X-Git-Url: https://git.openssl.org/gitweb/?a=blobdiff_plain;f=crypto%2Frc5%2Frc5_enc.c;h=2f9feee0e0f86d5567ecacbdcba864251656bcba;hb=33388b44b67145af2181b1e9528c381c8ea0d1b6;hp=f327d32a766084bad0ea57dbe4f862da0525d1bc;hpb=1921eaad645c9a9f62c1ed79b7ae87c417aa8a3c;p=openssl.git diff --git a/crypto/rc5/rc5_enc.c b/crypto/rc5/rc5_enc.c index f327d32a76..2f9feee0e0 100644 --- a/crypto/rc5/rc5_enc.c +++ b/crypto/rc5/rc5_enc.c @@ -1,215 +1,166 @@ -/* crypto/rc5/rc5_enc.c */ -/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) - * All rights reserved. +/* + * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. * - * This package is an SSL implementation written - * by Eric Young (eay@cryptsoft.com). - * The implementation was written so as to conform with Netscapes SSL. - * - * This library is free for commercial and non-commercial use as long as - * the following conditions are aheared to. The following conditions - * apply to all code found in this distribution, be it the RC4, RSA, - * lhash, DES, etc., code; not just the SSL code. The SSL documentation - * included with this distribution is covered by the same copyright terms - * except that the holder is Tim Hudson (tjh@cryptsoft.com). - * - * Copyright remains Eric Young's, and as such any Copyright notices in - * the code are not to be removed. - * If this package is used in a product, Eric Young should be given attribution - * as the author of the parts of the library used. - * This can be in the form of a textual message at program startup or - * in documentation (online or textual) provided with the package. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * "This product includes cryptographic software written by - * Eric Young (eay@cryptsoft.com)" - * The word 'cryptographic' can be left out if the rouines from the library - * being used are not cryptographic related :-). - * 4. If you include any Windows specific code (or a derivative thereof) from - * the apps directory (application code) you must include an acknowledgement: - * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" - * - * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * The licence and distribution terms for any publically available version or - * derivative of this code cannot be changed. i.e. this code cannot simply be - * copied and put under another distribution licence - * [including the GNU Public Licence.] + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ +/* + * RC5 low level APIs are deprecated for public use, but still ok for internal + * use. + */ +#include "internal/deprecated.h" + #include #include -#include "rc5_locl.h" +#include "rc5_local.h" void RC5_32_cbc_encrypt(const unsigned char *in, unsigned char *out, - long length, RC5_32_KEY *ks, unsigned char *iv, - int encrypt) - { - register unsigned long tin0,tin1; - register unsigned long tout0,tout1,xor0,xor1; - register long l=length; - unsigned long tin[2]; + long length, RC5_32_KEY *ks, unsigned char *iv, + int encrypt) +{ + register unsigned long tin0, tin1; + register unsigned long tout0, tout1, xor0, xor1; + register long l = length; + unsigned long tin[2]; - if (encrypt) - { - c2l(iv,tout0); - c2l(iv,tout1); - iv-=8; - for (l-=8; l>=0; l-=8) - { - c2l(in,tin0); - c2l(in,tin1); - tin0^=tout0; - tin1^=tout1; - tin[0]=tin0; - tin[1]=tin1; - RC5_32_encrypt(tin,ks); - tout0=tin[0]; l2c(tout0,out); - tout1=tin[1]; l2c(tout1,out); - } - if (l != -8) - { - c2ln(in,tin0,tin1,l+8); - tin0^=tout0; - tin1^=tout1; - tin[0]=tin0; - tin[1]=tin1; - RC5_32_encrypt(tin,ks); - tout0=tin[0]; l2c(tout0,out); - tout1=tin[1]; l2c(tout1,out); - } - l2c(tout0,iv); - l2c(tout1,iv); - } - else - { - c2l(iv,xor0); - c2l(iv,xor1); - iv-=8; - for (l-=8; l>=0; l-=8) - { - c2l(in,tin0); tin[0]=tin0; - c2l(in,tin1); tin[1]=tin1; - RC5_32_decrypt(tin,ks); - tout0=tin[0]^xor0; - tout1=tin[1]^xor1; - l2c(tout0,out); - l2c(tout1,out); - xor0=tin0; - xor1=tin1; - } - if (l != -8) - { - c2l(in,tin0); tin[0]=tin0; - c2l(in,tin1); tin[1]=tin1; - RC5_32_decrypt(tin,ks); - tout0=tin[0]^xor0; - tout1=tin[1]^xor1; - l2cn(tout0,tout1,out,l+8); - xor0=tin0; - xor1=tin1; - } - l2c(xor0,iv); - l2c(xor1,iv); - } - tin0=tin1=tout0=tout1=xor0=xor1=0; - tin[0]=tin[1]=0; - } + if (encrypt) { + c2l(iv, tout0); + c2l(iv, tout1); + iv -= 8; + for (l -= 8; l >= 0; l -= 8) { + c2l(in, tin0); + c2l(in, tin1); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + RC5_32_encrypt(tin, ks); + tout0 = tin[0]; + l2c(tout0, out); + tout1 = tin[1]; + l2c(tout1, out); + } + if (l != -8) { + c2ln(in, tin0, tin1, l + 8); + tin0 ^= tout0; + tin1 ^= tout1; + tin[0] = tin0; + tin[1] = tin1; + RC5_32_encrypt(tin, ks); + tout0 = tin[0]; + l2c(tout0, out); + tout1 = tin[1]; + l2c(tout1, out); + } + l2c(tout0, iv); + l2c(tout1, iv); + } else { + c2l(iv, xor0); + c2l(iv, xor1); + iv -= 8; + for (l -= 8; l >= 0; l -= 8) { + c2l(in, tin0); + tin[0] = tin0; + c2l(in, tin1); + tin[1] = tin1; + RC5_32_decrypt(tin, ks); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2c(tout0, out); + l2c(tout1, out); + xor0 = tin0; + xor1 = tin1; + } + if (l != -8) { + c2l(in, tin0); + tin[0] = tin0; + c2l(in, tin1); + tin[1] = tin1; + RC5_32_decrypt(tin, ks); + tout0 = tin[0] ^ xor0; + tout1 = tin[1] ^ xor1; + l2cn(tout0, tout1, out, l + 8); + xor0 = tin0; + xor1 = tin1; + } + l2c(xor0, iv); + l2c(xor1, iv); + } + tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; + tin[0] = tin[1] = 0; +} void RC5_32_encrypt(unsigned long *d, RC5_32_KEY *key) - { - RC5_32_INT a,b,*s; +{ + RC5_32_INT a, b, *s; - s=key->data; + s = key->data; - a=d[0]+s[0]; - b=d[1]+s[1]; - E_RC5_32(a,b,s, 2); - E_RC5_32(a,b,s, 4); - E_RC5_32(a,b,s, 6); - E_RC5_32(a,b,s, 8); - E_RC5_32(a,b,s,10); - E_RC5_32(a,b,s,12); - E_RC5_32(a,b,s,14); - E_RC5_32(a,b,s,16); - if (key->rounds == 12) - { - E_RC5_32(a,b,s,18); - E_RC5_32(a,b,s,20); - E_RC5_32(a,b,s,22); - E_RC5_32(a,b,s,24); - } - else if (key->rounds == 16) - { - /* Do a full expansion to avoid a jump */ - E_RC5_32(a,b,s,18); - E_RC5_32(a,b,s,20); - E_RC5_32(a,b,s,22); - E_RC5_32(a,b,s,24); - E_RC5_32(a,b,s,26); - E_RC5_32(a,b,s,28); - E_RC5_32(a,b,s,30); - E_RC5_32(a,b,s,32); - } - d[0]=a; - d[1]=b; - } + a = d[0] + s[0]; + b = d[1] + s[1]; + E_RC5_32(a, b, s, 2); + E_RC5_32(a, b, s, 4); + E_RC5_32(a, b, s, 6); + E_RC5_32(a, b, s, 8); + E_RC5_32(a, b, s, 10); + E_RC5_32(a, b, s, 12); + E_RC5_32(a, b, s, 14); + E_RC5_32(a, b, s, 16); + if (key->rounds == 12) { + E_RC5_32(a, b, s, 18); + E_RC5_32(a, b, s, 20); + E_RC5_32(a, b, s, 22); + E_RC5_32(a, b, s, 24); + } else if (key->rounds == 16) { + /* Do a full expansion to avoid a jump */ + E_RC5_32(a, b, s, 18); + E_RC5_32(a, b, s, 20); + E_RC5_32(a, b, s, 22); + E_RC5_32(a, b, s, 24); + E_RC5_32(a, b, s, 26); + E_RC5_32(a, b, s, 28); + E_RC5_32(a, b, s, 30); + E_RC5_32(a, b, s, 32); + } + d[0] = a; + d[1] = b; +} void RC5_32_decrypt(unsigned long *d, RC5_32_KEY *key) - { - RC5_32_INT a,b,*s; - - s=key->data; +{ + RC5_32_INT a, b, *s; - a=d[0]; - b=d[1]; - if (key->rounds == 16) - { - D_RC5_32(a,b,s,32); - D_RC5_32(a,b,s,30); - D_RC5_32(a,b,s,28); - D_RC5_32(a,b,s,26); - /* Do a full expansion to avoid a jump */ - D_RC5_32(a,b,s,24); - D_RC5_32(a,b,s,22); - D_RC5_32(a,b,s,20); - D_RC5_32(a,b,s,18); - } - else if (key->rounds == 12) - { - D_RC5_32(a,b,s,24); - D_RC5_32(a,b,s,22); - D_RC5_32(a,b,s,20); - D_RC5_32(a,b,s,18); - } - D_RC5_32(a,b,s,16); - D_RC5_32(a,b,s,14); - D_RC5_32(a,b,s,12); - D_RC5_32(a,b,s,10); - D_RC5_32(a,b,s, 8); - D_RC5_32(a,b,s, 6); - D_RC5_32(a,b,s, 4); - D_RC5_32(a,b,s, 2); - d[0]=a-s[0]; - d[1]=b-s[1]; - } + s = key->data; + a = d[0]; + b = d[1]; + if (key->rounds == 16) { + D_RC5_32(a, b, s, 32); + D_RC5_32(a, b, s, 30); + D_RC5_32(a, b, s, 28); + D_RC5_32(a, b, s, 26); + /* Do a full expansion to avoid a jump */ + D_RC5_32(a, b, s, 24); + D_RC5_32(a, b, s, 22); + D_RC5_32(a, b, s, 20); + D_RC5_32(a, b, s, 18); + } else if (key->rounds == 12) { + D_RC5_32(a, b, s, 24); + D_RC5_32(a, b, s, 22); + D_RC5_32(a, b, s, 20); + D_RC5_32(a, b, s, 18); + } + D_RC5_32(a, b, s, 16); + D_RC5_32(a, b, s, 14); + D_RC5_32(a, b, s, 12); + D_RC5_32(a, b, s, 10); + D_RC5_32(a, b, s, 8); + D_RC5_32(a, b, s, 6); + D_RC5_32(a, b, s, 4); + D_RC5_32(a, b, s, 2); + d[0] = a - s[0]; + d[1] = b - s[1]; +}