uselesskey-token 0.9.0

API key, bearer, and OAuth access-token fixture generator for tests.
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

//! Additional property-based tests for token fixtures — Wave 91.
//!
//! Covers format invariants, character set compliance, authorization headers,
//! and variant isolation across all token specs with random seeds.

#[allow(
    dead_code,
    reason = "shared test-util module; only a subset is used per test file"
)]
mod testutil;

use base64::Engine as _;
use base64::engine::general_purpose::URL_SAFE_NO_PAD;
use proptest::prelude::*;

use uselesskey_core::{Factory, Seed};
use uselesskey_token::{TokenFactoryExt, TokenSpec};

proptest! {
    #![proptest_config(ProptestConfig { cases: 64, ..ProptestConfig::default() })]

    // =====================================================================
    // Character set invariants
    // =====================================================================

    #[test]
    fn prop_api_key_suffix_only_alphanumeric(seed in any::<[u8; 32]>()) {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token("prop-cs-api", TokenSpec::api_key());
        let suffix = tok.value().strip_prefix("uk_test_").unwrap();
        prop_assert!(
            suffix.chars().all(|c| c.is_ascii_alphanumeric()),
            "API key suffix must be base62"
        );
    }

    #[test]
    fn prop_bearer_no_standard_base64_chars(seed in any::<[u8; 32]>()) {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token("prop-cs-bearer", TokenSpec::bearer());
        let val = tok.value();
        prop_assert!(!val.contains('+'), "must not contain +");
        prop_assert!(!val.contains('/'), "must not contain /");
        prop_assert!(!val.contains('='), "must not contain padding");
    }

    #[test]
    fn prop_oauth_all_segments_valid_base64url(seed in any::<[u8; 32]>()) {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token("prop-cs-oauth", TokenSpec::oauth_access_token());
        for segment in tok.value().split('.') {
            prop_assert!(
                URL_SAFE_NO_PAD.decode(segment).is_ok(),
                "all OAuth segments must be valid base64url"
            );
        }
    }

    // =====================================================================
    // Authorization header invariants
    // =====================================================================

    #[test]
    fn prop_api_key_auth_header_starts_with_apikey(seed in any::<[u8; 32]>()) {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token("prop-auth-api", TokenSpec::api_key());
        let header = tok.authorization_header();
        prop_assert!(header.starts_with("ApiKey "));
        prop_assert!(header.ends_with(tok.value()));
    }

    #[test]
    fn prop_bearer_auth_header_starts_with_bearer(seed in any::<[u8; 32]>()) {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token("prop-auth-bearer", TokenSpec::bearer());
        let header = tok.authorization_header();
        prop_assert!(header.starts_with("Bearer "));
        prop_assert!(header.ends_with(tok.value()));
    }

    #[test]
    fn prop_oauth_auth_header_starts_with_bearer(seed in any::<[u8; 32]>()) {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token("prop-auth-oauth", TokenSpec::oauth_access_token());
        let header = tok.authorization_header();
        prop_assert!(header.starts_with("Bearer "));
        prop_assert!(header.ends_with(tok.value()));
    }

    // =====================================================================
    // Variant isolation
    // =====================================================================

    #[test]
    fn prop_variant_differs_from_default_all_specs(seed in any::<[u8; 32]>(), kind_idx in 0u8..3) {
        let spec = match kind_idx {
            0 => TokenSpec::api_key(),
            1 => TokenSpec::bearer(),
            _ => TokenSpec::oauth_access_token(),
        };
        let fx = Factory::deterministic(Seed::new(seed));
        let good = fx.token("prop-var", spec);
        let alt = fx.token_with_variant("prop-var", spec, "alt");
        prop_assert_ne!(good.value(), alt.value(), "variant should differ from default");
    }

    // =====================================================================
    // OAuth JWT payload sub matches label
    // =====================================================================

    #[test]
    fn prop_oauth_sub_matches_label(seed in any::<[u8; 32]>(), label in "[a-z][a-z0-9_-]{0,15}") {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token(&label, TokenSpec::oauth_access_token());
        let parts: Vec<&str> = tok.value().split('.').collect();
        let payload_bytes = URL_SAFE_NO_PAD.decode(parts[1]).unwrap();
        let claims: serde_json::Value = serde_json::from_slice(&payload_bytes).unwrap();
        prop_assert_eq!(claims["sub"].as_str().unwrap(), label.as_str());
    }

    // =====================================================================
    // Debug safety across all specs
    // =====================================================================

    #[test]
    fn prop_debug_does_not_leak_value(seed in any::<[u8; 32]>(), kind_idx in 0u8..3) {
        let spec = match kind_idx {
            0 => TokenSpec::api_key(),
            1 => TokenSpec::bearer(),
            _ => TokenSpec::oauth_access_token(),
        };
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token("prop-debug", spec);
        let dbg = format!("{tok:?}");
        prop_assert!(!dbg.contains(tok.value()), "Debug must not leak token value");
    }

    // =====================================================================
    // Variant-based tokens still have correct format
    // =====================================================================

    #[test]
    fn prop_variant_api_key_still_valid_format(seed in any::<[u8; 32]>(), variant in "[a-z]{1,8}") {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token_with_variant("prop-fmt-var", TokenSpec::api_key(), &variant);
        prop_assert!(tok.value().starts_with("uk_test_"));
        prop_assert_eq!(tok.value().len(), 40);
    }

    #[test]
    fn prop_variant_bearer_still_valid_format(seed in any::<[u8; 32]>(), variant in "[a-z]{1,8}") {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token_with_variant("prop-fmt-var", TokenSpec::bearer(), &variant);
        prop_assert_eq!(tok.value().len(), 43);
        prop_assert!(URL_SAFE_NO_PAD.decode(tok.value()).is_ok());
    }

    #[test]
    fn prop_variant_oauth_still_valid_format(seed in any::<[u8; 32]>(), variant in "[a-z]{1,8}") {
        let fx = Factory::deterministic(Seed::new(seed));
        let tok = fx.token_with_variant("prop-fmt-var", TokenSpec::oauth_access_token(), &variant);
        let parts: Vec<&str> = tok.value().split('.').collect();
        prop_assert_eq!(parts.len(), 3);
    }
}