/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include <des_int.h>
#include <sys/crypto/api.h>

#include <sys/callb.h>
#include <sys/uio.h>
#include <sys/cmn_err.h>

int
k5_ef_crypto(const char *in, char *out,
        long length, krb5_keyblock *key,
        const krb5_data *ivec, int encrypt_flag)
{
        int rv = CRYPTO_FAILED;

        crypto_mechanism_t mech;
        crypto_data_t d1, d2;

        ASSERT(in != NULL);
        ASSERT(out != NULL);
        ASSERT(key != NULL);
        ASSERT(key->contents != NULL);

        bzero(&d1, sizeof (d1));
        bzero(&d2, sizeof (d2));

        d1.cd_format = CRYPTO_DATA_RAW;
        d1.cd_offset = 0;
        d1.cd_length = length;
        d1.cd_raw.iov_base = (char *)in;
        d1.cd_raw.iov_len = length;

        d2.cd_format = CRYPTO_DATA_RAW;
        d2.cd_offset = 0;
        d2.cd_length = length;
        d2.cd_raw.iov_base = (char *)out;
        d2.cd_raw.iov_len = length;

        mech.cm_type = key->kef_mt;
        if (mech.cm_type == CRYPTO_MECH_INVALID) {
                KRB5_LOG(KRB5_ERR,
                    "k5_ef_crypto - invalid crypto mech type: 0x%llx",
                    (long long)key->kef_mt);
                return (CRYPTO_FAILED);
        }

        if (ivec != NULL) {
                mech.cm_param_len = ivec->length;
                mech.cm_param = (char *)ivec->data;
        } else {
                mech.cm_param_len = 0;
                mech.cm_param = NULL;
        }

        if (encrypt_flag)
                rv = crypto_encrypt(&mech, &d1,
                                    &key->kef_key,
                                    key->key_tmpl,
                                    (in != out ? &d2 : NULL),
                                    NULL);
        else
                rv = crypto_decrypt(&mech, &d1,
                                    &key->kef_key,
                                    key->key_tmpl,
                                    (in != out ? &d2 : NULL),
                                    NULL);

        if (rv != CRYPTO_SUCCESS) {
                KRB5_LOG1(KRB5_ERR,
                        "k5_ef_crypto: %s error: rv = 0x%08x",
                        (encrypt_flag ? "encrypt" : "decrypt"),
                        rv);
                return (CRYPTO_FAILED);
        }

        return (0);
}