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application/sp-console(down)/Common/.svn/pristine/39/39289613dc5ce5b9d548f4426e19844dbe8c2fb2.svn-base

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+/*
+ * Copyright (C) 1998,1999,2000,2001 Nikos Mavroyanopoulos
+ * 
+ * This library is free software; you can redistribute it and/or modify it 
+ * under the terms of the GNU Library General Public License as published 
+ * by the Free Software Foundation; either version 2 of the License, or 
+ * (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <libdefs.h>
+#include <mcrypt_modules.h>
+
+#define _init_mcrypt cbc_LTX__init_mcrypt
+#define _mcrypt_set_state cbc_LTX__mcrypt_set_state
+#define _mcrypt_get_state cbc_LTX__mcrypt_get_state
+#define _end_mcrypt cbc_LTX__end_mcrypt
+#define _mcrypt cbc_LTX__mcrypt
+#define _mdecrypt cbc_LTX__mdecrypt
+#define _has_iv cbc_LTX__has_iv
+#define _is_block_mode cbc_LTX__is_block_mode
+#define _is_block_algorithm_mode cbc_LTX__is_block_algorithm_mode
+#define _mcrypt_get_modes_name cbc_LTX__mcrypt_get_modes_name
+#define _mcrypt_mode_get_size cbc_LTX__mcrypt_mode_get_size
+#define _mcrypt_mode_version cbc_LTX__mcrypt_mode_version
+
+typedef struct cbc_buf {
+	word32 *previous_ciphertext;
+	word32 *previous_cipher;
+	int blocksize;
+} CBC_BUFFER;
+
+/* CBC MODE */
+
+
+int _init_mcrypt( CBC_BUFFER* buf,void *key, int lenofkey, void *IV, int size)
+{
+/* For cbc */
+	buf->previous_ciphertext =
+	buf->previous_cipher = NULL;
+
+	buf->blocksize = size;
+		
+	buf->previous_ciphertext = malloc( size);
+	buf->previous_cipher = malloc( size);
+	
+	if (buf->previous_ciphertext==NULL ||
+		buf->previous_cipher==NULL) goto freeall;
+	
+	if (IV!=NULL) {
+		memcpy(buf->previous_ciphertext, IV, size);
+	} else {
+	        memset(buf->previous_ciphertext, 0, size);
+	}
+
+	return 0;
+
+	freeall:
+		free(buf->previous_ciphertext);
+		free(buf->previous_cipher);
+		return -1;
+}
+
+int _mcrypt_set_state( CBC_BUFFER* buf, void *IV, int size)
+{
+/* For cbc */
+
+	memcpy(buf->previous_ciphertext, IV, size);
+	memcpy(buf->previous_cipher, IV, size);
+ 
+	return 0;
+}
+
+int _mcrypt_get_state( CBC_BUFFER* buf, void *IV, int *size)
+{
+	if (*size < buf->blocksize) {
+		*size = buf->blocksize;
+		return -1;
+	}
+	*size = buf->blocksize;
+
+	memcpy( IV, buf->previous_ciphertext, buf->blocksize);
+
+	return 0;
+}
+
+
+void _end_mcrypt( CBC_BUFFER* buf) {
+	free(buf->previous_ciphertext);
+	free(buf->previous_cipher);
+}
+
+int _mcrypt( CBC_BUFFER* buf, void *plaintext, int len, int blocksize, void* akey, void (*func)(void*,void*), void (*func2)(void*,void*))
+{
+	word32 *fplain = plaintext;
+	word32 *plain;
+	int i, j; 
+	void (*_mcrypt_block_encrypt) (void *, void *);
+
+	_mcrypt_block_encrypt = func;
+	
+	for (j = 0; j < len / blocksize; j++) {
+
+		plain = &fplain[j * blocksize / sizeof(word32)];
+
+		for (i = 0; i < blocksize / sizeof(word32); i++) {
+			plain[i] ^= buf->previous_ciphertext[i];
+		}
+
+		_mcrypt_block_encrypt(akey, plain);
+
+		/* Copy the ciphertext to prev_ciphertext */
+		memcpy(buf->previous_ciphertext, plain, blocksize);
+	}
+	if (j==0 && len!=0) return -1;
+	return 0;
+}
+
+
+
+int _mdecrypt( CBC_BUFFER* buf, void *ciphertext, int len, int blocksize,void* akey, void (*func)(void*,void*), void (*func2)(void*,void*))
+{
+	word32 *cipher;
+	word32 *fcipher = ciphertext;
+	int i, j; 
+	void (*_mcrypt_block_decrypt) (void *, void *);
+
+	_mcrypt_block_decrypt = func2;
+
+
+	for (j = 0; j < len / blocksize; j++) {
+
+		cipher = &fcipher[j * blocksize / sizeof(word32)];
+		memcpy(buf->previous_cipher, cipher, blocksize);
+
+		_mcrypt_block_decrypt(akey, cipher);
+		for (i = 0; i < blocksize / sizeof(word32); i++) {
+			cipher[i] ^= buf->previous_ciphertext[i];
+		}
+
+		/* Copy the ciphertext to prev_cipher */
+		memcpy(buf->previous_ciphertext, buf->previous_cipher, blocksize);
+
+	}
+	if (j==0 && len!=0) return -1;
+	return 0;
+}
+
+int _has_iv() { return 1; }
+int _is_block_mode() { return 1; }
+int _is_block_algorithm_mode() { return 1; }
+const char *_mcrypt_get_modes_name() { return "CBC";}
+int _mcrypt_mode_get_size () {return sizeof(CBC_BUFFER);}
+
+word32 _mcrypt_mode_version() {
+	return 20010801;
+}
+
+
+#ifdef WIN32
+# ifdef USE_LTDL
+WIN32DLL_DEFINE int main (void)
+{
+       /* empty main function to avoid linker error (see cygwin FAQ) */
+}
+# endif
+#endif