commit fc63839cd43f440da32bbccd9c24d96f1776a406
from: Omar Polo <op@omarpolo.com>
date: Sun Feb 04 18:56:06 2024 UTC

use something better to decide if a path is under another

commit - d35e18b31b0e05c6178a6bfa891dd2e2dadf3db1
commit + fc63839cd43f440da32bbccd9c24d96f1776a406
blob - c33b2d778d3419cdbf24d4f84a62c70d46dd615b
blob + fb54ae0bb70aaf765f0789790c05fe8452d8cfc6
--- certs.c
+++ certs.c
@@ -247,6 +247,29 @@ ccert(const char *name)
 	return (NULL);
 }
 
+/*
+ * Test whether the test path is under the certificate path.
+ */
+static inline int
+path_under(const char *cpath, const char *tpath)
+{
+	if (*cpath == '\0')
+		return (1);
+
+	while (*cpath != '\0') {
+		if (*tpath == '\0')
+			return (0);
+
+		if (*cpath++ != *tpath++)
+			return (0);
+	}
+
+	if (*tpath == '\0' || *tpath == '/')
+		return (1);
+
+	return (cpath[-1] == '/');
+}
+
 const char *
 cert_for(struct iri *iri)
 {
@@ -258,7 +281,7 @@ cert_for(struct iri *iri)
 
 		if (!strcmp(c->host, iri->iri_host) &&
 		    !strcmp(c->port, iri->iri_portstr) &&
-		    !strncmp(c->path, iri->iri_path, strlen(c->path)))
+		    path_under(c->path, iri->iri_path))
 			return (c->cert);
 	}