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Diffstat (limited to 'secure/lib/libdes/ofb64enc.c')
| -rw-r--r-- | secure/lib/libdes/ofb64enc.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/secure/lib/libdes/ofb64enc.c b/secure/lib/libdes/ofb64enc.c new file mode 100644 index 0000000..bc8dd8c --- /dev/null +++ b/secure/lib/libdes/ofb64enc.c @@ -0,0 +1,103 @@ +/* lib/des/ofb64enc.c */ +/* Copyright (C) 1995 Eric Young (eay@mincom.oz.au) + * All rights reserved. + * + * This file is part of an SSL implementation written + * by Eric Young (eay@mincom.oz.au). + * The implementation was written so as to conform with Netscapes SSL + * specification. This library and applications are + * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE + * as long as the following conditions are aheared to. + * + * Copyright remains Eric Young's, and as such any Copyright notices in + * the code are not to be removed. If this code is used in a product, + * Eric Young should be given attribution as the author of the parts 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 software developed by Eric Young (eay@mincom.oz.au) + * + * 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" + +/* The input and output encrypted as though 64bit ofb 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_ofb64_encrypt(in, out, length, schedule, ivec, num) +register unsigned char *in; +register unsigned char *out; +long length; +des_key_schedule schedule; +des_cblock (*ivec); +int *num; + { + register unsigned long v0,v1,t; + register int n=*num; + register long l=length; + des_cblock d; + register char *dp; + unsigned long ti[2]; + unsigned char *iv; + int save=0; + + iv=(unsigned char *)ivec; + c2l(iv,v0); + c2l(iv,v1); + ti[0]=v0; + ti[1]=v1; + dp=(char *)d; + l2c(v0,dp); + l2c(v1,dp); + while (l--) + { + if (n == 0) + { + des_encrypt((unsigned long *)ti,schedule,DES_ENCRYPT); + dp=(char *)d; + t=ti[0]; l2c(t,dp); + t=ti[1]; l2c(t,dp); + save++; + } + *(out++)=*(in++)^d[n]; + n=(n+1)&0x07; + } + if (save) + { + v0=ti[0]; + v1=ti[1]; + iv=(unsigned char *)ivec; + l2c(v0,iv); + l2c(v1,iv); + } + t=v0=v1=ti[0]=ti[1]=0; + *num=n; + } + |
