barehttp 0.0.1

A minimal, explicit HTTP client for Rust with no_std support and blocking I/O
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160

use crate::parser::*;
extern crate alloc;
use alloc::vec::Vec;

#[test]
fn test_response_splitting_crlf_injection_in_reason() {
  let input = b"HTTP/1.1 200 OK\r\nInjected\r\nX-Evil: header\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err());
}

#[test]
fn test_request_smuggling_both_te_and_cl() {
  // RFC 9112 Section 6.3: Both TE and CL is a request smuggling attack vector
  // Client MUST reject this combination
  let input = b"HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\nContent-Length: 10\r\n\r\n5\r\nHello\r\n0\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err(), "Response with both TE and CL should be rejected");
}

#[test]
fn test_request_smuggling_conflicting_content_lengths() {
  // RFC 9112 Section 6.3: Duplicate Content-Length headers with different values
  // should be rejected to prevent request smuggling attacks
  let input = b"HTTP/1.1 200 OK\r\nContent-Length: 5\r\nContent-Length: 10\r\n\r\nHelloWorld";
  let result = Response::parse(input);
  // Our parser uses the first Content-Length (5), but the body is 10 bytes,
  // so it correctly rejects the extra data after reading 5 bytes
  assert!(result.is_err(), "Should reject conflicting Content-Length headers");
}

#[test]
fn test_header_injection_null_byte() {
  let input = b"HTTP/1.1 200 OK\r\nX-Header: value\x00injected\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_ok());
}

#[test]
fn test_oversized_chunk_size_overflow() {
  let input = b"HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\nFFFFFFFFFFFFFFFF\r\ndata\r\n0\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err());
}

#[test]
fn test_negative_content_length_rejected() {
  let input = b"HTTP/1.1 200 OK\r\nContent-Length: -1\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_ok());
  let response = result.unwrap();
  assert!(response.body.is_empty());
}

#[test]
fn test_chunked_extension_dos_attack() {
  let mut input = Vec::from(&b"HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n5"[..]);
  for _ in 0..1000 {
    input.extend_from_slice(b";ext=val");
  }
  input.extend_from_slice(b"\r\nHello\r\n0\r\n\r\n");
  let result = Response::parse(&input);
  assert!(result.is_ok());
}

#[test]
fn test_header_name_with_control_chars() {
  let input = b"HTTP/1.1 200 OK\r\nX-\x01Header: value\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err());
}

#[test]
fn test_bare_cr_in_header_value() {
  let input = b"HTTP/1.1 200 OK\r\nX-Header: val\rue\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err());
}

#[test]
fn test_multiple_transfer_encoding_headers() {
  let input =
    b"HTTP/1.1 200 OK\r\nTransfer-Encoding: gzip\r\nTransfer-Encoding: chunked\r\n\r\n5\r\nHello\r\n0\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_ok());
}

#[test]
fn test_whitespace_before_header_name() {
  let input = b"HTTP/1.1 200 OK\r\n Content-Type: text/html\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err());
}

#[test]
fn test_chunked_smuggling_incomplete_chunk() {
  let input = b"HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n5\r\nHello\r\n5\r\nWorld";
  let result = Response::parse(input);
  assert!(result.is_err());
}

#[test]
fn test_te_cl_desync_attack_prevention() {
  // RFC 9112 Section 6.3: TE+CL desync attack prevention
  // Client MUST reject responses with both headers
  let input = b"HTTP/1.1 200 OK\r\nContent-Length: 0\r\nTransfer-Encoding: chunked\r\n\r\n5\r\nHello\r\n0\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err(), "Response with both TE and CL should be rejected");
}

#[test]
fn test_unicode_in_reason_phrase() {
  let input = "HTTP/1.1 200 Café\r\n\r\n".as_bytes();
  let result = Response::parse(input);
  assert!(result.is_ok());
}

#[test]
fn test_extremely_large_content_length() {
  let input = b"HTTP/1.1 200 OK\r\nContent-Length: 999999999999999\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err());
}

#[test]
fn test_header_value_with_embedded_crlf() {
  let input = b"HTTP/1.1 200 OK\r\nX-Header: value\r\ninjected\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err());
}

#[test]
fn test_chunked_with_negative_size() {
  let input = b"HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n-5\r\nHello\r\n0\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err());
}

#[test]
fn test_transfer_encoding_identity_not_chunked() {
  let input = b"HTTP/1.1 200 OK\r\nTransfer-Encoding: identity\r\n\r\nPlaintext";
  let result = Response::parse(input);
  assert!(result.is_ok());
}

#[test]
fn test_header_with_vertical_tab() {
  let input = b"HTTP/1.1 200 OK\r\nX-Header:\x0Bvalue\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_ok());
}

#[test]
fn test_chunked_zero_chunk_not_last() {
  // RFC 9112 Section 6.3: Extra data after chunked terminator (0\r\n\r\n)
  // MUST NOT be processed as a separate response
  let input = b"HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n0\r\n\r\n5\r\nHello\r\n0\r\n\r\n";
  let result = Response::parse(input);
  assert!(result.is_err(), "Should reject extra data after chunked terminator");
}