| /* SHA-512 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) 2003 Kyle McMartin <kyle@debian.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, or (at your option) any |
| * later version. |
| * |
| */ |
| #include <crypto/internal/hash.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/mm.h> |
| #include <linux/init.h> |
| #include <linux/crypto.h> |
| #include <linux/types.h> |
| #include <crypto/sha.h> |
| #include <linux/percpu.h> |
| #include <asm/byteorder.h> |
| |
| static inline u64 Ch(u64 x, u64 y, u64 z) |
| { |
| return z ^ (x & (y ^ z)); |
| } |
| |
| static inline u64 Maj(u64 x, u64 y, u64 z) |
| { |
| return (x & y) | (z & (x | y)); |
| } |
| |
| static const u64 sha512_K[80] = { |
| 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, |
| 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, |
| 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, |
| 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, |
| 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, |
| 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, |
| 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, |
| 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, |
| 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, |
| 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, |
| 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, |
| 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, |
| 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, |
| 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, |
| 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, |
| 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, |
| 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, |
| 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, |
| 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, |
| 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, |
| 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, |
| 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, |
| 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, |
| 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, |
| 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, |
| 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, |
| 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL, |
| }; |
| |
| #define e0(x) (ror64(x,28) ^ ror64(x,34) ^ ror64(x,39)) |
| #define e1(x) (ror64(x,14) ^ ror64(x,18) ^ ror64(x,41)) |
| #define s0(x) (ror64(x, 1) ^ ror64(x, 8) ^ (x >> 7)) |
| #define s1(x) (ror64(x,19) ^ ror64(x,61) ^ (x >> 6)) |
| |
| static inline void LOAD_OP(int I, u64 *W, const u8 *input) |
| { |
| W[I] = __be64_to_cpu( ((__be64*)(input))[I] ); |
| } |
| |
| static inline void BLEND_OP(int I, u64 *W) |
| { |
| W[I & 15] += s1(W[(I-2) & 15]) + W[(I-7) & 15] + s0(W[(I-15) & 15]); |
| } |
| |
| static void |
| sha512_transform(u64 *state, const u8 *input) |
| { |
| u64 a, b, c, d, e, f, g, h, t1, t2; |
| |
| int i; |
| u64 W[16]; |
| |
| /* 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 */ |
| for (i=0; i<80; i+=8) { |
| if (!(i & 8)) { |
| int j; |
| |
| if (i < 16) { |
| /* load the input */ |
| for (j = 0; j < 16; j++) |
| LOAD_OP(i + j, W, input); |
| } else { |
| for (j = 0; j < 16; j++) { |
| BLEND_OP(i + j, W); |
| } |
| } |
| } |
| |
| t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[(i & 15)]; |
| t2 = e0(a) + Maj(a,b,c); d+=t1; h=t1+t2; |
| t1 = g + e1(d) + Ch(d,e,f) + sha512_K[i+1] + W[(i & 15) + 1]; |
| t2 = e0(h) + Maj(h,a,b); c+=t1; g=t1+t2; |
| t1 = f + e1(c) + Ch(c,d,e) + sha512_K[i+2] + W[(i & 15) + 2]; |
| t2 = e0(g) + Maj(g,h,a); b+=t1; f=t1+t2; |
| t1 = e + e1(b) + Ch(b,c,d) + sha512_K[i+3] + W[(i & 15) + 3]; |
| t2 = e0(f) + Maj(f,g,h); a+=t1; e=t1+t2; |
| t1 = d + e1(a) + Ch(a,b,c) + sha512_K[i+4] + W[(i & 15) + 4]; |
| t2 = e0(e) + Maj(e,f,g); h+=t1; d=t1+t2; |
| t1 = c + e1(h) + Ch(h,a,b) + sha512_K[i+5] + W[(i & 15) + 5]; |
| t2 = e0(d) + Maj(d,e,f); g+=t1; c=t1+t2; |
| t1 = b + e1(g) + Ch(g,h,a) + sha512_K[i+6] + W[(i & 15) + 6]; |
| t2 = e0(c) + Maj(c,d,e); f+=t1; b=t1+t2; |
| t1 = a + e1(f) + Ch(f,g,h) + sha512_K[i+7] + W[(i & 15) + 7]; |
| 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; |
| |
| /* erase our data */ |
| a = b = c = d = e = f = g = h = t1 = t2 = 0; |
| } |
| |
| static int |
| sha512_init(struct shash_desc *desc) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| sctx->state[0] = SHA512_H0; |
| sctx->state[1] = SHA512_H1; |
| sctx->state[2] = SHA512_H2; |
| sctx->state[3] = SHA512_H3; |
| sctx->state[4] = SHA512_H4; |
| sctx->state[5] = SHA512_H5; |
| sctx->state[6] = SHA512_H6; |
| sctx->state[7] = SHA512_H7; |
| sctx->count[0] = sctx->count[1] = 0; |
| |
| return 0; |
| } |
| |
| static int |
| sha384_init(struct shash_desc *desc) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| sctx->state[0] = SHA384_H0; |
| sctx->state[1] = SHA384_H1; |
| sctx->state[2] = SHA384_H2; |
| sctx->state[3] = SHA384_H3; |
| sctx->state[4] = SHA384_H4; |
| sctx->state[5] = SHA384_H5; |
| sctx->state[6] = SHA384_H6; |
| sctx->state[7] = SHA384_H7; |
| sctx->count[0] = sctx->count[1] = 0; |
| |
| return 0; |
| } |
| |
| static int |
| sha512_update(struct shash_desc *desc, const u8 *data, unsigned int len) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| |
| unsigned int i, index, part_len; |
| |
| /* Compute number of bytes mod 128 */ |
| index = sctx->count[0] & 0x7f; |
| |
| /* Update number of bytes */ |
| if ((sctx->count[0] += len) < len) |
| sctx->count[1]++; |
| |
| part_len = 128 - index; |
| |
| /* Transform as many times as possible. */ |
| if (len >= part_len) { |
| memcpy(&sctx->buf[index], data, part_len); |
| sha512_transform(sctx->state, sctx->buf); |
| |
| for (i = part_len; i + 127 < len; i+=128) |
| sha512_transform(sctx->state, &data[i]); |
| |
| index = 0; |
| } else { |
| i = 0; |
| } |
| |
| /* Buffer remaining input */ |
| memcpy(&sctx->buf[index], &data[i], len - i); |
| |
| return 0; |
| } |
| |
| static int |
| sha512_final(struct shash_desc *desc, u8 *hash) |
| { |
| struct sha512_state *sctx = shash_desc_ctx(desc); |
| static u8 padding[128] = { 0x80, }; |
| __be64 *dst = (__be64 *)hash; |
| __be64 bits[2]; |
| unsigned int index, pad_len; |
| int i; |
| |
| /* Save number of bits */ |
| bits[1] = cpu_to_be64(sctx->count[0] << 3); |
| bits[0] = cpu_to_be64(sctx->count[1] << 3 | sctx->count[0] >> 61); |
| |
| /* Pad out to 112 mod 128. */ |
| index = sctx->count[0] & 0x7f; |
| pad_len = (index < 112) ? (112 - index) : ((128+112) - index); |
| sha512_update(desc, padding, pad_len); |
| |
| /* Append length (before padding) */ |
| sha512_update(desc, (const u8 *)bits, sizeof(bits)); |
| |
| /* Store state in digest */ |
| for (i = 0; i < 8; i++) |
| dst[i] = cpu_to_be64(sctx->state[i]); |
| |
| /* Zeroize sensitive information. */ |
| memset(sctx, 0, sizeof(struct sha512_state)); |
| |
| return 0; |
| } |
| |
| static int sha384_final(struct shash_desc *desc, u8 *hash) |
| { |
| u8 D[64]; |
| |
| sha512_final(desc, D); |
| |
| memcpy(hash, D, 48); |
| memset(D, 0, 64); |
| |
| return 0; |
| } |
| |
| static struct shash_alg sha512 = { |
| .digestsize = SHA512_DIGEST_SIZE, |
| .init = sha512_init, |
| .update = sha512_update, |
| .final = sha512_final, |
| .descsize = sizeof(struct sha512_state), |
| .base = { |
| .cra_name = "sha512", |
| .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| .cra_blocksize = SHA512_BLOCK_SIZE, |
| .cra_module = THIS_MODULE, |
| } |
| }; |
| |
| static struct shash_alg sha384 = { |
| .digestsize = SHA384_DIGEST_SIZE, |
| .init = sha384_init, |
| .update = sha512_update, |
| .final = sha384_final, |
| .descsize = sizeof(struct sha512_state), |
| .base = { |
| .cra_name = "sha384", |
| .cra_flags = CRYPTO_ALG_TYPE_SHASH, |
| .cra_blocksize = SHA384_BLOCK_SIZE, |
| .cra_module = THIS_MODULE, |
| } |
| }; |
| |
| static int __init sha512_generic_mod_init(void) |
| { |
| int ret = 0; |
| |
| if ((ret = crypto_register_shash(&sha384)) < 0) |
| goto out; |
| if ((ret = crypto_register_shash(&sha512)) < 0) |
| crypto_unregister_shash(&sha384); |
| out: |
| return ret; |
| } |
| |
| static void __exit sha512_generic_mod_fini(void) |
| { |
| crypto_unregister_shash(&sha384); |
| crypto_unregister_shash(&sha512); |
| } |
| |
| module_init(sha512_generic_mod_init); |
| module_exit(sha512_generic_mod_fini); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms"); |
| |
| MODULE_ALIAS("sha384"); |
| MODULE_ALIAS("sha512"); |