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Import gcrypt public-key cryptography and implement signature checking.

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Vladimir 'phcoder' Serbinenko 2013-01-11 21:32:42 +01:00
parent 535714bdcf
commit 5e3b8dcbb5
238 changed files with 40500 additions and 417 deletions
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91
grub-core/lib/libgcrypt/cipher/sha256.c
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@ -1,5 +1,5 @@
/* sha256.c - SHA256 hash function
* Copyright (C) 2003, 2006, 2008 Free Software Foundation, Inc.
* Copyright (C) 2003, 2006, 2008, 2009 Free Software Foundation, Inc.
*
* This file is part of Libgcrypt.
*
@ -41,7 +41,6 @@
#include <string.h>
#include "g10lib.h"
#include "memory.h"
#include "bithelp.h"
#include "cipher.h"
#include "hash-common.h"
@ -95,10 +94,6 @@ sha224_init (void *context)
/*
Transform the message X which consists of 16 32-bit-words. See FIPS
180-2 for details. */
#define Cho(x,y,z) (z ^ (x & (y ^ z))) /* (4.2) same as SHA-1's F1 */
#define Maj(x,y,z) ((x & y) | (z & (x|y))) /* (4.3) same as SHA-1's F3 */
#define Sum0(x) (ror ((x), 2) ^ ror ((x), 13) ^ ror ((x), 22)) /* (4.4) */
#define Sum1(x) (ror ((x), 6) ^ ror ((x), 11) ^ ror ((x), 25)) /* (4.5) */
#define S0(x) (ror ((x), 7) ^ ror ((x), 18) ^ ((x) >> 3)) /* (4.6) */
#define S1(x) (ror ((x), 17) ^ ror ((x), 19) ^ ((x) >> 10)) /* (4.7) */
#define R(a,b,c,d,e,f,g,h,k,w) do \
@ -114,6 +109,35 @@ sha224_init (void *context)
b = a; \
a = t1 + t2; \
} while (0)
/* (4.2) same as SHA-1's F1. */
static inline u32
Cho (u32 x, u32 y, u32 z)
{
return (z ^ (x & (y ^ z)));
}
/* (4.3) same as SHA-1's F3 */
static inline u32
Maj (u32 x, u32 y, u32 z)
{
return ((x & y) | (z & (x|y)));
}
/* (4.4) */
static inline u32
Sum0 (u32 x)
{
return (ror (x, 2) ^ ror (x, 13) ^ ror (x, 22));
}
/* (4.5) */
static inline u32
Sum1 (u32 x)
{
return (ror (x, 6) ^ ror (x, 11) ^ ror (x, 25));
}
static void
transform (SHA256_CONTEXT *hd, const unsigned char *data)
@ -172,8 +196,55 @@ transform (SHA256_CONTEXT *hd, const unsigned char *data)
for (; i < 64; i++)
w[i] = S1(w[i-2]) + w[i-7] + S0(w[i-15]) + w[i-16];
for (i=0; i < 64; i++)
R(a,b,c,d,e,f,g,h,K[i],w[i]);
for (i=0; i < 64;)
{
#if 0
R(a,b,c,d,e,f,g,h,K[i],w[i]);
i++;
#else
t1 = h + Sum1 (e) + Cho (e, f, g) + K[i] + w[i];
t2 = Sum0 (a) + Maj (a, b, c);
d += t1;
h = t1 + t2;
t1 = g + Sum1 (d) + Cho (d, e, f) + K[i+1] + w[i+1];
t2 = Sum0 (h) + Maj (h, a, b);
c += t1;
g = t1 + t2;
t1 = f + Sum1 (c) + Cho (c, d, e) + K[i+2] + w[i+2];
t2 = Sum0 (g) + Maj (g, h, a);
b += t1;
f = t1 + t2;
t1 = e + Sum1 (b) + Cho (b, c, d) + K[i+3] + w[i+3];
t2 = Sum0 (f) + Maj (f, g, h);
a += t1;
e = t1 + t2;
t1 = d + Sum1 (a) + Cho (a, b, c) + K[i+4] + w[i+4];
t2 = Sum0 (e) + Maj (e, f, g);
h += t1;
d = t1 + t2;
t1 = c + Sum1 (h) + Cho (h, a, b) + K[i+5] + w[i+5];
t2 = Sum0 (d) + Maj (d, e, f);
g += t1;
c = t1 + t2;
t1 = b + Sum1 (g) + Cho (g, h, a) + K[i+6] + w[i+6];
t2 = Sum0 (c) + Maj (c, d, e);
f += t1;
b = t1 + t2;
t1 = a + Sum1 (f) + Cho (f, g, h) + K[i+7] + w[i+7];
t2 = Sum0 (b) + Maj (b, c, d);
e += t1;
a = t1 + t2;
i += 8;
#endif
}
hd->h0 += a;
hd->h1 += b;
@ -184,10 +255,6 @@ transform (SHA256_CONTEXT *hd, const unsigned char *data)
hd->h6 += g;
hd->h7 += h;
}
#undef Cho
#undef Maj
#undef Sum0
#undef Sum1
#undef S0
#undef S1
#undef R