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update sha256.c

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NIIBE Yutaka
2013-02-19 12:07:53 +09:00
parent a8f4e517fc
commit 70c0f63629
2 changed files with 35 additions and 32 deletions
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2
ChangeLog
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@@ -1,5 +1,7 @@
2013-02-19 Niibe Yutaka <gniibe@fsij.org>
* src/sha256.c: Update from NeuG 0.05.
* ChibiOS_2.0.8: Remove.
2013-02-18 Niibe Yutaka <gniibe@fsij.org>

65
src/sha256.c
View File

@@ -52,10 +52,13 @@
#define SHA256_MASK (SHA256_BLOCK_SIZE - 1)
static void bswap32_buf (uint32_t *p, int n)
static void memcpy_bswap32 (void *dst, const uint32_t *p, int n)
{
uint32_t *q = (uint32_t *)dst;
n >>= 2;
while (n--)
p[n] = __builtin_bswap32 (p[n]); /* bswap32 is GCC extention */
q[n] = __builtin_bswap32 (p[n]); /* bswap32 is GCC extention */
}
#define rotr32(x,n) (((x) >> n) | ((x) << (32 - n)))
@@ -69,8 +72,15 @@ static void bswap32_buf (uint32_t *p, int n)
#define hf(i) (p[i & 15] += \
g_1(p[(i + 14) & 15]) + p[(i + 9) & 15] + g_0(p[(i + 1) & 15]))
#define v_cycle(i,j) \
vf(7,i) += (j ? hf(i) : p[i]) + k_0[i+j] \
#define v_cycle0(i) \
p[i] = __builtin_bswap32 (p[i]); \
vf(7,i) += p[i] + k_0[i] \
+ s_1(vf(4,i)) + ch(vf(4,i),vf(5,i),vf(6,i)); \
vf(3,i) += vf(7,i); \
vf(7,i) += s_0(vf(0,i))+ maj(vf(0,i),vf(1,i),vf(2,i))
#define v_cycle(i, j) \
vf(7,i) += hf(i) + k_0[i+j] \
+ s_1(vf(4,i)) + ch(vf(4,i),vf(5,i),vf(6,i)); \
vf(3,i) += vf(7,i); \
vf(7,i) += s_0(vf(0,i))+ maj(vf(0,i),vf(1,i),vf(2,i))
@@ -81,7 +91,7 @@ static void bswap32_buf (uint32_t *p, int n)
#define g_1(x) (rotr32((x), 17) ^ rotr32((x), 19) ^ ((x) >> 10))
#define k_0 k256
const uint32_t k256[64] = {
static const uint32_t k256[64] = {
0X428A2F98, 0X71374491, 0XB5C0FBCF, 0XE9B5DBA5,
0X3956C25B, 0X59F111F1, 0X923F82A4, 0XAB1C5ED5,
0XD807AA98, 0X12835B01, 0X243185BE, 0X550C7DC3,
@@ -109,24 +119,17 @@ sha256_process (sha256_context *ctx)
memcpy (v, ctx->state, 8 * sizeof (uint32_t));
for (i = 0; i < 64; i += 16)
v_cycle0 ( 0); v_cycle0 ( 1); v_cycle0 ( 2); v_cycle0 ( 3);
v_cycle0 ( 4); v_cycle0 ( 5); v_cycle0 ( 6); v_cycle0 ( 7);
v_cycle0 ( 8); v_cycle0 ( 9); v_cycle0 (10); v_cycle0 (11);
v_cycle0 (12); v_cycle0 (13); v_cycle0 (14); v_cycle0 (15);
for (i = 16; i < 64; i += 16)
{
v_cycle ( 0, i);
v_cycle ( 1, i);
v_cycle ( 2, i);
v_cycle ( 3, i);
v_cycle ( 4, i);
v_cycle ( 5, i);
v_cycle ( 6, i);
v_cycle ( 7, i);
v_cycle ( 8, i);
v_cycle ( 9, i);
v_cycle (10, i);
v_cycle (11, i);
v_cycle (12, i);
v_cycle (13, i);
v_cycle (14, i);
v_cycle (15, i);
v_cycle ( 0, i); v_cycle ( 1, i); v_cycle ( 2, i); v_cycle ( 3, i);
v_cycle ( 4, i); v_cycle ( 5, i); v_cycle ( 6, i); v_cycle ( 7, i);
v_cycle ( 8, i); v_cycle ( 9, i); v_cycle (10, i); v_cycle (11, i);
v_cycle (12, i); v_cycle (13, i); v_cycle (14, i); v_cycle (15, i);
}
ctx->state[0] += v[0];
@@ -141,7 +144,7 @@ sha256_process (sha256_context *ctx)
void
sha256_update (sha256_context *ctx, const unsigned char *input,
unsigned int ilen)
unsigned int ilen)
{
uint32_t left = (ctx->total[0] & SHA256_MASK);
uint32_t fill = SHA256_BLOCK_SIZE - left;
@@ -153,7 +156,6 @@ sha256_update (sha256_context *ctx, const unsigned char *input,
while (ilen >= fill)
{
memcpy (((unsigned char*)ctx->wbuf) + left, input, fill);
bswap32_buf (ctx->wbuf, SHA256_BLOCK_SIZE >> 2);
sha256_process (ctx);
input += fill;
ilen -= fill;
@@ -169,15 +171,15 @@ sha256_finish (sha256_context *ctx, unsigned char output[32])
{
uint32_t last = (ctx->total[0] & SHA256_MASK);
bswap32_buf (ctx->wbuf, (last + 3) >> 2);
ctx->wbuf[last >> 2] = __builtin_bswap32 (ctx->wbuf[last >> 2]);
ctx->wbuf[last >> 2] &= 0xffffff80 << (8 * (~last & 3));
ctx->wbuf[last >> 2] |= 0x00000080 << (8 * (~last & 3));
ctx->wbuf[last >> 2] = __builtin_bswap32 (ctx->wbuf[last >> 2]);
if (last > SHA256_BLOCK_SIZE - 9)
{
if (last < 60)
ctx->wbuf[15] = 0;
ctx->wbuf[15] = 0;
sha256_process (ctx);
last = 0;
}
@@ -187,12 +189,11 @@ sha256_finish (sha256_context *ctx, unsigned char output[32])
while (last < 14)
ctx->wbuf[last++] = 0;
ctx->wbuf[14] = (ctx->total[0] >> 29) | (ctx->total[1] << 3);
ctx->wbuf[15] = ctx->total[0] << 3;
ctx->wbuf[14] = __builtin_bswap32 ((ctx->total[0] >> 29) | (ctx->total[1] << 3));
ctx->wbuf[15] = __builtin_bswap32 (ctx->total[0] << 3);
sha256_process (ctx);
bswap32_buf (ctx->state, SHA256_DIGEST_SIZE >> 2);
memcpy (output, ctx->state, SHA256_DIGEST_SIZE);
memcpy_bswap32 (output, ctx->state, SHA256_DIGEST_SIZE);
memset (ctx, 0, sizeof (sha256_context));
}
@@ -211,7 +212,7 @@ sha256_start (sha256_context *ctx)
void
sha256 (const unsigned char *input, unsigned int ilen,
unsigned char output[32])
unsigned char output[32])
{
sha256_context ctx;