/* crypto/ts/ts.h */
/* Written by Zoltan Glozik (zglozik@opentsa.org) for the OpenSSL
 * project 2002, 2003, 2004.
 */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *   software must display the following acknowledgment:
 *   "This product includes software developed by the OpenSSL Project
 *   for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *   endorse or promote products derived from this software without
 *   prior written permission. For written permission, please contact
 *   licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *   nor may "OpenSSL" appear in their names without prior written
 *   permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *   acknowledgment:
 *   "This product includes software developed by the OpenSSL Project
 *   for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

module deimos.openssl.ts;

import deimos.openssl._d_util;

public import deimos.openssl.opensslconf;
public import deimos.openssl.symhacks;
version(OPENSSL_NO_BUFFER) {} else {
public import deimos.openssl.buffer;
}
version(OPENSSL_NO_EVP) {} else {
public import deimos.openssl.evp;
}
version(OPENSSL_NO_BIO) {} else {
public import deimos.openssl.bio;
}
public import deimos.openssl.stack;
public import deimos.openssl.asn1;
public import deimos.openssl.safestack;
public import deimos.openssl.pkcs7;

version(OPENSSL_NO_RSA) {} else {
public import deimos.openssl.rsa;
}

version(OPENSSL_NO_DSA) {} else {
public import deimos.openssl.dsa;
}

version(OPENSSL_NO_DH) {} else {
public import deimos.openssl.dh;
}

public import deimos.openssl.evp;


extern (C):
nothrow:

// #ifdef WIN32
// /* Under Win32 this is defined in wincrypt.h */
// #undef X509_NAME
// #endif

public import deimos.openssl.x509;
public import deimos.openssl.x509v3;

/*
MessageImprint ::= SEQUENCE  {
     hashAlgorithm                AlgorithmIdentifier,
     hashedMessage                OCTET STRING  }
*/

struct TS_msg_imprint_st {
	X509_ALGOR* hash_algo;
	ASN1_OCTET_STRING* hashed_msg;
	}
alias TS_msg_imprint_st TS_MSG_IMPRINT;

/*
TimeStampReq ::= SEQUENCE  {
   version                  INTEGER  { v1(1) },
   messageImprint           MessageImprint,
     --a hash algorithm OID and the hash value of the data to be
     --time-stamped
   reqPolicy                TSAPolicyId                OPTIONAL,
   nonce                    INTEGER                    OPTIONAL,
   certReq                  BOOLEAN                    DEFAULT FALSE,
   extensions               [0] IMPLICIT Extensions    OPTIONAL  }
*/

struct TS_req_st {
	ASN1_INTEGER* version_;
	TS_MSG_IMPRINT* msg_imprint;
	ASN1_OBJECT* policy_id;		/* OPTIONAL */
	ASN1_INTEGER* nonce;		/* OPTIONAL */
	ASN1_BOOLEAN cert_req;		/* DEFAULT FALSE */
	STACK_OF!(X509_EXTENSION) *extensions;	/* [0] OPTIONAL */
	}
alias TS_req_st TS_REQ;

/*
Accuracy ::= SEQUENCE {
                seconds        INTEGER           OPTIONAL,
                millis     [0] INTEGER  (1..999) OPTIONAL,
                micros     [1] INTEGER  (1..999) OPTIONAL  }
*/

struct TS_accuracy_st {
	ASN1_INTEGER* seconds;
	ASN1_INTEGER* millis;
	ASN1_INTEGER* micros;
	}
alias TS_accuracy_st TS_ACCURACY;

/*
TSTInfo ::= SEQUENCE  {
    version                      INTEGER  { v1(1) },
    policy                       TSAPolicyId,
    messageImprint               MessageImprint,
      -- MUST have the same value as the similar field in
      -- TimeStampReq
    serialNumber                 INTEGER,
     -- Time-Stamping users MUST be ready to accommodate integers
     -- up to 160 bits.
    genTime                      GeneralizedTime,
    accuracy                     Accuracy                 OPTIONAL,
    ordering                     BOOLEAN             DEFAULT FALSE,
    nonce                        INTEGER                  OPTIONAL,
      -- MUST be present if the similar field was present
      -- in TimeStampReq.  In that case it MUST have the same value.
    tsa                          [0] GeneralName          OPTIONAL,
    extensions                   [1] IMPLICIT Extensions  OPTIONAL   }
*/

struct TS_tst_info_st {
	ASN1_INTEGER* version_;
	ASN1_OBJECT* policy_id;
	TS_MSG_IMPRINT* msg_imprint;
	ASN1_INTEGER* serial;
	ASN1_GENERALIZEDTIME* time;
	TS_ACCURACY* accuracy;
	ASN1_BOOLEAN ordering;
	ASN1_INTEGER* nonce;
	GENERAL_NAME* tsa;
	STACK_OF!(X509_EXTENSION) *extensions;
	}
alias TS_tst_info_st TS_TST_INFO;

/*
PKIStatusInfo ::= SEQUENCE {
    status        PKIStatus,
    statusString  PKIFreeText     OPTIONAL,
    failInfo      PKIFailureInfo  OPTIONAL  }

From RFC 1510 - section 3.1.1:
PKIFreeText ::= SEQUENCE SIZE (1..MAX) OF UTF8String
	-- text encoded as UTF-8 String (note:  each UTF8String SHOULD
	-- include an RFC 1766 language tag to indicate the language
	-- of the contained text)
*/

/* Possible values for status. See ts_resp_print.c && ts_resp_verify.c. */

enum TS_STATUS_GRANTED = 0;
enum TS_STATUS_GRANTED_WITH_MODS = 1;
enum TS_STATUS_REJECTION = 2;
enum TS_STATUS_WAITING = 3;
enum TS_STATUS_REVOCATION_WARNING = 4;
enum TS_STATUS_REVOCATION_NOTIFICATION = 5;

/* Possible values for failure_info. See ts_resp_print.c && ts_resp_verify.c */

enum TS_INFO_BAD_ALG = 0;
enum TS_INFO_BAD_REQUEST = 2;
enum TS_INFO_BAD_DATA_FORMAT = 5;
enum TS_INFO_TIME_NOT_AVAILABLE = 14;
enum TS_INFO_UNACCEPTED_POLICY = 15;
enum TS_INFO_UNACCEPTED_EXTENSION = 16;
enum TS_INFO_ADD_INFO_NOT_AVAILABLE = 17;
enum TS_INFO_SYSTEM_FAILURE = 25;

struct TS_status_info_st {
	ASN1_INTEGER* status;
	STACK_OF!(ASN1_UTF8STRING) *text;
	ASN1_BIT_STRING* failure_info;
	}
alias TS_status_info_st TS_STATUS_INFO;

/+mixin DECLARE_STACK_OF!(ASN1_UTF8STRING);+/
mixin DECLARE_ASN1_SET_OF!(ASN1_UTF8STRING);

/*
TimeStampResp ::= SEQUENCE  {
     status                  PKIStatusInfo,
     timeStampToken          TimeStampToken     OPTIONAL }
*/

struct TS_resp_st {
	TS_STATUS_INFO* status_info;
	PKCS7* token;
	TS_TST_INFO* tst_info;
	}
alias TS_resp_st TS_RESP;

/* The structure below would belong to the ESS component. */

/*
IssuerSerial ::= SEQUENCE {
	issuer                   GeneralNames,
	serialNumber             CertificateSerialNumber
	}
*/

struct ESS_issuer_serial {
	STACK_OF!(GENERAL_NAME)	*issuer;
	ASN1_INTEGER* serial;
	}
alias ESS_issuer_serial ESS_ISSUER_SERIAL;

/*
ESSCertID ::=  SEQUENCE {
        certHash                 Hash,
        issuerSerial             IssuerSerial OPTIONAL
}
*/

struct ESS_cert_id {
	ASN1_OCTET_STRING* hash;	/* Always SHA-1 digest. */
	ESS_ISSUER_SERIAL* issuer_serial;
	}
alias ESS_cert_id ESS_CERT_ID;

/+mixin DECLARE_STACK_OF!(ESS_CERT_ID);+/
mixin DECLARE_ASN1_SET_OF!(ESS_CERT_ID);

/*
SigningCertificate ::=  SEQUENCE {
       certs        SEQUENCE OF ESSCertID,
       policies     SEQUENCE OF PolicyInformation OPTIONAL
}
*/

struct ESS_signing_cert {
	STACK_OF!(ESS_CERT_ID) *cert_ids;
	STACK_OF!(POLICYINFO) *policy_info;
	}
alias ESS_signing_cert ESS_SIGNING_CERT;


TS_REQ* TS_REQ_new();
void	TS_REQ_free(TS_REQ* a);
int	i2d_TS_REQ(const(TS_REQ)* a, ubyte** pp);
TS_REQ* d2i_TS_REQ(TS_REQ** a, const(ubyte)** pp, c_long length);

TS_REQ* TS_REQ_dup(TS_REQ* a);

TS_REQ* d2i_TS_REQ_fp(FILE* fp, TS_REQ** a);
int	i2d_TS_REQ_fp(FILE* fp, TS_REQ* a);
TS_REQ* d2i_TS_REQ_bio(BIO* fp, TS_REQ** a);
int	i2d_TS_REQ_bio(BIO* fp, TS_REQ* a);

TS_MSG_IMPRINT* TS_MSG_IMPRINT_new();
void		TS_MSG_IMPRINT_free(TS_MSG_IMPRINT* a);
int		i2d_TS_MSG_IMPRINT(const(TS_MSG_IMPRINT)* a, ubyte** pp);
TS_MSG_IMPRINT* d2i_TS_MSG_IMPRINT(TS_MSG_IMPRINT** a,
				    const(ubyte)** pp, c_long length);

TS_MSG_IMPRINT* TS_MSG_IMPRINT_dup(TS_MSG_IMPRINT* a);

TS_MSG_IMPRINT* d2i_TS_MSG_IMPRINT_fp(FILE* fp, TS_MSG_IMPRINT** a);
int		i2d_TS_MSG_IMPRINT_fp(FILE* fp, TS_MSG_IMPRINT* a);
TS_MSG_IMPRINT* d2i_TS_MSG_IMPRINT_bio(BIO* fp, TS_MSG_IMPRINT** a);
int		i2d_TS_MSG_IMPRINT_bio(BIO* fp, TS_MSG_IMPRINT* a);

TS_RESP* TS_RESP_new();
void	TS_RESP_free(TS_RESP* a);
int	i2d_TS_RESP(const(TS_RESP)* a, ubyte** pp);
TS_RESP* d2i_TS_RESP(TS_RESP** a, const(ubyte)** pp, c_long length);
TS_TST_INFO* PKCS7_to_TS_TST_INFO(PKCS7* token);
TS_RESP* TS_RESP_dup(TS_RESP* a);

TS_RESP* d2i_TS_RESP_fp(FILE* fp, TS_RESP** a);
int	i2d_TS_RESP_fp(FILE* fp, TS_RESP* a);
TS_RESP* d2i_TS_RESP_bio(BIO* fp, TS_RESP** a);
int	i2d_TS_RESP_bio(BIO* fp, TS_RESP* a);

TS_STATUS_INFO* TS_STATUS_INFO_new();
void		TS_STATUS_INFO_free(TS_STATUS_INFO* a);
int		i2d_TS_STATUS_INFO(const(TS_STATUS_INFO)* a, ubyte** pp);
TS_STATUS_INFO* d2i_TS_STATUS_INFO(TS_STATUS_INFO** a,
				    const(ubyte)** pp, c_long length);
TS_STATUS_INFO* TS_STATUS_INFO_dup(TS_STATUS_INFO* a);

TS_TST_INFO* TS_TST_INFO_new();
void		TS_TST_INFO_free(TS_TST_INFO* a);
int		i2d_TS_TST_INFO(const(TS_TST_INFO)* a, ubyte** pp);
TS_TST_INFO* d2i_TS_TST_INFO(TS_TST_INFO** a, const(ubyte)** pp,
				    c_long length);
TS_TST_INFO* TS_TST_INFO_dup(TS_TST_INFO* a);

TS_TST_INFO* d2i_TS_TST_INFO_fp(FILE* fp, TS_TST_INFO** a);
int		i2d_TS_TST_INFO_fp(FILE* fp, TS_TST_INFO* a);
TS_TST_INFO* d2i_TS_TST_INFO_bio(BIO* fp, TS_TST_INFO** a);
int		i2d_TS_TST_INFO_bio(BIO* fp, TS_TST_INFO* a);

TS_ACCURACY* TS_ACCURACY_new();
void		TS_ACCURACY_free(TS_ACCURACY* a);
int		i2d_TS_ACCURACY(const(TS_ACCURACY)* a, ubyte** pp);
TS_ACCURACY* d2i_TS_ACCURACY(TS_ACCURACY** a, const(ubyte)** pp,
				    c_long length);
TS_ACCURACY* TS_ACCURACY_dup(TS_ACCURACY* a);

ESS_ISSUER_SERIAL* ESS_ISSUER_SERIAL_new();
void		  ESS_ISSUER_SERIAL_free(ESS_ISSUER_SERIAL* a);
int		  i2d_ESS_ISSUER_SERIAL(const(ESS_ISSUER_SERIAL)* a,
					ubyte** pp);
ESS_ISSUER_SERIAL* d2i_ESS_ISSUER_SERIAL(ESS_ISSUER_SERIAL** a,
					 const(ubyte)** pp, c_long length);
ESS_ISSUER_SERIAL* ESS_ISSUER_SERIAL_dup(ESS_ISSUER_SERIAL* a);

ESS_CERT_ID* ESS_CERT_ID_new();
void		ESS_CERT_ID_free(ESS_CERT_ID* a);
int		i2d_ESS_CERT_ID(const(ESS_CERT_ID)* a, ubyte** pp);
ESS_CERT_ID* d2i_ESS_CERT_ID(ESS_CERT_ID** a, const(ubyte)** pp,
				 c_long length);
ESS_CERT_ID* ESS_CERT_ID_dup(ESS_CERT_ID* a);

ESS_SIGNING_CERT* ESS_SIGNING_CERT_new();
void		 ESS_SIGNING_CERT_free(ESS_SIGNING_CERT* a);
int		 i2d_ESS_SIGNING_CERT(const(ESS_SIGNING_CERT)* a,
				      ubyte** pp);
ESS_SIGNING_CERT* d2i_ESS_SIGNING_CERT(ESS_SIGNING_CERT** a,
				       const(ubyte)** pp, c_long length);
ESS_SIGNING_CERT* ESS_SIGNING_CERT_dup(ESS_SIGNING_CERT* a);

void ERR_load_TS_strings();

int TS_REQ_set_version(TS_REQ* a, c_long version_);
c_long TS_REQ_get_version(const(TS_REQ)* a);

int TS_REQ_set_msg_imprint(TS_REQ* a, TS_MSG_IMPRINT* msg_imprint);
TS_MSG_IMPRINT* TS_REQ_get_msg_imprint(TS_REQ* a);

int TS_MSG_IMPRINT_set_algo(TS_MSG_IMPRINT* a, X509_ALGOR* alg);
X509_ALGOR* TS_MSG_IMPRINT_get_algo(TS_MSG_IMPRINT* a);

int TS_MSG_IMPRINT_set_msg(TS_MSG_IMPRINT* a, ubyte* d, int len);
ASN1_OCTET_STRING* TS_MSG_IMPRINT_get_msg(TS_MSG_IMPRINT* a);

int TS_REQ_set_policy_id(TS_REQ* a, ASN1_OBJECT* policy);
ASN1_OBJECT* TS_REQ_get_policy_id(TS_REQ* a);

int TS_REQ_set_nonce(TS_REQ* a, const(ASN1_INTEGER)* nonce);
const(ASN1_INTEGER)* TS_REQ_get_nonce(const(TS_REQ)* a);

int TS_REQ_set_cert_req(TS_REQ* a, int cert_req);
int TS_REQ_get_cert_req(const(TS_REQ)* a);

STACK_OF!(X509_EXTENSION) *TS_REQ_get_exts(TS_REQ* a);
void TS_REQ_ext_free(TS_REQ* a);
int TS_REQ_get_ext_count(TS_REQ* a);
int TS_REQ_get_ext_by_NID(TS_REQ* a, int nid, int lastpos);
int TS_REQ_get_ext_by_OBJ(TS_REQ* a, ASN1_OBJECT* obj, int lastpos);
int TS_REQ_get_ext_by_critical(TS_REQ* a, int crit, int lastpos);
X509_EXTENSION* TS_REQ_get_ext(TS_REQ* a, int loc);
X509_EXTENSION* TS_REQ_delete_ext(TS_REQ* a, int loc);
int TS_REQ_add_ext(TS_REQ* a, X509_EXTENSION* ex, int loc);
void* TS_REQ_get_ext_d2i(TS_REQ* a, int nid, int* crit, int* idx);

/* Function declarations for TS_REQ defined in ts/ts_req_print.c */

int TS_REQ_print_bio(BIO* bio, TS_REQ* a);

/* Function declarations for TS_RESP defined in ts/ts_resp_utils.c */

int TS_RESP_set_status_info(TS_RESP* a, TS_STATUS_INFO* info);
TS_STATUS_INFO* TS_RESP_get_status_info(TS_RESP* a);

/* Caller loses ownership of PKCS7 and TS_TST_INFO objects. */
void TS_RESP_set_tst_info(TS_RESP* a, PKCS7* p7, TS_TST_INFO* tst_info);
PKCS7* TS_RESP_get_token(TS_RESP* a);
TS_TST_INFO* TS_RESP_get_tst_info(TS_RESP* a);

int TS_TST_INFO_set_version(TS_TST_INFO* a, c_long version_);
c_long TS_TST_INFO_get_version(const(TS_TST_INFO)* a);

int TS_TST_INFO_set_policy_id(TS_TST_INFO* a, ASN1_OBJECT* policy_id);
ASN1_OBJECT* TS_TST_INFO_get_policy_id(TS_TST_INFO* a);

int TS_TST_INFO_set_msg_imprint(TS_TST_INFO* a, TS_MSG_IMPRINT* msg_imprint);
TS_MSG_IMPRINT* TS_TST_INFO_get_msg_imprint(TS_TST_INFO* a);

int TS_TST_INFO_set_serial(TS_TST_INFO* a, const(ASN1_INTEGER)* serial);
const(ASN1_INTEGER)* TS_TST_INFO_get_serial(const(TS_TST_INFO)* a);

int TS_TST_INFO_set_time(TS_TST_INFO* a, const(ASN1_GENERALIZEDTIME)* gtime);
const(ASN1_GENERALIZEDTIME)* TS_TST_INFO_get_time(const(TS_TST_INFO)* a);

int TS_TST_INFO_set_accuracy(TS_TST_INFO* a, TS_ACCURACY* accuracy);
TS_ACCURACY* TS_TST_INFO_get_accuracy(TS_TST_INFO* a);

int TS_ACCURACY_set_seconds(TS_ACCURACY* a, const(ASN1_INTEGER)* seconds);
const(ASN1_INTEGER)* TS_ACCURACY_get_seconds(const(TS_ACCURACY)* a);

int TS_ACCURACY_set_millis(TS_ACCURACY* a, const(ASN1_INTEGER)* millis);
const(ASN1_INTEGER)* TS_ACCURACY_get_millis(const(TS_ACCURACY)* a);

int TS_ACCURACY_set_micros(TS_ACCURACY* a, const(ASN1_INTEGER)* micros);
const(ASN1_INTEGER)* TS_ACCURACY_get_micros(const(TS_ACCURACY)* a);

int TS_TST_INFO_set_ordering(TS_TST_INFO* a, int ordering);
int TS_TST_INFO_get_ordering(const(TS_TST_INFO)* a);

int TS_TST_INFO_set_nonce(TS_TST_INFO* a, const(ASN1_INTEGER)* nonce);
const(ASN1_INTEGER)* TS_TST_INFO_get_nonce(const(TS_TST_INFO)* a);

int TS_TST_INFO_set_tsa(TS_TST_INFO* a, GENERAL_NAME* tsa);
GENERAL_NAME* TS_TST_INFO_get_tsa(TS_TST_INFO* a);

STACK_OF!(X509_EXTENSION) *TS_TST_INFO_get_exts(TS_TST_INFO* a);
void TS_TST_INFO_ext_free(TS_TST_INFO* a);
int TS_TST_INFO_get_ext_count(TS_TST_INFO* a);
int TS_TST_INFO_get_ext_by_NID(TS_TST_INFO* a, int nid, int lastpos);
int TS_TST_INFO_get_ext_by_OBJ(TS_TST_INFO* a, ASN1_OBJECT* obj, int lastpos);
int TS_TST_INFO_get_ext_by_critical(TS_TST_INFO* a, int crit, int lastpos);
X509_EXTENSION* TS_TST_INFO_get_ext(TS_TST_INFO* a, int loc);
X509_EXTENSION* TS_TST_INFO_delete_ext(TS_TST_INFO* a, int loc);
int TS_TST_INFO_add_ext(TS_TST_INFO* a, X509_EXTENSION* ex, int loc);
void* TS_TST_INFO_get_ext_d2i(TS_TST_INFO* a, int nid, int* crit, int* idx);

/* Declarations related to response generation, defined in ts/ts_resp_sign.c. */

/* Optional flags for response generation. */

/* Don't include the TSA name in response. */
enum TS_TSA_NAME = 0x01;

/* Set ordering to true in response. */
enum TS_ORDERING = 0x02;

/*
 * Include the signer certificate and the other specified certificates in
 * the ESS signing certificate attribute beside the PKCS7 signed data.
 * Only the signer certificates is included by default.
 */
enum TS_ESS_CERT_ID_CHAIN = 0x04;

// /* Forward declaration. */
// struct TS_resp_ctx;

/* This must return a unique number less than 160 bits long. */
alias ExternC!(ASN1_INTEGER* function(TS_resp_ctx*, void*)) TS_serial_cb;

/* This must return the seconds and microseconds since Jan 1, 1970 in
   the sec and usec variables allocated by the caller.
   Return non-zero for success and zero for failure. */
alias ExternC!(int function(TS_resp_ctx*, void*, c_long* sec, c_long* usec)) TS_time_cb;

/* This must process the given extension.
 * It can modify the TS_TST_INFO object of the context.
 * Return values: !0 (processed), 0 (error, it must set the
 * status info/failure info of the response).
 */
alias ExternC!(int function(TS_resp_ctx*, X509_EXTENSION*, void*)) TS_extension_cb;

struct TS_resp_ctx {
	X509* signer_cert;
	EVP_PKEY* signer_key;
	STACK_OF!(X509)	*certs;	/* Certs to include in signed data. */
	STACK_OF!(ASN1_OBJECT)	*policies;	/* Acceptable policies. */
	ASN1_OBJECT* default_policy; /* It may appear in policies, too. */
	STACK_OF!(EVP_MD)	*mds;	/* Acceptable message digests. */
	ASN1_INTEGER* seconds;	/* accuracy, 0 means not specified. */
	ASN1_INTEGER* millis;	/* accuracy, 0 means not specified. */
	ASN1_INTEGER* micros;	/* accuracy, 0 means not specified. */
	uint clock_precision_digits; /* fraction of seconds in
						   time stamp token. */
	uint	flags;		/* Optional info, see values above. */

	/* Callback functions. */
	TS_serial_cb serial_cb;
	void* serial_cb_data;	/* User data for serial_cb. */

	TS_time_cb time_cb;
	void* time_cb_data;	/* User data for time_cb. */

	TS_extension_cb extension_cb;
	void* extension_cb_data;	/* User data for extension_cb. */

	/* These members are used only while creating the response. */
	TS_REQ* request;
	TS_RESP* response;
	TS_TST_INFO* tst_info;
	}
alias TS_resp_ctx TS_RESP_CTX;

/+mixin DECLARE_STACK_OF!(EVP_MD);+/
mixin DECLARE_ASN1_SET_OF!(EVP_MD);

/* Creates a response context that can be used for generating responses. */
TS_RESP_CTX* TS_RESP_CTX_new();
void TS_RESP_CTX_free(TS_RESP_CTX* ctx);

/* This parameter must be set. */
int TS_RESP_CTX_set_signer_cert(TS_RESP_CTX* ctx, X509* signer);

/* This parameter must be set. */
int TS_RESP_CTX_set_signer_key(TS_RESP_CTX* ctx, EVP_PKEY* key);

/* This parameter must be set. */
int TS_RESP_CTX_set_def_policy(TS_RESP_CTX* ctx, ASN1_OBJECT* def_policy);

/* No additional certs are included in the response by default. */
int TS_RESP_CTX_set_certs(TS_RESP_CTX* ctx, STACK_OF!(X509) *certs);

/* Adds a new acceptable policy, only the default policy
   is accepted by default. */
int TS_RESP_CTX_add_policy(TS_RESP_CTX* ctx, ASN1_OBJECT* policy);

/* Adds a new acceptable message digest. Note that no message digests
   are accepted by default. The md argument is shared with the caller. */
int TS_RESP_CTX_add_md(TS_RESP_CTX* ctx, const(EVP_MD)* md);

/* Accuracy is not included by default. */
int TS_RESP_CTX_set_accuracy(TS_RESP_CTX* ctx,
			     int secs, int millis, int micros);

/* Clock precision digits, i.e. the number of decimal digits:
   '0' means sec, '3' msec, '6' usec, and so on. Default is 0. */
int TS_RESP_CTX_set_clock_precision_digits(TS_RESP_CTX* ctx,
					   uint clock_precision_digits);
/* At most we accept usec precision. */
enum TS_MAX_CLOCK_PRECISION_DIGITS = 6;

/* No flags are set by default. */
void TS_RESP_CTX_add_flags(TS_RESP_CTX* ctx, int flags);

/* Default callback always returns a constant. */
void TS_RESP_CTX_set_serial_cb(TS_RESP_CTX* ctx, TS_serial_cb cb, void* data);

/* Default callback uses the gettimeofday() and gmtime() system calls. */
void TS_RESP_CTX_set_time_cb(TS_RESP_CTX* ctx, TS_time_cb cb, void* data);

/* Default callback rejects all extensions. The extension callback is called
 * when the TS_TST_INFO object is already set up and not signed yet. */
/* FIXME: extension handling is not tested yet. */
void TS_RESP_CTX_set_extension_cb(TS_RESP_CTX* ctx,
				  TS_extension_cb cb, void* data);

/* The following methods can be used in the callbacks. */
int TS_RESP_CTX_set_status_info(TS_RESP_CTX* ctx,
				int status, const(char)* text);

/* Sets the status info only if it is still TS_STATUS_GRANTED. */
int TS_RESP_CTX_set_status_info_cond(TS_RESP_CTX* ctx,
				     int status, const(char)* text);

int TS_RESP_CTX_add_failure_info(TS_RESP_CTX* ctx, int failure);

/* The get methods below can be used in the extension callback. */
TS_REQ* TS_RESP_CTX_get_request(TS_RESP_CTX* ctx);

TS_TST_INFO* TS_RESP_CTX_get_tst_info(TS_RESP_CTX* ctx);

/*
 * Creates the signed TS_TST_INFO and puts it in TS_RESP.
 * In case of errors it sets the status info properly.
 * Returns NULL only in case of memory allocation/fatal error.
 */
TS_RESP* TS_RESP_create_response(TS_RESP_CTX* ctx, BIO* req_bio);

/*
 * Declarations related to response verification,
 * they are defined in ts/ts_resp_verify.c.
 */

int TS_RESP_verify_signature(PKCS7* token, STACK_OF!(X509) *certs,
			     X509_STORE* store, X509** signer_out);

/* Context structure for the generic verify method. */

/* Verify the signer's certificate and the signature of the response. */
enum TS_VFY_SIGNATURE = (1u << 0);
/* Verify the version number of the response. */
enum TS_VFY_VERSION = (1u << 1);
/* Verify if the policy supplied by the user matches the policy of the TSA. */
enum TS_VFY_POLICY = (1u << 2);
/* Verify the message imprint provided by the user. This flag should not be
   specified with TS_VFY_DATA. */
enum TS_VFY_IMPRINT = (1u << 3);
/* Verify the message imprint computed by the verify method from the user
   provided data and the MD algorithm of the response. This flag should not be
   specified with TS_VFY_IMPRINT. */
enum TS_VFY_DATA = (1u << 4);
/* Verify the nonce value. */
enum TS_VFY_NONCE = (1u << 5);
/* Verify if the TSA name field matches the signer certificate. */
enum TS_VFY_SIGNER = (1u << 6);
/* Verify if the TSA name field equals to the user provided name. */
enum TS_VFY_TSA_NAME = (1u << 7);

/* You can use the following convenience constants. */
enum TS_VFY_ALL_IMPRINT	= (TS_VFY_SIGNATURE
				 | TS_VFY_VERSION
				 | TS_VFY_POLICY
				 | TS_VFY_IMPRINT
				 | TS_VFY_NONCE
				 | TS_VFY_SIGNER
				 | TS_VFY_TSA_NAME);
enum TS_VFY_ALL_DATA = (TS_VFY_SIGNATURE
				 | TS_VFY_VERSION
				 | TS_VFY_POLICY
				 | TS_VFY_DATA
				 | TS_VFY_NONCE
				 | TS_VFY_SIGNER
				 | TS_VFY_TSA_NAME);

struct TS_verify_ctx {
	/* Set this to the union of TS_VFY_... flags you want to carry out. */
	uint	flags;

	/* Must be set only with TS_VFY_SIGNATURE. certs is optional. */
	X509_STORE* store;
	STACK_OF!(X509)	*certs;

	/* Must be set only with TS_VFY_POLICY. */
	ASN1_OBJECT* policy;

	/* Must be set only with TS_VFY_IMPRINT. If md_alg is NULL,
	   the algorithm from the response is used. */
	X509_ALGOR* md_alg;
	ubyte* imprint;
	uint	imprint_len;

	/* Must be set only with TS_VFY_DATA. */
	BIO* data;

	/* Must be set only with TS_VFY_TSA_NAME. */
	ASN1_INTEGER* nonce;

	/* Must be set only with TS_VFY_TSA_NAME. */
	GENERAL_NAME* tsa_name;
	}
alias TS_verify_ctx TS_VERIFY_CTX;

int TS_RESP_verify_response(TS_VERIFY_CTX* ctx, TS_RESP* response);
int TS_RESP_verify_token(TS_VERIFY_CTX* ctx, PKCS7* token);

/*
 * Declarations related to response verification context,
 * they are defined in ts/ts_verify_ctx.c.
 */

/* Set all fields to zero. */
TS_VERIFY_CTX* TS_VERIFY_CTX_new();
void TS_VERIFY_CTX_init(TS_VERIFY_CTX* ctx);
void TS_VERIFY_CTX_free(TS_VERIFY_CTX* ctx);
void TS_VERIFY_CTX_cleanup(TS_VERIFY_CTX* ctx);

/*
 * If ctx is NULL, it allocates and returns a new object, otherwise
 * it returns ctx. It initialises all the members as follows:
 * flags = TS_VFY_ALL_IMPRINT & ~(TS_VFY_TSA_NAME | TS_VFY_SIGNATURE)
 * certs = NULL
 * store = NULL
 * policy = policy from the request or NULL if absent (in this case
 *	TS_VFY_POLICY is cleared from flags as well)
 * md_alg = MD algorithm from request
 * imprint, imprint_len = imprint from request
 * data = NULL
 * nonce, nonce_len = nonce from the request or NULL if absent (in this case
 * 	TS_VFY_NONCE is cleared from flags as well)
 * tsa_name = NULL
 * Important: after calling this method TS_VFY_SIGNATURE should be added!
 */
TS_VERIFY_CTX* TS_REQ_to_TS_VERIFY_CTX(TS_REQ* req, TS_VERIFY_CTX* ctx);

/* Function declarations for TS_RESP defined in ts/ts_resp_print.c */

int TS_RESP_print_bio(BIO* bio, TS_RESP* a);
int TS_STATUS_INFO_print_bio(BIO* bio, TS_STATUS_INFO* a);
int TS_TST_INFO_print_bio(BIO* bio, TS_TST_INFO* a);

/* Common utility functions defined in ts/ts_lib.c */

int TS_ASN1_INTEGER_print_bio(BIO* bio, const(ASN1_INTEGER)* num);
int TS_OBJ_print_bio(BIO* bio, const(ASN1_OBJECT)* obj);
int TS_ext_print_bio(BIO* bio, const STACK_OF!(X509_EXTENSION) *extensions);
int TS_X509_ALGOR_print_bio(BIO* bio, const(X509_ALGOR)* alg);
int TS_MSG_IMPRINT_print_bio(BIO* bio, TS_MSG_IMPRINT* msg);

/* Function declarations for handling configuration options,
   defined in ts/ts_conf.c */

X509* TS_CONF_load_cert(const(char)* file);
STACK_OF!(X509) *TS_CONF_load_certs(const(char)* file);
EVP_PKEY* TS_CONF_load_key(const(char)* file, const(char)* pass);
const(char)* TS_CONF_get_tsa_section(CONF* conf, const(char)* section);
int TS_CONF_set_serial(CONF* conf, const(char)* section, TS_serial_cb cb,
		       TS_RESP_CTX* ctx);
int TS_CONF_set_crypto_device(CONF* conf, const(char)* section,
			      const(char)* device);
int TS_CONF_set_default_engine(const(char)* name);
int TS_CONF_set_signer_cert(CONF* conf, const(char)* section,
			    const(char)* cert, TS_RESP_CTX* ctx);
int TS_CONF_set_certs(CONF* conf, const(char)* section, const(char)* certs,
		      TS_RESP_CTX* ctx);
int TS_CONF_set_signer_key(CONF* conf, const(char)* section,
			   const(char)* key, const(char)* pass, TS_RESP_CTX* ctx);
int TS_CONF_set_def_policy(CONF* conf, const(char)* section,
			   const(char)* policy, TS_RESP_CTX* ctx);
int TS_CONF_set_policies(CONF* conf, const(char)* section, TS_RESP_CTX* ctx);
int TS_CONF_set_digests(CONF* conf, const(char)* section, TS_RESP_CTX* ctx);
int TS_CONF_set_accuracy(CONF* conf, const(char)* section, TS_RESP_CTX* ctx);
int TS_CONF_set_clock_precision_digits(CONF* conf, const(char)* section,
				       TS_RESP_CTX* ctx);
int TS_CONF_set_ordering(CONF* conf, const(char)* section, TS_RESP_CTX* ctx);
int TS_CONF_set_tsa_name(CONF* conf, const(char)* section, TS_RESP_CTX* ctx);
int TS_CONF_set_ess_cert_id_chain(CONF* conf, const(char)* section,
				  TS_RESP_CTX* ctx);

/* -------------------------------------------------- */
/* BEGIN ERROR CODES */
/* The following lines are auto generated by the script mkerr.pl. Any changes
 * made after this point may be overwritten when the script is next run.
 */
void ERR_load_TS_strings();

/* Error codes for the TS functions. */

/* Function codes. */
enum TS_F_D2I_TS_RESP = 147;
enum TS_F_DEF_SERIAL_CB = 110;
enum TS_F_DEF_TIME_CB = 111;
enum TS_F_ESS_ADD_SIGNING_CERT = 112;
enum TS_F_ESS_CERT_ID_NEW_INIT = 113;
enum TS_F_ESS_SIGNING_CERT_NEW_INIT = 114;
enum TS_F_INT_TS_RESP_VERIFY_TOKEN = 149;
enum TS_F_PKCS7_TO_TS_TST_INFO = 148;
enum TS_F_TS_ACCURACY_SET_MICROS = 115;
enum TS_F_TS_ACCURACY_SET_MILLIS = 116;
enum TS_F_TS_ACCURACY_SET_SECONDS = 117;
enum TS_F_TS_CHECK_IMPRINTS = 100;
enum TS_F_TS_CHECK_NONCES = 101;
enum TS_F_TS_CHECK_POLICY = 102;
enum TS_F_TS_CHECK_SIGNING_CERTS = 103;
enum TS_F_TS_CHECK_STATUS_INFO = 104;
enum TS_F_TS_COMPUTE_IMPRINT = 145;
enum TS_F_TS_CONF_SET_DEFAULT_ENGINE = 146;
enum TS_F_TS_GET_STATUS_TEXT = 105;
enum TS_F_TS_MSG_IMPRINT_SET_ALGO = 118;
enum TS_F_TS_REQ_SET_MSG_IMPRINT = 119;
enum TS_F_TS_REQ_SET_NONCE = 120;
enum TS_F_TS_REQ_SET_POLICY_ID = 121;
enum TS_F_TS_RESP_CREATE_RESPONSE = 122;
enum TS_F_TS_RESP_CREATE_TST_INFO = 123;
enum TS_F_TS_RESP_CTX_ADD_FAILURE_INFO = 124;
enum TS_F_TS_RESP_CTX_ADD_MD = 125;
enum TS_F_TS_RESP_CTX_ADD_POLICY = 126;
enum TS_F_TS_RESP_CTX_NEW = 127;
enum TS_F_TS_RESP_CTX_SET_ACCURACY = 128;
enum TS_F_TS_RESP_CTX_SET_CERTS = 129;
enum TS_F_TS_RESP_CTX_SET_DEF_POLICY = 130;
enum TS_F_TS_RESP_CTX_SET_SIGNER_CERT = 131;
enum TS_F_TS_RESP_CTX_SET_STATUS_INFO = 132;
enum TS_F_TS_RESP_GET_POLICY = 133;
enum TS_F_TS_RESP_SET_GENTIME_WITH_PRECISION = 134;
enum TS_F_TS_RESP_SET_STATUS_INFO = 135;
enum TS_F_TS_RESP_SET_TST_INFO = 150;
enum TS_F_TS_RESP_SIGN = 136;
enum TS_F_TS_RESP_VERIFY_SIGNATURE = 106;
enum TS_F_TS_RESP_VERIFY_TOKEN = 107;
enum TS_F_TS_TST_INFO_SET_ACCURACY = 137;
enum TS_F_TS_TST_INFO_SET_MSG_IMPRINT = 138;
enum TS_F_TS_TST_INFO_SET_NONCE = 139;
enum TS_F_TS_TST_INFO_SET_POLICY_ID = 140;
enum TS_F_TS_TST_INFO_SET_SERIAL = 141;
enum TS_F_TS_TST_INFO_SET_TIME = 142;
enum TS_F_TS_TST_INFO_SET_TSA = 143;
enum TS_F_TS_VERIFY = 108;
enum TS_F_TS_VERIFY_CERT = 109;
enum TS_F_TS_VERIFY_CTX_NEW = 144;

/* Reason codes. */
enum TS_R_BAD_PKCS7_TYPE = 132;
enum TS_R_BAD_TYPE = 133;
enum TS_R_CERTIFICATE_VERIFY_ERROR = 100;
enum TS_R_COULD_NOT_SET_ENGINE = 127;
enum TS_R_COULD_NOT_SET_TIME = 115;
enum TS_R_D2I_TS_RESP_INT_FAILED = 128;
enum TS_R_DETACHED_CONTENT = 134;
enum TS_R_ESS_ADD_SIGNING_CERT_ERROR = 116;
enum TS_R_ESS_SIGNING_CERTIFICATE_ERROR = 101;
enum TS_R_INVALID_NULL_POINTER = 102;
enum TS_R_INVALID_SIGNER_CERTIFICATE_PURPOSE = 117;
enum TS_R_MESSAGE_IMPRINT_MISMATCH = 103;
enum TS_R_NONCE_MISMATCH = 104;
enum TS_R_NONCE_NOT_RETURNED = 105;
enum TS_R_NO_CONTENT = 106;
enum TS_R_NO_TIME_STAMP_TOKEN = 107;
enum TS_R_PKCS7_ADD_SIGNATURE_ERROR = 118;
enum TS_R_PKCS7_ADD_SIGNED_ATTR_ERROR = 119;
enum TS_R_PKCS7_TO_TS_TST_INFO_FAILED = 129;
enum TS_R_POLICY_MISMATCH = 108;
enum TS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE = 120;
enum TS_R_RESPONSE_SETUP_ERROR = 121;
enum TS_R_SIGNATURE_FAILURE = 109;
enum TS_R_THERE_MUST_BE_ONE_SIGNER = 110;
enum TS_R_TIME_SYSCALL_ERROR = 122;
enum TS_R_TOKEN_NOT_PRESENT = 130;
enum TS_R_TOKEN_PRESENT = 131;
enum TS_R_TSA_NAME_MISMATCH = 111;
enum TS_R_TSA_UNTRUSTED = 112;
enum TS_R_TST_INFO_SETUP_ERROR = 123;
enum TS_R_TS_DATASIGN = 124;
enum TS_R_UNACCEPTABLE_POLICY = 125;
enum TS_R_UNSUPPORTED_MD_ALGORITHM = 126;
enum TS_R_UNSUPPORTED_VERSION = 113;
enum TS_R_WRONG_CONTENT_TYPE = 114;
