--- /dev/null
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.] */
+
+#ifndef OPENSSL_HEADER_MD5_H
+#define OPENSSL_HEADER_MD5_H
+
+#include <openssl/base.h>
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+
+// MD5.
+
+
+// MD5_CBLOCK is the block size of MD5.
+#define MD5_CBLOCK 64
+
+// MD5_DIGEST_LENGTH is the length of an MD5 digest.
+#define MD5_DIGEST_LENGTH 16
+
+// MD5_Init initialises |md5| and returns one.
+OPENSSL_EXPORT int MD5_Init(MD5_CTX *md5);
+
+// MD5_Update adds |len| bytes from |data| to |md5| and returns one.
+OPENSSL_EXPORT int MD5_Update(MD5_CTX *md5, const void *data, size_t len);
+
+// MD5_Final adds the final padding to |md5| and writes the resulting digest to
+// |md|, which must have at least |MD5_DIGEST_LENGTH| bytes of space. It
+// returns one.
+OPENSSL_EXPORT int MD5_Final(uint8_t *md, MD5_CTX *md5);
+
+// MD5 writes the digest of |len| bytes from |data| to |out| and returns |out|.
+// There must be at least |MD5_DIGEST_LENGTH| bytes of space in |out|.
+OPENSSL_EXPORT uint8_t *MD5(const uint8_t *data, size_t len, uint8_t *out);
+
+// MD5_Transform is a low-level function that performs a single, MD5 block
+// transformation using the state from |md5| and 64 bytes from |block|.
+OPENSSL_EXPORT void MD5_Transform(MD5_CTX *md5, const uint8_t *block);
+
+struct md5_state_st {
+ uint32_t h[4];
+ uint32_t Nl, Nh;
+ uint8_t data[MD5_CBLOCK];
+ unsigned num;
+};
+
+
+#if defined(__cplusplus)
+} // extern C
+#endif
+
+#endif // OPENSSL_HEADER_MD5_H
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