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/*
* Copyright 1995 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*/
#include "k5-int.h"
/*
* This routine takes a key and a krb5_enc_data structure as input, and
* outputs the decrypted data in a krb5_data structure. Note that
* the krb5_data structure is not allocated.
*/
krb5_error_code
krb5_decrypt_data(context, key, ivec, enc_data, data)
krb5_context context;
krb5_keyblock * key;
krb5_pointer ivec;
krb5_enc_data * enc_data;
krb5_data * data;
{
krb5_error_code retval;
krb5_encrypt_block eblock;
krb5_use_enctype(context, &eblock, key->enctype);
data->length = enc_data->ciphertext.length;
if (!(data->data = malloc(data->length)))
return ENOMEM;
if ((retval = krb5_process_key(context, &eblock, key)) != 0)
goto cleanup;
if ((retval = krb5_decrypt(context,
(krb5_pointer) enc_data->ciphertext.data,
(krb5_pointer) data->data,
enc_data->ciphertext.length, &eblock, ivec))) {
krb5_finish_key(context, &eblock);
goto cleanup;
}
(void) krb5_finish_key(context, &eblock);
return 0;
cleanup:
if (data->data) {
free(data->data);
data->data = 0;
}
return retval;
}
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