add dropbear pubkey auth patch from #582

SVN-Revision: 3916

openwrt/package/dropbear/patches/100-pubkey_path.patch

@@ -1,89 +1,45 @@
-diff -urN dropbear.old/svr-authpubkey.c dropbear.dev/svr-authpubkey.c
---- dropbear.old/svr-authpubkey.c	2005-12-09 06:42:33.000000000 +0100
-+++ dropbear.dev/svr-authpubkey.c	2005-12-12 01:35:32.139358750 +0100
-@@ -155,7 +155,6 @@
- 		unsigned char* keyblob, unsigned int keybloblen) {
- 
- 	FILE * authfile = NULL;
--	char * filename = NULL;
- 	int ret = DROPBEAR_FAILURE;
- 	buffer * line = NULL;
- 	unsigned int len, pos;
-@@ -176,17 +175,8 @@
+--- dropbear.old/svr-authpubkey.c.orig	2006-06-03 14:54:43.000000000 +0000
++++ dropbear.dev/svr-authpubkey.c	2006-06-03 15:03:19.000000000 +0000
+@@ -176,6 +176,8 @@
  		goto out;
  	}
  
--	/* we don't need to check pw and pw_dir for validity, since
--	 * its been done in checkpubkeyperms. */
--	len = strlen(ses.authstate.pw->pw_dir);
--	/* allocate max required pathname storage,
--	 * = path + "/.ssh/authorized_keys" + '\0' = pathlen + 22 */
--	filename = m_malloc(len + 22);
--	snprintf(filename, len + 22, "%s/.ssh/authorized_keys", 
--				ses.authstate.pw->pw_dir);
--
++	if (ses.authstate.pw->pw_uid != 0) {
++
+ 	/* we don't need to check pw and pw_dir for validity, since
+ 	 * its been done in checkpubkeyperms. */
+ 	len = strlen(ses.authstate.pw->pw_dir);
+@@ -187,6 +189,9 @@
+ 
  	/* open the file */
--	authfile = fopen(filename, "r");
-+	authfile = fopen("/etc/dropbear/authorized_keys", "r");
+ 	authfile = fopen(filename, "r");
++	} else {
++		authfile = fopen("/etc/dropbear/authorized_keys","r");
++	}
  	if (authfile == NULL) {
  		goto out;
  	}
-@@ -247,7 +237,6 @@
- 	if (line) {
- 		buf_free(line);
- 	}
--	m_free(filename);
- 	TRACE(("leave checkpubkey: ret=%d", ret))
- 	return ret;
- }
-@@ -255,12 +244,11 @@
- 
- /* Returns DROPBEAR_SUCCESS if file permissions for pubkeys are ok,
-  * DROPBEAR_FAILURE otherwise.
-- * Checks that the user's homedir, ~/.ssh, and
-- * ~/.ssh/authorized_keys are all owned by either root or the user, and are
-+ * Checks that /etc/dropbear and /etc/dropbear/authorized_keys
-+ * are all owned by either root or the user, and are
-  * g-w, o-w */
- static int checkpubkeyperms() {
- 
--	char* filename = NULL; 
- 	int ret = DROPBEAR_FAILURE;
- 	unsigned int len;
- 
-@@ -274,25 +262,11 @@
+@@ -274,6 +279,8 @@
  		goto out;
  	}
  
--	/* allocate max required pathname storage,
--	 * = path + "/.ssh/authorized_keys" + '\0' = pathlen + 22 */
--	filename = m_malloc(len + 22);
--	strncpy(filename, ses.authstate.pw->pw_dir, len+1);
--
--	/* check ~ */
--	if (checkfileperm(filename) != DROPBEAR_SUCCESS) {
--		goto out;
--	}
--
--	/* check ~/.ssh */
--	strncat(filename, "/.ssh", 5); /* strlen("/.ssh") == 5 */
--	if (checkfileperm(filename) != DROPBEAR_SUCCESS) {
-+	if (checkfileperm("/etc/dropbear") != DROPBEAR_SUCCESS) {
++	if (ses.authstate.pw->pw_uid != 0) {
++
+ 	/* allocate max required pathname storage,
+ 	 * = path + "/.ssh/authorized_keys" + '\0' = pathlen + 22 */
+ 	filename = m_malloc(len + 22);
+@@ -295,6 +302,14 @@
+ 	if (checkfileperm(filename) != DROPBEAR_SUCCESS) {
  		goto out;
  	}
- 
--	/* now check ~/.ssh/authorized_keys */
--	strncat(filename, "/authorized_keys", 16);
--	if (checkfileperm(filename) != DROPBEAR_SUCCESS) {
-+	if (checkfileperm("/etc/dropbear/authorized_keys") != DROPBEAR_SUCCESS) {
- 		goto out;
- 	}
- 
-@@ -300,7 +274,6 @@
++	} else {
++		if (checkfileperm("/etc/dropbear") != DROPBEAR_SUCCESS) {
++			goto out;
++		}
++		if (checkfileperm("/etc/dropbear/authorized_keys") != DROPBEAR_SUCCESS) {
++			goto out;
++		}
++	}
+ 
+ 	/* file looks ok, return success */
  	ret = DROPBEAR_SUCCESS;
- 	
- out:
--	m_free(filename);
- 
- 	TRACE(("leave checkpubkeyperms"))
- 	return ret;