From 8404c16590fe901162bf4d05a21f2fb0de9448ce Mon Sep 17 00:00:00 2001
From: Stef Walter <stef@memberwebs.com>
Date: Wed, 8 Jul 2009 18:28:22 +0000
Subject: Find the right cookie if multiple are present. Also sign properly if
 no values.

---
 module/mod_auth_singleid.c | 90 +++++++++++++++++++++++-----------------------
 1 file changed, 45 insertions(+), 45 deletions(-)

diff --git a/module/mod_auth_singleid.c b/module/mod_auth_singleid.c
index 65f3342..94a39da 100644
--- a/module/mod_auth_singleid.c
+++ b/module/mod_auth_singleid.c
@@ -533,42 +533,6 @@ session_initialize (apr_pool_t *p, server_rec *s)
 	return status;
 }
 
-static const char*
-session_cookie_value (request_rec *r, const char *name)
-{
-	const char *cookies;
-	const char *value;
-	char *pair;
-
-	cookies = apr_table_get (r->headers_in, "Cookie");
-	if (cookies == NULL)
-		return NULL;
-
-	while (*cookies) {
-		pair = get_token (r->pool, &cookies, ";");
-		if (!pair)
-			break;
-		if (pair[0] == '$')
-			continue;
-
-		value = ap_stripprefix (pair, name);
-		if (value == pair)
-			continue;
-		while (isspace (*value))
-			++value;
-
-		if (*value != '=')
-			continue;
-		++value;
-		while (isspace (*value))
-			++value;
-
-		return value;
-	}
-
-	return NULL;
-}
-
 static char*
 session_create_sig (apr_pool_t *p, const char *value)
 {
@@ -595,19 +559,14 @@ session_validate_sig (apr_pool_t *p, const char *sig, const char *value)
 }
 
 static sid_session_t*
-session_load_info (sid_context_t *ctx, request_rec *r)
+session_parse_info (sid_context_t *ctx, request_rec *r, const char *value)
 {
 	sid_session_t *sess;
-	const char *value;
 	char *token, *sig, *end;
 	char *identifier;
 	char **here;
 	long expiry;
 
-	value = session_cookie_value (r, ctx->cookie_name);
-	if (!value)
-		return NULL;
-
 	sig = get_token (r->pool, &value, " ");
 	if (!sig || !session_validate_sig (r->pool, sig, value)) {
 		ap_log_rerror (APLOG_MARK, APLOG_WARNING, 0, r,
@@ -615,7 +574,7 @@ session_load_info (sid_context_t *ctx, request_rec *r)
 		return NULL;
 	}
 
-	/* The version of the session info, only 1 supported for now */
+	/* The version of the session info, only version 2 supported */
 	token = get_token (r->pool, &value, " ");
 	if (!token || strcmp (token, "2") != 0) {
 		ap_log_rerror (APLOG_MARK, APLOG_WARNING, 0, r,
@@ -664,6 +623,46 @@ session_load_info (sid_context_t *ctx, request_rec *r)
 	return sess;
 }
 
+static sid_session_t*
+session_load_info (sid_context_t *ctx, request_rec *r)
+{
+	sid_session_t *sess;
+	const char *cookies;
+	const char *value;
+	char *pair;
+
+	cookies = apr_table_get (r->headers_in, "Cookie");
+	if (cookies == NULL)
+		return NULL;
+
+	while (*cookies) {
+		pair = get_token (r->pool, &cookies, ";");
+		if (!pair)
+			break;
+		if (pair[0] == '$')
+			continue;
+
+		value = ap_stripprefix (pair, ctx->cookie_name);
+		if (value == pair)
+			continue;
+		while (isspace (*value))
+			++value;
+
+		if (*value != '=')
+			continue;
+		++value;
+		while (isspace (*value))
+			++value;
+
+		/* Try to parse this cookie */
+		sess = session_parse_info (ctx, r, value);
+		if (sess != NULL)
+			return sess;
+	}
+
+	return NULL;
+}
+
 static void
 session_send_info (sid_context_t *ctx, request_rec *r, sid_session_t *sess)
 {
@@ -676,8 +675,9 @@ session_send_info (sid_context_t *ctx, request_rec *r, sid_session_t *sess)
 		values = "";
 
 	/* Create the cookie value and sign it */
-	payload = apr_psprintf (r->pool, "2 %ld \"%s\" %s", (long)sess->expiry,
-	                        ap_escape_quotes (r->pool, sess->identifier), values);
+	payload = apr_psprintf (r->pool, "2 %ld \"%s\"%s%s", (long)sess->expiry,
+	                        ap_escape_quotes (r->pool, sess->identifier),
+	                        values && values[0] ? " " : "", values);
 	sig = session_create_sig (r->pool, payload);
 
 	/* Build up the full cookie spec */
-- 
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