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/*
* Copyright (c) 2017, [Ribose Inc](https://www.ribose.com).
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS 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 COPYRIGHT OWNER OR 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.
*/
#ifndef STREAM_PARSE_H_
#define STREAM_PARSE_H_
#include <stdint.h>
#include <stdbool.h>
#include <sys/types.h>
#include "rnp.h"
#include "stream-common.h"
#include "stream-ctx.h"
#include "stream-packet.h"
typedef struct pgp_parse_handler_t pgp_parse_handler_t;
typedef struct pgp_signature_info_t pgp_signature_info_t;
typedef bool pgp_destination_func_t(pgp_parse_handler_t *handler,
pgp_dest_t ** dst,
bool * closedst,
const char * filename,
uint32_t mtime);
typedef bool pgp_source_func_t(pgp_parse_handler_t *handler, pgp_source_t *src);
typedef void pgp_signatures_func_t(const std::vector<pgp_signature_info_t> &sigs, void *param);
typedef void pgp_on_recipients_func_t(const std::vector<pgp_pk_sesskey_t> &recipients,
const std::vector<pgp_sk_sesskey_t> &passwords,
void * param);
typedef void pgp_decryption_start_func_t(pgp_pk_sesskey_t *pubenc,
pgp_sk_sesskey_t *symenc,
void * param);
typedef void pgp_decryption_info_func_t(bool mdc,
pgp_aead_alg_t aead,
pgp_symm_alg_t salg,
void * param);
typedef void pgp_decryption_done_func_t(bool validated, void *param);
/* handler used to return needed information during pgp source processing */
typedef struct pgp_parse_handler_t {
pgp_password_provider_t *password_provider; /* if NULL then default will be used */
pgp_key_provider_t * key_provider; /* must be set when key is required, i.e. during
signing/verification/public key encryption and
deryption */
pgp_destination_func_t *dest_provider; /* called when destination stream is required */
pgp_source_func_t * src_provider; /* required to provider source during the detached
signature verification */
pgp_on_recipients_func_t * on_recipients; /* called before decryption start */
pgp_decryption_start_func_t *on_decryption_start; /* called when decryption key obtained */
pgp_decryption_info_func_t * on_decryption_info; /* called when decryption is started */
pgp_decryption_done_func_t * on_decryption_done; /* called when decryption is finished */
pgp_signatures_func_t * on_signatures; /* for signature verification results */
rnp_ctx_t *ctx; /* operation context */
void * param; /* additional parameters */
} pgp_parse_handler_t;
/* @brief Process the OpenPGP source: file, memory, stdin
* Function will parse input data, provided by any source conforming to pgp_source_t,
* autodetecting whether it is armored, cleartext or binary.
* @param handler handler to respond on stream reader callbacks
* @param src initialized source with cache
* @return RNP_SUCCESS on success or error code otherwise
**/
rnp_result_t process_pgp_source(pgp_parse_handler_t *handler, pgp_source_t &src);
/* @brief Init source with OpenPGP compressed data packet
* @param src allocated pgp_source_t structure
* @param readsrc source to read compressed data from
* @return RNP_SUCCESS on success or error code otherwise
*/
rnp_result_t init_compressed_src(pgp_source_t *src, pgp_source_t *readsrc);
/* @brief Get compression algorithm used in compressed source
* @param src compressed source, initialized with init_compressed_src
* @param alg algorithm will be written here. Cannot be NULL.
* @return true if operation succeeded and alg is populate or false otherwise
*/
bool get_compressed_src_alg(pgp_source_t *src, uint8_t *alg);
/* @brief Init source with OpenPGP literal data packet
* @param src allocated pgp_source_t structure
* @param readsrc source to read literal data from
* @return RNP_SUCCESS on success or error code otherwise
*/
rnp_result_t init_literal_src(pgp_source_t *src, pgp_source_t *readsrc);
/* @brief Get the literal data packet information fields (not the OpenPGP packet header)
* @param src literal data source, initialized with init_literal_src
* @param hdr pointer to header structure, where result will be stored
* @return true on success or false otherwise
*/
bool get_literal_src_hdr(pgp_source_t *src, pgp_literal_hdr_t *hdr);
/* @brief Get the AEAD-encrypted packet information fields (not the OpenPGP packet header)
* @param src AEAD-encrypted data source (starting from packet data itself, not the header)
* @param hdr pointer to header structure, where result will be stored
* @return true on success or false otherwise
*/
bool get_aead_src_hdr(pgp_source_t *src, pgp_aead_hdr_t *hdr);
#endif
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