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Diffstat (limited to 'openssl/crypto/des/cfb64ede.c')
| -rw-r--r-- | openssl/crypto/des/cfb64ede.c | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/openssl/crypto/des/cfb64ede.c b/openssl/crypto/des/cfb64ede.c new file mode 100644 index 00000000..de34ecce --- /dev/null +++ b/openssl/crypto/des/cfb64ede.c @@ -0,0 +1,254 @@ +/* crypto/des/cfb64ede.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" +#include "e_os.h" + +/* The input and output encrypted as though 64bit cfb mode is being + * used. The extra state information to record how much of the + * 64bit block we have used is contained in *num; + */ + +void DES_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out, + long length, DES_key_schedule *ks1, + DES_key_schedule *ks2, DES_key_schedule *ks3, + DES_cblock *ivec, int *num, int enc) + { + register DES_LONG v0,v1; + register long l=length; + register int n= *num; + DES_LONG ti[2]; + unsigned char *iv,c,cc; + + iv=&(*ivec)[0]; + if (enc) + { + while (l--) + { + if (n == 0) + { + c2l(iv,v0); + c2l(iv,v1); + + ti[0]=v0; + ti[1]=v1; + DES_encrypt3(ti,ks1,ks2,ks3); + v0=ti[0]; + v1=ti[1]; + + iv = &(*ivec)[0]; + l2c(v0,iv); + l2c(v1,iv); + iv = &(*ivec)[0]; + } + c= *(in++)^iv[n]; + *(out++)=c; + iv[n]=c; + n=(n+1)&0x07; + } + } + else + { + while (l--) + { + if (n == 0) + { + c2l(iv,v0); + c2l(iv,v1); + + ti[0]=v0; + ti[1]=v1; + DES_encrypt3(ti,ks1,ks2,ks3); + v0=ti[0]; + v1=ti[1]; + + iv = &(*ivec)[0]; + l2c(v0,iv); + l2c(v1,iv); + iv = &(*ivec)[0]; + } + cc= *(in++); + c=iv[n]; + iv[n]=cc; + *(out++)=c^cc; + n=(n+1)&0x07; + } + } + v0=v1=ti[0]=ti[1]=c=cc=0; + *num=n; + } + +#ifdef undef /* MACRO */ +void DES_ede2_cfb64_encrypt(unsigned char *in, unsigned char *out, long length, + DES_key_schedule ks1, DES_key_schedule ks2, DES_cblock (*ivec), + int *num, int enc) + { + DES_ede3_cfb64_encrypt(in,out,length,ks1,ks2,ks1,ivec,num,enc); + } +#endif + +/* This is compatible with the single key CFB-r for DES, even thought that's + * not what EVP needs. + */ + +void DES_ede3_cfb_encrypt(const unsigned char *in,unsigned char *out, + int numbits,long length,DES_key_schedule *ks1, + DES_key_schedule *ks2,DES_key_schedule *ks3, + DES_cblock *ivec,int enc) + { + register DES_LONG d0,d1,v0,v1; + register unsigned long l=length,n=((unsigned int)numbits+7)/8; + register int num=numbits,i; + DES_LONG ti[2]; + unsigned char *iv; + unsigned char ovec[16]; + + if (num > 64) return; + iv = &(*ivec)[0]; + c2l(iv,v0); + c2l(iv,v1); + if (enc) + { + while (l >= n) + { + l-=n; + ti[0]=v0; + ti[1]=v1; + DES_encrypt3(ti,ks1,ks2,ks3); + c2ln(in,d0,d1,n); + in+=n; + d0^=ti[0]; + d1^=ti[1]; + l2cn(d0,d1,out,n); + out+=n; + /* 30-08-94 - eay - changed because l>>32 and + * l<<32 are bad under gcc :-( */ + if (num == 32) + { v0=v1; v1=d0; } + else if (num == 64) + { v0=d0; v1=d1; } + else + { + iv=&ovec[0]; + l2c(v0,iv); + l2c(v1,iv); + l2c(d0,iv); + l2c(d1,iv); + /* shift ovec left most of the bits... */ + memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0)); + /* now the remaining bits */ + if(num%8 != 0) + for(i=0 ; i < 8 ; ++i) + { + ovec[i]<<=num%8; + ovec[i]|=ovec[i+1]>>(8-num%8); + } + iv=&ovec[0]; + c2l(iv,v0); + c2l(iv,v1); + } + } + } + else + { + while (l >= n) + { + l-=n; + ti[0]=v0; + ti[1]=v1; + DES_encrypt3(ti,ks1,ks2,ks3); + c2ln(in,d0,d1,n); + in+=n; + /* 30-08-94 - eay - changed because l>>32 and + * l<<32 are bad under gcc :-( */ + if (num == 32) + { v0=v1; v1=d0; } + else if (num == 64) + { v0=d0; v1=d1; } + else + { + iv=&ovec[0]; + l2c(v0,iv); + l2c(v1,iv); + l2c(d0,iv); + l2c(d1,iv); + /* shift ovec left most of the bits... */ + memmove(ovec,ovec+num/8,8+(num%8 ? 1 : 0)); + /* now the remaining bits */ + if(num%8 != 0) + for(i=0 ; i < 8 ; ++i) + { + ovec[i]<<=num%8; + ovec[i]|=ovec[i+1]>>(8-num%8); + } + iv=&ovec[0]; + c2l(iv,v0); + c2l(iv,v1); + } + d0^=ti[0]; + d1^=ti[1]; + l2cn(d0,d1,out,n); + out+=n; + } + } + iv = &(*ivec)[0]; + l2c(v0,iv); + l2c(v1,iv); + v0=v1=d0=d1=ti[0]=ti[1]=0; + } + |