1ad5d2789SSebastian Siewior /* 2ad5d2789SSebastian Siewior * Cryptographic API. 3ad5d2789SSebastian Siewior * 4ad5d2789SSebastian Siewior * SHA-256, as specified in 58c882f64SAdrian-Ken Rueegsegger * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf 6ad5d2789SSebastian Siewior * 7ad5d2789SSebastian Siewior * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>. 8ad5d2789SSebastian Siewior * 9ad5d2789SSebastian Siewior * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> 10ad5d2789SSebastian Siewior * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> 11ad5d2789SSebastian Siewior * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 12cd12fb90SJonathan Lynch * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> 13ad5d2789SSebastian Siewior * 14ad5d2789SSebastian Siewior * This program is free software; you can redistribute it and/or modify it 15ad5d2789SSebastian Siewior * under the terms of the GNU General Public License as published by the Free 16ad5d2789SSebastian Siewior * Software Foundation; either version 2 of the License, or (at your option) 17ad5d2789SSebastian Siewior * any later version. 18ad5d2789SSebastian Siewior * 19ad5d2789SSebastian Siewior */ 2050e109b5SAdrian-Ken Rueegsegger #include <crypto/internal/hash.h> 21ad5d2789SSebastian Siewior #include <linux/init.h> 22ad5d2789SSebastian Siewior #include <linux/module.h> 23ad5d2789SSebastian Siewior #include <linux/mm.h> 24ad5d2789SSebastian Siewior #include <linux/types.h> 255265eeb2SJan Glauber #include <crypto/sha.h> 26ad5d2789SSebastian Siewior #include <asm/byteorder.h> 27ad5d2789SSebastian Siewior 28ad5d2789SSebastian Siewior static inline u32 Ch(u32 x, u32 y, u32 z) 29ad5d2789SSebastian Siewior { 30ad5d2789SSebastian Siewior return z ^ (x & (y ^ z)); 31ad5d2789SSebastian Siewior } 32ad5d2789SSebastian Siewior 33ad5d2789SSebastian Siewior static inline u32 Maj(u32 x, u32 y, u32 z) 34ad5d2789SSebastian Siewior { 35ad5d2789SSebastian Siewior return (x & y) | (z & (x | y)); 36ad5d2789SSebastian Siewior } 37ad5d2789SSebastian Siewior 38ad5d2789SSebastian Siewior #define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22)) 39ad5d2789SSebastian Siewior #define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25)) 40ad5d2789SSebastian Siewior #define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3)) 41ad5d2789SSebastian Siewior #define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10)) 42ad5d2789SSebastian Siewior 43ad5d2789SSebastian Siewior static inline void LOAD_OP(int I, u32 *W, const u8 *input) 44ad5d2789SSebastian Siewior { 45ad5d2789SSebastian Siewior W[I] = __be32_to_cpu( ((__be32*)(input))[I] ); 46ad5d2789SSebastian Siewior } 47ad5d2789SSebastian Siewior 48ad5d2789SSebastian Siewior static inline void BLEND_OP(int I, u32 *W) 49ad5d2789SSebastian Siewior { 50ad5d2789SSebastian Siewior W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; 51ad5d2789SSebastian Siewior } 52ad5d2789SSebastian Siewior 53ad5d2789SSebastian Siewior static void sha256_transform(u32 *state, const u8 *input) 54ad5d2789SSebastian Siewior { 55ad5d2789SSebastian Siewior u32 a, b, c, d, e, f, g, h, t1, t2; 56ad5d2789SSebastian Siewior u32 W[64]; 57ad5d2789SSebastian Siewior int i; 58ad5d2789SSebastian Siewior 59ad5d2789SSebastian Siewior /* load the input */ 60ad5d2789SSebastian Siewior for (i = 0; i < 16; i++) 61ad5d2789SSebastian Siewior LOAD_OP(i, W, input); 62ad5d2789SSebastian Siewior 63ad5d2789SSebastian Siewior /* now blend */ 64ad5d2789SSebastian Siewior for (i = 16; i < 64; i++) 65ad5d2789SSebastian Siewior BLEND_OP(i, W); 66ad5d2789SSebastian Siewior 67ad5d2789SSebastian Siewior /* load the state into our registers */ 68ad5d2789SSebastian Siewior a=state[0]; b=state[1]; c=state[2]; d=state[3]; 69ad5d2789SSebastian Siewior e=state[4]; f=state[5]; g=state[6]; h=state[7]; 70ad5d2789SSebastian Siewior 71ad5d2789SSebastian Siewior /* now iterate */ 72ad5d2789SSebastian Siewior t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0]; 73ad5d2789SSebastian Siewior t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 74ad5d2789SSebastian Siewior t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1]; 75ad5d2789SSebastian Siewior t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 76ad5d2789SSebastian Siewior t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2]; 77ad5d2789SSebastian Siewior t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 78ad5d2789SSebastian Siewior t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3]; 79ad5d2789SSebastian Siewior t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 80ad5d2789SSebastian Siewior t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4]; 81ad5d2789SSebastian Siewior t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 82ad5d2789SSebastian Siewior t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5]; 83ad5d2789SSebastian Siewior t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 84ad5d2789SSebastian Siewior t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6]; 85ad5d2789SSebastian Siewior t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 86ad5d2789SSebastian Siewior t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7]; 87ad5d2789SSebastian Siewior t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 88ad5d2789SSebastian Siewior 89ad5d2789SSebastian Siewior t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8]; 90ad5d2789SSebastian Siewior t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 91ad5d2789SSebastian Siewior t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9]; 92ad5d2789SSebastian Siewior t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 93ad5d2789SSebastian Siewior t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10]; 94ad5d2789SSebastian Siewior t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 95ad5d2789SSebastian Siewior t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11]; 96ad5d2789SSebastian Siewior t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 97ad5d2789SSebastian Siewior t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12]; 98ad5d2789SSebastian Siewior t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 99ad5d2789SSebastian Siewior t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13]; 100ad5d2789SSebastian Siewior t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 101ad5d2789SSebastian Siewior t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14]; 102ad5d2789SSebastian Siewior t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 103ad5d2789SSebastian Siewior t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15]; 104ad5d2789SSebastian Siewior t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 105ad5d2789SSebastian Siewior 106ad5d2789SSebastian Siewior t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16]; 107ad5d2789SSebastian Siewior t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 108ad5d2789SSebastian Siewior t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17]; 109ad5d2789SSebastian Siewior t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 110ad5d2789SSebastian Siewior t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18]; 111ad5d2789SSebastian Siewior t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 112ad5d2789SSebastian Siewior t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19]; 113ad5d2789SSebastian Siewior t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 114ad5d2789SSebastian Siewior t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20]; 115ad5d2789SSebastian Siewior t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 116ad5d2789SSebastian Siewior t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21]; 117ad5d2789SSebastian Siewior t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 118ad5d2789SSebastian Siewior t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22]; 119ad5d2789SSebastian Siewior t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 120ad5d2789SSebastian Siewior t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23]; 121ad5d2789SSebastian Siewior t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 122ad5d2789SSebastian Siewior 123ad5d2789SSebastian Siewior t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24]; 124ad5d2789SSebastian Siewior t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 125ad5d2789SSebastian Siewior t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25]; 126ad5d2789SSebastian Siewior t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 127ad5d2789SSebastian Siewior t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26]; 128ad5d2789SSebastian Siewior t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 129ad5d2789SSebastian Siewior t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27]; 130ad5d2789SSebastian Siewior t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 131ad5d2789SSebastian Siewior t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28]; 132ad5d2789SSebastian Siewior t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 133ad5d2789SSebastian Siewior t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29]; 134ad5d2789SSebastian Siewior t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 135ad5d2789SSebastian Siewior t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30]; 136ad5d2789SSebastian Siewior t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 137ad5d2789SSebastian Siewior t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31]; 138ad5d2789SSebastian Siewior t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 139ad5d2789SSebastian Siewior 140ad5d2789SSebastian Siewior t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32]; 141ad5d2789SSebastian Siewior t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 142ad5d2789SSebastian Siewior t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33]; 143ad5d2789SSebastian Siewior t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 144ad5d2789SSebastian Siewior t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34]; 145ad5d2789SSebastian Siewior t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 146ad5d2789SSebastian Siewior t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35]; 147ad5d2789SSebastian Siewior t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 148ad5d2789SSebastian Siewior t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36]; 149ad5d2789SSebastian Siewior t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 150ad5d2789SSebastian Siewior t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37]; 151ad5d2789SSebastian Siewior t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 152ad5d2789SSebastian Siewior t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38]; 153ad5d2789SSebastian Siewior t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 154ad5d2789SSebastian Siewior t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39]; 155ad5d2789SSebastian Siewior t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 156ad5d2789SSebastian Siewior 157ad5d2789SSebastian Siewior t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40]; 158ad5d2789SSebastian Siewior t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 159ad5d2789SSebastian Siewior t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41]; 160ad5d2789SSebastian Siewior t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 161ad5d2789SSebastian Siewior t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42]; 162ad5d2789SSebastian Siewior t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 163ad5d2789SSebastian Siewior t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43]; 164ad5d2789SSebastian Siewior t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 165ad5d2789SSebastian Siewior t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44]; 166ad5d2789SSebastian Siewior t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 167ad5d2789SSebastian Siewior t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45]; 168ad5d2789SSebastian Siewior t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 169ad5d2789SSebastian Siewior t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46]; 170ad5d2789SSebastian Siewior t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 171ad5d2789SSebastian Siewior t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47]; 172ad5d2789SSebastian Siewior t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 173ad5d2789SSebastian Siewior 174ad5d2789SSebastian Siewior t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48]; 175ad5d2789SSebastian Siewior t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 176ad5d2789SSebastian Siewior t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49]; 177ad5d2789SSebastian Siewior t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 178ad5d2789SSebastian Siewior t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50]; 179ad5d2789SSebastian Siewior t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 180ad5d2789SSebastian Siewior t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51]; 181ad5d2789SSebastian Siewior t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 182ad5d2789SSebastian Siewior t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52]; 183ad5d2789SSebastian Siewior t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 184ad5d2789SSebastian Siewior t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53]; 185ad5d2789SSebastian Siewior t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 186ad5d2789SSebastian Siewior t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54]; 187ad5d2789SSebastian Siewior t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 188ad5d2789SSebastian Siewior t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55]; 189ad5d2789SSebastian Siewior t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 190ad5d2789SSebastian Siewior 191ad5d2789SSebastian Siewior t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56]; 192ad5d2789SSebastian Siewior t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; 193ad5d2789SSebastian Siewior t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57]; 194ad5d2789SSebastian Siewior t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; 195ad5d2789SSebastian Siewior t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58]; 196ad5d2789SSebastian Siewior t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; 197ad5d2789SSebastian Siewior t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59]; 198ad5d2789SSebastian Siewior t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; 199ad5d2789SSebastian Siewior t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60]; 200ad5d2789SSebastian Siewior t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; 201ad5d2789SSebastian Siewior t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61]; 202ad5d2789SSebastian Siewior t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; 203ad5d2789SSebastian Siewior t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62]; 204ad5d2789SSebastian Siewior t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; 205ad5d2789SSebastian Siewior t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63]; 206ad5d2789SSebastian Siewior t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; 207ad5d2789SSebastian Siewior 208ad5d2789SSebastian Siewior state[0] += a; state[1] += b; state[2] += c; state[3] += d; 209ad5d2789SSebastian Siewior state[4] += e; state[5] += f; state[6] += g; state[7] += h; 210ad5d2789SSebastian Siewior 211ad5d2789SSebastian Siewior /* clear any sensitive info... */ 212ad5d2789SSebastian Siewior a = b = c = d = e = f = g = h = t1 = t2 = 0; 213ad5d2789SSebastian Siewior memset(W, 0, 64 * sizeof(u32)); 214ad5d2789SSebastian Siewior } 215ad5d2789SSebastian Siewior 216cd12fb90SJonathan Lynch 21750e109b5SAdrian-Ken Rueegsegger static int sha224_init(struct shash_desc *desc) 218cd12fb90SJonathan Lynch { 2199b2fda7bSHerbert Xu struct sha256_state *sctx = shash_desc_ctx(desc); 220cd12fb90SJonathan Lynch sctx->state[0] = SHA224_H0; 221cd12fb90SJonathan Lynch sctx->state[1] = SHA224_H1; 222cd12fb90SJonathan Lynch sctx->state[2] = SHA224_H2; 223cd12fb90SJonathan Lynch sctx->state[3] = SHA224_H3; 224cd12fb90SJonathan Lynch sctx->state[4] = SHA224_H4; 225cd12fb90SJonathan Lynch sctx->state[5] = SHA224_H5; 226cd12fb90SJonathan Lynch sctx->state[6] = SHA224_H6; 227cd12fb90SJonathan Lynch sctx->state[7] = SHA224_H7; 2283d4d277cSHerbert Xu sctx->count = 0; 22950e109b5SAdrian-Ken Rueegsegger 23050e109b5SAdrian-Ken Rueegsegger return 0; 231cd12fb90SJonathan Lynch } 232cd12fb90SJonathan Lynch 23350e109b5SAdrian-Ken Rueegsegger static int sha256_init(struct shash_desc *desc) 234ad5d2789SSebastian Siewior { 2359b2fda7bSHerbert Xu struct sha256_state *sctx = shash_desc_ctx(desc); 2365265eeb2SJan Glauber sctx->state[0] = SHA256_H0; 2375265eeb2SJan Glauber sctx->state[1] = SHA256_H1; 2385265eeb2SJan Glauber sctx->state[2] = SHA256_H2; 2395265eeb2SJan Glauber sctx->state[3] = SHA256_H3; 2405265eeb2SJan Glauber sctx->state[4] = SHA256_H4; 2415265eeb2SJan Glauber sctx->state[5] = SHA256_H5; 2425265eeb2SJan Glauber sctx->state[6] = SHA256_H6; 2435265eeb2SJan Glauber sctx->state[7] = SHA256_H7; 2443d4d277cSHerbert Xu sctx->count = 0; 24550e109b5SAdrian-Ken Rueegsegger 24650e109b5SAdrian-Ken Rueegsegger return 0; 247ad5d2789SSebastian Siewior } 248ad5d2789SSebastian Siewior 24950e109b5SAdrian-Ken Rueegsegger static int sha256_update(struct shash_desc *desc, const u8 *data, 250ad5d2789SSebastian Siewior unsigned int len) 251ad5d2789SSebastian Siewior { 2529b2fda7bSHerbert Xu struct sha256_state *sctx = shash_desc_ctx(desc); 2533d4d277cSHerbert Xu unsigned int partial, done; 2543d4d277cSHerbert Xu const u8 *src; 255ad5d2789SSebastian Siewior 2563d4d277cSHerbert Xu partial = sctx->count & 0x3f; 2573d4d277cSHerbert Xu sctx->count += len; 2583d4d277cSHerbert Xu done = 0; 2593d4d277cSHerbert Xu src = data; 260ad5d2789SSebastian Siewior 2613d4d277cSHerbert Xu if ((partial + len) > 63) { 2623d4d277cSHerbert Xu if (partial) { 2633d4d277cSHerbert Xu done = -partial; 2643d4d277cSHerbert Xu memcpy(sctx->buf + partial, data, done + 64); 2653d4d277cSHerbert Xu src = sctx->buf; 266ad5d2789SSebastian Siewior } 267ad5d2789SSebastian Siewior 2683d4d277cSHerbert Xu do { 2693d4d277cSHerbert Xu sha256_transform(sctx->state, src); 2703d4d277cSHerbert Xu done += 64; 2713d4d277cSHerbert Xu src = data + done; 2723d4d277cSHerbert Xu } while (done + 63 < len); 273ad5d2789SSebastian Siewior 2743d4d277cSHerbert Xu partial = 0; 275ad5d2789SSebastian Siewior } 2763d4d277cSHerbert Xu memcpy(sctx->buf + partial, src, len - done); 27750e109b5SAdrian-Ken Rueegsegger 27850e109b5SAdrian-Ken Rueegsegger return 0; 279ad5d2789SSebastian Siewior } 280ad5d2789SSebastian Siewior 28150e109b5SAdrian-Ken Rueegsegger static int sha256_final(struct shash_desc *desc, u8 *out) 282ad5d2789SSebastian Siewior { 2839b2fda7bSHerbert Xu struct sha256_state *sctx = shash_desc_ctx(desc); 284ad5d2789SSebastian Siewior __be32 *dst = (__be32 *)out; 2853d4d277cSHerbert Xu __be64 bits; 286ad5d2789SSebastian Siewior unsigned int index, pad_len; 287ad5d2789SSebastian Siewior int i; 288ad5d2789SSebastian Siewior static const u8 padding[64] = { 0x80, }; 289ad5d2789SSebastian Siewior 290ad5d2789SSebastian Siewior /* Save number of bits */ 2913d4d277cSHerbert Xu bits = cpu_to_be64(sctx->count << 3); 292ad5d2789SSebastian Siewior 293ad5d2789SSebastian Siewior /* Pad out to 56 mod 64. */ 2943d4d277cSHerbert Xu index = sctx->count & 0x3f; 295ad5d2789SSebastian Siewior pad_len = (index < 56) ? (56 - index) : ((64+56) - index); 29650e109b5SAdrian-Ken Rueegsegger sha256_update(desc, padding, pad_len); 297ad5d2789SSebastian Siewior 298ad5d2789SSebastian Siewior /* Append length (before padding) */ 2993d4d277cSHerbert Xu sha256_update(desc, (const u8 *)&bits, sizeof(bits)); 300ad5d2789SSebastian Siewior 301ad5d2789SSebastian Siewior /* Store state in digest */ 302ad5d2789SSebastian Siewior for (i = 0; i < 8; i++) 303ad5d2789SSebastian Siewior dst[i] = cpu_to_be32(sctx->state[i]); 304ad5d2789SSebastian Siewior 305ad5d2789SSebastian Siewior /* Zeroize sensitive information. */ 306ad5d2789SSebastian Siewior memset(sctx, 0, sizeof(*sctx)); 30750e109b5SAdrian-Ken Rueegsegger 30850e109b5SAdrian-Ken Rueegsegger return 0; 309ad5d2789SSebastian Siewior } 310ad5d2789SSebastian Siewior 31150e109b5SAdrian-Ken Rueegsegger static int sha224_final(struct shash_desc *desc, u8 *hash) 312cd12fb90SJonathan Lynch { 313cd12fb90SJonathan Lynch u8 D[SHA256_DIGEST_SIZE]; 314ad5d2789SSebastian Siewior 31550e109b5SAdrian-Ken Rueegsegger sha256_final(desc, D); 316cd12fb90SJonathan Lynch 317cd12fb90SJonathan Lynch memcpy(hash, D, SHA224_DIGEST_SIZE); 318cd12fb90SJonathan Lynch memset(D, 0, SHA256_DIGEST_SIZE); 31950e109b5SAdrian-Ken Rueegsegger 32050e109b5SAdrian-Ken Rueegsegger return 0; 321cd12fb90SJonathan Lynch } 322cd12fb90SJonathan Lynch 3239b2fda7bSHerbert Xu static int sha256_export(struct shash_desc *desc, void *out) 3249b2fda7bSHerbert Xu { 3259b2fda7bSHerbert Xu struct sha256_state *sctx = shash_desc_ctx(desc); 3269b2fda7bSHerbert Xu 3279b2fda7bSHerbert Xu memcpy(out, sctx, sizeof(*sctx)); 3289b2fda7bSHerbert Xu return 0; 3299b2fda7bSHerbert Xu } 3309b2fda7bSHerbert Xu 3319b2fda7bSHerbert Xu static int sha256_import(struct shash_desc *desc, const void *in) 3329b2fda7bSHerbert Xu { 3339b2fda7bSHerbert Xu struct sha256_state *sctx = shash_desc_ctx(desc); 3349b2fda7bSHerbert Xu 3359b2fda7bSHerbert Xu memcpy(sctx, in, sizeof(*sctx)); 3369b2fda7bSHerbert Xu return 0; 3379b2fda7bSHerbert Xu } 3389b2fda7bSHerbert Xu 33950e109b5SAdrian-Ken Rueegsegger static struct shash_alg sha256 = { 34050e109b5SAdrian-Ken Rueegsegger .digestsize = SHA256_DIGEST_SIZE, 34150e109b5SAdrian-Ken Rueegsegger .init = sha256_init, 34250e109b5SAdrian-Ken Rueegsegger .update = sha256_update, 34350e109b5SAdrian-Ken Rueegsegger .final = sha256_final, 3449b2fda7bSHerbert Xu .export = sha256_export, 3459b2fda7bSHerbert Xu .import = sha256_import, 3469b2fda7bSHerbert Xu .descsize = sizeof(struct sha256_state), 3479b2fda7bSHerbert Xu .statesize = sizeof(struct sha256_state), 34850e109b5SAdrian-Ken Rueegsegger .base = { 349ad5d2789SSebastian Siewior .cra_name = "sha256", 350ad5d2789SSebastian Siewior .cra_driver_name= "sha256-generic", 35150e109b5SAdrian-Ken Rueegsegger .cra_flags = CRYPTO_ALG_TYPE_SHASH, 3525265eeb2SJan Glauber .cra_blocksize = SHA256_BLOCK_SIZE, 353ad5d2789SSebastian Siewior .cra_module = THIS_MODULE, 35450e109b5SAdrian-Ken Rueegsegger } 355ad5d2789SSebastian Siewior }; 356ad5d2789SSebastian Siewior 35750e109b5SAdrian-Ken Rueegsegger static struct shash_alg sha224 = { 35850e109b5SAdrian-Ken Rueegsegger .digestsize = SHA224_DIGEST_SIZE, 35950e109b5SAdrian-Ken Rueegsegger .init = sha224_init, 36050e109b5SAdrian-Ken Rueegsegger .update = sha256_update, 36150e109b5SAdrian-Ken Rueegsegger .final = sha224_final, 3629b2fda7bSHerbert Xu .descsize = sizeof(struct sha256_state), 36350e109b5SAdrian-Ken Rueegsegger .base = { 364cd12fb90SJonathan Lynch .cra_name = "sha224", 365cd12fb90SJonathan Lynch .cra_driver_name= "sha224-generic", 36650e109b5SAdrian-Ken Rueegsegger .cra_flags = CRYPTO_ALG_TYPE_SHASH, 367cd12fb90SJonathan Lynch .cra_blocksize = SHA224_BLOCK_SIZE, 368cd12fb90SJonathan Lynch .cra_module = THIS_MODULE, 36950e109b5SAdrian-Ken Rueegsegger } 370cd12fb90SJonathan Lynch }; 371cd12fb90SJonathan Lynch 3723af5b90bSKamalesh Babulal static int __init sha256_generic_mod_init(void) 373ad5d2789SSebastian Siewior { 374cd12fb90SJonathan Lynch int ret = 0; 375cd12fb90SJonathan Lynch 37650e109b5SAdrian-Ken Rueegsegger ret = crypto_register_shash(&sha224); 377cd12fb90SJonathan Lynch 378cd12fb90SJonathan Lynch if (ret < 0) 379cd12fb90SJonathan Lynch return ret; 380cd12fb90SJonathan Lynch 38150e109b5SAdrian-Ken Rueegsegger ret = crypto_register_shash(&sha256); 382cd12fb90SJonathan Lynch 383cd12fb90SJonathan Lynch if (ret < 0) 38450e109b5SAdrian-Ken Rueegsegger crypto_unregister_shash(&sha224); 385cd12fb90SJonathan Lynch 386cd12fb90SJonathan Lynch return ret; 387ad5d2789SSebastian Siewior } 388ad5d2789SSebastian Siewior 3893af5b90bSKamalesh Babulal static void __exit sha256_generic_mod_fini(void) 390ad5d2789SSebastian Siewior { 39150e109b5SAdrian-Ken Rueegsegger crypto_unregister_shash(&sha224); 39250e109b5SAdrian-Ken Rueegsegger crypto_unregister_shash(&sha256); 393ad5d2789SSebastian Siewior } 394ad5d2789SSebastian Siewior 3953af5b90bSKamalesh Babulal module_init(sha256_generic_mod_init); 3963af5b90bSKamalesh Babulal module_exit(sha256_generic_mod_fini); 397ad5d2789SSebastian Siewior 398ad5d2789SSebastian Siewior MODULE_LICENSE("GPL"); 399cd12fb90SJonathan Lynch MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm"); 400ad5d2789SSebastian Siewior 401cd12fb90SJonathan Lynch MODULE_ALIAS("sha224"); 402ad5d2789SSebastian Siewior MODULE_ALIAS("sha256"); 403