enprot 0.4.1

Engyon Protected Text (EPT) — confidentiality processor and capability ledger
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

// Integration tests for provenance manifest + attest (TODO.roadmap/51).

use assert_cmd::Command;
use std::fs;
use tempfile::tempdir;

fn write(path: &std::path::Path, contents: &str) {
    if let Some(parent) = path.parent() {
        fs::create_dir_all(parent).unwrap();
    }
    fs::write(path, contents).unwrap();
}

#[test]
fn manifest_walks_tree_and_emits_include_per_file() {
    let proj = tempdir().unwrap();
    let cas = tempdir().unwrap();
    write(&proj.path().join("a.txt"), "alpha");
    write(&proj.path().join("sub/b.txt"), "beta");

    let manifest_path = proj.path().join("manifest.ept");
    Command::cargo_bin("enprot")
        .unwrap()
        .current_dir(proj.path())
        .args(["manifest"])
        .arg(proj.path())
        .args(["-c"])
        .arg(cas.path())
        .args(["--output"])
        .arg(&manifest_path)
        .assert()
        .success();

    let body = fs::read_to_string(&manifest_path).unwrap();
    assert!(body.contains("INCLUDE"), "got: {body}");
    assert!(body.contains("# path: a.txt"));
    assert!(body.contains("# path: sub/b.txt"));
    // CAS directory should contain 2 hash-named files.
    let cas_entries = std::fs::read_dir(cas.path()).unwrap().count();
    assert_eq!(cas_entries, 2);
}

#[test]
fn manifest_to_stdout_works() {
    let proj = tempdir().unwrap();
    let cas = tempdir().unwrap();
    write(&proj.path().join("a.txt"), "alpha");

    let out = Command::cargo_bin("enprot")
        .unwrap()
        .args(["manifest"])
        .arg(proj.path())
        .args(["-c"])
        .arg(cas.path())
        .assert()
        .success();
    let s = std::str::from_utf8(&out.get_output().stdout).unwrap();
    assert!(s.contains("INCLUDE"));
}

#[test]
fn attest_signs_manifest_and_verify_chain_accepts_it() {
    let proj = tempdir().unwrap();
    let cas = tempdir().unwrap();
    write(&proj.path().join("a.txt"), "alpha");

    let manifest_path = proj.path().join("manifest.ept");
    let builder_priv = proj.path().join("builder.pem");
    let builder_pub = proj.path().join("builder.pub");

    Command::cargo_bin("enprot")
        .unwrap()
        .args(["keygen", "ed25519"])
        .args(["--out-priv", builder_priv.to_str().unwrap()])
        .args(["--out-pub", builder_pub.to_str().unwrap()])
        .assert()
        .success();

    Command::cargo_bin("enprot")
        .unwrap()
        .args(["manifest"])
        .arg(proj.path())
        .args(["-c"])
        .arg(cas.path())
        .args(["--output"])
        .arg(&manifest_path)
        .assert()
        .success();

    Command::cargo_bin("enprot")
        .unwrap()
        .args(["attest"])
        .args(["--signer", builder_priv.to_str().unwrap()])
        .arg(&manifest_path)
        .assert()
        .success();

    let body = fs::read_to_string(&manifest_path).unwrap();
    assert!(body.contains("CHAIN"), "attest should append CHAIN: {body}");

    // verify-chain accepts the manifest with the builder's pubkey.
    Command::cargo_bin("enprot")
        .unwrap()
        .args(["verify-chain"])
        .args(["--trust-root", builder_pub.to_str().unwrap()])
        .arg(&manifest_path)
        .assert()
        .success();
}

#[test]
fn attest_detects_tampering_after_signature() {
    let proj = tempdir().unwrap();
    let cas = tempdir().unwrap();
    write(&proj.path().join("a.txt"), "alpha");

    let manifest_path = proj.path().join("manifest.ept");
    let builder_priv = proj.path().join("builder.pem");
    let builder_pub = proj.path().join("builder.pub");

    Command::cargo_bin("enprot")
        .unwrap()
        .args(["keygen", "ed25519"])
        .args(["--out-priv", builder_priv.to_str().unwrap()])
        .args(["--out-pub", builder_pub.to_str().unwrap()])
        .assert()
        .success();
    Command::cargo_bin("enprot")
        .unwrap()
        .args(["manifest"])
        .arg(proj.path())
        .args(["-c"])
        .arg(cas.path())
        .args(["--output"])
        .arg(&manifest_path)
        .assert()
        .success();
    Command::cargo_bin("enprot")
        .unwrap()
        .args(["attest"])
        .args(["--signer", builder_priv.to_str().unwrap()])
        .arg(&manifest_path)
        .assert()
        .success();

    // Tamper: change the path comment.
    let mut body = fs::read_to_string(&manifest_path).unwrap();
    body = body.replace("# path: a.txt", "# path: tampered.txt");
    fs::write(&manifest_path, body).unwrap();

    // verify-chain must fail because the payload_hash no longer
    // matches what the signature committed to.
    Command::cargo_bin("enprot")
        .unwrap()
        .args(["verify-chain"])
        .args(["--trust-root", builder_pub.to_str().unwrap()])
        .arg(&manifest_path)
        .assert()
        .failure();
}