support --without-openssl at configure time

Disables and removes dependency on OpenSSL. Many features don't
work and the set of crypto options is greatly restricted. This
will only work on system with native arc4random or /dev/urandom.

Considered highly experimental for now.

1 files changed, 51 insertions, 0 deletions

diff --git a/openbsd-compat/md5.h b/openbsd-compat/md5.h
new file mode 100644
index 000000000..c83c19dca
--- /dev/null
+++ b/openbsd-compat/md5.h
@@ -0,0 +1,51 @@
+/*      $OpenBSD: md5.h,v 1.17 2012/12/05 23:19:57 deraadt Exp $        */
+
+/*
+ * This code implements the MD5 message-digest algorithm.
+ * The algorithm is due to Ron Rivest.  This code was
+ * written by Colin Plumb in 1993, no copyright is claimed.
+ * This code is in the public domain; do with it what you wish.
+ *
+ * Equivalent code is available from RSA Data Security, Inc.
+ * This code has been tested against that, and is equivalent,
+ * except that you don't need to include two pages of legalese
+ * with every copy.
+ */
+
+#ifndef _MD5_H_
+#define _MD5_H_
+
+#ifndef WITH_OPENSSL
+
+#define MD5_BLOCK_LENGTH                64
+#define MD5_DIGEST_LENGTH               16
+#define MD5_DIGEST_STRING_LENGTH        (MD5_DIGEST_LENGTH * 2 + 1)
+
+typedef struct MD5Context {
+        u_int32_t state[4];                     /* state */
+        u_int64_t count;                        /* number of bits, mod 2^64 */
+        u_int8_t buffer[MD5_BLOCK_LENGTH];      /* input buffer */
+} MD5_CTX;
+
+void     MD5Init(MD5_CTX *);
+void     MD5Update(MD5_CTX *, const u_int8_t *, size_t)
+                __attribute__((__bounded__(__string__,2,3)));
+void     MD5Pad(MD5_CTX *);
+void     MD5Final(u_int8_t [MD5_DIGEST_LENGTH], MD5_CTX *)
+                __attribute__((__bounded__(__minbytes__,1,MD5_DIGEST_LENGTH)));
+void     MD5Transform(u_int32_t [4], const u_int8_t [MD5_BLOCK_LENGTH])
+                __attribute__((__bounded__(__minbytes__,1,4)))
+                __attribute__((__bounded__(__minbytes__,2,MD5_BLOCK_LENGTH)));
+char    *MD5End(MD5_CTX *, char *)
+                __attribute__((__bounded__(__minbytes__,2,MD5_DIGEST_STRING_LENGTH)));
+char    *MD5File(const char *, char *)
+                __attribute__((__bounded__(__minbytes__,2,MD5_DIGEST_STRING_LENGTH)));
+char    *MD5FileChunk(const char *, char *, off_t, off_t)
+                __attribute__((__bounded__(__minbytes__,2,MD5_DIGEST_STRING_LENGTH)));
+char    *MD5Data(const u_int8_t *, size_t, char *)
+                __attribute__((__bounded__(__string__,1,2)))
+                __attribute__((__bounded__(__minbytes__,3,MD5_DIGEST_STRING_LENGTH)));
+
+#endif /* !WITH_OPENSSL */
+
+#endif /* _MD5_H_ */