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      1 /*
      2  * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
      3  *
      4  * Licensed under the Apache License 2.0 (the "License").  You may not use
      5  * this file except in compliance with the License.  You can obtain a copy
      6  * in the file LICENSE in the source distribution or at
      7  * https://www.openssl.org/source/license.html
      8  */
      9 
     10 /*
     11  * MD4 low level APIs are deprecated for public use, but still ok for
     12  * internal use.
     13  */
     14 #include "internal/deprecated.h"
     15 
     16 #include <stdio.h>
     17 #include <string.h>
     18 #include <openssl/md4.h>
     19 #include <openssl/crypto.h>
     20 
     21 #ifdef CHARSET_EBCDIC
     22 # include <openssl/ebcdic.h>
     23 #endif
     24 
     25 unsigned char *MD4(const unsigned char *d, size_t n, unsigned char *md)
     26 {
     27     MD4_CTX c;
     28     static unsigned char m[MD4_DIGEST_LENGTH];
     29 
     30     if (md == NULL)
     31         md = m;
     32     if (!MD4_Init(&c))
     33         return NULL;
     34 #ifndef CHARSET_EBCDIC
     35     MD4_Update(&c, d, n);
     36 #else
     37     {
     38         char temp[1024];
     39         unsigned long chunk;
     40 
     41         while (n > 0) {
     42             chunk = (n > sizeof(temp)) ? sizeof(temp) : n;
     43             ebcdic2ascii(temp, d, chunk);
     44             MD4_Update(&c, temp, chunk);
     45             n -= chunk;
     46             d += chunk;
     47         }
     48     }
     49 #endif
     50     MD4_Final(md, &c);
     51     OPENSSL_cleanse(&c, sizeof(c)); /* security consideration */
     52     return md;
     53 }
     54