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barebox/crypto/sha4.c

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/*
* FIPS-180-2 compliant SHA-384/512 implementation
*
* Copyright (C) 2006-2007 Christophe Devine
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* The SHA-512 Secure Hash Standard was published by NIST in 2002.
*
* http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
*/
#include <common.h>
#include <digest.h>
#include <init.h>
#include <linux/string.h>
#include <asm/byteorder.h>
#include <crypto/internal.h>
#define SHA384_SUM_LEN 48
#define SHA512_SUM_LEN 64
typedef struct {
uint64_t total[2];
uint64_t state[8];
uint8_t buffer[128];
int is384;
} sha4_context;
/*
* 64-bit integer manipulation macros (big endian)
*/
#define GET_UINT64_BE(n,b,i) (n) = be64_to_cpu(((uint64_t*)(b))[i / 8])
#define PUT_UINT64_BE(n,b,i) ((uint64_t*)(b))[i / 8] = cpu_to_be64(n)
/*
* Round constants
*/
static const uint64_t K[80] = {
0x428A2F98D728AE22, 0x7137449123EF65CD,
0xB5C0FBCFEC4D3B2F, 0xE9B5DBA58189DBBC,
0x3956C25BF348B538, 0x59F111F1B605D019,
0x923F82A4AF194F9B, 0xAB1C5ED5DA6D8118,
0xD807AA98A3030242, 0x12835B0145706FBE,
0x243185BE4EE4B28C, 0x550C7DC3D5FFB4E2,
0x72BE5D74F27B896F, 0x80DEB1FE3B1696B1,
0x9BDC06A725C71235, 0xC19BF174CF692694,
0xE49B69C19EF14AD2, 0xEFBE4786384F25E3,
0x0FC19DC68B8CD5B5, 0x240CA1CC77AC9C65,
0x2DE92C6F592B0275, 0x4A7484AA6EA6E483,
0x5CB0A9DCBD41FBD4, 0x76F988DA831153B5,
0x983E5152EE66DFAB, 0xA831C66D2DB43210,
0xB00327C898FB213F, 0xBF597FC7BEEF0EE4,
0xC6E00BF33DA88FC2, 0xD5A79147930AA725,
0x06CA6351E003826F, 0x142929670A0E6E70,
0x27B70A8546D22FFC, 0x2E1B21385C26C926,
0x4D2C6DFC5AC42AED, 0x53380D139D95B3DF,
0x650A73548BAF63DE, 0x766A0ABB3C77B2A8,
0x81C2C92E47EDAEE6, 0x92722C851482353B,
0xA2BFE8A14CF10364, 0xA81A664BBC423001,
0xC24B8B70D0F89791, 0xC76C51A30654BE30,
0xD192E819D6EF5218, 0xD69906245565A910,
0xF40E35855771202A, 0x106AA07032BBD1B8,
0x19A4C116B8D2D0C8, 0x1E376C085141AB53,
0x2748774CDF8EEB99, 0x34B0BCB5E19B48A8,
0x391C0CB3C5C95A63, 0x4ED8AA4AE3418ACB,
0x5B9CCA4F7763E373, 0x682E6FF3D6B2B8A3,
0x748F82EE5DEFB2FC, 0x78A5636F43172F60,
0x84C87814A1F0AB72, 0x8CC702081A6439EC,
0x90BEFFFA23631E28, 0xA4506CEBDE82BDE9,
0xBEF9A3F7B2C67915, 0xC67178F2E372532B,
0xCA273ECEEA26619C, 0xD186B8C721C0C207,
0xEADA7DD6CDE0EB1E, 0xF57D4F7FEE6ED178,
0x06F067AA72176FBA, 0x0A637DC5A2C898A6,
0x113F9804BEF90DAE, 0x1B710B35131C471B,
0x28DB77F523047D84, 0x32CAAB7B40C72493,
0x3C9EBE0A15C9BEBC, 0x431D67C49C100D4C,
0x4CC5D4BECB3E42B6, 0x597F299CFC657E2A,
0x5FCB6FAB3AD6FAEC, 0x6C44198C4A475817
};
/*
* SHA-512 context setup
*/
static void sha4_starts(sha4_context *ctx, int is384)
{
ctx->total[0] = 0;
ctx->total[1] = 0;
if (is384 == 0 && IS_ENABLED(CONFIG_SHA512)) {
/* SHA-512 */
ctx->state[0] = 0x6A09E667F3BCC908;
ctx->state[1] = 0xBB67AE8584CAA73B;
ctx->state[2] = 0x3C6EF372FE94F82B;
ctx->state[3] = 0xA54FF53A5F1D36F1;
ctx->state[4] = 0x510E527FADE682D1;
ctx->state[5] = 0x9B05688C2B3E6C1F;
ctx->state[6] = 0x1F83D9ABFB41BD6B;
ctx->state[7] = 0x5BE0CD19137E2179;
} else if (IS_ENABLED(CONFIG_SHA384)) {
/* SHA-384 */
ctx->state[0] = 0xCBBB9D5DC1059ED8;
ctx->state[1] = 0x629A292A367CD507;
ctx->state[2] = 0x9159015A3070DD17;
ctx->state[3] = 0x152FECD8F70E5939;
ctx->state[4] = 0x67332667FFC00B31;
ctx->state[5] = 0x8EB44A8768581511;
ctx->state[6] = 0xDB0C2E0D64F98FA7;
ctx->state[7] = 0x47B5481DBEFA4FA4;
}
ctx->is384 = is384;
}
static void sha4_process(sha4_context *ctx, unsigned char data[128])
{
int i;
uint64_t temp1, temp2, W[80];
uint64_t A, B, C, D, E, F, G, H;
#define SHR(x,n) (x >> n)
#define ROTR(x,n) (SHR(x,n) | (x << (64 - n)))
#define S0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^ SHR(x, 7))
#define S1(x) (ROTR(x,19) ^ ROTR(x,61) ^ SHR(x, 6))
#define S2(x) (ROTR(x,28) ^ ROTR(x,34) ^ ROTR(x,39))
#define S3(x) (ROTR(x,14) ^ ROTR(x,18) ^ ROTR(x,41))
#define F0(x,y,z) ((x & y) | (z & (x | y)))
#define F1(x,y,z) (z ^ (x & (y ^ z)))
#define P(a,b,c,d,e,f,g,h,x,K) \
{ \
temp1 = h + S3(e) + F1(e,f,g) + K + x; \
temp2 = S2(a) + F0(a,b,c); \
d += temp1; h = temp1 + temp2; \
}
for (i = 0; i < 16; i++) {
GET_UINT64_BE(W[i], data, i << 3);
}
for (; i < 80; i++) {
W[i] = S1(W[i - 2]) + W[i - 7] + S0(W[i - 15]) + W[i - 16];
}
A = ctx->state[0];
B = ctx->state[1];
C = ctx->state[2];
D = ctx->state[3];
E = ctx->state[4];
F = ctx->state[5];
G = ctx->state[6];
H = ctx->state[7];
i = 0;
do {
P(A, B, C, D, E, F, G, H, W[i], K[i]);
i++;
P(H, A, B, C, D, E, F, G, W[i], K[i]);
i++;
P(G, H, A, B, C, D, E, F, W[i], K[i]);
i++;
P(F, G, H, A, B, C, D, E, W[i], K[i]);
i++;
P(E, F, G, H, A, B, C, D, W[i], K[i]);
i++;
P(D, E, F, G, H, A, B, C, W[i], K[i]);
i++;
P(C, D, E, F, G, H, A, B, W[i], K[i]);
i++;
P(B, C, D, E, F, G, H, A, W[i], K[i]);
i++;
} while (i < 80);
ctx->state[0] += A;
ctx->state[1] += B;
ctx->state[2] += C;
ctx->state[3] += D;
ctx->state[4] += E;
ctx->state[5] += F;
ctx->state[6] += G;
ctx->state[7] += H;
}
/*
* SHA-512 process buffer
*/
static void sha4_update(sha4_context *ctx, unsigned char *input, int ilen)
{
int fill;
uint64_t left;
if (ilen <= 0)
return;
left = ctx->total[0] & 0x7F;
fill = (int)(128 - left);
ctx->total[0] += ilen;
if (ctx->total[0] < (uint64_t)ilen)
ctx->total[1]++;
if (left && ilen >= fill) {
memcpy((void *)(ctx->buffer + left), (void *)input, fill);
sha4_process(ctx, ctx->buffer);
input += fill;
ilen -= fill;
left = 0;
}
while (ilen >= 128) {
sha4_process(ctx, input);
input += 128;
ilen -= 128;
}
if (ilen > 0)
memcpy((void *)(ctx->buffer + left), (void *)input, ilen);
}
static const unsigned char sha4_padding[128] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
/*
* SHA-512 final digest
*/
static void sha4_finish(sha4_context *ctx, unsigned char output[64])
{
int last, padn;
uint64_t high, low;
unsigned char msglen[16];
high = (ctx->total[0] >> 61)
| (ctx->total[1] << 3);
low = (ctx->total[0] << 3);
PUT_UINT64_BE(high, msglen, 0);
PUT_UINT64_BE(low, msglen, 8);
last = (int)(ctx->total[0] & 0x7F);
padn = (last < 112) ? (112 - last) : (240 - last);
sha4_update(ctx, (unsigned char *)sha4_padding, padn);
sha4_update(ctx, msglen, 16);
PUT_UINT64_BE(ctx->state[0], output, 0);
PUT_UINT64_BE(ctx->state[1], output, 8);
PUT_UINT64_BE(ctx->state[2], output, 16);
PUT_UINT64_BE(ctx->state[3], output, 24);
PUT_UINT64_BE(ctx->state[4], output, 32);
PUT_UINT64_BE(ctx->state[5], output, 40);
if (ctx->is384 == 0) {
PUT_UINT64_BE(ctx->state[6], output, 48);
PUT_UINT64_BE(ctx->state[7], output, 56);
}
}
static int digest_sha4_update(struct digest *d, const void *data,
unsigned long len)
{
sha4_update(d->ctx, (uint8_t *)data, len);
return 0;
}
static int digest_sha4_final(struct digest *d, unsigned char *md)
{
sha4_finish(d->ctx, md);
return 0;
}
static int digest_sha384_init(struct digest *d)
{
sha4_starts(d->ctx, 1);
return 0;
}
static struct digest_algo m384 = {
.base = {
.name = "sha384",
.driver_name = "sha384-generic",
.priority = 0,
},
.init = digest_sha384_init,
.update = digest_sha4_update,
.final = digest_sha4_final,
.verify = digest_generic_verify,
.length = SHA384_SUM_LEN,
.ctx_length = sizeof(sha4_context),
};
static int sha384_digest_register(void)
{
if (!IS_ENABLED(CONFIG_SHA384))
return 0;
return digest_algo_register(&m384);
}
device_initcall(sha384_digest_register);
static int digest_sha512_init(struct digest *d)
{
sha4_starts(d->ctx, 0);
return 0;
}
static struct digest_algo m512 = {
.base = {
.name = "sha512",
.driver_name = "sha512-generic",
.priority = 0,
},
.init = digest_sha512_init,
.update = digest_sha4_update,
.final = digest_sha4_final,
.digest = digest_generic_digest,
.verify = digest_generic_verify,
.length = SHA512_SUM_LEN,
.ctx_length = sizeof(sha4_context),
};
static int sha512_digest_register(void)
{
if (!IS_ENABLED(CONFIG_SHA512))
return 0;
return digest_algo_register(&m512);
}
device_initcall(sha512_digest_register);
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