fastcert 0.3.1

A simple zero-config tool for making locally-trusted development certificates
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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323

//! Integration tests for certificate signing and key size verification

mod common;

use common::get_test_lock;
use std::env;
use tempfile::TempDir;

#[test]
fn test_certificate_is_signed_by_ca() {
    let _lock = get_test_lock();
    // Setup: Create a temporary CA
    let temp_dir = TempDir::new().unwrap();
    let ca_path = temp_dir.path().to_path_buf();

    // Set CAROOT to use our temp directory
    unsafe {
        env::set_var("CAROOT", ca_path.to_str().unwrap());
    }

    // Generate a certificate - this will create the CA automatically
    let hosts = vec!["test.local".to_string(), "127.0.0.1".to_string()];
    let cert_file = temp_dir.path().join("test.pem");
    let key_file = temp_dir.path().join("test-key.pem");

    fastcert::cert::generate_certificate(
        &hosts,
        Some(cert_file.to_str().unwrap()),
        Some(key_file.to_str().unwrap()),
        None,  // p12_file
        false, // client cert
        false, // use ECDSA (default: RSA)
        false, // pkcs12
    )
    .unwrap();

    // Parse certificates using openssl command
    use std::process::Command;

    // Get certificate issuer
    let output = Command::new("openssl")
        .args(["x509", "-noout", "-issuer"])
        .arg("-in")
        .arg(&cert_file)
        .output()
        .unwrap();
    let cert_issuer = String::from_utf8_lossy(&output.stdout);

    // Get CA subject
    let output = Command::new("openssl")
        .args(["x509", "-noout", "-subject"])
        .arg("-in")
        .arg(ca_path.join("rootCA.pem"))
        .output()
        .unwrap();
    let ca_subject = String::from_utf8_lossy(&output.stdout);
    let ca_subject_err = String::from_utf8_lossy(&output.stderr);

    // The certificate's issuer should match the CA's subject
    println!("Certificate Issuer: {}", cert_issuer);
    println!("CA Subject: {}", ca_subject);
    if !ca_subject_err.is_empty() {
        println!("CA Subject Error: {}", ca_subject_err);
    }

    // Extract the CN from both
    assert!(
        cert_issuer.contains("fastcert"),
        "Certificate should be signed by fastcert CA, got: {}",
        cert_issuer
    );
    assert!(
        !cert_issuer.contains("rcgen self signed"),
        "Certificate should NOT be self-signed by rcgen"
    );

    // Verify certificate chain
    let output = Command::new("openssl")
        .args(["verify", "-CAfile"])
        .arg(ca_path.join("rootCA.pem"))
        .arg(&cert_file)
        .output()
        .unwrap();

    let verify_result = String::from_utf8_lossy(&output.stdout);
    let verify_err = String::from_utf8_lossy(&output.stderr);
    println!("Verification stdout: {}", verify_result);
    if !verify_err.is_empty() {
        println!("Verification stderr: {}", verify_err);
    }
    assert!(
        verify_result.contains("OK"),
        "Certificate should verify against CA, got: {} (stderr: {})",
        verify_result,
        verify_err
    );

    // Clean up
    unsafe {
        env::remove_var("CAROOT");
    }
}

#[test]
fn test_certificate_contains_correct_sans() {
    let _lock = get_test_lock();

    let temp_dir = TempDir::new().unwrap();
    let ca_path = temp_dir.path().to_path_buf();

    // Set CAROOT to use our temp directory
    unsafe {
        env::set_var("CAROOT", ca_path.to_str().unwrap());
    }

    let hosts = vec![
        "example.com".to_string(),
        "*.example.com".to_string(),
        "192.168.1.1".to_string(),
        "::1".to_string(),
    ];

    let cert_file = temp_dir.path().join("multi.pem");
    let key_file = temp_dir.path().join("multi-key.pem");

    fastcert::cert::generate_certificate(
        &hosts,
        Some(cert_file.to_str().unwrap()),
        Some(key_file.to_str().unwrap()),
        None,  // p12_file
        false, // client cert
        false, // use ECDSA (default: RSA)
        false, // pkcs12
    )
    .unwrap();

    // Verify SANs using openssl
    use std::process::Command;
    let output = Command::new("openssl")
        .args(["x509", "-noout", "-text"])
        .arg("-in")
        .arg(&cert_file)
        .output()
        .unwrap();

    let cert_text = String::from_utf8_lossy(&output.stdout);

    assert!(
        cert_text.contains("DNS:example.com"),
        "Should contain example.com"
    );
    assert!(
        cert_text.contains("DNS:*.example.com"),
        "Should contain wildcard"
    );
    assert!(
        cert_text.contains("IP Address:192.168.1.1"),
        "Should contain IPv4"
    );
    assert!(
        cert_text.contains("IP Address:0:0:0:0:0:0:0:1"),
        "Should contain IPv6"
    );

    // Clean up
    unsafe {
        env::remove_var("CAROOT");
    }
}

#[test]
fn test_ca_uses_rsa_3072() {
    let _lock = get_test_lock();

    let temp_dir = TempDir::new().unwrap();
    let ca_path = temp_dir.path().to_path_buf();

    // Set CAROOT to use our temp directory
    unsafe {
        env::set_var("CAROOT", ca_path.to_str().unwrap());
    }

    // Generate a certificate - this will create the CA automatically
    let hosts = vec!["test.local".to_string()];
    let cert_file = temp_dir.path().join("test.pem");
    let key_file = temp_dir.path().join("test-key.pem");

    fastcert::cert::generate_certificate(
        &hosts,
        Some(cert_file.to_str().unwrap()),
        Some(key_file.to_str().unwrap()),
        None,
        false,
        false, // RSA (default)
        false,
    )
    .unwrap();

    // Check CA key size using openssl
    use std::process::Command;
    let output = Command::new("openssl")
        .args(["rsa", "-noout", "-text"])
        .arg("-in")
        .arg(ca_path.join("rootCA-key.pem"))
        .output()
        .unwrap();

    let key_text = String::from_utf8_lossy(&output.stdout);
    println!("CA Key info: {}", key_text);

    assert!(
        key_text.contains("Private-Key: (3072 bit"),
        "CA should use RSA-3072, got: {}",
        key_text
    );

    // Clean up
    unsafe {
        env::remove_var("CAROOT");
    }
}

#[test]
fn test_certificate_uses_rsa_2048_by_default() {
    let _lock = get_test_lock();

    let temp_dir = TempDir::new().unwrap();
    let ca_path = temp_dir.path().to_path_buf();

    // Set CAROOT to use our temp directory
    unsafe {
        env::set_var("CAROOT", ca_path.to_str().unwrap());
    }

    let hosts = vec!["test.local".to_string()];
    let cert_file = temp_dir.path().join("test.pem");
    let key_file = temp_dir.path().join("test-key.pem");

    fastcert::cert::generate_certificate(
        &hosts,
        Some(cert_file.to_str().unwrap()),
        Some(key_file.to_str().unwrap()),
        None,
        false,
        false, // RSA (default)
        false,
    )
    .unwrap();

    // Check certificate key size using openssl
    use std::process::Command;
    let output = Command::new("openssl")
        .args(["rsa", "-noout", "-text"])
        .arg("-in")
        .arg(&key_file)
        .output()
        .unwrap();

    let key_text = String::from_utf8_lossy(&output.stdout);
    println!("Certificate Key info: {}", key_text);

    assert!(
        key_text.contains("Private-Key: (2048 bit"),
        "Certificate should use RSA-2048 by default, got: {}",
        key_text
    );

    // Clean up
    unsafe {
        env::remove_var("CAROOT");
    }
}

#[test]
fn test_certificate_uses_ecdsa_p256_with_flag() {
    let _lock = get_test_lock();

    let temp_dir = TempDir::new().unwrap();
    let ca_path = temp_dir.path().to_path_buf();

    // Set CAROOT to use our temp directory
    unsafe {
        env::set_var("CAROOT", ca_path.to_str().unwrap());
    }

    let hosts = vec!["test.local".to_string()];
    let cert_file = temp_dir.path().join("test.pem");
    let key_file = temp_dir.path().join("test-key.pem");

    fastcert::cert::generate_certificate(
        &hosts,
        Some(cert_file.to_str().unwrap()),
        Some(key_file.to_str().unwrap()),
        None,
        false,
        true, // ECDSA
        false,
    )
    .unwrap();

    // Check certificate key type using openssl
    use std::process::Command;
    let output = Command::new("openssl")
        .args(["ec", "-noout", "-text"])
        .arg("-in")
        .arg(&key_file)
        .output()
        .unwrap();

    let key_text = String::from_utf8_lossy(&output.stdout);
    println!("ECDSA Certificate Key info: {}", key_text);

    assert!(
        key_text.contains("ASN1 OID: prime256v1") || key_text.contains("NIST CURVE: P-256"),
        "Certificate should use ECDSA P-256 with --ecdsa flag, got: {}",
        key_text
    );

    // Clean up
    unsafe {
        env::remove_var("CAROOT");
    }
}