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crypto/sha512_generic.c
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/* 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 <linux/kernel.h> #include <linux/module.h> |
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#include <linux/mm.h> #include <linux/init.h> #include <linux/crypto.h> |
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#include <linux/types.h> |
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#include <crypto/sha.h> |
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#include <asm/byteorder.h> |
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struct sha512_ctx { u64 state[8]; u32 count[4]; u8 buf[128]; u64 W[80]; }; 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 inline u64 RORu64(u64 x, u64 y) { return (x >> y) | (x << (64 - 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) (RORu64(x,28) ^ RORu64(x,34) ^ RORu64(x,39)) #define e1(x) (RORu64(x,14) ^ RORu64(x,18) ^ RORu64(x,41)) #define s0(x) (RORu64(x, 1) ^ RORu64(x, 8) ^ (x >> 7)) #define s1(x) (RORu64(x,19) ^ RORu64(x,61) ^ (x >> 6)) |
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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] = s1(W[I-2]) + W[I-7] + s0(W[I-15]) + W[I-16]; } static void sha512_transform(u64 *state, u64 *W, const u8 *input) { u64 a, b, c, d, e, f, g, h, t1, t2; int i; /* load the input */ for (i = 0; i < 16; i++) LOAD_OP(i, W, input); for (i = 16; i < 80; i++) { BLEND_OP(i, W); } /* load the state into our registers */ |
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a=state[0]; b=state[1]; c=state[2]; d=state[3]; e=state[4]; f=state[5]; g=state[6]; h=state[7]; |
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/* now iterate */ for (i=0; i<80; i+=8) { t1 = h + e1(e) + Ch(e,f,g) + sha512_K[i ] + W[i ]; 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+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+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+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+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+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+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+7]; 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; state[4] += e; state[5] += f; state[6] += g; state[7] += h; |
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/* erase our data */ a = b = c = d = e = f = g = h = t1 = t2 = 0; } static void |
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sha512_init(struct crypto_tfm *tfm) |
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{ |
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struct sha512_ctx *sctx = crypto_tfm_ctx(tfm); |
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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; |
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sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; |
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} static void |
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sha384_init(struct crypto_tfm *tfm) |
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{ |
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struct sha512_ctx *sctx = crypto_tfm_ctx(tfm); |
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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; |
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sctx->count[0] = sctx->count[1] = sctx->count[2] = sctx->count[3] = 0; |
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} static void |
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sha512_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len) |
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{ |
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struct sha512_ctx *sctx = crypto_tfm_ctx(tfm); |
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unsigned int i, index, part_len; /* Compute number of bytes mod 128 */ index = (unsigned int)((sctx->count[0] >> 3) & 0x7F); |
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/* Update number of bits */ if ((sctx->count[0] += (len << 3)) < (len << 3)) { if ((sctx->count[1] += 1) < 1) if ((sctx->count[2] += 1) < 1) sctx->count[3]++; sctx->count[1] += (len >> 29); } |
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part_len = 128 - index; |
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/* Transform as many times as possible. */ if (len >= part_len) { memcpy(&sctx->buf[index], data, part_len); sha512_transform(sctx->state, sctx->W, sctx->buf); for (i = part_len; i + 127 < len; i+=128) sha512_transform(sctx->state, sctx->W, &data[i]); index = 0; } else { i = 0; } /* Buffer remaining input */ memcpy(&sctx->buf[index], &data[i], len - i); /* erase our data */ memset(sctx->W, 0, sizeof(sctx->W)); } static void |
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sha512_final(struct crypto_tfm *tfm, u8 *hash) |
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{ |
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struct sha512_ctx *sctx = crypto_tfm_ctx(tfm); |
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static u8 padding[128] = { 0x80, }; |
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__be64 *dst = (__be64 *)hash; __be32 bits[4]; |
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unsigned int index, pad_len; |
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int i; |
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/* Save number of bits */ |
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bits[3] = cpu_to_be32(sctx->count[0]); bits[2] = cpu_to_be32(sctx->count[1]); bits[1] = cpu_to_be32(sctx->count[2]); bits[0] = cpu_to_be32(sctx->count[3]); |
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/* Pad out to 112 mod 128. */ index = (sctx->count[0] >> 3) & 0x7f; pad_len = (index < 112) ? (112 - index) : ((128+112) - index); |
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sha512_update(tfm, padding, pad_len); |
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/* Append length (before padding) */ |
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sha512_update(tfm, (const u8 *)bits, sizeof(bits)); |
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/* Store state in digest */ |
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for (i = 0; i < 8; i++) dst[i] = cpu_to_be64(sctx->state[i]); |
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/* Zeroize sensitive information. */ memset(sctx, 0, sizeof(struct sha512_ctx)); } |
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static void sha384_final(struct crypto_tfm *tfm, u8 *hash) |
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{ |
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u8 D[64]; |
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sha512_final(tfm, D); |
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memcpy(hash, D, 48); memset(D, 0, 64); } static struct crypto_alg sha512 = { .cra_name = "sha512", .cra_flags = CRYPTO_ALG_TYPE_DIGEST, |
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.cra_blocksize = SHA512_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct sha512_ctx), .cra_module = THIS_MODULE, |
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.cra_alignmask = 3, |
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.cra_list = LIST_HEAD_INIT(sha512.cra_list), .cra_u = { .digest = { .dia_digestsize = SHA512_DIGEST_SIZE, .dia_init = sha512_init, .dia_update = sha512_update, .dia_final = sha512_final } } }; static struct crypto_alg sha384 = { .cra_name = "sha384", .cra_flags = CRYPTO_ALG_TYPE_DIGEST, |
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.cra_blocksize = SHA384_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct sha512_ctx), |
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.cra_alignmask = 3, |
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.cra_module = THIS_MODULE, .cra_list = LIST_HEAD_INIT(sha384.cra_list), .cra_u = { .digest = { .dia_digestsize = SHA384_DIGEST_SIZE, .dia_init = sha384_init, .dia_update = sha512_update, .dia_final = sha384_final } } }; |
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static int __init sha512_generic_mod_init(void) |
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{ int ret = 0; if ((ret = crypto_register_alg(&sha384)) < 0) goto out; if ((ret = crypto_register_alg(&sha512)) < 0) crypto_unregister_alg(&sha384); out: return ret; } |
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static void __exit sha512_generic_mod_fini(void) |
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{ crypto_unregister_alg(&sha384); crypto_unregister_alg(&sha512); } |
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module_init(sha512_generic_mod_init); module_exit(sha512_generic_mod_fini); |
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MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("SHA-512 and SHA-384 Secure Hash Algorithms"); |
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MODULE_ALIAS("sha384"); MODULE_ALIAS("sha512"); |