add config parser

CMakeLists.txt

@@ -8,5 +8,5 @@ IF(APPLE)
   LINK_DIRECTORIES(/opt/local/lib)
 ENDIF()
 
-ADD_EXECUTABLE(uhttpd main.c listen.c client.c utils.c file.c)
+ADD_EXECUTABLE(uhttpd main.c listen.c client.c utils.c file.c auth.c)
 TARGET_LINK_LIBRARIES(uhttpd ubox ubus)

auth.c

@@ -0,0 +1,63 @@
+/*
+ * uhttpd - Tiny single-threaded httpd
+ *
+ *   Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
+ *   Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include "uhttpd.h"
+
+static LIST_HEAD(auth_realms);
+
+void uh_auth_add(const char *path, const char *user, const char *pass)
+{
+	struct auth_realm *new = NULL;
+	struct passwd *pwd;
+	const char *new_pass = NULL;
+
+#ifdef HAVE_SHADOW
+	struct spwd *spwd;
+#endif
+
+	/* given password refers to a passwd entry */
+	if ((strlen(pass) > 3) && !strncmp(pass, "$p$", 3)) {
+#ifdef HAVE_SHADOW
+		/* try to resolve shadow entry */
+		spwd = getspnam(&pass[3]);
+		if (spwd)
+			new_pass = spwd->sp_pwdp;
+#endif
+		if (!new_pass) {
+			pwd = getpwnam(&pass[3]);
+			if (pwd && pwd->pw_passwd && pwd->pw_passwd[0] &&
+			    pwd->pw_passwd[0] != '!')
+				new_pass = pwd->pw_passwd;
+		}
+	} else {
+		new_pass = pass;
+	}
+
+	if (!new_pass || !new_pass[0])
+		return;
+
+	new = calloc(1, sizeof(*new));
+	if (!new)
+		return;
+
+	snprintf(new->path, sizeof(new->path), "%s", path);
+	snprintf(new->user, sizeof(new->user), "%s", user);
+	snprintf(new->pass, sizeof(new->user), "%s", new_pass);
+	list_add(&new->list, &auth_realms);
+}

main.c

@@ -40,6 +40,64 @@ static int run_server(void)
 	return 0;
 }
 
+static void uh_config_parse(void)
+{
+	const char *path = conf.file;
+	FILE *c;
+	char line[512];
+	char *col1;
+	char *col2;
+	char *eol;
+
+	if (!path)
+		path = "/etc/httpd.conf";
+
+	c = fopen(path, "r");
+	if (!c)
+		return;
+
+	memset(line, 0, sizeof(line));
+
+	while (fgets(line, sizeof(line) - 1, c)) {
+		if ((line[0] == '/') && (strchr(line, ':') != NULL)) {
+			if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
+				!(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
+				!(eol = strchr(col2, '\n')) || (*eol++  = 0))
+				continue;
+
+			uh_auth_add(line, col1, col2);
+		} else if (!strncmp(line, "I:", 2)) {
+			if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
+				!(eol = strchr(col1, '\n')) || (*eol++  = 0))
+				continue;
+
+			uh_index_add(strdup(col1));
+		} else if (!strncmp(line, "E404:", 5)) {
+			if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
+				!(eol = strchr(col1, '\n')) || (*eol++  = 0))
+				continue;
+
+			conf.error_handler = strdup(col1);
+		}
+#ifdef HAVE_CGI
+		else if ((line[0] == '*') && (strchr(line, ':') != NULL)) {
+			if (!(col1 = strchr(line, '*')) || (*col1++ = 0) ||
+				!(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
+				!(eol = strchr(col2, '\n')) || (*eol++  = 0))
+				continue;
+
+			if (!uh_interpreter_add(col1, col2))
+				fprintf(stderr,
+						"Unable to add interpreter %s for extension %s: "
+						"Out of memory\n", col2, col1
+				);
+		}
+#endif
+	}
+
+	fclose(c);
+}
+
 static void add_listener_arg(char *arg, bool tls)
 {
 	char *host = NULL;
@@ -102,5 +160,7 @@ int main(int argc, char **argv)
 		}
 	}
 
+	uh_config_parse();
+
 	return run_server();
 }

uhttpd.h

@@ -49,6 +49,13 @@ struct config {
 	int http_keepalive;
 };
 
+struct auth_realm {
+	struct list_head list;
+	char path[PATH_MAX];
+	char user[32];
+	char pass[128];
+};
+
 enum http_method {
 	UH_HTTP_MSG_GET,
 	UH_HTTP_MSG_POST,
@@ -146,4 +153,6 @@ uh_client_error(struct client *cl, int code, const char *summary, const char *fm
 
 void uh_handle_file_request(struct client *cl);
 
+void uh_auth_add(const char *path, const char *user, const char *pass);
+
 #endif