From 462f18c7b25fe3e467f837647d07ab0a78aa8d2b Mon Sep 17 00:00:00 2001 From: marha Date: Sun, 22 Feb 2015 21:39:56 +0100 Subject: Merged origin/release (checked in because wanted to merge new stuff) --- openssl/crypto/des/cfb_enc.c | 244 ++++++++++++++++++++++--------------------- 1 file changed, 124 insertions(+), 120 deletions(-) (limited to 'openssl/crypto/des/cfb_enc.c') diff --git a/openssl/crypto/des/cfb_enc.c b/openssl/crypto/des/cfb_enc.c index 720f29a28..bd0e29971 100644 --- a/openssl/crypto/des/cfb_enc.c +++ b/openssl/crypto/des/cfb_enc.c @@ -5,21 +5,21 @@ * 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: @@ -34,10 +34,10 @@ * 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 + * 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 @@ -49,7 +49,7 @@ * 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 @@ -60,136 +60,140 @@ #include "des_locl.h" #include -/* The input and output are loaded in multiples of 8 bits. - * What this means is that if you hame numbits=12 and length=2 - * the first 12 bits will be retrieved from the first byte and half - * the second. The second 12 bits will come from the 3rd and half the 4th - * byte. +/* + * The input and output are loaded in multiples of 8 bits. What this means is + * that if you hame numbits=12 and length=2 the first 12 bits will be + * retrieved from the first byte and half the second. The second 12 bits + * will come from the 3rd and half the 4th byte. + */ +/* + * Until Aug 1 2003 this function did not correctly implement CFB-r, so it + * will not be compatible with any encryption prior to that date. Ben. */ -/* Until Aug 1 2003 this function did not correctly implement CFB-r, so it - * will not be compatible with any encryption prior to that date. Ben. */ void DES_cfb_encrypt(const unsigned char *in, unsigned char *out, int numbits, - long length, DES_key_schedule *schedule, DES_cblock *ivec, - int enc) - { - register DES_LONG d0,d1,v0,v1; - register unsigned long l=length; - register int num=numbits/8,n=(numbits+7)/8,i,rem=numbits%8; - DES_LONG ti[2]; - unsigned char *iv; + long length, DES_key_schedule *schedule, + DES_cblock *ivec, int enc) +{ + register DES_LONG d0, d1, v0, v1; + register unsigned long l = length; + register int num = numbits / 8, n = (numbits + 7) / 8, i, rem = + numbits % 8; + DES_LONG ti[2]; + unsigned char *iv; #ifndef L_ENDIAN - unsigned char ovec[16]; + unsigned char ovec[16]; #else - unsigned int sh[4]; - unsigned char *ovec=(unsigned char *)sh; + unsigned int sh[4]; + unsigned char *ovec = (unsigned char *)sh; + + /* I kind of count that compiler optimizes away this assertioni, */ + assert(sizeof(sh[0]) == 4); /* as this holds true for all, */ + /* but 16-bit platforms... */ - /* I kind of count that compiler optimizes away this assertioni,*/ - assert (sizeof(sh[0])==4); /* as this holds true for all, */ - /* but 16-bit platforms... */ - #endif - if (numbits<=0 || numbits > 64) return; - iv = &(*ivec)[0]; - c2l(iv,v0); - c2l(iv,v1); - if (enc) - { - while (l >= (unsigned long)n) - { - l-=n; - ti[0]=v0; - ti[1]=v1; - DES_encrypt1((DES_LONG *)ti,schedule,DES_ENCRYPT); - 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 (numbits == 32) - { v0=v1; v1=d0; } - else if (numbits == 64) - { v0=d0; v1=d1; } - else - { + if (numbits <= 0 || numbits > 64) + return; + iv = &(*ivec)[0]; + c2l(iv, v0); + c2l(iv, v1); + if (enc) { + while (l >= (unsigned long)n) { + l -= n; + ti[0] = v0; + ti[1] = v1; + DES_encrypt1((DES_LONG *)ti, schedule, DES_ENCRYPT); + 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 (numbits == 32) { + v0 = v1; + v1 = d0; + } else if (numbits == 64) { + v0 = d0; + v1 = d1; + } else { #ifndef L_ENDIAN - iv=&ovec[0]; - l2c(v0,iv); - l2c(v1,iv); - l2c(d0,iv); - l2c(d1,iv); + iv = &ovec[0]; + l2c(v0, iv); + l2c(v1, iv); + l2c(d0, iv); + l2c(d1, iv); #else - sh[0]=v0, sh[1]=v1, sh[2]=d0, sh[3]=d1; + sh[0] = v0, sh[1] = v1, sh[2] = d0, sh[3] = d1; #endif - if (rem==0) - memmove(ovec,ovec+num,8); - else - for(i=0 ; i < 8 ; ++i) - ovec[i]=ovec[i+num]<>(8-rem); + if (rem == 0) + memmove(ovec, ovec + num, 8); + else + for (i = 0; i < 8; ++i) + ovec[i] = ovec[i + num] << rem | + ovec[i + num + 1] >> (8 - rem); #ifdef L_ENDIAN - v0=sh[0], v1=sh[1]; + v0 = sh[0], v1 = sh[1]; #else - iv=&ovec[0]; - c2l(iv,v0); - c2l(iv,v1); + iv = &ovec[0]; + c2l(iv, v0); + c2l(iv, v1); #endif - } - } - } - else - { - while (l >= (unsigned long)n) - { - l-=n; - ti[0]=v0; - ti[1]=v1; - DES_encrypt1((DES_LONG *)ti,schedule,DES_ENCRYPT); - c2ln(in,d0,d1,n); - in+=n; - /* 30-08-94 - eay - changed because l>>32 and - * l<<32 are bad under gcc :-( */ - if (numbits == 32) - { v0=v1; v1=d0; } - else if (numbits == 64) - { v0=d0; v1=d1; } - else - { + } + } + } else { + while (l >= (unsigned long)n) { + l -= n; + ti[0] = v0; + ti[1] = v1; + DES_encrypt1((DES_LONG *)ti, schedule, DES_ENCRYPT); + c2ln(in, d0, d1, n); + in += n; + /* + * 30-08-94 - eay - changed because l>>32 and l<<32 are bad under + * gcc :-( + */ + if (numbits == 32) { + v0 = v1; + v1 = d0; + } else if (numbits == 64) { + v0 = d0; + v1 = d1; + } else { #ifndef L_ENDIAN - iv=&ovec[0]; - l2c(v0,iv); - l2c(v1,iv); - l2c(d0,iv); - l2c(d1,iv); + iv = &ovec[0]; + l2c(v0, iv); + l2c(v1, iv); + l2c(d0, iv); + l2c(d1, iv); #else - sh[0]=v0, sh[1]=v1, sh[2]=d0, sh[3]=d1; + sh[0] = v0, sh[1] = v1, sh[2] = d0, sh[3] = d1; #endif - if (rem==0) - memmove(ovec,ovec+num,8); - else - for(i=0 ; i < 8 ; ++i) - ovec[i]=ovec[i+num]<>(8-rem); + if (rem == 0) + memmove(ovec, ovec + num, 8); + else + for (i = 0; i < 8; ++i) + ovec[i] = ovec[i + num] << rem | + ovec[i + num + 1] >> (8 - rem); #ifdef L_ENDIAN - v0=sh[0], v1=sh[1]; + v0 = sh[0], v1 = sh[1]; #else - iv=&ovec[0]; - c2l(iv,v0); - c2l(iv,v1); + iv = &ovec[0]; + c2l(iv, v0); + c2l(iv, v1); #endif - } - 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; - } - + } + 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; +} -- cgit v1.2.3