From 03b5debd958a324d5c00cc37f887130b0198e747 Mon Sep 17 00:00:00 2001
From: Mohammed Al Sahaf <msaa1990@gmail.com>
Date: Thu, 8 Apr 2021 17:45:19 +0000
Subject: [PATCH] ci: fuzz: add 4 more fuzzing targets (#4105)

---
 caddyconfig/caddyfile/formatter_fuzz.go       | 25 +++++++++++++++++
 caddyconfig/caddyfile/lexer_fuzz.go           | 28 +++++++++++++++++++
 duration_fuzz.go                              | 25 +++++++++++++++++
 .../caddyhttp/templates/frontmatter_fuzz.go   | 25 +++++++++++++++++
 4 files changed, 103 insertions(+)
 create mode 100644 caddyconfig/caddyfile/formatter_fuzz.go
 create mode 100644 caddyconfig/caddyfile/lexer_fuzz.go
 create mode 100644 duration_fuzz.go
 create mode 100644 modules/caddyhttp/templates/frontmatter_fuzz.go

diff --git a/caddyconfig/caddyfile/formatter_fuzz.go b/caddyconfig/caddyfile/formatter_fuzz.go
new file mode 100644
index 00000000..8be06345
--- /dev/null
+++ b/caddyconfig/caddyfile/formatter_fuzz.go
@@ -0,0 +1,25 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// 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.
+
+// +build gofuzz
+
+package caddyfile
+
+func FuzzFormat(input []byte) int {
+	formatted := Format(input)
+	if formatted != Format(formatted) {
+		return 1
+	}
+	return 0
+}
diff --git a/caddyconfig/caddyfile/lexer_fuzz.go b/caddyconfig/caddyfile/lexer_fuzz.go
new file mode 100644
index 00000000..29348446
--- /dev/null
+++ b/caddyconfig/caddyfile/lexer_fuzz.go
@@ -0,0 +1,28 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// 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.
+
+// +build gofuzz
+
+package caddyfile
+
+func FuzzTokenize(input []byte) int {
+	tokens, err := Tokenize(input, "Caddyfile")
+	if err != nil {
+		return 0
+	}
+	if len(tokens) == 0 {
+		return -1
+	}
+	return 1
+}
diff --git a/duration_fuzz.go b/duration_fuzz.go
new file mode 100644
index 00000000..e7afed3f
--- /dev/null
+++ b/duration_fuzz.go
@@ -0,0 +1,25 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// 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.
+
+// +build gofuzz
+
+package caddy
+
+func FuzzParseDuration(data []byte) int {
+	_, err := ParseDuration(string(data))
+	if err != nil {
+		return 0
+	}
+	return 1
+}
diff --git a/modules/caddyhttp/templates/frontmatter_fuzz.go b/modules/caddyhttp/templates/frontmatter_fuzz.go
new file mode 100644
index 00000000..8d8427b0
--- /dev/null
+++ b/modules/caddyhttp/templates/frontmatter_fuzz.go
@@ -0,0 +1,25 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// 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.
+
+// +build gofuzz
+
+package templates
+
+func FuzzExtractFrontMatter(data []byte) int {
+	_, _, err := extractFrontMatter(string(data))
+	if err != nil {
+		return 0
+	}
+	return 1
+}