inspect-cert-chain 0.0.17

OpenSSL-like text output for debugging certificate chains
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

use std::io;

use byteorder::{BigEndian, ByteOrder as _};
use const_oid::{
    db::rfc5912::{ID_EC_PUBLIC_KEY, RSA_ENCRYPTION},
    ObjectIdentifier,
};
use der::Decode as _;
use itertools::Itertools as _;
use x509_cert::Certificate;

use crate::{ext, util};

pub(crate) fn write_cert_info(cert: &Certificate, mut wrt: impl io::Write) -> io::Result<()> {
    let tbs = &cert.tbs_certificate;

    let tbs_cert = &tbs;
    writeln!(wrt, "Subject: {}", tbs_cert.subject)?;

    writeln!(wrt, "Issuer: {}", tbs.issuer)?;

    writeln!(wrt, "Version: {:?}", tbs.version)?;
    writeln!(
        wrt,
        "Serial Number:\n  {}",
        util::openssl_hex(tbs.serial_number.as_bytes(), 20).join("\n  ")
    )?;

    writeln!(
        wrt,
        "Signature Algorithm: {}",
        util::oid_desc_or_raw(&cert.signature_algorithm.oid)
    )?;
    util::assert_null_params(&cert.signature_algorithm);

    // TODO: doesn't work ?
    writeln!(
        wrt,
        "Issuer Serial Number:\n  {}",
        tbs.issuer_unique_id
            .as_ref()
            .map(|serial| util::openssl_hex(serial.as_bytes().unwrap(), 20).join("\n  "))
            .unwrap_or_else(|| "<unknown>".to_owned())
    )?;
    writeln!(wrt, "Validity:")?;
    writeln!(
        wrt,
        "  Not Before: {} ({})",
        tbs.validity.not_before,
        util::duration_since_now_fmt(tbs.validity.not_before),
    )?;
    writeln!(
        wrt,
        "  Not After: {} ({})",
        tbs.validity.not_after,
        util::duration_since_now_fmt(tbs.validity.not_after),
    )?;

    // if let Some(name_constraints) = anchor.name_constraints {
    //     writeln!(w, "Name Constraints: {:?}", name_constraints);
    // }

    writeln!(wrt, "Subject Public Key Info:")?;

    let spki = &tbs_cert.subject_public_key_info;
    let alg = &spki.algorithm;

    match () {
        _ if alg.oid == ID_EC_PUBLIC_KEY => {
            let ec_subtype = alg
                .parameters
                .as_ref()
                .unwrap()
                .decode_as::<ObjectIdentifier>()
                .unwrap();

            let ec_type = util::oid_desc_or_raw(&alg.oid);
            let ec_subtype = util::oid_desc_or_raw(&ec_subtype);

            let public_key_bytes = spki.subject_public_key.as_bytes().unwrap();
            let public_key = util::openssl_hex(public_key_bytes, 15).join("\n    ");

            writeln!(wrt, "  Algorithm: {ec_type} ({ec_subtype})")?;
            writeln!(wrt, "  Public Key:\n    {public_key}")?;
        }

        _ if alg.oid == RSA_ENCRYPTION => {
            let algorithm = util::oid_desc_or_raw(&alg.oid);
            writeln!(wrt, "  Algorithm: {algorithm}")?;

            let rsa_details =
                pkcs1::RsaPublicKey::from_der(spki.subject_public_key.as_bytes().unwrap()).unwrap();

            writeln!(wrt, "  RSA:")?;

            let exp_bytes = rsa_details.public_exponent.as_bytes();
            let exp = BigEndian::read_uint(exp_bytes, exp_bytes.len());
            writeln!(wrt, "    Exponent: {exp} (0x{exp:0x})")?;
            let mod_bytes = rsa_details.modulus.as_bytes();
            writeln!(
                wrt,
                "    Modulus({} bit):\n      {}",
                mod_bytes.len() * 8,
                util::openssl_hex(mod_bytes, 32).join("\n      ")
            )?;
        }

        _ => {
            let alg = util::oid_desc_or_raw(&alg.oid);
            writeln!(wrt, "  Algorithm: {alg}")?;
        }
    }

    if let Some(extensions) = &tbs.extensions {
        writeln!(wrt, "Extensions:")?;

        for ext in extensions {
            writeln!(
                wrt,
                "  ID: {}{}",
                util::oid_desc_or_raw(&ext.extn_id),
                if ext.critical { " (critical)" } else { "" }
            )?;
            writeln!(wrt, "  Extension value:\n    {}", ext::interpret_val(ext))?;
            writeln!(wrt)?;
        }
    }

    writeln!(wrt, "Signature:")?;
    writeln!(
        wrt,
        "  {}",
        util::openssl_hex(cert.signature.as_bytes().unwrap(), 20).join("\n  ")
    )?;

    Ok(())
}