Temporarily revive MD4 for MS CHAP support.

4 files changed, 455 insertions, 0 deletions

diff --git a/src/lib/libcrypto/md4/md4.h b/src/lib/libcrypto/md4/md4.h
new file mode 100644
index 0000000000..04aacc9801
--- /dev/null
+++ b/src/lib/libcrypto/md4/md4.h
@@ -0,0 +1,103 @@
+/* $OpenBSD: md4.h,v 1.16 2015/09/14 01:45:03 doug Exp $ */
+/* 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.]
+ */
+
+#include <stddef.h>
+
+#ifndef HEADER_MD4_H
+#define HEADER_MD4_H
+
+#include <openssl/opensslconf.h>
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#ifdef OPENSSL_NO_MD4
+#error MD4 is disabled.
+#endif
+
+/*
+ * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+ * ! MD4_LONG has to be at least 32 bits wide.                     !
+ * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+ */
+
+#define MD4_LONG unsigned int
+
+#define MD4_CBLOCK      64
+#define MD4_LBLOCK      (MD4_CBLOCK/4)
+#define MD4_DIGEST_LENGTH 16
+
+typedef struct MD4state_st
+        {
+        MD4_LONG A,B,C,D;
+        MD4_LONG Nl,Nh;
+        MD4_LONG data[MD4_LBLOCK];
+        unsigned int num;
+        } MD4_CTX;
+
+int MD4_Init(MD4_CTX *c);
+int MD4_Update(MD4_CTX *c, const void *data, size_t len);
+int MD4_Final(unsigned char *md, MD4_CTX *c);
+unsigned char *MD4(const unsigned char *d, size_t n, unsigned char *md);
+void MD4_Transform(MD4_CTX *c, const unsigned char *b);
+#ifdef  __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/lib/libcrypto/md4/md4_dgst.c b/src/lib/libcrypto/md4/md4_dgst.c
new file mode 100644
index 0000000000..4d3801fc26
--- /dev/null
+++ b/src/lib/libcrypto/md4/md4_dgst.c
@@ -0,0 +1,167 @@
+/* $OpenBSD: md4_dgst.c,v 1.16 2015/09/14 01:45:03 doug Exp $ */
+/* 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.]
+ */
+
+#include <stdio.h>
+#include <openssl/opensslv.h>
+#include <openssl/crypto.h>
+#include "md4_locl.h"
+
+/* Implemented from RFC1186 The MD4 Message-Digest Algorithm
+ */
+
+#define INIT_DATA_A (unsigned long)0x67452301L
+#define INIT_DATA_B (unsigned long)0xefcdab89L
+#define INIT_DATA_C (unsigned long)0x98badcfeL
+#define INIT_DATA_D (unsigned long)0x10325476L
+
+int MD4_Init(MD4_CTX *c)
+        {
+        memset (c,0,sizeof(*c));
+        c->A=INIT_DATA_A;
+        c->B=INIT_DATA_B;
+        c->C=INIT_DATA_C;
+        c->D=INIT_DATA_D;
+        return 1;
+        }
+
+#ifndef md4_block_data_order
+#ifdef X
+#undef X
+#endif
+void md4_block_data_order (MD4_CTX *c, const void *data_, size_t num)
+        {
+        const unsigned char *data=data_;
+        unsigned MD32_REG_T A,B,C,D,l;
+#ifndef MD32_XARRAY
+        /* See comment in crypto/sha/sha_locl.h for details. */
+        unsigned MD32_REG_T     XX0, XX1, XX2, XX3, XX4, XX5, XX6, XX7,
+                                XX8, XX9,XX10,XX11,XX12,XX13,XX14,XX15;
+# define X(i)   XX##i
+#else
+        MD4_LONG XX[MD4_LBLOCK];
+# define X(i)   XX[i]
+#endif
+
+        A=c->A;
+        B=c->B;
+        C=c->C;
+        D=c->D;
+
+        for (;num--;)
+                {
+        HOST_c2l(data,l); X( 0)=l;
+        HOST_c2l(data,l); X( 1)=l;
+        /* Round 0 */
+        R0(A,B,C,D,X( 0), 3,0); HOST_c2l(data,l); X( 2)=l;
+        R0(D,A,B,C,X( 1), 7,0); HOST_c2l(data,l); X( 3)=l;
+        R0(C,D,A,B,X( 2),11,0); HOST_c2l(data,l); X( 4)=l;
+        R0(B,C,D,A,X( 3),19,0); HOST_c2l(data,l); X( 5)=l;
+        R0(A,B,C,D,X( 4), 3,0); HOST_c2l(data,l); X( 6)=l;
+        R0(D,A,B,C,X( 5), 7,0); HOST_c2l(data,l); X( 7)=l;
+        R0(C,D,A,B,X( 6),11,0); HOST_c2l(data,l); X( 8)=l;
+        R0(B,C,D,A,X( 7),19,0); HOST_c2l(data,l); X( 9)=l;
+        R0(A,B,C,D,X( 8), 3,0); HOST_c2l(data,l); X(10)=l;
+        R0(D,A,B,C,X( 9), 7,0); HOST_c2l(data,l); X(11)=l;
+        R0(C,D,A,B,X(10),11,0); HOST_c2l(data,l); X(12)=l;
+        R0(B,C,D,A,X(11),19,0); HOST_c2l(data,l); X(13)=l;
+        R0(A,B,C,D,X(12), 3,0); HOST_c2l(data,l); X(14)=l;
+        R0(D,A,B,C,X(13), 7,0); HOST_c2l(data,l); X(15)=l;
+        R0(C,D,A,B,X(14),11,0);
+        R0(B,C,D,A,X(15),19,0);
+        /* Round 1 */
+        R1(A,B,C,D,X( 0), 3,0x5A827999L);
+        R1(D,A,B,C,X( 4), 5,0x5A827999L);
+        R1(C,D,A,B,X( 8), 9,0x5A827999L);
+        R1(B,C,D,A,X(12),13,0x5A827999L);
+        R1(A,B,C,D,X( 1), 3,0x5A827999L);
+        R1(D,A,B,C,X( 5), 5,0x5A827999L);
+        R1(C,D,A,B,X( 9), 9,0x5A827999L);
+        R1(B,C,D,A,X(13),13,0x5A827999L);
+        R1(A,B,C,D,X( 2), 3,0x5A827999L);
+        R1(D,A,B,C,X( 6), 5,0x5A827999L);
+        R1(C,D,A,B,X(10), 9,0x5A827999L);
+        R1(B,C,D,A,X(14),13,0x5A827999L);
+        R1(A,B,C,D,X( 3), 3,0x5A827999L);
+        R1(D,A,B,C,X( 7), 5,0x5A827999L);
+        R1(C,D,A,B,X(11), 9,0x5A827999L);
+        R1(B,C,D,A,X(15),13,0x5A827999L);
+        /* Round 2 */
+        R2(A,B,C,D,X( 0), 3,0x6ED9EBA1L);
+        R2(D,A,B,C,X( 8), 9,0x6ED9EBA1L);
+        R2(C,D,A,B,X( 4),11,0x6ED9EBA1L);
+        R2(B,C,D,A,X(12),15,0x6ED9EBA1L);
+        R2(A,B,C,D,X( 2), 3,0x6ED9EBA1L);
+        R2(D,A,B,C,X(10), 9,0x6ED9EBA1L);
+        R2(C,D,A,B,X( 6),11,0x6ED9EBA1L);
+        R2(B,C,D,A,X(14),15,0x6ED9EBA1L);
+        R2(A,B,C,D,X( 1), 3,0x6ED9EBA1L);
+        R2(D,A,B,C,X( 9), 9,0x6ED9EBA1L);
+        R2(C,D,A,B,X( 5),11,0x6ED9EBA1L);
+        R2(B,C,D,A,X(13),15,0x6ED9EBA1L);
+        R2(A,B,C,D,X( 3), 3,0x6ED9EBA1L);
+        R2(D,A,B,C,X(11), 9,0x6ED9EBA1L);
+        R2(C,D,A,B,X( 7),11,0x6ED9EBA1L);
+        R2(B,C,D,A,X(15),15,0x6ED9EBA1L);
+
+        A = c->A += A;
+        B = c->B += B;
+        C = c->C += C;
+        D = c->D += D;
+                }
+        }
+#endif
diff --git a/src/lib/libcrypto/md4/md4_locl.h b/src/lib/libcrypto/md4/md4_locl.h
new file mode 100644
index 0000000000..ef574c040d
--- /dev/null
+++ b/src/lib/libcrypto/md4/md4_locl.h
@@ -0,0 +1,108 @@
+/* $OpenBSD: md4_locl.h,v 1.9 2015/09/14 01:45:03 doug Exp $ */
+/* 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.]
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <openssl/opensslconf.h>
+#include <openssl/md4.h>
+
+void md4_block_data_order (MD4_CTX *c, const void *p,size_t num);
+
+#define DATA_ORDER_IS_LITTLE_ENDIAN
+
+#define HASH_LONG               MD4_LONG
+#define HASH_CTX                MD4_CTX
+#define HASH_CBLOCK             MD4_CBLOCK
+#define HASH_UPDATE             MD4_Update
+#define HASH_TRANSFORM          MD4_Transform
+#define HASH_FINAL              MD4_Final
+#define HASH_MAKE_STRING(c,s)   do {    \
+        unsigned long ll;               \
+        ll=(c)->A; HOST_l2c(ll,(s));    \
+        ll=(c)->B; HOST_l2c(ll,(s));    \
+        ll=(c)->C; HOST_l2c(ll,(s));    \
+        ll=(c)->D; HOST_l2c(ll,(s));    \
+        } while (0)
+#define HASH_BLOCK_DATA_ORDER   md4_block_data_order
+
+#include "md32_common.h"
+
+/*
+#define F(x,y,z)        (((x) & (y))  |  ((~(x)) & (z)))
+#define G(x,y,z)        (((x) & (y))  |  ((x) & ((z))) | ((y) & ((z))))
+*/
+
+/* As pointed out by Wei Dai <weidai@eskimo.com>, the above can be
+ * simplified to the code below.  Wei attributes these optimizations
+ * to Peter Gutmann's SHS code, and he attributes it to Rich Schroeppel.
+ */
+#define F(b,c,d)        ((((c) ^ (d)) & (b)) ^ (d))
+#define G(b,c,d)        (((b) & (c)) | ((b) & (d)) | ((c) & (d)))
+#define H(b,c,d)        ((b) ^ (c) ^ (d))
+
+#define R0(a,b,c,d,k,s,t) { \
+        a+=((k)+(t)+F((b),(c),(d))); \
+        a=ROTATE(a,s); };
+
+#define R1(a,b,c,d,k,s,t) { \
+        a+=((k)+(t)+G((b),(c),(d))); \
+        a=ROTATE(a,s); };\
+
+#define R2(a,b,c,d,k,s,t) { \
+        a+=((k)+(t)+H((b),(c),(d))); \
+        a=ROTATE(a,s); };
diff --git a/src/lib/libcrypto/md4/md4_one.c b/src/lib/libcrypto/md4/md4_one.c
new file mode 100644
index 0000000000..c1fd6f3e52
--- /dev/null
+++ b/src/lib/libcrypto/md4/md4_one.c
@@ -0,0 +1,77 @@
+/* $OpenBSD: md4_one.c,v 1.10 2015/09/14 01:45:03 doug Exp $ */
+/* 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.]
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <openssl/md4.h>
+#include <openssl/crypto.h>
+
+unsigned char *MD4(const unsigned char *d, size_t n, unsigned char *md)
+        {
+        MD4_CTX c;
+        static unsigned char m[MD4_DIGEST_LENGTH];
+
+        if (md == NULL) md=m;
+        if (!MD4_Init(&c))
+                return NULL;
+        MD4_Update(&c,d,n);
+        MD4_Final(md,&c);
+        explicit_bzero(&c,sizeof(c));
+        return(md);
+        }
+