android / platform / external / openssl.git / f42d491ab90c82302b0054c62014c1ee9b638aff / . / crypto / des / xcbc_enc.c

/* crypto/des/xcbc_enc.c */ | |

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |

* 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.] | |

*/ | |

#include "des_locl.h" | |

/* RSA's DESX */ | |

#if 0 /* broken code, preserved just in case anyone specifically looks for this */ | |

static const unsigned char desx_white_in2out[256]={ | |

0xBD,0x56,0xEA,0xF2,0xA2,0xF1,0xAC,0x2A,0xB0,0x93,0xD1,0x9C,0x1B,0x33,0xFD,0xD0, | |

0x30,0x04,0xB6,0xDC,0x7D,0xDF,0x32,0x4B,0xF7,0xCB,0x45,0x9B,0x31,0xBB,0x21,0x5A, | |

0x41,0x9F,0xE1,0xD9,0x4A,0x4D,0x9E,0xDA,0xA0,0x68,0x2C,0xC3,0x27,0x5F,0x80,0x36, | |

0x3E,0xEE,0xFB,0x95,0x1A,0xFE,0xCE,0xA8,0x34,0xA9,0x13,0xF0,0xA6,0x3F,0xD8,0x0C, | |

0x78,0x24,0xAF,0x23,0x52,0xC1,0x67,0x17,0xF5,0x66,0x90,0xE7,0xE8,0x07,0xB8,0x60, | |

0x48,0xE6,0x1E,0x53,0xF3,0x92,0xA4,0x72,0x8C,0x08,0x15,0x6E,0x86,0x00,0x84,0xFA, | |

0xF4,0x7F,0x8A,0x42,0x19,0xF6,0xDB,0xCD,0x14,0x8D,0x50,0x12,0xBA,0x3C,0x06,0x4E, | |

0xEC,0xB3,0x35,0x11,0xA1,0x88,0x8E,0x2B,0x94,0x99,0xB7,0x71,0x74,0xD3,0xE4,0xBF, | |

0x3A,0xDE,0x96,0x0E,0xBC,0x0A,0xED,0x77,0xFC,0x37,0x6B,0x03,0x79,0x89,0x62,0xC6, | |

0xD7,0xC0,0xD2,0x7C,0x6A,0x8B,0x22,0xA3,0x5B,0x05,0x5D,0x02,0x75,0xD5,0x61,0xE3, | |

0x18,0x8F,0x55,0x51,0xAD,0x1F,0x0B,0x5E,0x85,0xE5,0xC2,0x57,0x63,0xCA,0x3D,0x6C, | |

0xB4,0xC5,0xCC,0x70,0xB2,0x91,0x59,0x0D,0x47,0x20,0xC8,0x4F,0x58,0xE0,0x01,0xE2, | |

0x16,0x38,0xC4,0x6F,0x3B,0x0F,0x65,0x46,0xBE,0x7E,0x2D,0x7B,0x82,0xF9,0x40,0xB5, | |

0x1D,0x73,0xF8,0xEB,0x26,0xC7,0x87,0x97,0x25,0x54,0xB1,0x28,0xAA,0x98,0x9D,0xA5, | |

0x64,0x6D,0x7A,0xD4,0x10,0x81,0x44,0xEF,0x49,0xD6,0xAE,0x2E,0xDD,0x76,0x5C,0x2F, | |

0xA7,0x1C,0xC9,0x09,0x69,0x9A,0x83,0xCF,0x29,0x39,0xB9,0xE9,0x4C,0xFF,0x43,0xAB, | |

}; | |

void DES_xwhite_in2out(const_DES_cblock *des_key, const_DES_cblock *in_white, | |

DES_cblock *out_white) | |

{ | |

int out0,out1; | |

int i; | |

const unsigned char *key = &(*des_key)[0]; | |

const unsigned char *in = &(*in_white)[0]; | |

unsigned char *out = &(*out_white)[0]; | |

out[0]=out[1]=out[2]=out[3]=out[4]=out[5]=out[6]=out[7]=0; | |

out0=out1=0; | |

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

{ | |

out[i]=key[i]^desx_white_in2out[out0^out1]; | |

out0=out1; | |

out1=(int)out[i&0x07]; | |

} | |

out0=out[0]; | |

out1=out[i]; /* BUG: out-of-bounds read */ | |

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

{ | |

out[i]=in[i]^desx_white_in2out[out0^out1]; | |

out0=out1; | |

out1=(int)out[i&0x07]; | |

} | |

} | |

#endif | |

void DES_xcbc_encrypt(const unsigned char *in, unsigned char *out, | |

long length, DES_key_schedule *schedule, | |

DES_cblock *ivec, const_DES_cblock *inw, | |

const_DES_cblock *outw, int enc) | |

{ | |

register DES_LONG tin0,tin1; | |

register DES_LONG tout0,tout1,xor0,xor1; | |

register DES_LONG inW0,inW1,outW0,outW1; | |

register const unsigned char *in2; | |

register long l=length; | |

DES_LONG tin[2]; | |

unsigned char *iv; | |

in2 = &(*inw)[0]; | |

c2l(in2,inW0); | |

c2l(in2,inW1); | |

in2 = &(*outw)[0]; | |

c2l(in2,outW0); | |

c2l(in2,outW1); | |

iv = &(*ivec)[0]; | |

if (enc) | |

{ | |

c2l(iv,tout0); | |

c2l(iv,tout1); | |

for (l-=8; l>=0; l-=8) | |

{ | |

c2l(in,tin0); | |

c2l(in,tin1); | |

tin0^=tout0^inW0; tin[0]=tin0; | |

tin1^=tout1^inW1; tin[1]=tin1; | |

DES_encrypt1(tin,schedule,DES_ENCRYPT); | |

tout0=tin[0]^outW0; l2c(tout0,out); | |

tout1=tin[1]^outW1; l2c(tout1,out); | |

} | |

if (l != -8) | |

{ | |

c2ln(in,tin0,tin1,l+8); | |

tin0^=tout0^inW0; tin[0]=tin0; | |

tin1^=tout1^inW1; tin[1]=tin1; | |

DES_encrypt1(tin,schedule,DES_ENCRYPT); | |

tout0=tin[0]^outW0; l2c(tout0,out); | |

tout1=tin[1]^outW1; l2c(tout1,out); | |

} | |

iv = &(*ivec)[0]; | |

l2c(tout0,iv); | |

l2c(tout1,iv); | |

} | |

else | |

{ | |

c2l(iv,xor0); | |

c2l(iv,xor1); | |

for (l-=8; l>0; l-=8) | |

{ | |

c2l(in,tin0); tin[0]=tin0^outW0; | |

c2l(in,tin1); tin[1]=tin1^outW1; | |

DES_encrypt1(tin,schedule,DES_DECRYPT); | |

tout0=tin[0]^xor0^inW0; | |

tout1=tin[1]^xor1^inW1; | |

l2c(tout0,out); | |

l2c(tout1,out); | |

xor0=tin0; | |

xor1=tin1; | |

} | |

if (l != -8) | |

{ | |

c2l(in,tin0); tin[0]=tin0^outW0; | |

c2l(in,tin1); tin[1]=tin1^outW1; | |

DES_encrypt1(tin,schedule,DES_DECRYPT); | |

tout0=tin[0]^xor0^inW0; | |

tout1=tin[1]^xor1^inW1; | |

l2cn(tout0,tout1,out,l+8); | |

xor0=tin0; | |

xor1=tin1; | |

} | |

iv = &(*ivec)[0]; | |

l2c(xor0,iv); | |

l2c(xor1,iv); | |

} | |

tin0=tin1=tout0=tout1=xor0=xor1=0; | |

inW0=inW1=outW0=outW1=0; | |

tin[0]=tin[1]=0; | |

} | |