/*
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/*
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* Cryptographic API.
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* Cryptographic API.
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*
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*
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* MD5 Message Digest Algorithm (RFC1321).
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* MD5 Message Digest Algorithm (RFC1321).
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*
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*
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* Derived from cryptoapi implementation, originally based on the
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* Derived from cryptoapi implementation, originally based on the
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* public domain implementation written by Colin Plumb in 1993.
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* public domain implementation written by Colin Plumb in 1993.
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*
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*
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* Copyright (c) Cryptoapi developers.
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* Copyright (c) Cryptoapi developers.
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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*
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*
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* This program is free software; you can redistribute it and/or modify it
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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* any later version.
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*
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*
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*/
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*/
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#include <linux/init.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/crypto.h>
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#include <linux/crypto.h>
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#include <asm/byteorder.h>
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#include <asm/byteorder.h>
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|
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#define MD5_DIGEST_SIZE 16
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#define MD5_DIGEST_SIZE 16
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#define MD5_HMAC_BLOCK_SIZE 64
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#define MD5_HMAC_BLOCK_SIZE 64
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#define MD5_BLOCK_WORDS 16
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#define MD5_BLOCK_WORDS 16
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#define MD5_HASH_WORDS 4
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#define MD5_HASH_WORDS 4
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|
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#define F1(x, y, z) (z ^ (x & (y ^ z)))
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#define F1(x, y, z) (z ^ (x & (y ^ z)))
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#define F2(x, y, z) F1(z, x, y)
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#define F2(x, y, z) F1(z, x, y)
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#define F3(x, y, z) (x ^ y ^ z)
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#define F3(x, y, z) (x ^ y ^ z)
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#define F4(x, y, z) (y ^ (x | ~z))
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#define F4(x, y, z) (y ^ (x | ~z))
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|
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#define MD5STEP(f, w, x, y, z, in, s) \
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#define MD5STEP(f, w, x, y, z, in, s) \
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(w += f(x, y, z) + in, w = (w<<s | w>>(32-s)) + x)
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(w += f(x, y, z) + in, w = (w<<s | w>>(32-s)) + x)
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|
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struct md5_ctx {
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struct md5_ctx {
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u32 hash[MD5_HASH_WORDS];
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u32 hash[MD5_HASH_WORDS];
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u32 block[MD5_BLOCK_WORDS];
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u32 block[MD5_BLOCK_WORDS];
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u64 byte_count;
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u64 byte_count;
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};
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};
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static void md5_transform(u32 *hash, u32 const *in)
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static void md5_transform(u32 *hash, u32 const *in)
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{
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{
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u32 a, b, c, d;
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u32 a, b, c, d;
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|
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a = hash[0];
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a = hash[0];
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b = hash[1];
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b = hash[1];
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c = hash[2];
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c = hash[2];
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d = hash[3];
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d = hash[3];
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MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
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MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
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MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
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MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
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MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
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MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
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MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
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MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
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MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
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MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
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MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
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MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
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MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
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MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
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MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
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MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
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MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
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MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
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MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
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MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
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MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
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MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
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MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
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MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
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MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
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MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
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MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
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MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
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MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
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MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
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MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
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MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
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|
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MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
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MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
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MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
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MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
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MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
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MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
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MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
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MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
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MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
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MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
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MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
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MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
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MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
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MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
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MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
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MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
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MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
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MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
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MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
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MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
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MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
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MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
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MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
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MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
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MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
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MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
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MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
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MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
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MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
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MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
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MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
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MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
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|
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MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
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MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
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MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
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MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
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MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
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MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
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MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
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MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
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MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
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MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
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MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
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MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
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MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
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MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
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MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
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MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
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MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
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MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
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MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
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MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
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MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
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MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
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MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
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MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
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MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
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MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
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MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
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MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
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MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
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MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
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MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
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MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
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|
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MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
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MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
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MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
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MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
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MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
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MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
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MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
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MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
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MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
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MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
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MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
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MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
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MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
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MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
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MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
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MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
|
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
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MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
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MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
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MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
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MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
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MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
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MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
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MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
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MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
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MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
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MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
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MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
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MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
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MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
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MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
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MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
|
|
|
hash[0] += a;
|
hash[0] += a;
|
hash[1] += b;
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hash[1] += b;
|
hash[2] += c;
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hash[2] += c;
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hash[3] += d;
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hash[3] += d;
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}
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}
|
|
|
/* XXX: this stuff can be optimized */
|
/* XXX: this stuff can be optimized */
|
static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
|
static inline void le32_to_cpu_array(u32 *buf, unsigned int words)
|
{
|
{
|
while (words--) {
|
while (words--) {
|
__le32_to_cpus(buf);
|
__le32_to_cpus(buf);
|
buf++;
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buf++;
|
}
|
}
|
}
|
}
|
|
|
static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
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static inline void cpu_to_le32_array(u32 *buf, unsigned int words)
|
{
|
{
|
while (words--) {
|
while (words--) {
|
__cpu_to_le32s(buf);
|
__cpu_to_le32s(buf);
|
buf++;
|
buf++;
|
}
|
}
|
}
|
}
|
|
|
static inline void md5_transform_helper(struct md5_ctx *ctx)
|
static inline void md5_transform_helper(struct md5_ctx *ctx)
|
{
|
{
|
le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(u32));
|
le32_to_cpu_array(ctx->block, sizeof(ctx->block) / sizeof(u32));
|
md5_transform(ctx->hash, ctx->block);
|
md5_transform(ctx->hash, ctx->block);
|
}
|
}
|
|
|
static void md5_init(void *ctx)
|
static void md5_init(void *ctx)
|
{
|
{
|
struct md5_ctx *mctx = ctx;
|
struct md5_ctx *mctx = ctx;
|
|
|
mctx->hash[0] = 0x67452301;
|
mctx->hash[0] = 0x67452301;
|
mctx->hash[1] = 0xefcdab89;
|
mctx->hash[1] = 0xefcdab89;
|
mctx->hash[2] = 0x98badcfe;
|
mctx->hash[2] = 0x98badcfe;
|
mctx->hash[3] = 0x10325476;
|
mctx->hash[3] = 0x10325476;
|
mctx->byte_count = 0;
|
mctx->byte_count = 0;
|
}
|
}
|
|
|
static void md5_update(void *ctx, const u8 *data, unsigned int len)
|
static void md5_update(void *ctx, const u8 *data, unsigned int len)
|
{
|
{
|
struct md5_ctx *mctx = ctx;
|
struct md5_ctx *mctx = ctx;
|
const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
|
const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f);
|
|
|
mctx->byte_count += len;
|
mctx->byte_count += len;
|
|
|
if (avail > len) {
|
if (avail > len) {
|
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
|
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
|
data, len);
|
data, len);
|
return;
|
return;
|
}
|
}
|
|
|
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
|
memcpy((char *)mctx->block + (sizeof(mctx->block) - avail),
|
data, avail);
|
data, avail);
|
|
|
md5_transform_helper(mctx);
|
md5_transform_helper(mctx);
|
data += avail;
|
data += avail;
|
len -= avail;
|
len -= avail;
|
|
|
while (len >= sizeof(mctx->block)) {
|
while (len >= sizeof(mctx->block)) {
|
memcpy(mctx->block, data, sizeof(mctx->block));
|
memcpy(mctx->block, data, sizeof(mctx->block));
|
md5_transform_helper(mctx);
|
md5_transform_helper(mctx);
|
data += sizeof(mctx->block);
|
data += sizeof(mctx->block);
|
len -= sizeof(mctx->block);
|
len -= sizeof(mctx->block);
|
}
|
}
|
|
|
memcpy(mctx->block, data, len);
|
memcpy(mctx->block, data, len);
|
}
|
}
|
|
|
static void md5_final(void *ctx, u8 *out)
|
static void md5_final(void *ctx, u8 *out)
|
{
|
{
|
struct md5_ctx *mctx = ctx;
|
struct md5_ctx *mctx = ctx;
|
const unsigned int offset = mctx->byte_count & 0x3f;
|
const unsigned int offset = mctx->byte_count & 0x3f;
|
char *p = (char *)mctx->block + offset;
|
char *p = (char *)mctx->block + offset;
|
int padding = 56 - (offset + 1);
|
int padding = 56 - (offset + 1);
|
|
|
*p++ = 0x80;
|
*p++ = 0x80;
|
if (padding < 0) {
|
if (padding < 0) {
|
memset(p, 0x00, padding + sizeof (u64));
|
memset(p, 0x00, padding + sizeof (u64));
|
md5_transform_helper(mctx);
|
md5_transform_helper(mctx);
|
p = (char *)mctx->block;
|
p = (char *)mctx->block;
|
padding = 56;
|
padding = 56;
|
}
|
}
|
|
|
memset(p, 0, padding);
|
memset(p, 0, padding);
|
mctx->block[14] = mctx->byte_count << 3;
|
mctx->block[14] = mctx->byte_count << 3;
|
mctx->block[15] = mctx->byte_count >> 29;
|
mctx->block[15] = mctx->byte_count >> 29;
|
le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
|
le32_to_cpu_array(mctx->block, (sizeof(mctx->block) -
|
sizeof(u64)) / sizeof(u32));
|
sizeof(u64)) / sizeof(u32));
|
md5_transform(mctx->hash, mctx->block);
|
md5_transform(mctx->hash, mctx->block);
|
cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(u32));
|
cpu_to_le32_array(mctx->hash, sizeof(mctx->hash) / sizeof(u32));
|
memcpy(out, mctx->hash, sizeof(mctx->hash));
|
memcpy(out, mctx->hash, sizeof(mctx->hash));
|
memset(mctx, 0, sizeof(*mctx));
|
memset(mctx, 0, sizeof(*mctx));
|
}
|
}
|
|
|
static struct crypto_alg alg = {
|
static struct crypto_alg alg = {
|
.cra_name = "md5",
|
.cra_name = "md5",
|
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
|
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
|
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
|
.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
|
.cra_ctxsize = sizeof(struct md5_ctx),
|
.cra_ctxsize = sizeof(struct md5_ctx),
|
.cra_module = THIS_MODULE,
|
.cra_module = THIS_MODULE,
|
.cra_list = LIST_HEAD_INIT(alg.cra_list),
|
.cra_list = LIST_HEAD_INIT(alg.cra_list),
|
.cra_u = { .digest = {
|
.cra_u = { .digest = {
|
.dia_digestsize = MD5_DIGEST_SIZE,
|
.dia_digestsize = MD5_DIGEST_SIZE,
|
.dia_init = md5_init,
|
.dia_init = md5_init,
|
.dia_update = md5_update,
|
.dia_update = md5_update,
|
.dia_final = md5_final } }
|
.dia_final = md5_final } }
|
};
|
};
|
|
|
static int __init init(void)
|
static int __init init(void)
|
{
|
{
|
return crypto_register_alg(&alg);
|
return crypto_register_alg(&alg);
|
}
|
}
|
|
|
static void __exit fini(void)
|
static void __exit fini(void)
|
{
|
{
|
crypto_unregister_alg(&alg);
|
crypto_unregister_alg(&alg);
|
}
|
}
|
|
|
module_init(init);
|
module_init(init);
|
module_exit(fini);
|
module_exit(fini);
|
|
|
MODULE_LICENSE("GPL");
|
MODULE_LICENSE("GPL");
|
MODULE_DESCRIPTION("MD5 Message Digest Algorithm");
|
MODULE_DESCRIPTION("MD5 Message Digest Algorithm");
|
|
|
