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d88a6165c4d62b513088dd0a7c7ea9d39d4c2bf0
android_kernel_xiaomi_sm8450/lib/crypto/sha256.c
Ard Biesheuvel 7a689ebc67 ANDROID: crypto: lib/sha256 - add vendor hook for sha256() routine 
Add a vendor hook that will allow the FIPS140 kernel module to override
the implementation of the sha256() library routine. The FIPS 140 version
is identical to the normal one, but its code and rodata will have been
integrity checked at module load time.

Bug: 153614920
Bug: 188620248
Change-Id: I8ccc4f0cc8206af39fa922134b438dacac2a614a
Signed-off-by: Ard Biesheuvel <ardb@google.com>
2021-06-11 07:49:57 +00:00

303 lines
11 KiB
C
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// 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>
#include <trace/hooks/fips140.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));
}
void 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);
}
EXPORT_SYMBOL(sha256_update);
void sha224_update(struct sha256_state *sctx, const u8 *data, unsigned int len)
{
sha256_update(sctx, data, len);
}
EXPORT_SYMBOL(sha224_update);
static void __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));
}
void sha256_final(struct sha256_state *sctx, u8 *out)
{
__sha256_final(sctx, out, 8);
}
EXPORT_SYMBOL(sha256_final);
void sha224_final(struct sha256_state *sctx, u8 *out)
{
__sha256_final(sctx, out, 7);
}
EXPORT_SYMBOL(sha224_final);
void sha256(const u8 *data, unsigned int len, u8 *out)
{
struct sha256_state sctx;
#if defined(CONFIG_CRYPTO_FIPS140) && !defined(BUILD_FIPS140_KO)
int hook_inuse = 0;
trace_android_vh_sha256(data, len, out, &hook_inuse);
if (hook_inuse)
return;
#endif
sha256_init(&sctx);
sha256_update(&sctx, data, len);
sha256_final(&sctx, out);
}
EXPORT_SYMBOL(sha256);
MODULE_LICENSE("GPL");
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