/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
 * COPYRIGHT (C) 2006
 * THE REGENTS OF THE UNIVERSITY OF MICHIGAN
 * ALL RIGHTS RESERVED
 *
 * Permission is granted to use, copy, create derivative works
 * and redistribute this software and such derivative works
 * for any purpose, so long as the name of The University of
 * Michigan is not used in any advertising or publicity
 * pertaining to the use of distribution of this software
 * without specific, written prior authorization.  If the
 * above copyright notice or any other identification of the
 * University of Michigan is included in any copy of any
 * portion of this software, then the disclaimer below must
 * also be included.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION
 * FROM THE UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY
 * PURPOSE, AND WITHOUT WARRANTY BY THE UNIVERSITY OF
 * MICHIGAN OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
 * WITHOUT LIMITATION THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
 * REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE LIABLE
 * FOR ANY DAMAGES, INCLUDING SPECIAL, INDIRECT, INCIDENTAL, OR
 * CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF
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 */

#ifndef _KRB5_INT_PKINIT_H
#define _KRB5_INT_PKINIT_H

/*
 * pkinit structures
 */

/* PKAuthenticator */
typedef struct _krb5_pk_authenticator {
    krb5_int32      cusec;  /* (0..999999) */
    krb5_timestamp  ctime;
    krb5_int32      nonce;  /* (0..4294967295) */
    krb5_checksum   paChecksum;
    krb5_data      *freshnessToken;
} krb5_pk_authenticator;

/* AlgorithmIdentifier */
typedef struct _krb5_algorithm_identifier {
    krb5_data algorithm;      /* OID */
    krb5_data parameters; /* Optional */
} krb5_algorithm_identifier;

/* SubjectPublicKeyInfo */
typedef struct _krb5_subject_pk_info {
    krb5_algorithm_identifier   algorithm;
    krb5_data                   subjectPublicKey; /* BIT STRING */
} krb5_subject_pk_info;

/** AuthPack from RFC 4556*/
typedef struct _krb5_auth_pack {
    krb5_pk_authenticator       pkAuthenticator;
    krb5_subject_pk_info        *clientPublicValue; /* Optional */
    krb5_algorithm_identifier   **supportedCMSTypes; /* Optional */
    krb5_data                   clientDHNonce; /* Optional */
    krb5_data                   **supportedKDFs; /* OIDs of KDFs; OPTIONAL */
} krb5_auth_pack;

/* ExternalPrincipalIdentifier */
typedef struct _krb5_external_principal_identifier {
    krb5_data subjectName; /* Optional */
    krb5_data issuerAndSerialNumber; /* Optional */
    krb5_data subjectKeyIdentifier; /* Optional */
} krb5_external_principal_identifier;

/* PA-PK-AS-REQ (rfc4556 -- PA TYPE 16) */
typedef struct _krb5_pa_pk_as_req {
    krb5_data signedAuthPack;
    krb5_external_principal_identifier **trustedCertifiers; /* Optional array */
    krb5_data kdcPkId; /* Optional */
} krb5_pa_pk_as_req;

/** Pkinit DHRepInfo */
typedef struct _krb5_dh_rep_info {
    krb5_data dhSignedData;
    krb5_data serverDHNonce; /* Optional */
    krb5_data *kdfID; /* OID of selected KDF OPTIONAL */
} krb5_dh_rep_info;

/* KDCDHKeyInfo */
typedef struct _krb5_kdc_dh_key_info {
    krb5_data       subjectPublicKey; /* BIT STRING */
    krb5_int32      nonce;  /* (0..4294967295) */
    krb5_timestamp  dhKeyExpiration; /* Optional */
} krb5_kdc_dh_key_info;

/* ReplyKeyPack */
typedef struct _krb5_reply_key_pack {
    krb5_keyblock   replyKey;
    krb5_checksum   asChecksum;
} krb5_reply_key_pack;

/* PA-PK-AS-REP (rfc4556 -- PA TYPE 17) */
typedef struct _krb5_pa_pk_as_rep {
    enum krb5_pa_pk_as_rep_selection {
        choice_pa_pk_as_rep_UNKNOWN = -1,
        choice_pa_pk_as_rep_dhInfo = 0,
        choice_pa_pk_as_rep_encKeyPack = 1
    } choice;
    union krb5_pa_pk_as_rep_choices {
        krb5_dh_rep_info    dh_Info;
        krb5_data           encKeyPack;
    } u;
} krb5_pa_pk_as_rep;

/* SP80056A OtherInfo, for pkinit algorithm agility */
typedef struct _krb5_sp80056a_other_info {
    krb5_algorithm_identifier algorithm_identifier;
    krb5_principal  party_u_info;
    krb5_principal  party_v_info;
    krb5_data supp_pub_info;
} krb5_sp80056a_other_info;

/* PkinitSuppPubInfo, for pkinit algorithm agility */
typedef struct _krb5_pkinit_supp_pub_info {
    krb5_enctype      enctype;
    krb5_data         as_req;
    krb5_data         pk_as_rep;
} krb5_pkinit_supp_pub_info;

/*
 * Begin "asn1.h"
 */

/*************************************************************************
 * Prototypes for pkinit asn.1 encode routines
 *************************************************************************/

krb5_error_code
encode_krb5_pa_pk_as_req(const krb5_pa_pk_as_req *rep, krb5_data **code);

krb5_error_code
encode_krb5_pa_pk_as_rep(const krb5_pa_pk_as_rep *rep, krb5_data **code);

krb5_error_code
encode_krb5_auth_pack(const krb5_auth_pack *rep, krb5_data **code);

krb5_error_code
encode_krb5_kdc_dh_key_info(const krb5_kdc_dh_key_info *rep, krb5_data **code);

krb5_error_code
encode_krb5_reply_key_pack(const krb5_reply_key_pack *, krb5_data **code);

krb5_error_code
encode_krb5_td_trusted_certifiers(krb5_external_principal_identifier *const *,
                                  krb5_data **code);

krb5_error_code
encode_krb5_td_dh_parameters(krb5_algorithm_identifier *const *,
                             krb5_data **code);

krb5_error_code
encode_krb5_sp80056a_other_info(const krb5_sp80056a_other_info *,
                                krb5_data **);

krb5_error_code
encode_krb5_pkinit_supp_pub_info(const krb5_pkinit_supp_pub_info *,
                                 krb5_data **);

/*************************************************************************
 * Prototypes for pkinit asn.1 decode routines
 *************************************************************************/

krb5_error_code
decode_krb5_pa_pk_as_req(const krb5_data *, krb5_pa_pk_as_req **);

krb5_error_code
decode_krb5_pa_pk_as_rep(const krb5_data *, krb5_pa_pk_as_rep **);

krb5_error_code
decode_krb5_auth_pack(const krb5_data *, krb5_auth_pack **);

krb5_error_code
decode_krb5_kdc_dh_key_info(const krb5_data *, krb5_kdc_dh_key_info **);

krb5_error_code
decode_krb5_principal_name(const krb5_data *, krb5_principal_data **);

krb5_error_code
decode_krb5_reply_key_pack(const krb5_data *, krb5_reply_key_pack **);

krb5_error_code
decode_krb5_td_trusted_certifiers(const krb5_data *,
                                  krb5_external_principal_identifier ***);

krb5_error_code
decode_krb5_td_dh_parameters(const krb5_data *, krb5_algorithm_identifier ***);

krb5_error_code
encode_krb5_enc_data(const krb5_enc_data *, krb5_data **);

krb5_error_code
encode_krb5_encryption_key(const krb5_keyblock *rep, krb5_data **code);

krb5_error_code
krb5_encrypt_helper(krb5_context context, const krb5_keyblock *key,
                    krb5_keyusage keyusage, const krb5_data *plain,
                    krb5_enc_data *cipher);

#endif /* _KRB5_INT_PKINIT_H */