Nmap now ships and links with OpenSSL (currently the newest 0.9.8g) on Windows.

The necessary libraries (lib and dll) and headers required for compilation and
linking are in mswin32/OpenSSL.  A detailed upgrade guide is available in
mswin32/OpenSSL/upgrade-guide.txt.

Thanks to Thomas Buchanan for doing the initial work and writing up the initial
build guide.

My openssl-testing branch has been posted on nmap-dev for 12 days and has been
tested by (at least) Thomas, Jah and I, with no reports of failure.

http://seclists.org/nmap-dev/2008/q2/0249.html

mswin32/OpenSSL/include/openssl/ebcdic.h

@@ -0,0 +1,19 @@
+/* crypto/ebcdic.h */
+
+#ifndef HEADER_EBCDIC_H
+#define HEADER_EBCDIC_H
+
+#include <sys/types.h>
+
+/* Avoid name clashes with other applications */
+#define os_toascii   _openssl_os_toascii
+#define os_toebcdic  _openssl_os_toebcdic
+#define ebcdic2ascii _openssl_ebcdic2ascii
+#define ascii2ebcdic _openssl_ascii2ebcdic
+
+extern const unsigned char os_toascii[256];
+extern const unsigned char os_toebcdic[256];
+void *ebcdic2ascii(void *dest, const void *srce, size_t count);
+void *ascii2ebcdic(void *dest, const void *srce, size_t count);
+
+#endif