src/usr.bin/ssh/rijndael.c - diff

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Diff for /src/usr.bin/ssh/rijndael.c between version 1.6 and 1.7

version 1.6, 2000/12/09 13:48:31

version 1.7, 2001/02/04 15:32:24

Line 54

#define bswap(x) ((rotl(x, 8) & 0x00ff00ff) | (rotr(x, 8) & 0xff00ff00))

/* Extract byte from a 32 bit quantity (little endian notation) */

#define byte(x,n) ((u1byte)((x) >> (8 * n)))

Line 89

#define f_rn(bo, bi, n, k) \

bo[n] = ft_tab[0][byte(bi[n],0)] ^ \

ft_tab[1][byte(bi[(n + 1) & 3],1)] ^ \

ft_tab[2][byte(bi[(n + 2) & 3],2)] ^ \

ft_tab[3][byte(bi[(n + 3) & 3],3)] ^ *(k + n)

#define i_rn(bo, bi, n, k) \

bo[n] = it_tab[0][byte(bi[n],0)] ^ \

it_tab[1][byte(bi[(n + 3) & 3],1)] ^ \

it_tab[2][byte(bi[(n + 2) & 3],2)] ^ \

it_tab[3][byte(bi[(n + 1) & 3],3)] ^ *(k + n)

#ifdef LARGE_TABLES

Line 109

#define f_rl(bo, bi, n, k) \

bo[n] = fl_tab[0][byte(bi[n],0)] ^ \

fl_tab[1][byte(bi[(n + 1) & 3],1)] ^ \

fl_tab[2][byte(bi[(n + 2) & 3],2)] ^ \

fl_tab[3][byte(bi[(n + 3) & 3],3)] ^ *(k + n)

#define i_rl(bo, bi, n, k) \

bo[n] = il_tab[0][byte(bi[n],0)] ^ \

il_tab[1][byte(bi[(n + 3) & 3],1)] ^ \

il_tab[2][byte(bi[(n + 2) & 3],2)] ^ \

il_tab[3][byte(bi[(n + 1) & 3],3)] ^ *(k + n)

#else

Line 129

#define f_rl(bo, bi, n, k) \

bo[n] = (u4byte)sbx_tab[byte(bi[n],0)] ^ \

rotl(((u4byte)sbx_tab[byte(bi[(n + 1) & 3],1)]), 8) ^ \

rotl(((u4byte)sbx_tab[byte(bi[(n + 2) & 3],2)]), 16) ^ \

rotl(((u4byte)sbx_tab[byte(bi[(n + 3) & 3],3)]), 24) ^ *(k + n)

#define i_rl(bo, bi, n, k) \

bo[n] = (u4byte)isb_tab[byte(bi[n],0)] ^ \

rotl(((u4byte)isb_tab[byte(bi[(n + 3) & 3],1)]), 8) ^ \

rotl(((u4byte)isb_tab[byte(bi[(n + 2) & 3],2)]), 16) ^ \

rotl(((u4byte)isb_tab[byte(bi[(n + 1) & 3],3)]), 24) ^ *(k + n)

#endif

Line 160

log_tab[1] = 0; p = 1;

for(i = 0; i < 10; ++i) {

rco_tab[i] = p;

p = (p << 1) ^ (p & 0x80 ? 0x1b : 0);

}

Line 172

/* least significant end of a byte. */

for(i = 0; i < 256; ++i) {

p = (i ? pow_tab[255 - log_tab[i]] : 0); q = p;

q = (q >> 7) | (q << 1); p ^= q;

q = (q >> 7) | (q << 1); p ^= q ^ 0x63;

sbx_tab[i] = (u1byte)p; isb_tab[p] = (u1byte)i;

}

for(i = 0; i < 256; ++i) {

p = sbx_tab[i];

#ifdef LARGE_TABLES

t = p; fl_tab[0][i] = t;

fl_tab[1][i] = rotl(t, 8);

fl_tab[2][i] = rotl(t, 16);

Line 194

((u4byte)p << 8) |

((u4byte)p << 16) |

((u4byte)ff_mult(3, p) << 24);

ft_tab[0][i] = t;

ft_tab[1][i] = rotl(t, 8);

ft_tab[2][i] = rotl(t, 16);

ft_tab[3][i] = rotl(t, 24);

p = isb_tab[i];

#ifdef LARGE_TABLES

t = p; il_tab[0][i] = t;

il_tab[1][i] = rotl(t, 8);

il_tab[2][i] = rotl(t, 16);

il_tab[3][i] = rotl(t, 24);

#endif

t = ((u4byte)ff_mult(14, p)) |

((u4byte)ff_mult( 9, p) << 8) |

((u4byte)ff_mult(13, p) << 16) |

((u4byte)ff_mult(11, p) << 24);

it_tab[0][i] = t;

it_tab[1][i] = rotl(t, 8);

it_tab[2][i] = rotl(t, 16);

it_tab[3][i] = rotl(t, 24);

}

tab_gen = 1;

Line 232

t = w ^ (x); \

(y) = u ^ v ^ w; \

(y) ^= rotr(u ^ t, 8) ^ \

rotr(v ^ t, 16) ^ \

rotr(t,24)

/* initialise the key schedule from the user supplied key */

Line 271

rijndael_ctx *

rijndael_set_key(rijndael_ctx *ctx, const u4byte *in_key, const u4byte key_len,

int encrypt)

{

u4byte i, t, u, v, w;

u4byte *e_key = ctx->e_key;

u4byte *d_key = ctx->d_key;

Line 285

e_key[0] = io_swap(in_key[0]); e_key[1] = io_swap(in_key[1]);

e_key[2] = io_swap(in_key[2]); e_key[3] = io_swap(in_key[3]);

switch(ctx->k_len) {

case 4: t = e_key[3];

for(i = 0; i < 10; ++i)

loop4(i);

break;

case 6: e_key[4] = io_swap(in_key[4]); t = e_key[5] = io_swap(in_key[5]);

for(i = 0; i < 8; ++i)

loop6(i);

break;

case 8: e_key[4] = io_swap(in_key[4]); e_key[5] = io_swap(in_key[5]);

e_key[6] = io_swap(in_key[6]); t = e_key[7] = io_swap(in_key[7]);

for(i = 0; i < 7; ++i)

loop8(i);

break;

}

if (!encrypt) {

Line 333

void

rijndael_encrypt(rijndael_ctx *ctx, const u4byte *in_blk, u4byte *out_blk)

{

u4byte k_len = ctx->k_len;

u4byte *e_key = ctx->e_key;

u4byte b0[4], b1[4], *kp;

Line 380

void

rijndael_decrypt(rijndael_ctx *ctx, const u4byte *in_blk, u4byte *out_blk)

{

u4byte b0[4], b1[4], *kp;

u4byte k_len = ctx->k_len;

u4byte *e_key = ctx->e_key;