* pppcrypt.c - PPP/DES linkage for MS-CHAP and EAP SRP-SHA1
*
* Extracted from chap_ms.c by James Carlson.
+ * Updated to better reflect RFC2759 by Eivind Naess
*
+ * Copyright (c) 2022 Eivind Naess. All rights reserved.
* Copyright (c) 1995 Eric Rosenquist. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
+#ifndef PPP_PPPCRYPT_H
+#define PPP_PPPCRYPT_H
-#ifndef PPPCRYPT_H
-#define PPPCRYPT_H
+#include "pppdconf.h"
-#ifdef HAVE_CRYPT_H
-#include <crypt.h>
-#endif
-
-#ifndef USE_CRYPT
-#include <des.h>
-#endif
+/**
+ * This is the DES encrypt functions as described by RFC2759.
+ *
+ * Parameters:
+ * unsigned char *clear:
+ * A 8 byte input array to be encrypted
+ *
+ * unsigned char *key:
+ * A raw 7-byte array to be expanded to 8 with odd-parity
+ *
+ * unsigned char *cipher:
+ * A 8 byte outut array providing space for the output data
+ *
+ * DesEncrypt returns 1 on success
+ */
+int DesEncrypt(unsigned char *clear, unsigned char *key,
+ unsigned char *cipher);
-extern bool DesSetkey(u_char *);
-extern bool DesEncrypt(u_char *, u_char *);
-extern bool DesDecrypt(u_char *, u_char *);
+/**
+ * This is the DES decrypt functions as described by RFC2759.
+ *
+ * Parameters:
+ * unsigned char *cipher:
+ * A 8 byte input array to be decrypted
+ *
+ * unsigned char *key:
+ * A raw 7-byte array to be expanded to a 8-byte key with odd-parity
+ *
+ * unsigned char *clear:
+ * A 8 byte output array providing space for the output data
+ *
+ * DesDecrypt returns 1 on success
+ */
+int DesDecrypt(unsigned char *cipher, unsigned char *key,
+ unsigned char *clear);
-#endif /* PPPCRYPT_H */
+#endif /* PPP_PPPCRYPT_H */