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This commit is contained in:
Zhi Guan
2015-08-15 15:02:15 +08:00
parent 06df2fab54
commit 3bdc0ea895
2536 changed files with 417052 additions and 271997 deletions
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405
engines/ccgost/gosthash.c
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@@ -11,8 +11,8 @@
#include "gost89.h"
#include "gosthash.h"
/* Use OPENSSL_malloc for memory allocation if compiled with
/*
* Use OPENSSL_malloc for memory allocation if compiled with
* -DOPENSSL_BUILD, and libc malloc otherwise
*/
#ifndef MYALLOC
@@ -25,231 +25,244 @@
# define MYFREE(ptr) free(ptr)
# endif
#endif
/* Following functions are various bit meshing routines used in
* GOST R 34.11-94 algorithms */
static void swap_bytes (byte *w, byte *k)
{
int i,j;
for (i=0;i<4;i++)
for (j=0;j<8;j++)
k[i+4*j]=w[8*i+j];
/*
* Following functions are various bit meshing routines used in GOST R
* 34.11-94 algorithms
*/
static void swap_bytes(byte * w, byte * k)
{
int i, j;
for (i = 0; i < 4; i++)
for (j = 0; j < 8; j++)
k[i + 4 * j] = w[8 * i + j];
}
}
/* was A_A */
static void circle_xor8 (const byte *w, byte *k)
{
byte buf[8];
int i;
memcpy(buf,w,8);
memcpy(k,w+8,24);
for(i=0;i<8;i++)
k[i+24]=buf[i]^k[i];
}
static void circle_xor8(const byte * w, byte * k)
{
byte buf[8];
int i;
memcpy(buf, w, 8);
memmove(k, w + 8, 24);
for (i = 0; i < 8; i++)
k[i + 24] = buf[i] ^ k[i];
}
/* was R_R */
static void transform_3 (byte *data)
{
unsigned short int acc;
acc=(data[0]^data[2]^data[4]^data[6]^data[24]^data[30])|
((data[1]^data[3]^data[5]^data[7]^data[25]^data[31])<<8);
memmove(data,data+2,30);
data[30]=acc&0xff;
data[31]=acc>>8;
}
static void transform_3(byte * data)
{
unsigned short int acc;
acc = (data[0] ^ data[2] ^ data[4] ^ data[6] ^ data[24] ^ data[30]) |
((data[1] ^ data[3] ^ data[5] ^ data[7] ^ data[25] ^ data[31]) << 8);
memmove(data, data + 2, 30);
data[30] = acc & 0xff;
data[31] = acc >> 8;
}
/* Adds blocks of N bytes modulo 2**(8*n). Returns carry*/
static int add_blocks(int n,byte *left, const byte *right)
{
int i;
int carry=0;
int sum;
for (i=0;i<n;i++)
{
sum=(int)left[i]+(int)right[i]+carry;
left[i]=sum & 0xff;
carry=sum>>8;
}
return carry;
}
static int add_blocks(int n, byte * left, const byte * right)
{
int i;
int carry = 0;
int sum;
for (i = 0; i < n; i++) {
sum = (int)left[i] + (int)right[i] + carry;
left[i] = sum & 0xff;
carry = sum >> 8;
}
return carry;
}
/* Xor two sequences of bytes */
static void xor_blocks (byte *result,const byte *a,const byte *b,size_t len)
{
size_t i;
for (i=0;i<len;i++) result[i]=a[i]^b[i];
}
static void xor_blocks(byte * result, const byte * a, const byte * b,
size_t len)
{
size_t i;
for (i = 0; i < len; i++)
result[i] = a[i] ^ b[i];
}
/*
* Calculate H(i+1) = Hash(Hi,Mi)
* Where H and M are 32 bytes long
/*
* Calculate H(i+1) = Hash(Hi,Mi)
* Where H and M are 32 bytes long
*/
static int hash_step(gost_ctx *c,byte *H,const byte *M)
{
byte U[32],W[32],V[32],S[32],Key[32];
int i;
/* Compute first key */
xor_blocks(W,H,M,32);
swap_bytes(W,Key);
/* Encrypt first 8 bytes of H with first key*/
gost_enc_with_key(c,Key,H,S);
/* Compute second key*/
circle_xor8(H,U);
circle_xor8(M,V);
circle_xor8(V,V);
xor_blocks(W,U,V,32);
swap_bytes(W,Key);
/* encrypt second 8 bytes of H with second key*/
gost_enc_with_key(c,Key,H+8,S+8);
/* compute third key */
circle_xor8(U,U);
U[31]=~U[31]; U[29]=~U[29]; U[28]=~U[28]; U[24]=~U[24];
U[23]=~U[23]; U[20]=~U[20]; U[18]=~U[18]; U[17]=~U[17];
U[14]=~U[14]; U[12]=~U[12]; U[10]=~U[10]; U[ 8]=~U[ 8];
U[ 7]=~U[ 7]; U[ 5]=~U[ 5]; U[ 3]=~U[ 3]; U[ 1]=~U[ 1];
circle_xor8(V,V);
circle_xor8(V,V);
xor_blocks(W,U,V,32);
swap_bytes(W,Key);
/* encrypt third 8 bytes of H with third key*/
gost_enc_with_key(c,Key,H+16,S+16);
/* Compute fourth key */
circle_xor8(U,U);
circle_xor8(V,V);
circle_xor8(V,V);
xor_blocks(W,U,V,32);
swap_bytes(W,Key);
/* Encrypt last 8 bytes with fourth key */
gost_enc_with_key(c,Key,H+24,S+24);
for (i=0;i<12;i++)
transform_3(S);
xor_blocks(S,S,M,32);
transform_3(S);
xor_blocks(S,S,H,32);
for (i=0;i<61;i++)
transform_3(S);
memcpy(H,S,32);
return 1;
}
static int hash_step(gost_ctx * c, byte * H, const byte * M)
{
byte U[32], W[32], V[32], S[32], Key[32];
int i;
/* Compute first key */
xor_blocks(W, H, M, 32);
swap_bytes(W, Key);
/* Encrypt first 8 bytes of H with first key */
gost_enc_with_key(c, Key, H, S);
/* Compute second key */
circle_xor8(H, U);
circle_xor8(M, V);
circle_xor8(V, V);
xor_blocks(W, U, V, 32);
swap_bytes(W, Key);
/* encrypt second 8 bytes of H with second key */
gost_enc_with_key(c, Key, H + 8, S + 8);
/* compute third key */
circle_xor8(U, U);
U[31] = ~U[31];
U[29] = ~U[29];
U[28] = ~U[28];
U[24] = ~U[24];
U[23] = ~U[23];
U[20] = ~U[20];
U[18] = ~U[18];
U[17] = ~U[17];
U[14] = ~U[14];
U[12] = ~U[12];
U[10] = ~U[10];
U[8] = ~U[8];
U[7] = ~U[7];
U[5] = ~U[5];
U[3] = ~U[3];
U[1] = ~U[1];
circle_xor8(V, V);
circle_xor8(V, V);
xor_blocks(W, U, V, 32);
swap_bytes(W, Key);
/* encrypt third 8 bytes of H with third key */
gost_enc_with_key(c, Key, H + 16, S + 16);
/* Compute fourth key */
circle_xor8(U, U);
circle_xor8(V, V);
circle_xor8(V, V);
xor_blocks(W, U, V, 32);
swap_bytes(W, Key);
/* Encrypt last 8 bytes with fourth key */
gost_enc_with_key(c, Key, H + 24, S + 24);
for (i = 0; i < 12; i++)
transform_3(S);
xor_blocks(S, S, M, 32);
transform_3(S);
xor_blocks(S, S, H, 32);
for (i = 0; i < 61; i++)
transform_3(S);
memcpy(H, S, 32);
return 1;
}
/* Initialize gost_hash ctx - cleans up temporary structures and
* set up substitution blocks
/*
* Initialize gost_hash ctx - cleans up temporary structures and set up
* substitution blocks
*/
int init_gost_hash_ctx(gost_hash_ctx *ctx, const gost_subst_block *subst_block)
{
memset(ctx,0,sizeof(gost_hash_ctx));
ctx->cipher_ctx = (gost_ctx *)MYALLOC(sizeof(gost_ctx));
if (!ctx->cipher_ctx)
{
return 0;
}
gost_init(ctx->cipher_ctx,subst_block);
return 1;
}
int init_gost_hash_ctx(gost_hash_ctx * ctx,
const gost_subst_block * subst_block)
{
memset(ctx, 0, sizeof(gost_hash_ctx));
ctx->cipher_ctx = (gost_ctx *) MYALLOC(sizeof(gost_ctx));
if (!ctx->cipher_ctx) {
return 0;
}
gost_init(ctx->cipher_ctx, subst_block);
return 1;
}
/*
* Free cipher CTX if it is dynamically allocated. Do not use
* if cipher ctx is statically allocated as in OpenSSL implementation of
* GOST hash algroritm
*
*/
void done_gost_hash_ctx(gost_hash_ctx *ctx)
{
/* No need to use gost_destroy, because cipher keys are not really
* secret when hashing */
MYFREE(ctx->cipher_ctx);
}
*/
void done_gost_hash_ctx(gost_hash_ctx * ctx)
{
/*
* No need to use gost_destroy, because cipher keys are not really secret
* when hashing
*/
MYFREE(ctx->cipher_ctx);
}
/*
* reset state of hash context to begin hashing new message
*/
int start_hash(gost_hash_ctx *ctx)
{
if (!ctx->cipher_ctx) return 0;
memset(&(ctx->H),0,32);
memset(&(ctx->S),0,32);
ctx->len = 0L;
ctx->left=0;
return 1;
}
int start_hash(gost_hash_ctx * ctx)
{
if (!ctx->cipher_ctx)
return 0;
memset(&(ctx->H), 0, 32);
memset(&(ctx->S), 0, 32);
ctx->len = 0L;
ctx->left = 0;
return 1;
}
/*
* Hash block of arbitrary length
*
*
*/
int hash_block(gost_hash_ctx *ctx,const byte *block, size_t length)
{
const byte *curptr=block;
const byte *barrier=block+(length-32);/* Last byte we can safely hash*/
if (ctx->left)
{
/*There are some bytes from previous step*/
unsigned int add_bytes = 32-ctx->left;
if (add_bytes>length)
{
add_bytes = length;
}
memcpy(&(ctx->remainder[ctx->left]),block,add_bytes);
ctx->left+=add_bytes;
if (ctx->left<32)
{
return 1;
}
curptr=block+add_bytes;
hash_step(ctx->cipher_ctx,ctx->H,ctx->remainder);
add_blocks(32,ctx->S,ctx->remainder);
ctx->len+=32;
ctx->left=0;
}
while (curptr<=barrier)
{
hash_step(ctx->cipher_ctx,ctx->H,curptr);
add_blocks(32,ctx->S,curptr);
ctx->len+=32;
curptr+=32;
}
if (curptr!=block+length)
{
ctx->left=block+length-curptr;
memcpy(ctx->remainder,curptr,ctx->left);
}
return 1;
}
int hash_block(gost_hash_ctx * ctx, const byte * block, size_t length)
{
if (ctx->left) {
/*
* There are some bytes from previous step
*/
unsigned int add_bytes = 32 - ctx->left;
if (add_bytes > length) {
add_bytes = length;
}
memcpy(&(ctx->remainder[ctx->left]), block, add_bytes);
ctx->left += add_bytes;
if (ctx->left < 32) {
return 1;
}
block += add_bytes;
length -= add_bytes;
hash_step(ctx->cipher_ctx, ctx->H, ctx->remainder);
add_blocks(32, ctx->S, ctx->remainder);
ctx->len += 32;
ctx->left = 0;
}
while (length >= 32) {
hash_step(ctx->cipher_ctx, ctx->H, block);
add_blocks(32, ctx->S, block);
ctx->len += 32;
block += 32;
length -= 32;
}
if (length) {
memcpy(ctx->remainder, block, ctx->left = length);
}
return 1;
}
/*
* Compute hash value from current state of ctx
* state of hash ctx becomes invalid and cannot be used for further
* hashing.
*/
int finish_hash(gost_hash_ctx *ctx,byte *hashval)
{
byte buf[32];
byte H[32];
byte S[32];
ghosthash_len fin_len=ctx->len;
byte *bptr;
memcpy(H,ctx->H,32);
memcpy(S,ctx->S,32);
if (ctx->left)
{
memset(buf,0,32);
memcpy(buf,ctx->remainder,ctx->left);
hash_step(ctx->cipher_ctx,H,buf);
add_blocks(32,S,buf);
fin_len+=ctx->left;
}
memset(buf,0,32);
bptr=buf;
fin_len<<=3; /* Hash length in BITS!!*/
while(fin_len>0)
{
*(bptr++)=(byte)(fin_len&0xFF);
fin_len>>=8;
};
hash_step(ctx->cipher_ctx,H,buf);
hash_step(ctx->cipher_ctx,H,S);
memcpy(hashval,H,32);
return 1;
}
*/
int finish_hash(gost_hash_ctx * ctx, byte * hashval)
{
byte buf[32];
byte H[32];
byte S[32];
ghosthash_len fin_len = ctx->len;
byte *bptr;
memcpy(H, ctx->H, 32);
memcpy(S, ctx->S, 32);
if (ctx->left) {
memset(buf, 0, 32);
memcpy(buf, ctx->remainder, ctx->left);
hash_step(ctx->cipher_ctx, H, buf);
add_blocks(32, S, buf);
fin_len += ctx->left;
}
memset(buf, 0, 32);
bptr = buf;
fin_len <<= 3; /* Hash length in BITS!! */
while (fin_len > 0) {
*(bptr++) = (byte) (fin_len & 0xFF);
fin_len >>= 8;
};
hash_step(ctx->cipher_ctx, H, buf);
hash_step(ctx->cipher_ctx, H, S);
memcpy(hashval, H, 32);
return 1;
}