--- /dev/null
+#ifndef MD5_H
+#define MD5_H
+
+struct MD5Context {
+ u_int32_t buf[4];
+ u_int32_t bits[2];
+ unsigned char in[64];
+};
+
+void MD5Init(struct MD5Context *context);
+void MD5Update(struct MD5Context *context, unsigned char const *buf,
+ unsigned len);
+void MD5Final(unsigned char digest[16], struct MD5Context *context);
+void MD5Transform(u_int32_t buf[4], u_int32_t const in[16]);
+char *make_apop_string(char *realpass, char *nonce, u_char *buffer);
+
+/*
+ * This is needed to make RSAREF happy on some MS-DOS compilers.
+ */
+typedef struct MD5Context MD5_CTX;
+
+#define MD5_DIGEST_LEN 16
+#define MD5_HEXSTRING_SIZE 33
+
+#endif /* !MD5_H */