| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Cryptographic API. |
| * |
| * SHA-256, as specified in |
| * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf |
| * |
| * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>. |
| * |
| * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com> |
| * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk> |
| * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> |
| * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> |
| */ |
| #include <crypto/internal/hash.h> |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/mm.h> |
| #include <linux/types.h> |
| #include <crypto/sha.h> |
| #include <crypto/sha256_base.h> |
| #include <asm/byteorder.h> |
| #include <asm/unaligned.h> |
| |
| const u8 sha224_zero_message_hash[SHA224_DIGEST_SIZE] = { |
| 0xd1, 0x4a, 0x02, 0x8c, 0x2a, 0x3a, 0x2b, 0xc9, 0x47, |
| 0x61, 0x02, 0xbb, 0x28, 0x82, 0x34, 0xc4, 0x15, 0xa2, |
| 0xb0, 0x1f, 0x82, 0x8e, 0xa6, 0x2a, 0xc5, 0xb3, 0xe4, |
| 0x2f |
| }; |
| EXPORT_SYMBOL_GPL(sha224_zero_message_hash); |
| |
| const u8 sha256_zero_message_hash[SHA256_DIGEST_SIZE] = { |
| 0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14, |
| 0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24, |
| 0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c, |
| 0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55 |
| }; |
| EXPORT_SYMBOL_GPL(sha256_zero_message_hash); |
| |
| static inline u32 Ch(u32 x, u32 y, u32 z) |
| { |
| return z ^ (x & (y ^ z)); |
| } |
| |
| static inline u32 Maj(u32 x, u32 y, u32 z) |
| { |
| return (x & y) | (z & (x | y)); |
| } |
| |
| #define e0(x) (ror32(x, 2) ^ ror32(x,13) ^ ror32(x,22)) |
| #define e1(x) (ror32(x, 6) ^ ror32(x,11) ^ ror32(x,25)) |
| #define s0(x) (ror32(x, 7) ^ ror32(x,18) ^ (x >> 3)) |
| #define s1(x) (ror32(x,17) ^ ror32(x,19) ^ (x >> 10)) |
| |
| static inline void LOAD_OP(int I, u32 *W, const u8 *input) |
| { |
| W[I] = get_unaligned_be32((__u32 *)input + I); |
| } |
| |
| static inline void BLEND_OP(int I, u32 *W) |
| { |
| W[I] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; |
| } |
| |
| static void sha256_transform(u32 *state, const u8 *input) |
| { |
| u32 a, b, c, d, e, f, g, h, t1, t2; |
| u32 W[64]; |
| int i; |
| |
| /* load the input */ |
| for (i = 0; i < 16; i++) |
| LOAD_OP(i, W, input); |
| |
| /* now blend */ |
| for (i = 16; i < 64; i++) |
| BLEND_OP(i, W); |
| |
| /* load the state into our registers */ |
| a=state[0]; b=state[1]; c=state[2]; d=state[3]; |
| e=state[4]; f=state[5]; g=state[6]; h=state[7]; |
| |
| /* now iterate */ |
| t1 = h + e1(e) + Ch(e,f,g) + 0x428a2f98 + W[ 0]; |
| t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
| t1 = g + e1(d) + Ch(d,e,f) + 0x71374491 + W[ 1]; |
| t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
| t1 = f + e1(c) + Ch(c,d,e) + 0xb5c0fbcf + W[ 2]; |
| t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
| t1 = e + e1(b) + Ch(b,c,d) + 0xe9b5dba5 + W[ 3]; |
| t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
| t1 = d + e1(a) + Ch(a,b,c) + 0x3956c25b + W[ 4]; |
| t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
| t1 = c + e1(h) + Ch(h,a,b) + 0x59f111f1 + W[ 5]; |
| t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
| t1 = b + e1(g) + Ch(g,h,a) + 0x923f82a4 + W[ 6]; |
| t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
| t1 = a + e1(f) + Ch(f,g,h) + 0xab1c5ed5 + W[ 7]; |
| t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
| |
| t1 = h + e1(e) + Ch(e,f,g) + 0xd807aa98 + W[ 8]; |
| t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
| t1 = g + e1(d) + Ch(d,e,f) + 0x12835b01 + W[ 9]; |
| t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
| t1 = f + e1(c) + Ch(c,d,e) + 0x243185be + W[10]; |
| t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
| t1 = e + e1(b) + Ch(b,c,d) + 0x550c7dc3 + W[11]; |
| t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
| t1 = d + e1(a) + Ch(a,b,c) + 0x72be5d74 + W[12]; |
| t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
| t1 = c + e1(h) + Ch(h,a,b) + 0x80deb1fe + W[13]; |
| t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
| t1 = b + e1(g) + Ch(g,h,a) + 0x9bdc06a7 + W[14]; |
| t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
| t1 = a + e1(f) + Ch(f,g,h) + 0xc19bf174 + W[15]; |
| t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
| |
| t1 = h + e1(e) + Ch(e,f,g) + 0xe49b69c1 + W[16]; |
| t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
| t1 = g + e1(d) + Ch(d,e,f) + 0xefbe4786 + W[17]; |
| t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
| t1 = f + e1(c) + Ch(c,d,e) + 0x0fc19dc6 + W[18]; |
| t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
| t1 = e + e1(b) + Ch(b,c,d) + 0x240ca1cc + W[19]; |
| t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
| t1 = d + e1(a) + Ch(a,b,c) + 0x2de92c6f + W[20]; |
| t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
| t1 = c + e1(h) + Ch(h,a,b) + 0x4a7484aa + W[21]; |
| t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
| t1 = b + e1(g) + Ch(g,h,a) + 0x5cb0a9dc + W[22]; |
| t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
| t1 = a + e1(f) + Ch(f,g,h) + 0x76f988da + W[23]; |
| t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
| |
| t1 = h + e1(e) + Ch(e,f,g) + 0x983e5152 + W[24]; |
| t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
| t1 = g + e1(d) + Ch(d,e,f) + 0xa831c66d + W[25]; |
| t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
| t1 = f + e1(c) + Ch(c,d,e) + 0xb00327c8 + W[26]; |
| t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
| t1 = e + e1(b) + Ch(b,c,d) + 0xbf597fc7 + W[27]; |
| t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
| t1 = d + e1(a) + Ch(a,b,c) + 0xc6e00bf3 + W[28]; |
| t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
| t1 = c + e1(h) + Ch(h,a,b) + 0xd5a79147 + W[29]; |
| t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
| t1 = b + e1(g) + Ch(g,h,a) + 0x06ca6351 + W[30]; |
| t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
| t1 = a + e1(f) + Ch(f,g,h) + 0x14292967 + W[31]; |
| t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
| |
| t1 = h + e1(e) + Ch(e,f,g) + 0x27b70a85 + W[32]; |
| t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
| t1 = g + e1(d) + Ch(d,e,f) + 0x2e1b2138 + W[33]; |
| t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
| t1 = f + e1(c) + Ch(c,d,e) + 0x4d2c6dfc + W[34]; |
| t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
| t1 = e + e1(b) + Ch(b,c,d) + 0x53380d13 + W[35]; |
| t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
| t1 = d + e1(a) + Ch(a,b,c) + 0x650a7354 + W[36]; |
| t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
| t1 = c + e1(h) + Ch(h,a,b) + 0x766a0abb + W[37]; |
| t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
| t1 = b + e1(g) + Ch(g,h,a) + 0x81c2c92e + W[38]; |
| t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
| t1 = a + e1(f) + Ch(f,g,h) + 0x92722c85 + W[39]; |
| t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
| |
| t1 = h + e1(e) + Ch(e,f,g) + 0xa2bfe8a1 + W[40]; |
| t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
| t1 = g + e1(d) + Ch(d,e,f) + 0xa81a664b + W[41]; |
| t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
| t1 = f + e1(c) + Ch(c,d,e) + 0xc24b8b70 + W[42]; |
| t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
| t1 = e + e1(b) + Ch(b,c,d) + 0xc76c51a3 + W[43]; |
| t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
| t1 = d + e1(a) + Ch(a,b,c) + 0xd192e819 + W[44]; |
| t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
| t1 = c + e1(h) + Ch(h,a,b) + 0xd6990624 + W[45]; |
| t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
| t1 = b + e1(g) + Ch(g,h,a) + 0xf40e3585 + W[46]; |
| t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
| t1 = a + e1(f) + Ch(f,g,h) + 0x106aa070 + W[47]; |
| t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
| |
| t1 = h + e1(e) + Ch(e,f,g) + 0x19a4c116 + W[48]; |
| t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
| t1 = g + e1(d) + Ch(d,e,f) + 0x1e376c08 + W[49]; |
| t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
| t1 = f + e1(c) + Ch(c,d,e) + 0x2748774c + W[50]; |
| t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
| t1 = e + e1(b) + Ch(b,c,d) + 0x34b0bcb5 + W[51]; |
| t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
| t1 = d + e1(a) + Ch(a,b,c) + 0x391c0cb3 + W[52]; |
| t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
| t1 = c + e1(h) + Ch(h,a,b) + 0x4ed8aa4a + W[53]; |
| t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
| t1 = b + e1(g) + Ch(g,h,a) + 0x5b9cca4f + W[54]; |
| t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
| t1 = a + e1(f) + Ch(f,g,h) + 0x682e6ff3 + W[55]; |
| t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
| |
| t1 = h + e1(e) + Ch(e,f,g) + 0x748f82ee + W[56]; |
| t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
| t1 = g + e1(d) + Ch(d,e,f) + 0x78a5636f + W[57]; |
| t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
| t1 = f + e1(c) + Ch(c,d,e) + 0x84c87814 + W[58]; |
| t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
| t1 = e + e1(b) + Ch(b,c,d) + 0x8cc70208 + W[59]; |
| t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
| t1 = d + e1(a) + Ch(a,b,c) + 0x90befffa + W[60]; |
| t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
| t1 = c + e1(h) + Ch(h,a,b) + 0xa4506ceb + W[61]; |
| t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
| t1 = b + e1(g) + Ch(g,h,a) + 0xbef9a3f7 + W[62]; |
| t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
| t1 = a + e1(f) + Ch(f,g,h) + 0xc67178f2 + W[63]; |
| t2 = e0(b) + Maj(b,c,d); e+=t1; a=t1+t2; |
| |
| state[0] += a; state[1] += b; state[2] += c; state[3] += d; |
| state[4] += e; state[5] += f; state[6] += g; state[7] += h; |
| |
| /* clear any sensitive info... */ |
| a = b = c = d = e = f = g = h = t1 = t2 = 0; |
| memzero_explicit(W, 64 * sizeof(u32)); |
| } |
| |
| static void sha256_generic_block_fn(struct sha256_state *sst, u8 const *src, |
| int blocks) |
| { |
| while (blocks--) { |
| sha256_transform(sst->state, src); |
| src += SHA256_BLOCK_SIZE; |
| } |
| } |
| |
| int crypto_sha256_update(struct shash_desc *desc, const u8 *data, |
| unsigned int len) |
| { |
| return sha256_base_do_update(desc, data, len, sha256_generic_block_fn); |
| } |
| EXPORT_SYMBOL(crypto_sha256_update); |
| |
| static int sha256_final(struct shash_desc *desc, u8 *out) |
| { |
| sha256_base_do_finalize(desc, sha256_generic_block_fn); |
| return sha256_base_finish(desc, out); |
| } |
| |
| int crypto_sha256_finup(struct shash_desc *desc, const u8 *data, |
| unsigned int len, u8 *hash) |
| { |
| sha256_base_do_update(desc, data, len, sha256_generic_block_fn); |
| return sha256_final(desc, hash); |
| } |
| EXPORT_SYMBOL(crypto_sha256_finup); |
| |
| static struct shash_alg sha256_algs[2] = { { |
| .digestsize = SHA256_DIGEST_SIZE, |
| .init = sha256_base_init, |
| .update = crypto_sha256_update, |
| .final = sha256_final, |
| .finup = crypto_sha256_finup, |
| .descsize = sizeof(struct sha256_state), |
| .base = { |
| .cra_name = "sha256", |
| .cra_driver_name= "sha256-generic", |
| .cra_priority = 100, |
| .cra_blocksize = SHA256_BLOCK_SIZE, |
| .cra_module = THIS_MODULE, |
| } |
| }, { |
| .digestsize = SHA224_DIGEST_SIZE, |
| .init = sha224_base_init, |
| .update = crypto_sha256_update, |
| .final = sha256_final, |
| .finup = crypto_sha256_finup, |
| .descsize = sizeof(struct sha256_state), |
| .base = { |
| .cra_name = "sha224", |
| .cra_driver_name= "sha224-generic", |
| .cra_priority = 100, |
| .cra_blocksize = SHA224_BLOCK_SIZE, |
| .cra_module = THIS_MODULE, |
| } |
| } }; |
| |
| static int __init sha256_generic_mod_init(void) |
| { |
| return crypto_register_shashes(sha256_algs, ARRAY_SIZE(sha256_algs)); |
| } |
| |
| static void __exit sha256_generic_mod_fini(void) |
| { |
| crypto_unregister_shashes(sha256_algs, ARRAY_SIZE(sha256_algs)); |
| } |
| |
| subsys_initcall(sha256_generic_mod_init); |
| module_exit(sha256_generic_mod_fini); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm"); |
| |
| MODULE_ALIAS_CRYPTO("sha224"); |
| MODULE_ALIAS_CRYPTO("sha224-generic"); |
| MODULE_ALIAS_CRYPTO("sha256"); |
| MODULE_ALIAS_CRYPTO("sha256-generic"); |
