summaryrefslogtreecommitdiff
path: root/main/openssl/crypto/des/cfb64ede.c
diff options
context:
space:
mode:
Diffstat (limited to 'main/openssl/crypto/des/cfb64ede.c')
-rw-r--r--main/openssl/crypto/des/cfb64ede.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/main/openssl/crypto/des/cfb64ede.c b/main/openssl/crypto/des/cfb64ede.c
new file mode 100644
index 00000000..de34ecce
--- /dev/null
+++ b/main/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;
+ }
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 21:34:52 +0000