->buffer; - } - - do { - sha_transform(sctx->state, src, temp); - done += 64; - src = data + done; - } while (done + 63 < len); - - memset(temp, 0, sizeof(temp)); - partial = 0; - } - memcpy(sctx->buffer + partial, src, len - done); -} - - -/* Add padding and return the message digest. */ -static void sha1_final(struct crypto_tfm *tfm, u8 *out) -{ - struct sha1_ctx *sctx = crypto_tfm_ctx(tfm); - __be32 *dst = (__be32 *)out; - u32 i, index, padlen; - __be64 bits; - static const u8 padding[64] = { 0x80, }; - - bits = cpu_to_be64(sctx->count << 3); - - /* Pad out to 56 mod 64 */ - index = sctx->count & 0x3f; - padlen = (index < 56) ? (56 - index) : ((64+56) - index); - sha1_update(tfm, padding, padlen); - - /* Append length */ - sha1_update(tfm, (const u8 *)&bits, sizeof(bits)); - - /* Store state in digest */ - for (i = 0; i < 5; i++) - dst[i] = cpu_to_be32(sctx->state[i]); - - /* Wipe context */ - memset(sctx, 0, sizeof *sctx); -} - -static struct crypto_alg alg = { - .cra_name = "sha1", - .cra_driver_name= "sha1-generic", - .cra_flags = CRYPTO_ALG_TYPE_DIGEST, - .cra_blocksize = SHA1_HMAC_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct sha1_ctx), - .cra_module = THIS_MODULE, - .cra_alignmask = 3, - .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"); - -MODULE_ALIAS("sha1-generic"); |