libidav/resource.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2018 Olaf Wintermann. 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 HOLDER 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 RESOURCE_H
#define	RESOURCE_H

#include "webdav.h"
#include "crypto.h"
#include <ucx/string.h>

#ifdef	__cplusplus
extern "C" {
#endif

typedef struct DavResourceData   DavResourceData;

struct DavResourceData {
    UcxMap  *properties;
    UcxList *set;
    UcxList *remove;
    UcxList *crypto_set;
    UcxList *crypto_remove;
    
    /*
     * properties encapsulated in a crypto-prop property or NULL
     */
    UcxMap *crypto_properties;
    
    /*
     * char* or stream
     */
    void      *content;
    /*
     * if NULL, content is a char*
     */
    read_func read;
    /*
     * curl seek func
     */
    dav_seek_func seek;
    /*
     * content length
     */
    size_t    length;
    
    /*
     * sha256 content hash
     */
    char hash[32];
};

/*
 * read wrapper with integrated hashing
 */
typedef struct {
    DAV_SHA_CTX *sha;
    void *stream;
    dav_read_func read;
    dav_seek_func seek;
    int error;
} HashStream;

struct DavInputStream {
    DavResource *res;
    CURLM *m;
    CURL *c;
    AESDecrypter *dec;
    char *buffer;
    size_t alloc;
    size_t size;
    size_t pos;
    int eof;
};

struct DavOutputStream {
    DavResource *res;
    CURLM *m;
    CURL *c;
    AESEncrypter *enc;
    HashStream *hstr;
    const char *buffer;
    size_t size;
    size_t pos;
    int eof;
};

DavResource* dav_resource_new_full(DavSession *sn, char *parent_path, char *name, char *href);

void resource_free_properties(DavSession *sn, UcxMap *properties);

void resource_set_href(DavResource *res, sstr_t href);

void resource_set_info(DavResource *res, char *href_str);
DavResourceData* resource_data_new(DavSession *sn);
void resource_add_property(DavResource *res, const char *ns, const char *name, xmlNode *val);
void resource_set_crypto_properties(DavResource *res, UcxMap *cprops);
DavXmlNode* resource_get_property(DavResource *res, const char *ns, const char *name);
DavXmlNode* resource_get_encrypted_property(DavResource *res, const char *ns, const char *name);
DavXmlNode* resource_get_property_k(DavResource *res, UcxKey key);
DavXmlNode* resource_get_encrypted_property_k(DavResource *res, UcxKey key);
void resource_add_child(DavResource *parent, DavResource *child);
void resource_add_ordered_child(DavResource *parent, DavResource *child, UcxList *ordercr);
int resource_add_crypto_info(DavSession *sn, const char *href, const char *name, const char *hash);

sstr_t dav_property_key_a(UcxAllocator *a, const char *ns, const char *name);

DavXmlNode* create_crypto_prop(DavSession *sn, UcxMap *properties);
UcxMap* parse_crypto_prop(DavSession *sn, DavKey *key, DavXmlNode *node);
UcxMap* parse_crypto_prop_str(DavSession *sn, DavKey *key, const char *content);

#ifdef	__cplusplus
}
#endif

#endif	/* RESOURCE_H */