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04e15c69d2
This was not changed in HEAD, but will be done later as part of a pgindent run. Future pgindent runs will also do this. Report by Tom Lane Backpatch through all supported branches, but not HEAD
678 lines
14 KiB
C
678 lines
14 KiB
C
/* $OpenBSD: rijndael.c,v 1.6 2000/12/09 18:51:34 markus Exp $ */
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/* contrib/pgcrypto/rijndael.c */
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/* This is an independent implementation of the encryption algorithm: */
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/* */
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/* RIJNDAEL by Joan Daemen and Vincent Rijmen */
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/* */
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/* which is a candidate algorithm in the Advanced Encryption Standard */
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/* programme of the US National Institute of Standards and Technology. */
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/* */
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/* Copyright in this implementation is held by Dr B R Gladman but I */
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/* hereby give permission for its free direct or derivative use subject */
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/* to acknowledgment of its origin and compliance with any conditions */
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/* that the originators of the algorithm place on its exploitation. */
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/* */
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/* Dr Brian Gladman (gladman@seven77.demon.co.uk) 14th January 1999 */
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/* Timing data for Rijndael (rijndael.c)
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Algorithm: rijndael (rijndael.c)
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128 bit key:
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Key Setup: 305/1389 cycles (encrypt/decrypt)
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Encrypt: 374 cycles = 68.4 mbits/sec
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Decrypt: 352 cycles = 72.7 mbits/sec
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Mean: 363 cycles = 70.5 mbits/sec
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192 bit key:
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Key Setup: 277/1595 cycles (encrypt/decrypt)
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Encrypt: 439 cycles = 58.3 mbits/sec
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Decrypt: 425 cycles = 60.2 mbits/sec
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Mean: 432 cycles = 59.3 mbits/sec
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256 bit key:
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Key Setup: 374/1960 cycles (encrypt/decrypt)
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Encrypt: 502 cycles = 51.0 mbits/sec
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Decrypt: 498 cycles = 51.4 mbits/sec
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Mean: 500 cycles = 51.2 mbits/sec
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*/
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#include "postgres.h"
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#include <sys/param.h>
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#include "px.h"
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#include "rijndael.h"
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#define PRE_CALC_TABLES
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#define LARGE_TABLES
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static void gen_tabs(void);
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/* 3. Basic macros for speeding up generic operations */
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/* Circular rotate of 32 bit values */
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#define rotr(x,n) (((x) >> ((int)(n))) | ((x) << (32 - (int)(n))))
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#define rotl(x,n) (((x) << ((int)(n))) | ((x) >> (32 - (int)(n))))
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/* Invert byte order in a 32 bit variable */
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#define bswap(x) ((rotl((x), 8) & 0x00ff00ff) | (rotr((x), 8) & 0xff00ff00))
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/* Extract byte from a 32 bit quantity (little endian notation) */
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#define byte(x,n) ((u1byte)((x) >> (8 * (n))))
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#ifdef WORDS_BIGENDIAN
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#define io_swap(x) bswap(x)
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#else
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#define io_swap(x) (x)
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#endif
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#ifdef PRINT_TABS
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#undef PRE_CALC_TABLES
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#endif
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#ifdef PRE_CALC_TABLES
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#include "rijndael.tbl"
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#define tab_gen 1
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#else /* !PRE_CALC_TABLES */
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static u1byte pow_tab[256];
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static u1byte log_tab[256];
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static u1byte sbx_tab[256];
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static u1byte isb_tab[256];
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static u4byte rco_tab[10];
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static u4byte ft_tab[4][256];
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static u4byte it_tab[4][256];
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#ifdef LARGE_TABLES
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static u4byte fl_tab[4][256];
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static u4byte il_tab[4][256];
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#endif
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static u4byte tab_gen = 0;
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#endif /* !PRE_CALC_TABLES */
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#define ff_mult(a,b) ((a) && (b) ? pow_tab[(log_tab[a] + log_tab[b]) % 255] : 0)
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#define f_rn(bo, bi, n, k) \
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(bo)[n] = ft_tab[0][byte((bi)[n],0)] ^ \
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ft_tab[1][byte((bi)[((n) + 1) & 3],1)] ^ \
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ft_tab[2][byte((bi)[((n) + 2) & 3],2)] ^ \
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ft_tab[3][byte((bi)[((n) + 3) & 3],3)] ^ *((k) + (n))
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#define i_rn(bo, bi, n, k) \
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(bo)[n] = it_tab[0][byte((bi)[n],0)] ^ \
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it_tab[1][byte((bi)[((n) + 3) & 3],1)] ^ \
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it_tab[2][byte((bi)[((n) + 2) & 3],2)] ^ \
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it_tab[3][byte((bi)[((n) + 1) & 3],3)] ^ *((k) + (n))
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#ifdef LARGE_TABLES
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#define ls_box(x) \
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( fl_tab[0][byte(x, 0)] ^ \
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fl_tab[1][byte(x, 1)] ^ \
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fl_tab[2][byte(x, 2)] ^ \
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fl_tab[3][byte(x, 3)] )
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#define f_rl(bo, bi, n, k) \
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(bo)[n] = fl_tab[0][byte((bi)[n],0)] ^ \
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fl_tab[1][byte((bi)[((n) + 1) & 3],1)] ^ \
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fl_tab[2][byte((bi)[((n) + 2) & 3],2)] ^ \
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fl_tab[3][byte((bi)[((n) + 3) & 3],3)] ^ *((k) + (n))
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#define i_rl(bo, bi, n, k) \
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(bo)[n] = il_tab[0][byte((bi)[n],0)] ^ \
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il_tab[1][byte((bi)[((n) + 3) & 3],1)] ^ \
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il_tab[2][byte((bi)[((n) + 2) & 3],2)] ^ \
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il_tab[3][byte((bi)[((n) + 1) & 3],3)] ^ *((k) + (n))
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#else
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#define ls_box(x) \
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((u4byte)sbx_tab[byte(x, 0)] << 0) ^ \
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((u4byte)sbx_tab[byte(x, 1)] << 8) ^ \
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((u4byte)sbx_tab[byte(x, 2)] << 16) ^ \
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((u4byte)sbx_tab[byte(x, 3)] << 24)
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#define f_rl(bo, bi, n, k) \
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(bo)[n] = (u4byte)sbx_tab[byte((bi)[n],0)] ^ \
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rotl(((u4byte)sbx_tab[byte((bi)[((n) + 1) & 3],1)]), 8) ^ \
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rotl(((u4byte)sbx_tab[byte((bi)[((n) + 2) & 3],2)]), 16) ^ \
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rotl(((u4byte)sbx_tab[byte((bi)[((n) + 3) & 3],3)]), 24) ^ *((k) + (n))
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#define i_rl(bo, bi, n, k) \
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(bo)[n] = (u4byte)isb_tab[byte((bi)[n],0)] ^ \
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rotl(((u4byte)isb_tab[byte((bi)[((n) + 3) & 3],1)]), 8) ^ \
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rotl(((u4byte)isb_tab[byte((bi)[((n) + 2) & 3],2)]), 16) ^ \
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rotl(((u4byte)isb_tab[byte((bi)[((n) + 1) & 3],3)]), 24) ^ *((k) + (n))
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#endif
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static void
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gen_tabs(void)
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{
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#ifndef PRE_CALC_TABLES
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u4byte i,
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t;
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u1byte p,
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q;
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/* log and power tables for GF(2**8) finite field with */
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/* 0x11b as modular polynomial - the simplest prmitive */
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/* root is 0x11, used here to generate the tables */
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for (i = 0, p = 1; i < 256; ++i)
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{
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pow_tab[i] = (u1byte) p;
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log_tab[p] = (u1byte) i;
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p = p ^ (p << 1) ^ (p & 0x80 ? 0x01b : 0);
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}
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log_tab[1] = 0;
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p = 1;
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for (i = 0; i < 10; ++i)
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{
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rco_tab[i] = p;
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p = (p << 1) ^ (p & 0x80 ? 0x1b : 0);
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}
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/* note that the affine byte transformation matrix in */
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/* rijndael specification is in big endian format with */
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/* bit 0 as the most significant bit. In the remainder */
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/* of the specification the bits are numbered from the */
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/* least significant end of a byte. */
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for (i = 0; i < 256; ++i)
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{
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p = (i ? pow_tab[255 - log_tab[i]] : 0);
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q = p;
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q = (q >> 7) | (q << 1);
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p ^= q;
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q = (q >> 7) | (q << 1);
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p ^= q;
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q = (q >> 7) | (q << 1);
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p ^= q;
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q = (q >> 7) | (q << 1);
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p ^= q ^ 0x63;
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sbx_tab[i] = (u1byte) p;
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isb_tab[p] = (u1byte) i;
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}
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for (i = 0; i < 256; ++i)
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{
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p = sbx_tab[i];
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#ifdef LARGE_TABLES
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t = p;
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fl_tab[0][i] = t;
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fl_tab[1][i] = rotl(t, 8);
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fl_tab[2][i] = rotl(t, 16);
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fl_tab[3][i] = rotl(t, 24);
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#endif
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t = ((u4byte) ff_mult(2, p)) |
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((u4byte) p << 8) |
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((u4byte) p << 16) |
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((u4byte) ff_mult(3, p) << 24);
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ft_tab[0][i] = t;
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ft_tab[1][i] = rotl(t, 8);
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ft_tab[2][i] = rotl(t, 16);
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ft_tab[3][i] = rotl(t, 24);
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p = isb_tab[i];
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#ifdef LARGE_TABLES
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t = p;
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il_tab[0][i] = t;
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il_tab[1][i] = rotl(t, 8);
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il_tab[2][i] = rotl(t, 16);
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il_tab[3][i] = rotl(t, 24);
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#endif
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t = ((u4byte) ff_mult(14, p)) |
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((u4byte) ff_mult(9, p) << 8) |
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((u4byte) ff_mult(13, p) << 16) |
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((u4byte) ff_mult(11, p) << 24);
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it_tab[0][i] = t;
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it_tab[1][i] = rotl(t, 8);
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it_tab[2][i] = rotl(t, 16);
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it_tab[3][i] = rotl(t, 24);
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}
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tab_gen = 1;
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#endif /* !PRE_CALC_TABLES */
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}
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#define star_x(x) (((x) & 0x7f7f7f7f) << 1) ^ ((((x) & 0x80808080) >> 7) * 0x1b)
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#define imix_col(y,x) \
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do { \
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u = star_x(x); \
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v = star_x(u); \
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w = star_x(v); \
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t = w ^ (x); \
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(y) = u ^ v ^ w; \
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(y) ^= rotr(u ^ t, 8) ^ \
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rotr(v ^ t, 16) ^ \
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rotr(t,24); \
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} while (0)
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/* initialise the key schedule from the user supplied key */
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#define loop4(i) \
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do { t = ls_box(rotr(t, 8)) ^ rco_tab[i]; \
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t ^= e_key[4 * i]; e_key[4 * i + 4] = t; \
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t ^= e_key[4 * i + 1]; e_key[4 * i + 5] = t; \
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t ^= e_key[4 * i + 2]; e_key[4 * i + 6] = t; \
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t ^= e_key[4 * i + 3]; e_key[4 * i + 7] = t; \
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} while (0)
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#define loop6(i) \
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do { t = ls_box(rotr(t, 8)) ^ rco_tab[i]; \
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t ^= e_key[6 * (i)]; e_key[6 * (i) + 6] = t; \
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t ^= e_key[6 * (i) + 1]; e_key[6 * (i) + 7] = t; \
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t ^= e_key[6 * (i) + 2]; e_key[6 * (i) + 8] = t; \
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t ^= e_key[6 * (i) + 3]; e_key[6 * (i) + 9] = t; \
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t ^= e_key[6 * (i) + 4]; e_key[6 * (i) + 10] = t; \
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t ^= e_key[6 * (i) + 5]; e_key[6 * (i) + 11] = t; \
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} while (0)
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#define loop8(i) \
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do { t = ls_box(rotr(t, 8)) ^ rco_tab[i]; \
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t ^= e_key[8 * (i)]; e_key[8 * (i) + 8] = t; \
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t ^= e_key[8 * (i) + 1]; e_key[8 * (i) + 9] = t; \
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t ^= e_key[8 * (i) + 2]; e_key[8 * (i) + 10] = t; \
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t ^= e_key[8 * (i) + 3]; e_key[8 * (i) + 11] = t; \
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t = e_key[8 * (i) + 4] ^ ls_box(t); \
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e_key[8 * (i) + 12] = t; \
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t ^= e_key[8 * (i) + 5]; e_key[8 * (i) + 13] = t; \
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t ^= e_key[8 * (i) + 6]; e_key[8 * (i) + 14] = t; \
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t ^= e_key[8 * (i) + 7]; e_key[8 * (i) + 15] = t; \
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} while (0)
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rijndael_ctx *
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rijndael_set_key(rijndael_ctx *ctx, const u4byte *in_key, const u4byte key_len,
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int encrypt)
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{
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u4byte i,
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t,
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u,
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v,
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w;
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u4byte *e_key = ctx->e_key;
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u4byte *d_key = ctx->d_key;
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ctx->decrypt = !encrypt;
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if (!tab_gen)
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gen_tabs();
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ctx->k_len = (key_len + 31) / 32;
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e_key[0] = io_swap(in_key[0]);
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e_key[1] = io_swap(in_key[1]);
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e_key[2] = io_swap(in_key[2]);
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e_key[3] = io_swap(in_key[3]);
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switch (ctx->k_len)
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{
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case 4:
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t = e_key[3];
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for (i = 0; i < 10; ++i)
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loop4(i);
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break;
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case 6:
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e_key[4] = io_swap(in_key[4]);
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t = e_key[5] = io_swap(in_key[5]);
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for (i = 0; i < 8; ++i)
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loop6(i);
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break;
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case 8:
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e_key[4] = io_swap(in_key[4]);
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e_key[5] = io_swap(in_key[5]);
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e_key[6] = io_swap(in_key[6]);
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t = e_key[7] = io_swap(in_key[7]);
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for (i = 0; i < 7; ++i)
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loop8(i);
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break;
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}
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if (!encrypt)
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{
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d_key[0] = e_key[0];
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d_key[1] = e_key[1];
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d_key[2] = e_key[2];
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d_key[3] = e_key[3];
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for (i = 4; i < 4 * ctx->k_len + 24; ++i)
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imix_col(d_key[i], e_key[i]);
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}
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return ctx;
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}
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/* encrypt a block of text */
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#define f_nround(bo, bi, k) \
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do { \
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f_rn(bo, bi, 0, k); \
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f_rn(bo, bi, 1, k); \
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f_rn(bo, bi, 2, k); \
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f_rn(bo, bi, 3, k); \
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k += 4; \
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} while (0)
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#define f_lround(bo, bi, k) \
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do { \
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f_rl(bo, bi, 0, k); \
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f_rl(bo, bi, 1, k); \
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f_rl(bo, bi, 2, k); \
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f_rl(bo, bi, 3, k); \
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} while (0)
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void
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rijndael_encrypt(rijndael_ctx *ctx, const u4byte *in_blk, u4byte *out_blk)
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{
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u4byte k_len = ctx->k_len;
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u4byte *e_key = ctx->e_key;
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u4byte b0[4],
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b1[4],
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*kp;
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b0[0] = io_swap(in_blk[0]) ^ e_key[0];
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b0[1] = io_swap(in_blk[1]) ^ e_key[1];
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b0[2] = io_swap(in_blk[2]) ^ e_key[2];
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b0[3] = io_swap(in_blk[3]) ^ e_key[3];
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kp = e_key + 4;
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if (k_len > 6)
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{
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f_nround(b1, b0, kp);
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f_nround(b0, b1, kp);
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}
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if (k_len > 4)
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{
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f_nround(b1, b0, kp);
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f_nround(b0, b1, kp);
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}
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f_nround(b1, b0, kp);
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f_nround(b0, b1, kp);
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f_nround(b1, b0, kp);
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f_nround(b0, b1, kp);
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f_nround(b1, b0, kp);
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f_nround(b0, b1, kp);
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f_nround(b1, b0, kp);
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f_nround(b0, b1, kp);
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f_nround(b1, b0, kp);
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f_lround(b0, b1, kp);
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out_blk[0] = io_swap(b0[0]);
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out_blk[1] = io_swap(b0[1]);
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out_blk[2] = io_swap(b0[2]);
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out_blk[3] = io_swap(b0[3]);
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}
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/* decrypt a block of text */
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#define i_nround(bo, bi, k) \
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do { \
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i_rn(bo, bi, 0, k); \
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i_rn(bo, bi, 1, k); \
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i_rn(bo, bi, 2, k); \
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i_rn(bo, bi, 3, k); \
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k -= 4; \
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} while (0)
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#define i_lround(bo, bi, k) \
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do { \
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i_rl(bo, bi, 0, k); \
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i_rl(bo, bi, 1, k); \
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i_rl(bo, bi, 2, k); \
|
|
i_rl(bo, bi, 3, k); \
|
|
} while (0)
|
|
|
|
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;
|
|
u4byte *d_key = ctx->d_key;
|
|
|
|
b0[0] = io_swap(in_blk[0]) ^ e_key[4 * k_len + 24];
|
|
b0[1] = io_swap(in_blk[1]) ^ e_key[4 * k_len + 25];
|
|
b0[2] = io_swap(in_blk[2]) ^ e_key[4 * k_len + 26];
|
|
b0[3] = io_swap(in_blk[3]) ^ e_key[4 * k_len + 27];
|
|
|
|
kp = d_key + 4 * (k_len + 5);
|
|
|
|
if (k_len > 6)
|
|
{
|
|
i_nround(b1, b0, kp);
|
|
i_nround(b0, b1, kp);
|
|
}
|
|
|
|
if (k_len > 4)
|
|
{
|
|
i_nround(b1, b0, kp);
|
|
i_nround(b0, b1, kp);
|
|
}
|
|
|
|
i_nround(b1, b0, kp);
|
|
i_nround(b0, b1, kp);
|
|
i_nround(b1, b0, kp);
|
|
i_nround(b0, b1, kp);
|
|
i_nround(b1, b0, kp);
|
|
i_nround(b0, b1, kp);
|
|
i_nround(b1, b0, kp);
|
|
i_nround(b0, b1, kp);
|
|
i_nround(b1, b0, kp);
|
|
i_lround(b0, b1, kp);
|
|
|
|
out_blk[0] = io_swap(b0[0]);
|
|
out_blk[1] = io_swap(b0[1]);
|
|
out_blk[2] = io_swap(b0[2]);
|
|
out_blk[3] = io_swap(b0[3]);
|
|
}
|
|
|
|
/*
|
|
* conventional interface
|
|
*
|
|
* ATM it hopes all data is 4-byte aligned - which
|
|
* should be true for PX. -marko
|
|
*/
|
|
|
|
void
|
|
aes_set_key(rijndael_ctx *ctx, const uint8 *key, unsigned keybits, int enc)
|
|
{
|
|
uint32 *k;
|
|
|
|
k = (uint32 *) key;
|
|
rijndael_set_key(ctx, k, keybits, enc);
|
|
}
|
|
|
|
void
|
|
aes_ecb_encrypt(rijndael_ctx *ctx, uint8 *data, unsigned len)
|
|
{
|
|
unsigned bs = 16;
|
|
uint32 *d;
|
|
|
|
while (len >= bs)
|
|
{
|
|
d = (uint32 *) data;
|
|
rijndael_encrypt(ctx, d, d);
|
|
|
|
len -= bs;
|
|
data += bs;
|
|
}
|
|
}
|
|
|
|
void
|
|
aes_ecb_decrypt(rijndael_ctx *ctx, uint8 *data, unsigned len)
|
|
{
|
|
unsigned bs = 16;
|
|
uint32 *d;
|
|
|
|
while (len >= bs)
|
|
{
|
|
d = (uint32 *) data;
|
|
rijndael_decrypt(ctx, d, d);
|
|
|
|
len -= bs;
|
|
data += bs;
|
|
}
|
|
}
|
|
|
|
void
|
|
aes_cbc_encrypt(rijndael_ctx *ctx, uint8 *iva, uint8 *data, unsigned len)
|
|
{
|
|
uint32 *iv = (uint32 *) iva;
|
|
uint32 *d = (uint32 *) data;
|
|
unsigned bs = 16;
|
|
|
|
while (len >= bs)
|
|
{
|
|
d[0] ^= iv[0];
|
|
d[1] ^= iv[1];
|
|
d[2] ^= iv[2];
|
|
d[3] ^= iv[3];
|
|
|
|
rijndael_encrypt(ctx, d, d);
|
|
|
|
iv = d;
|
|
d += bs / 4;
|
|
len -= bs;
|
|
}
|
|
}
|
|
|
|
void
|
|
aes_cbc_decrypt(rijndael_ctx *ctx, uint8 *iva, uint8 *data, unsigned len)
|
|
{
|
|
uint32 *d = (uint32 *) data;
|
|
unsigned bs = 16;
|
|
uint32 buf[4],
|
|
iv[4];
|
|
|
|
memcpy(iv, iva, bs);
|
|
while (len >= bs)
|
|
{
|
|
buf[0] = d[0];
|
|
buf[1] = d[1];
|
|
buf[2] = d[2];
|
|
buf[3] = d[3];
|
|
|
|
rijndael_decrypt(ctx, buf, d);
|
|
|
|
d[0] ^= iv[0];
|
|
d[1] ^= iv[1];
|
|
d[2] ^= iv[2];
|
|
d[3] ^= iv[3];
|
|
|
|
iv[0] = buf[0];
|
|
iv[1] = buf[1];
|
|
iv[2] = buf[2];
|
|
iv[3] = buf[3];
|
|
d += 4;
|
|
len -= bs;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* pre-calculate tables.
|
|
*
|
|
* On i386 lifts 17k from .bss to .rodata
|
|
* and avoids 1k code and setup time.
|
|
* -marko
|
|
*/
|
|
#ifdef PRINT_TABS
|
|
|
|
static void
|
|
show256u8(char *name, uint8 *data)
|
|
{
|
|
int i;
|
|
|
|
printf("static const u1byte %s[256] = {\n ", name);
|
|
for (i = 0; i < 256;)
|
|
{
|
|
printf("%u", pow_tab[i++]);
|
|
if (i < 256)
|
|
printf(i % 16 ? ", " : ",\n ");
|
|
}
|
|
printf("\n};\n\n");
|
|
}
|
|
|
|
|
|
static void
|
|
show4x256u32(char *name, uint32 data[4][256])
|
|
{
|
|
int i,
|
|
j;
|
|
|
|
printf("static const u4byte %s[4][256] = {\n{\n ", name);
|
|
for (i = 0; i < 4; i++)
|
|
{
|
|
for (j = 0; j < 256;)
|
|
{
|
|
printf("0x%08x", data[i][j]);
|
|
j++;
|
|
if (j < 256)
|
|
printf(j % 4 ? ", " : ",\n ");
|
|
}
|
|
printf(i < 3 ? "\n}, {\n " : "\n}\n");
|
|
}
|
|
printf("};\n\n");
|
|
}
|
|
|
|
int
|
|
main()
|
|
{
|
|
int i;
|
|
char *hdr = "/* Generated by rijndael.c */\n\n";
|
|
|
|
gen_tabs();
|
|
|
|
printf(hdr);
|
|
show256u8("pow_tab", pow_tab);
|
|
show256u8("log_tab", log_tab);
|
|
show256u8("sbx_tab", sbx_tab);
|
|
show256u8("isb_tab", isb_tab);
|
|
|
|
show4x256u32("ft_tab", ft_tab);
|
|
show4x256u32("it_tab", it_tab);
|
|
#ifdef LARGE_TABLES
|
|
show4x256u32("fl_tab", fl_tab);
|
|
show4x256u32("il_tab", il_tab);
|
|
#endif
|
|
printf("static const u4byte rco_tab[10] = {\n ");
|
|
for (i = 0; i < 10; i++)
|
|
{
|
|
printf("0x%08x", rco_tab[i]);
|
|
if (i < 9)
|
|
printf(", ");
|
|
if (i == 4)
|
|
printf("\n ");
|
|
}
|
|
printf("\n};\n\n");
|
|
return 0;
|
|
}
|
|
|
|
#endif
|