Rust Requires Chilkat v11.0.0+

P7S - Access Signature Information (date/time, certificate used, etc.)

See more Digital Signatures Examples

Examine a PKCS7 signature (.p7s) and get information about it. Rust

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// First load the .p7s file into a BinData object..
let bd = chilkat::BinData::new();
if bd.load_file("qa_data/p7s/sample.p7s").is_err() {
    println!("Failed to load .p7s file.");
    return;
}

let crypt = chilkat::Crypt2::new();

// Assuming this is a signature that contains the original data that was signed..
if crypt.opaque_verify_bd(&bd).is_err() {
    println!("{}", crypt.last_error_text());
    return;
}

// Examine the last JSON data after signature verification..
let json = chilkat::JsonObject::new();
crypt.get_last_json_data(&json);

json.set_emit_compact(false);
println!("{}", json.emit().unwrap_or_default());

// Sample output...
// Go to http://tools.chilkat.io/jsonParse.cshtml
// and paste the JSON into the online form to generate JSON parsing code.

// {
//   "pkcs7": {
//     "verify": {
//       "digestAlgorithms": [
//         "sha256"
//       ],
//       "signerInfo": [
//         {
//           "cert": {
//             "serialNumber": "AAC5FC48C0FD8FBB",
//             "issuerCN": "AC ABCDEF RFB v5",
//             "issuerDN": "",
//             "digestAlgOid": "2.16.840.1.101.3.4.2.1",
//             "digestAlgName": "SHA-256"
//           },
//           "contentType": "1.2.840.113549.1.7.1",
//           "signingTime": "180607195054Z",
//           "messageDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=",
//           "signingAlgOid": "1.2.840.113549.1.1.11",
//           "signerDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8="
//         },
//         {
//           "cert": {
//             "serialNumber": "324FB38ABD59723F",
//             "issuerCN": "AC ABCDEF RFB v5",
//             "issuerDN": "",
//             "digestAlgOid": "2.16.840.1.101.3.4.2.1",
//             "digestAlgName": "SHA-256"
//           },
//           "contentType": "1.2.840.113549.1.7.1",
//           "signingTime": "180608182517Z",
//           "messageDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8=",
//           "signingAlgOid": "1.2.840.113549.1.1.11",
//           "signerDigest": "trzyxXbZ96z2M4mncyZ7BNMV4yIT92+5sS27Fu64iG8="
//         }
//       ]
//     }
//   }
// }
// 

let mut i: i32 = 0;
let mut count_i: i32 = 0;
let mut signing_time = String::new();
let dt = chilkat::DateTime::new();

i = 0;
count_i = json.size_of_array("pkcs7.verify.digestAlgorithms");
while i < count_i {
    json.set_i(i);
    let _ = json.string_of("pkcs7.verify.digestAlgorithms[i]").unwrap_or_default();
    i = i + 1;
}

i = 0;
count_i = json.size_of_array("pkcs7.verify.signerInfo");
while i < count_i {
    json.set_i(i);
    let _ = json.string_of("pkcs7.verify.signerInfo[i].cert.serialNumber").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].cert.issuerCN").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].cert.issuerDN").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].cert.digestAlgOid").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].cert.digestAlgName").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].contentType").unwrap_or_default();
    signing_time = json.string_of("pkcs7.verify.signerInfo[i].signingTime").unwrap_or_default();

    // The signingTime isin UTCTime format.
    // UTCTime values take the form of either "YYMMDDhhmm[ss]Z" or "YYMMDDhhmm[ss](+|-)hhmm"
    // Starting in Chilkat v9.5.0.77, the SetFromTimestamp method auto-recognizes the UTCTime format and parses it correctly.
    let _ = dt.set_from_timestamp(&signing_time).is_ok();
    // To get the signingTime in other date/time formats, look at the online reference documentation for CkDateTime.
    // There are numerous methods such as GetAsDateTime, GetAsIso8601, GetAsUnixTime, GetAsRfc822, etc.

    let _ = json.string_of("pkcs7.verify.signerInfo[i].messageDigest").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].signingAlgOid").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].signerDigest").unwrap_or_default();
    i = i + 1;
}

// println crypt.LastErrorText;
println!("Success.");