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crypto/sha256_generic.c
12.2 KB
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/* * Cryptographic API. * * SHA-256, as specified in * http://csrc.nist.gov/cryptval/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> |
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* SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com> |
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* * 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 of the License, or (at your option) * any later version. * */ #include <linux/init.h> #include <linux/module.h> #include <linux/mm.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 sha256_ctx {
u32 count[2];
u32 state[8];
u8 buf[128];
};
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))
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1da177e4c
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static inline void LOAD_OP(int I, u32 *W, const u8 *input)
{
W[I] = __be32_to_cpu( ((__be32*)(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;
memset(W, 0, 64 * sizeof(u32));
}
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static void sha224_init(struct crypto_tfm *tfm)
{
struct sha256_ctx *sctx = crypto_tfm_ctx(tfm);
sctx->state[0] = SHA224_H0;
sctx->state[1] = SHA224_H1;
sctx->state[2] = SHA224_H2;
sctx->state[3] = SHA224_H3;
sctx->state[4] = SHA224_H4;
sctx->state[5] = SHA224_H5;
sctx->state[6] = SHA224_H6;
sctx->state[7] = SHA224_H7;
sctx->count[0] = 0;
sctx->count[1] = 0;
}
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static void sha256_init(struct crypto_tfm *tfm) |
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{
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struct sha256_ctx *sctx = crypto_tfm_ctx(tfm); |
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sctx->state[0] = SHA256_H0; sctx->state[1] = SHA256_H1; sctx->state[2] = SHA256_H2; sctx->state[3] = SHA256_H3; sctx->state[4] = SHA256_H4; sctx->state[5] = SHA256_H5; sctx->state[6] = SHA256_H6; sctx->state[7] = SHA256_H7; |
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sctx->count[0] = sctx->count[1] = 0; |
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} |
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static void sha256_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len) |
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{
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struct sha256_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) & 0x3f);
/* Update number of bits */
if ((sctx->count[0] += (len << 3)) < (len << 3)) {
sctx->count[1]++;
sctx->count[1] += (len >> 29);
}
part_len = 64 - index;
/* Transform as many times as possible. */
if (len >= part_len) {
memcpy(&sctx->buf[index], data, part_len);
sha256_transform(sctx->state, sctx->buf);
for (i = part_len; i + 63 < len; i += 64)
sha256_transform(sctx->state, &data[i]);
index = 0;
} else {
i = 0;
}
/* Buffer remaining input */
memcpy(&sctx->buf[index], &data[i], len-i);
}
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static void sha256_final(struct crypto_tfm *tfm, u8 *out) |
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{
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struct sha256_ctx *sctx = crypto_tfm_ctx(tfm); |
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__be32 *dst = (__be32 *)out; __be32 bits[2]; unsigned int index, pad_len; int i; |
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static const u8 padding[64] = { 0x80, };
/* Save number of bits */
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bits[1] = cpu_to_be32(sctx->count[0]); bits[0] = cpu_to_be32(sctx->count[1]); |
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/* Pad out to 56 mod 64. */ index = (sctx->count[0] >> 3) & 0x3f; pad_len = (index < 56) ? (56 - index) : ((64+56) - index); |
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sha256_update(tfm, padding, pad_len); |
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/* Append length (before padding) */ |
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sha256_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_be32(sctx->state[i]); |
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/* Zeroize sensitive information. */ memset(sctx, 0, sizeof(*sctx)); } |
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static void sha224_final(struct crypto_tfm *tfm, u8 *hash)
{
u8 D[SHA256_DIGEST_SIZE];
sha256_final(tfm, D);
memcpy(hash, D, SHA224_DIGEST_SIZE);
memset(D, 0, SHA256_DIGEST_SIZE);
}
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static struct crypto_alg sha256 = {
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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_DIGEST, |
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.cra_blocksize = SHA256_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct sha256_ctx), .cra_module = THIS_MODULE, |
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.cra_alignmask = 3, |
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.cra_list = LIST_HEAD_INIT(sha256.cra_list), |
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.cra_u = { .digest = {
.dia_digestsize = SHA256_DIGEST_SIZE,
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.dia_init = sha256_init,
.dia_update = sha256_update,
.dia_final = sha256_final } }
};
static struct crypto_alg sha224 = {
.cra_name = "sha224",
.cra_driver_name = "sha224-generic",
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_blocksize = SHA224_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct sha256_ctx),
.cra_module = THIS_MODULE,
.cra_alignmask = 3,
.cra_list = LIST_HEAD_INIT(sha224.cra_list),
.cra_u = { .digest = {
.dia_digestsize = SHA224_DIGEST_SIZE,
.dia_init = sha224_init,
.dia_update = sha256_update,
.dia_final = sha224_final } }
|
|
1da177e4c
Linux-2.6.12-rc2
|
347 |
}; |
3af5b90bd
[CRYPTO] all: Cle...
|
348 |
static int __init sha256_generic_mod_init(void) |
|
1da177e4c
Linux-2.6.12-rc2
|
349 |
{
|
|
cd12fb906
[CRYPTO] sha256-g...
|
350 351 352 353 354 355 356 357 358 359 360 361 362 |
int ret = 0; ret = crypto_register_alg(&sha224); if (ret < 0) return ret; ret = crypto_register_alg(&sha256); if (ret < 0) crypto_unregister_alg(&sha224); return ret; |
|
1da177e4c
Linux-2.6.12-rc2
|
363 |
} |
|
3af5b90bd
[CRYPTO] all: Cle...
|
364 |
static void __exit sha256_generic_mod_fini(void) |
|
1da177e4c
Linux-2.6.12-rc2
|
365 |
{
|
|
cd12fb906
[CRYPTO] sha256-g...
|
366 367 |
crypto_unregister_alg(&sha224); crypto_unregister_alg(&sha256); |
|
1da177e4c
Linux-2.6.12-rc2
|
368 |
} |
|
3af5b90bd
[CRYPTO] all: Cle...
|
369 370 |
module_init(sha256_generic_mod_init); module_exit(sha256_generic_mod_fini); |
|
1da177e4c
Linux-2.6.12-rc2
|
371 372 |
MODULE_LICENSE("GPL");
|
|
cd12fb906
[CRYPTO] sha256-g...
|
373 |
MODULE_DESCRIPTION("SHA-224 and SHA-256 Secure Hash Algorithm");
|
|
b3be9a6d9
[CRYPTO] sha: Add...
|
374 |
|
|
cd12fb906
[CRYPTO] sha256-g...
|
375 |
MODULE_ALIAS("sha224");
|
ad5d27899
[CRYPTO] sha: Loa...
|
376 |
MODULE_ALIAS("sha256");
|