mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-24 20:54:10 +08:00
c75c66bbaa
lib/crypto/sha256.c and include/crypto/sha256_base.h define 99% identical functions to init a sha256_state struct for sha224 or sha256 use. This commit moves the functions from lib/crypto/sha256.c to include/crypto/sha.h (making them static inline) and makes the sha224/256_base_init static inline functions from include/crypto/sha256_base.h wrappers around the now also static inline include/crypto/sha.h functions. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
288 lines
10 KiB
C
288 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* 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>
|
|
* Copyright (c) 2014 Red Hat Inc.
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/export.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <crypto/sha.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
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));
|
|
}
|
|
|
|
int sha256_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
|
|
{
|
|
unsigned int partial, done;
|
|
const u8 *src;
|
|
|
|
partial = sctx->count & 0x3f;
|
|
sctx->count += len;
|
|
done = 0;
|
|
src = data;
|
|
|
|
if ((partial + len) > 63) {
|
|
if (partial) {
|
|
done = -partial;
|
|
memcpy(sctx->buf + partial, data, done + 64);
|
|
src = sctx->buf;
|
|
}
|
|
|
|
do {
|
|
sha256_transform(sctx->state, src);
|
|
done += 64;
|
|
src = data + done;
|
|
} while (done + 63 < len);
|
|
|
|
partial = 0;
|
|
}
|
|
memcpy(sctx->buf + partial, src, len - done);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(sha256_update);
|
|
|
|
int sha224_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
|
|
{
|
|
return sha256_update(sctx, data, len);
|
|
}
|
|
EXPORT_SYMBOL(sha224_update);
|
|
|
|
static int __sha256_final(struct sha256_state *sctx, u8 *out, int digest_words)
|
|
{
|
|
__be32 *dst = (__be32 *)out;
|
|
__be64 bits;
|
|
unsigned int index, pad_len;
|
|
int i;
|
|
static const u8 padding[64] = { 0x80, };
|
|
|
|
/* Save number of bits */
|
|
bits = cpu_to_be64(sctx->count << 3);
|
|
|
|
/* Pad out to 56 mod 64. */
|
|
index = sctx->count & 0x3f;
|
|
pad_len = (index < 56) ? (56 - index) : ((64+56) - index);
|
|
sha256_update(sctx, padding, pad_len);
|
|
|
|
/* Append length (before padding) */
|
|
sha256_update(sctx, (const u8 *)&bits, sizeof(bits));
|
|
|
|
/* Store state in digest */
|
|
for (i = 0; i < digest_words; i++)
|
|
put_unaligned_be32(sctx->state[i], &dst[i]);
|
|
|
|
/* Zeroize sensitive information. */
|
|
memset(sctx, 0, sizeof(*sctx));
|
|
|
|
return 0;
|
|
}
|
|
|
|
int sha256_final(struct sha256_state *sctx, u8 *out)
|
|
{
|
|
return __sha256_final(sctx, out, 8);
|
|
}
|
|
EXPORT_SYMBOL(sha256_final);
|
|
|
|
int sha224_final(struct sha256_state *sctx, u8 *out)
|
|
{
|
|
return __sha256_final(sctx, out, 7);
|
|
}
|
|
EXPORT_SYMBOL(sha224_final);
|
|
|
|
MODULE_LICENSE("GPL");
|