/* * des_crypt.c, DES encryption library routines * Copyright (c) 2010, Oracle America, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 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. * * Neither the name of the "Oracle America, Inc." nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "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 * COPYRIGHT HOLDER 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. */ #include <sys/types.h> #include <rpc/des_crypt.h> #include <abi-versions.h> #include "des.h" extern int _des_crypt (char *, unsigned, struct desparams *); /* * Copy 8 bytes */ #define COPY8(src, dst) { \ register char *a = (char *) dst; \ register char *b = (char *) src; \ *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ } /* * Copy multiple of 8 bytes */ #define DESCOPY(src, dst, len) { \ register char *a = (char *) dst; \ register char *b = (char *) src; \ register int i; \ for (i = (int) len; i > 0; i -= 8) { \ *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ *a++ = *b++; *a++ = *b++; *a++ = *b++; *a++ = *b++; \ } \ } /* * Common code to cbc_crypt() & ecb_crypt() */ static int common_crypt (char *key, char *buf, register unsigned len, unsigned mode, register struct desparams *desp) { register int desdev; if ((len % 8) != 0 || len > DES_MAXDATA) return DESERR_BADPARAM; desp->des_dir = ((mode & DES_DIRMASK) == DES_ENCRYPT) ? ENCRYPT : DECRYPT; desdev = mode & DES_DEVMASK; COPY8 (key, desp->des_key); /* * software */ if (!_des_crypt (buf, len, desp)) return DESERR_HWERROR; return desdev == DES_SW ? DESERR_NONE : DESERR_NOHWDEVICE; } /* * CBC mode encryption */ int cbc_crypt (char *key, char *buf, unsigned int len, unsigned int mode, char *ivec) { int err; struct desparams dp; dp.des_mode = CBC; COPY8 (ivec, dp.des_ivec); err = common_crypt (key, buf, len, mode, &dp); COPY8 (dp.des_ivec, ivec); return err; } libc_hidden_nolink_sunrpc (cbc_crypt, GLIBC_2_1) /* * ECB mode encryption */ int ecb_crypt (char *key, char *buf, unsigned int len, unsigned int mode) { struct desparams dp; dp.des_mode = ECB; return common_crypt (key, buf, len, mode, &dp); } libc_hidden_nolink_sunrpc (ecb_crypt, GLIBC_2_1)