New standard linked list to use, rather than adhoc SignKeyList or TCPFwdList

--HG--
branch : agent-client
extra : convert_revision : 5465e639cc3f5ee0c6c55f0de6e7b6d5a8769da3

signkey.h

@@ -29,8 +29,22 @@
 #include "dss.h"
 #include "rsa.h"
 
+
+/* Sources for signing keys */
+typedef enum {
+	SIGNKEY_SOURCE_RAW_FILE,
+	SIGNKEY_SOURCE_AGENT,
+	SIGNKEY_SOURCE_INVALID,	
+} signkey_source;
+
 struct SIGN_key {
 
+	int type; /* The type of key (dss or rsa) */
+	signkey_source source;
+	char *filename;
+	/* the buffer? for encrypted keys, so we can later get
+	 * the private key portion */
+
 #ifdef DROPBEAR_DSS
 	dss_key * dsskey;
 #endif