X-Git-Url: http://git.bytex64.net/?a=blobdiff_plain;f=common%2Fauth.c;h=01164626e9599a9e29cd9917c580028040f41b0b;hb=a65aeec9e6152703de9c770e56e689b1356cddb0;hp=0a3a8f5c664c07f0d1175f66679c5ad6c3a6e332;hpb=65e6e5bf86b8474d7178beb870901e2a8e9e0d17;p=blerg.git

diff --git a/common/auth.c b/common/auth.c
index 0a3a8f5..0116462 100644
--- a/common/auth.c
+++ b/common/auth.c
@@ -3,9 +3,12 @@
 #include <fcntl.h>
 #include <string.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include "config.h"
 #include "auth.h"
 
+#define TOKEN_SIZE 16
+
 int auth_set_password(const char *username, const char *password) {
 	char filename[512];
 	int fd;
@@ -49,3 +52,83 @@ int auth_check_password(const char *username, const char *password) {
 	else
 		return 0;
 }
+
+void hexify(char *dst, char *src, int len) {
+	static char hex[] = "0123456789abcdef";
+	int i;
+
+	for (i = 0; i < len; i++) {
+		dst[i * 2]     = hex[(src[i] & 0xF0) >> 4];
+		dst[i * 2 + 1] = hex[src[i] & 0xF];
+	}
+}
+
+char *create_random_token() {
+	unsigned char buf[TOKEN_SIZE];
+	char *token;
+	int rand_fd;
+
+	rand_fd = open("/dev/urandom", O_RDONLY);
+	if (rand_fd == -1) {
+		perror("Could not open /dev/urandom\n");
+		return 0;
+	}
+	read(rand_fd, buf, TOKEN_SIZE);
+	close(rand_fd);
+
+	token = malloc(TOKEN_SIZE * 2 + 1);
+	hexify(token, buf, TOKEN_SIZE);
+	token[TOKEN_SIZE * 2] = 0;
+
+	return token;
+}
+
+int auth_login(const char *username, const char *password) {
+	char filename[512];
+	int token_fd;
+
+	if (!auth_check_password(username, password))
+		return 0;
+
+	sprintf(filename, "%s/%s/token", DATA_PATH, username);
+	token_fd = open(filename, O_WRONLY | O_CREAT, 0600);
+	if (token_fd == -1) {
+		perror("Could not open token");
+		return 0;
+	}
+
+	char *token = create_random_token();
+	write(token_fd, token, TOKEN_SIZE * 2);
+	close(token_fd);
+	free(token);
+
+	return 1;
+}
+
+int auth_logout(const char *username) {
+	char filename[512];
+	sprintf(filename, "%s/%s/token", DATA_PATH, username);
+	if (unlink(filename) == -1)
+		return 0;
+
+	return 1;
+}
+
+char *auth_get_token(const char *username) {
+	char filename[512];
+	char *token;
+	int token_fd;
+
+	sprintf(filename, "%s/%s/token", DATA_PATH, username);
+	token_fd = open(filename, O_RDONLY, 0600);
+	if (token_fd == -1) {
+		perror("Could not open token");
+		return NULL;
+	}
+
+	token = malloc(TOKEN_SIZE * 2 + 1);
+	read(token_fd, token, TOKEN_SIZE * 2);
+	close(token_fd);
+
+	return token;
+}