diff -r 3ca3acefc66a -r 1ce14068ef31 application/pwd.c
--- a/application/pwd.c	Mon Oct 21 15:45:12 2024 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,463 +0,0 @@
-/*
- * 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.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "pwd.h"
-
-#include <cx/utils.h>
-#include <cx/hash_map.h>
-
-#ifdef _WIN32
-#include <winsock.h>
-#pragma comment(lib, "Ws2_32.lib")
-#else
-#include <netinet/in.h>
-#endif
-
-PwdStore* pwdstore_open(const char *file) {
-    FILE *in = fopen(file, "r");
-    if(!in) {
-        return NULL;
-    }
-    
-    CxBuffer *buf = cxBufferCreate(NULL, 2048, cxDefaultAllocator, CX_BUFFER_FREE_CONTENTS|CX_BUFFER_AUTO_EXTEND);
-    cx_stream_copy(in, buf, (cx_read_func)fread, (cx_write_func)cxBufferWrite);
-    fclose(in);
-    
-    if(buf->size < PWDS_HEADER_SIZE || buf->space[0] != PWDS_MAGIC_CHAR) {
-        cxBufferFree(buf);
-        return NULL;
-    }
-    
-    PwdStore *p = malloc(sizeof(PwdStore));
-    p->ids = cxHashMapCreate(cxDefaultAllocator, CX_STORE_POINTERS, 16);
-    p->locations = cxLinkedListCreateSimple(CX_STORE_POINTERS);
-    p->noloc = cxLinkedListCreateSimple(CX_STORE_POINTERS);
-    p->index = cxHashMapCreate(cxDefaultAllocator, CX_STORE_POINTERS, 16);
-    p->content = buf;
-    p->key = NULL;
-    p->unlock_cmd = NULL;
-    p->lock_cmd = NULL;
-    p->encoffset = PWDS_HEADER_SIZE;
-    p->isdecrypted = 0;
-    
-    if(pwdstore_getindex(p)) {
-        pwdstore_free(p);
-        return NULL;
-    }
-    
-    return p;
-}
-
-PwdStore* pwdstore_new(void) {
-    PwdStore *p = calloc(1, sizeof(PwdStore));
-    p->ids = cxHashMapCreate(cxDefaultAllocator, CX_STORE_POINTERS, 16);
-    p->locations = cxLinkedListCreateSimple(CX_STORE_POINTERS);
-    p->noloc = cxLinkedListCreateSimple(CX_STORE_POINTERS);
-    p->index = cxHashMapCreate(cxDefaultAllocator, CX_STORE_POINTERS, 16);
-    p->content = cxBufferCreate(NULL, PWDS_HEADER_SIZE, cxDefaultAllocator, CX_BUFFER_FREE_CONTENTS|CX_BUFFER_AUTO_EXTEND);
-    PWDS_MAGIC(p) = PWDS_MAGIC_CHAR;
-    PWDS_VERSION(p) = 1;
-    PWDS_ENC(p) = DAV_KEY_AES256;
-    PWDS_PWFUNC(p) = DAV_PWFUNC_PBKDF2_SHA256;
-    dav_rand_bytes((unsigned char*)p->content->space+4, 16);
-    p->isdecrypted = 1;
-    p->encoffset = PWDS_HEADER_SIZE;
-    return p;
-}
-
-static int readval(CxBuffer *in, char **val, int allowzero) {
-    // value  = length string
-    // length = uint32
-    // string = bytes
-    
-    *val = NULL;
-    
-    // get length
-    uint32_t length = 0;
-    if(cxBufferRead(&length, 1, sizeof(uint32_t), in) != sizeof(uint32_t)) {
-        return 0;
-    }
-    length = ntohl(length); // convert from BE to host byte order
-    if(length == 0) {
-        if(allowzero) {
-            return 1;
-        } else {
-            return 0;
-        }
-    }
-    if(length > PWDSTORE_MAX_LEN) {
-        return 0;
-    }
-    
-    // get value
-    char *value = malloc(length + 1);
-    value[length] = 0;
-    if(cxBufferRead(value, 1, length, in) != length) {
-        free(value);
-        return 0;
-    }
-    
-    *val = value;
-    return 1;
-}
-
-static int read_indexentry(PwdStore *p, CxBuffer *in) {
-    // read type of index element
-    int type = cxBufferGet(in);
-    if(type == EOF || type != 0) {
-        // only type 0 supported yet
-        return 0;
-    }
-      
-    char *id = NULL;
-    CxList *locations = cxLinkedListCreateSimple(CX_STORE_POINTERS);
-    cxDefineDestructor(locations, free);
-    
-    // get id (required)
-    int ret = 0;
-    if(readval(in, &id, FALSE)) {
-        // get locations
-        char *location = NULL;
-        while((ret = readval(in, &location, TRUE)) == 1) {
-            if(!location) {
-                break;
-            }
-            cxListAdd(locations, location);
-        }
-    }
-    
-    if(ret) {
-        pwdstore_put_index(p, id, locations);
-    } else {
-        if(id) free(id);
-        cxListDestroy(locations);
-    }
-    
-    return ret;
-}
-
-static int read_pwdentry(PwdStore *p, CxBuffer *in) {
-    int type = cxBufferGet(in);
-    if(type == EOF || type != 0) {
-        // only type 0 supported yet
-        return 0;
-    }
-    
-    char *id = NULL;
-    char *user = NULL;
-    char *password = NULL;
-    
-    int ret = 0;
-    if(readval(in, &id, FALSE)) {
-        if(readval(in, &user, FALSE)) {
-            if(readval(in, &password, FALSE)) {
-                pwdstore_put(p, id, user, password);
-                ret = 1;
-            }
-        }
-    }
-    
-    if(id) free(id);
-    if(user) free(user);
-    if(password) free(password);
-    
-    return ret;
-}
-
-static void remove_list_entries(PwdStore *s, const char *id) {
-    CxIterator i = cxListMutIterator(s->locations);
-    cx_foreach(PwdIndexEntry*, ie, i) {
-        if(!strcmp(ie->id, id)) {
-            cxIteratorFlagRemoval(i);
-            cxIteratorNext(i);
-            break;
-        }
-    }
-    i = cxListMutIterator(s->noloc);
-    cx_foreach(PwdIndexEntry*, ie, i) {
-        if(!strcmp(ie->id, id)) {
-            cxIteratorFlagRemoval(i);
-            cxIteratorNext(i);
-            break;
-        }
-    }
-}
-
-void pwdstore_remove_entry(PwdStore *s, const char *id) {
-    remove_list_entries(s, id);
-    
-    CxHashKey key = cx_hash_key_str(id);
-    PwdIndexEntry *i = cxMapRemoveAndGet(s->index, key);
-    PwdEntry *e = cxMapRemoveAndGet(s->ids, key);
-    
-    if(i) {
-        cxListDestroy(i->locations);
-        free(i->id);
-        free(i);
-    }
-    if(e) {
-        free(e->id);
-        free(e->user);
-        free(e->password);
-        free(e);
-    }
-}
-
-int pwdstore_getindex(PwdStore *s) {
-    uint32_t netindexlen;
-    
-    // set the position to the last 4 bytes of the header
-    // for reading index length
-    s->content->pos = PWDS_HEADER_SIZE - sizeof(uint32_t);
-    
-    // read indexlen and convert to host byte order
-    if(cxBufferRead(&netindexlen, 1, sizeof(uint32_t), s->content) != sizeof(uint32_t)) {
-        return 1;
-    }
-    uint32_t indexlen = ntohl(netindexlen);
-    
-    // integer overflow check
-    if(UINT32_MAX - PWDS_HEADER_SIZE < indexlen) {
-        return 1;
-    }
-    if(s->content->size < PWDS_HEADER_SIZE + indexlen) {
-        return 1;
-    }
-    // encrypted content starts after the index content
-    s->encoffset = PWDS_HEADER_SIZE + indexlen;
-    
-    // the index starts after the header
-    CxBuffer *index = cxBufferCreate(s->content->space+PWDS_HEADER_SIZE, indexlen, cxDefaultAllocator, 0);
-    index->size = indexlen;
-    
-    // read index
-    while(read_indexentry(s, index)) {}
-    
-    // free index buffer structure (not the content)
-    cxBufferFree(index);
-    
-    return 0;
-}
-
-int pwdstore_decrypt(PwdStore *p) {
-    if(!p->key) {
-        return 1;
-    }
-    if(p->isdecrypted) {
-        return 0;
-    }
-    
-    // decrypt contet
-    size_t encsz = p->content->size - p->encoffset;
-    CxBuffer *enc = cxBufferCreate(p->content->space + p->encoffset, encsz, cxDefaultAllocator, 0);
-    enc->size = encsz;
-    enc->size = p->content->size - p->encoffset;
-    CxBuffer *content = aes_decrypt_buffer(enc, p->key);
-    cxBufferFree(enc);
-    if(!content) {
-        return 1;
-    }
-    
-    while(read_pwdentry(p, content)) {}
-    
-    cxBufferFree(content);
-    
-    return 0;
-}
-
-int pwdstore_setpassword(PwdStore *p, const char *password) {
-    DavKey *key = dav_pw2key(
-            password,
-            (unsigned char*)(p->content->space + 4),
-            16,
-            PWDS_PWFUNC(p),
-            PWDS_ENC(p));
-    if(!key) {
-        return 1;
-    }
-    
-    p->key = key;
-    return 0;
-}
-
-void pwdstore_encsettings(PwdStore *p, uint8_t enc, uint8_t pwfunc) {
-    PWDS_ENC(p) = enc;
-    PWDS_PWFUNC(p) = pwfunc;
-}
-
-void pwdstore_free_entry(PwdEntry *e) {
-    if(e->id) free(e->id);
-    if(e->user) free(e->user);
-    if(e->password) free(e->password);
-    free(e);
-}
-
-void pwdstore_free(PwdStore* p) {
-    cxDefineDestructor(p->ids, pwdstore_free_entry);
-    cxMapDestroy(p->ids);
-    
-    cxListDestroy(p->locations);
-    
-    if(p->content) {
-        cxBufferFree(p->content);
-    }
-    
-    free(p);
-}
-
-int pwdstore_has_id(PwdStore *s, const char *id) {
-    return cxMapGet(s->index, cx_hash_key_str(id)) ? 1 : 0;
-}
-
-PwdEntry* pwdstore_get(PwdStore *p, const char *id) {
-    PwdEntry *e = cxMapGet(p->ids, cx_hash_key_str(id));
-    if(e && e->user && e->password) {
-        return e;
-    } else {
-        return NULL;
-    }
-}
-
-void pwdstore_put(PwdStore *p, const char *id, const char *username, const char *password) {
-    PwdEntry *entry = malloc(sizeof(PwdEntry));
-    entry->id = strdup(id);
-    entry->user = strdup(username);
-    entry->password = strdup(password);
-    cxMapPut(p->ids, cx_hash_key_str(id), entry);
-}
-
-void pwdstore_put_index(PwdStore *p, char *id, CxList *locations) {
-    PwdIndexEntry *e = cxMapGet(p->index, cx_hash_key_str(id));
-    if(e) {
-        return;
-    }
-    PwdIndexEntry *newentry = malloc(sizeof(PwdIndexEntry));
-    newentry->id = id;
-    if(locations) {
-        newentry->locations = locations;
-        cxListAdd(p->locations, newentry);
-    } else {
-        newentry->locations = NULL;
-        cxListAdd(p->noloc, newentry);
-    }
-    cxMapPut(p->index, cx_hash_key_str(id), newentry);
-}
-
-void write_index_entry(CxBuffer *out, PwdIndexEntry *e) {
-    uint32_t idlen = strlen(e->id);
-    uint32_t netidlen = htonl(idlen);
-    
-    cxBufferPut(out, 0); // type
-
-    cxBufferWrite(&netidlen, 1, sizeof(uint32_t), out);
-    cxBufferWrite(e->id, 1, idlen, out);
-    
-    CxIterator i = cxListIterator(e->locations);
-    cx_foreach(char *, location, i) {
-        uint32_t locationlen = strlen(location);
-        uint32_t netlocationlen = htonl(locationlen);
-        
-        cxBufferWrite(&netlocationlen, 1, sizeof(uint32_t), out);
-        cxBufferWrite(location, 1, locationlen, out);
-    }
-    
-    uint32_t terminate = 0;
-    cxBufferWrite(&terminate, 1, sizeof(uint32_t), out);
-}
-
-int pwdstore_store(PwdStore *p, const char *file) {
-    if(!p->key) {
-        return 1;
-    }
-    
-    CxBuffer *index = cxBufferCreate(NULL, 2048, cxDefaultAllocator, CX_BUFFER_FREE_CONTENTS|CX_BUFFER_AUTO_EXTEND);
-    CxBuffer *content = cxBufferCreate(NULL, 2048, cxDefaultAllocator, CX_BUFFER_FREE_CONTENTS|CX_BUFFER_AUTO_EXTEND);
-    
-    // create index
-    CxIterator i = cxListIterator(p->noloc);
-    cx_foreach(PwdIndexEntry*, e, i) {
-        write_index_entry(index, e);
-    }
-    i = cxListIterator(p->locations);
-    cx_foreach(PwdIndexEntry*, e, i) {
-        write_index_entry(index, e);
-    }
-    
-    i = cxMapIteratorValues(p->ids);
-    cx_foreach(PwdEntry*, value, i) {
-        if(!value->id || !value->user || !value->password) {
-            continue;
-        }
-        
-        uint32_t idlen = strlen(value->id);
-        uint32_t ulen = strlen(value->user);
-        uint32_t plen = strlen(value->password);
-        uint32_t netidlen = htonl(idlen);
-        uint32_t netulen = htonl(ulen);
-        uint32_t netplen = htonl(plen);
-        
-        // content buffer
-        cxBufferPut(content, 0); // type
-        
-        cxBufferWrite(&netidlen, 1, sizeof(uint32_t), content);
-        cxBufferWrite(value->id, 1, idlen, content);
-        cxBufferWrite(&netulen, 1, sizeof(uint32_t), content);
-        cxBufferWrite(value->user, 1, ulen, content);
-        cxBufferWrite(&netplen, 1, sizeof(uint32_t), content);
-        cxBufferWrite(value->password, 1, plen, content);
-    }
-      
-    content->pos = 0;
-    CxBuffer *enc = aes_encrypt_buffer(content, p->key);
-
-    p->content->pos = PWDS_HEADER_SIZE - sizeof(uint32_t);
-    p->content->size = PWDS_HEADER_SIZE;
-    
-    // add index after header
-    uint32_t netindexlen = htonl((uint32_t)index->size);
-    cxBufferWrite(&netindexlen, 1, sizeof(uint32_t), p->content);
-    cxBufferWrite(index->space, 1, index->size, p->content);
-    
-    // add encrypted buffer
-    cxBufferWrite(enc->space, 1, enc->size, p->content);
-    
-    cxBufferFree(enc);
-    
-    FILE *out = fopen(file, "w");
-    if(!out) {
-        return 1;
-    }
-    fwrite(p->content->space, 1, p->content->size, out);
-    fclose(out);
-    
-    return 0;
-}