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1 nishi 1 
/* $Id: cookie.c 7 2024-08-21 01:12:44Z nishi $ */
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#include "rv_auth.h"
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#include "rv_util.h"
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#include "rv_db.h"
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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extern char** environ;
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struct cookie_entry {
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	char* key;
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	char* value;
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};
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struct cookie_entry** cookie_entries;
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void parse_cookie(void) {
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	cookie_entries = malloc(sizeof(*cookie_entries));
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	cookie_entries[0] = NULL;
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	char* cookie = getenv("HTTP_COOKIE");
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	if(cookie != NULL) {
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		cookie = rv_strdup(cookie);
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		int i;
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		int incr = 0;
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		for(i = 0;; i++) {
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			if(cookie[i] == 0 || cookie[i] == ';') {
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				char oldc = cookie[i];
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				cookie[i] = 0;
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				char* key = cookie + incr;
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				char* value = "";
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				int j;
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				for(j = 0; key[j] != 0; j++) {
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					if(key[j] == '=') {
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						key[j] = 0;
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						value = key + j + 1;
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						break;
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					}
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				}
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				struct cookie_entry* entry = malloc(sizeof(*entry));
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				entry->key = rv_strdup(key);
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				entry->value = rv_strdup(value);
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				struct cookie_entry** old_entries = cookie_entries;
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				for(j = 0; old_entries[j] != NULL; j++)
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					;
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				cookie_entries = malloc(sizeof(*cookie_entries) * (j + 2));
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				for(j = 0; old_entries[j] != NULL; j++) {
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					cookie_entries[j] = old_entries[j];
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				}
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				cookie_entries[j] = entry;
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				cookie_entries[j + 1] = NULL;
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				int oldi = i;
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				i++;
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				for(; cookie[i] != 0 && (cookie[i] == ' ' || cookie[i] == '\t'); i++)
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					;
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				i--;
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				incr = i + 1;
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				if(oldc == 0) break;
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			}
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		}
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		free(cookie);
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	}
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}
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char* rv_logged_in(void) {
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	int i;
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	for(i = 0; cookie_entries[i] != NULL; i++) {
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		if(strcmp(cookie_entries[i]->key, "token") == 0) {
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			char* who = rv_who_has_token(cookie_entries[i]->value);
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			if(who == NULL) {
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				printf("Set-Cookie: token=; HttpOnly; Expires=0; SameSite=Strict\r\n");
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			}
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			return who;
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			break;
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		}
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	}
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	return NULL;
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}
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7 nishi 87 
void rv_logout(void) {
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	int i;
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	for(i = 0; cookie_entries[i] != NULL; i++) {
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		if(strcmp(cookie_entries[i]->key, "token") == 0) {
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			printf("Set-Cookie: token=; HttpOnly; Expires=0; SameSite=Strict\r\n");
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			rv_remove_token(cookie_entries[i]->value);
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			break;
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		}
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	}
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}
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5 nishi 98 
void rv_save_login(const char* username) {
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	char* token = rv_new_token(username);
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	printf("Set-Cookie: token=%s; HttpOnly; SameSite=Strict\r\n", token);
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	free(token);
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}
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void rv_init_auth(void) { parse_cookie(); }
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3 nishi 106 
void rv_free_auth(void) {
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	int i;
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	for(i = 0; cookie_entries[i] != NULL; i++) {
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		free(cookie_entries[i]->key);
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		free(cookie_entries[i]->value);
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		free(cookie_entries[i]);
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	}
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	free(cookie_entries);
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}