Reconstruction of des.exe/undes.exe

2026-09-09 23:28:46 +02:00
parent b90136f137
commit 5aa37bf374
64 changed files with 13344 additions and 2 deletions
@@ -0,0 +1,83 @@
+/* pcbc_enc.c */
+/* Copyright (C) 1995 Eric Young (eay@mincom.oz.au).
+ * All rights reserved.
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * See the COPYRIGHT file in the libdes distribution for more details.
+ */
+
+#ifdef _MSC_VER
+  #include "des_locl.h"
+#else
+  #include "libdes/des_locl.h"
+#endif /* _MSC_VER */
+
+int des_pcbc_encrypt(input,output,length,schedule,ivec,encrypt)
+des_cblock *input;
+des_cblock *output;
+long length;
+des_key_schedule schedule;
+des_cblock *ivec;
+int encrypt;
+	{
+	register unsigned long sin0,sin1,xor0,xor1,tout0,tout1;
+	unsigned long tin[2],tout[2];
+	unsigned char *in,*out,*iv;
+
+	in=(unsigned char *)input;
+	out=(unsigned char *)output;
+	iv=(unsigned char *)ivec;
+
+	if (encrypt)
+		{
+		c2l(iv,xor0);
+		c2l(iv,xor1);
+		for (; length>0; length-=8)
+			{
+			if (length >= 8)
+				{
+				c2l(in,sin0);
+				c2l(in,sin1);
+				}
+			else
+				c2ln(in,sin0,sin1,length);
+			tin[0]=sin0^xor0;
+			tin[1]=sin1^xor1;
+			des_encrypt((unsigned long *)tin,(unsigned long *)tout,
+				schedule,encrypt);
+			tout0=tout[0];
+			tout1=tout[1];
+			xor0=sin0^tout[0];
+			xor1=sin1^tout[1];
+			l2c(tout0,out);
+			l2c(tout1,out);
+			}
+		}
+	else
+		{
+		c2l(iv,xor0); c2l(iv,xor1);
+		for (; length>0; length-=8)
+			{
+			c2l(in,sin0);
+			c2l(in,sin1);
+			tin[0]=sin0;
+			tin[1]=sin1;
+			des_encrypt((unsigned long *)tin,(unsigned long *)tout,
+				schedule,encrypt);
+			tout0=tout[0]^xor0;
+			tout1=tout[1]^xor1;
+			if (length >= 8)
+				{
+				l2c(tout0,out);
+				l2c(tout1,out);
+				}
+			else
+				l2cn(tout0,tout1,out,length);
+			xor0=tout0^sin0;
+			xor1=tout1^sin1;
+			}
+		}
+	tin[0]=tin[1]=tout[0]=tout[1]=0;
+	sin0=sin1=xor0=xor1=tout0=tout1=0;
+	return(0);
+	}