1 files changed, 128 insertions, 0 deletions
diff --git a/src/modules/common/swcipher.cpp b/src/modules/common/swcipher.cpp
new file mode 100644
index 0000000..bd4d551
--- /dev/null
+++ b/src/modules/common/swcipher.cpp
@@ -0,0 +1,128 @@
+/******************************************************************************
+ *  swcipher.cpp   - code for class 'SWCipher'- a driver class that provides
+ *				cipher utilities.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <swcipher.h>
+
+SWORD_NAMESPACE_START
+
+/******************************************************************************
+ * SWCipher Constructor - Initializes data for instance of SWCipher
+ *
+ */
+
+SWCipher::SWCipher(unsigned char *key) {
+	master.initialize(key, strlen((char *)key));
+	buf = 0;
+}
+
+
+/******************************************************************************
+ * SWCipher Destructor - Cleans up instance of SWCipher
+ */
+
+SWCipher::~SWCipher()
+{
+	if (buf)
+		free(buf);
+}
+
+
+char *SWCipher::Buf(const char *ibuf, unsigned long ilen)
+{
+	if (ibuf) {
+	
+		if (buf)
+			free(buf);
+
+		if (!ilen) {
+		        len = strlen(buf);
+			ilen = len + 1;
+		}
+		else len = ilen;
+
+		buf = (char *) malloc(ilen);
+		memcpy(buf, ibuf, ilen);
+		cipher = false;
+	}
+
+	Decode();
+
+	return buf;
+}
+
+
+char *SWCipher::cipherBuf(unsigned long *ilen, const char *ibuf)
+{
+	if (ibuf) {
+	
+		if (buf)
+			free(buf);
+			
+		buf = (char *) malloc(*ilen+1);
+		memcpy(buf, ibuf, *ilen);
+		len = *ilen;
+		cipher = true;
+	}
+
+	Encode();
+
+	*ilen = len;
+	return buf;
+}
+
+
+/******************************************************************************
+ * SWCipher::Encode	- This function "encodes" the input stream into the
+ *						output stream.
+ *						The GetChars() and SendChars() functions are
+ *						used to separate this method from the actual
+ *						i/o.
+ */
+
+void SWCipher::Encode(void)
+{
+	if (!cipher) {
+		work = master;
+		for (unsigned long i = 0; i < len; i++)
+			buf[i] = work.encrypt(buf[i]);
+		cipher = true;
+	}
+}
+
+
+/******************************************************************************
+ * SWCipher::Decode	- This function "decodes" the input stream into the
+ *						output stream.
+ *						The GetChars() and SendChars() functions are
+ *						used to separate this method from the actual
+ *						i/o.
+ */
+
+void SWCipher::Decode(void)
+{
+	if (cipher) {
+		work = master;
+		unsigned long i;
+		for (i = 0; i < len; i++)
+			buf[i] = work.decrypt(buf[i]);
+		buf[i] = 0;
+		cipher = false;
+	}
+}
+
+
+/******************************************************************************
+ * SWCipher::setCipherKey	- setter for a new CipherKey
+ *
+ */
+
+void SWCipher::setCipherKey(const char *ikey) {
+	unsigned char *key = (unsigned char *)ikey;
+	master.initialize(key, strlen((char *)key));
+}
+
+SWORD_NAMESPACE_END