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/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
#include "k5-int.h"
#include "k5-utf8.h"
#include "rsa-md4.h"
#include "arcfour-int.h"
#if TARGET_OS_MAC && !defined(DEPEND)
#include <CoreFoundation/CFString.h>
#endif
krb5_error_code
krb5int_arcfour_string_to_key(const struct krb5_keytypes *ktp,
const krb5_data *string, const krb5_data *salt,
const krb5_data *params, krb5_keyblock *key)
{
krb5_error_code err = 0;
krb5_MD4_CTX md4_context;
unsigned char *copystr;
size_t copystrlen;
if (params != NULL)
return KRB5_ERR_BAD_S2K_PARAMS;
if (key->length != 16)
return (KRB5_BAD_MSIZE);
/* We ignore salt per the Microsoft spec*/
/* compute the space needed for the new string.
Since the password must be stored in unicode, we need to increase
that number by 2x.
*/
err = krb5int_utf8cs_to_ucs2les(string->data, string->length, ©str, ©strlen);
if (err)
return err;
/* the actual MD4 hash of the data */
krb5int_MD4Init(&md4_context);
krb5int_MD4Update(&md4_context, copystr, copystrlen);
krb5int_MD4Final(&md4_context);
memcpy(key->contents, md4_context.digest, 16);
#if 0
/* test the string_to_key function */
printf("Hash=");
{
int counter;
for(counter=0;counter<16;counter++)
printf("%02x", md4_context.digest[counter]);
printf("\n");
}
#endif /* 0 */
/* Zero out the data behind us */
memset(copystr, 0, copystrlen);
memset(&md4_context, 0, sizeof(md4_context));
free(copystr);
return err;
}
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