a2e5ba4fed
This updates the generic SHA-256 implementation to use the new shared SHA-256 glue code. It also implements a .finup hook crypto_sha256_finup() and exports it to other modules. The import and export() functions and the .statesize member are dropped, since the default implementation is perfectly suitable for this module. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
297 lines
10 KiB
C
297 lines
10 KiB
C
/*
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* Cryptographic API.
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*
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* SHA-256, as specified in
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* http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
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*
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* SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
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*
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* Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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* SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
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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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* 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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* any later version.
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*
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*/
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/types.h>
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#include <crypto/sha.h>
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#include <crypto/sha256_base.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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static inline u32 Ch(u32 x, u32 y, u32 z)
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{
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return z ^ (x & (y ^ z));
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}
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static inline u32 Maj(u32 x, u32 y, u32 z)
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{
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return (x & y) | (z & (x | y));
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}
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#define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22))
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#define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25))
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#define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3))
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#define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10))
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static inline void LOAD_OP(int I, u32 *W, const u8 *input)
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{
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W[I] = get_unaligned_be32((__u32 *)input + I);
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}
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static inline void BLEND_OP(int I, u32 *W)
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{
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W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16];
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}
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static void sha256_transform(u32 *state, const u8 *input)
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{
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u32 a, b, c, d, e, f, g, h, t1, t2;
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u32 W[64];
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int i;
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/* load the input */
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for (i = 0; i < 16; i++)
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LOAD_OP(i, W, input);
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/* now blend */
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for (i = 16; i < 64; i++)
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BLEND_OP(i, W);
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/* load the state into our registers */
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a=state[0]; b=state[1]; c=state[2]; d=state[3];
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e=state[4]; f=state[5]; g=state[6]; h=state[7];
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/* now iterate */
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t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0];
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t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
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t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1];
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t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
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t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2];
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t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
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t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3];
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t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
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t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4];
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t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
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t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5];
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t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
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t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6];
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t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
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t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7];
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t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
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t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8];
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t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
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t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9];
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t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
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t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10];
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t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
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t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11];
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t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
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t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12];
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t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
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t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13];
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t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
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t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14];
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t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
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t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15];
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t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
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t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16];
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t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
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t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17];
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t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
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t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18];
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t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
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t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19];
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t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
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t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20];
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t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
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t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21];
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t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
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t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22];
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t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
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t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23];
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t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
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t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24];
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t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
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t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25];
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t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
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t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26];
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t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
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t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27];
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t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
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t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28];
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t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
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t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29];
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t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
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t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30];
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t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
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t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31];
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t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
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t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32];
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t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
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t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33];
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t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
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t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34];
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t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
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t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35];
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t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
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t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36];
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t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
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t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37];
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t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
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t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38];
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t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
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t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39];
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t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
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t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40];
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t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
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t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41];
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t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
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t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42];
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t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
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t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43];
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t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
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t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44];
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t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
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t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45];
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t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
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t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46];
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t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
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t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47];
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t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
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t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48];
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t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
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t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49];
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t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
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t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50];
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t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
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t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51];
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t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
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t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52];
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t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
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t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53];
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t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
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t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54];
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t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
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t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55];
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t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
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t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56];
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t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2;
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t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57];
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t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2;
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t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58];
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t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2;
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t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59];
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t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2;
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t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60];
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t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2;
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t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61];
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t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2;
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t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62];
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t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2;
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t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63];
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t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2;
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state[0] += a; state[1] += b; state[2] += c; state[3] += d;
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state[4] += e; state[5] += f; state[6] += g; state[7] += h;
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/* clear any sensitive info... */
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a = b = c = d = e = f = g = h = t1 = t2 = 0;
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memzero_explicit(W, 64 * sizeof(u32));
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}
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static void sha256_generic_block_fn(struct sha256_state *sst, u8 const *src,
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int blocks)
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{
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while (blocks--) {
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sha256_transform(sst->state, src);
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src += SHA256_BLOCK_SIZE;
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}
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}
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int crypto_sha256_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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return sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
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}
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EXPORT_SYMBOL(crypto_sha256_update);
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static int sha256_final(struct shash_desc *desc, u8 *out)
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{
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sha256_base_do_finalize(desc, sha256_generic_block_fn);
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return sha256_base_finish(desc, out);
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}
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int crypto_sha256_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *hash)
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{
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sha256_base_do_update(desc, data, len, sha256_generic_block_fn);
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return sha256_final(desc, hash);
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}
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EXPORT_SYMBOL(crypto_sha256_finup);
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static struct shash_alg sha256_algs[2] = { {
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.digestsize = SHA256_DIGEST_SIZE,
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.init = sha256_base_init,
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.update = crypto_sha256_update,
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.final = sha256_final,
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.finup = crypto_sha256_finup,
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.descsize = sizeof(struct sha256_state),
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.base = {
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.cra_name = "sha256",
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.cra_driver_name= "sha256-generic",
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = SHA256_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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}, {
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.digestsize = SHA224_DIGEST_SIZE,
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.init = sha224_base_init,
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.update = crypto_sha256_update,
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.final = sha256_final,
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.finup = crypto_sha256_finup,
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.descsize = sizeof(struct sha256_state),
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.base = {
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.cra_name = "sha224",
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.cra_driver_name= "sha224-generic",
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = SHA224_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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} };
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static int __init sha256_generic_mod_init(void)
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{
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return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
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}
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static void __exit sha256_generic_mod_fini(void)
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{
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crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs));
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}
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module_init(sha256_generic_mod_init);
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module_exit(sha256_generic_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
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MODULE_ALIAS_CRYPTO("sha224");
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MODULE_ALIAS_CRYPTO("sha224-generic");
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MODULE_ALIAS_CRYPTO("sha256");
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MODULE_ALIAS_CRYPTO("sha256-generic");
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