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File: [local] / sys / crypto / arc4.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:09:30 2008 UTC (16 years, 4 months ago) by nbrk
Import of OpenBSD 4.2 release kernel tree with initial code to support Jornada 720/728, StrongARM 1110-based handheld PC. At this point kernel roots on NFS and boots into vfs_mountroot() and traps. What is supported: - glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode (needs some palette tweaks for non black/white/blue colors, i think) - saic, SA11x0 interrupt controller (needs cleanup) - sacom, SA11x0 UART (supported only as boot console for now) - SA11x0 GPIO controller fully supported (but can't handle multiple interrupt handlers on one gpio pin) - sassp, SSP port on SA11x0 that attaches spibus - Jornada microcontroller (jmcu) to control kbd, battery, etc throught the SPI bus (wskbd attaches on jmcu, but not tested) - tod functions seem work - initial code for SA-1111 (chip companion) : this is TODO Next important steps, i think: - gpio and intc on sa1111 - pcmcia support for sa11x0 (and sa1111 help logic) - REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs) - root on wd0! (using already supported PCMCIA-ATA) |
/* $OpenBSD: arc4.c,v 1.2 2007/07/24 19:35:20 damien Exp $ */ /* * Copyright (c) 2003 Markus Friedl <markus@openbsd.org> * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <sys/types.h> #include <crypto/arc4.h> #define RC4SWAP(x,y) \ do { \ u_int8_t t = ctx->state[x]; \ ctx->state[x] = ctx->state[y]; \ ctx->state[y] = t; \ } while(0) void rc4_keysetup(struct rc4_ctx *ctx, u_char *key, u_int32_t klen) { u_int8_t x, y; u_int32_t i; x = y = 0; for (i = 0; i < RC4STATE; i++) ctx->state[i] = i; for (i = 0; i < RC4STATE; i++) { y = (key[x] + ctx->state[i] + y) % RC4STATE; RC4SWAP(i, y); x = (x + 1) % klen; } ctx->x = ctx->y = 0; } void rc4_crypt(struct rc4_ctx *ctx, u_char *src, u_char *dst, u_int32_t len) { u_int32_t i; for (i = 0; i < len; i++) { ctx->x = (ctx->x + 1) % RC4STATE; ctx->y = (ctx->state[ctx->x] + ctx->y) % RC4STATE; RC4SWAP(ctx->x, ctx->y); dst[i] = src[i] ^ ctx->state[ (ctx->state[ctx->x] + ctx->state[ctx->y]) % RC4STATE]; } } void rc4_skip(struct rc4_ctx *ctx, u_int32_t len) { for (; len > 0; len--) { ctx->x = (ctx->x + 1) % RC4STATE; ctx->y = (ctx->state[ctx->x] + ctx->y) % RC4STATE; RC4SWAP(ctx->x, ctx->y); } }