Rust Requires Chilkat v11.0.0+

Verify a CAdES-BES Signature and Examine Signature Contents

See more Digital Signatures Examples

Demonstrates how to validate a .p7m (.p7s) signature and examine the contents of the signature. Rust

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

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

let output_file = "qa_output/original.xml".to_string();
let in_file = "qa_data/p7m/fattura_signature.xml.p7m".to_string();

// Verify the signature and extract the contained file, which in this case is XML.
if crypt.verify_p7_m(&in_file, &output_file).is_err() {
    println!("{}", crypt.last_error_text());
    return;
}

println!("Signature validated.");

// Now let's examine the information about the signature.
let json = chilkat::JsonObject::new();
crypt.get_last_json_data(&json);

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

// Here's an example of the information about the signature:
// {
//   "pkcs7": {
//     "verify": {
//       "certs": [
//         {
//           "issuerCN": "Xyz EU Qualified Certificates CA G1",
//           "serial": "99A28A51AC389999"
//         }
//       ],
//       "useConstructedOctets": true,
//       "digestAlgorithms": [
//         "sha256"
//       ],
//       "signerInfo": [
//         {
//           "cert": {
//             "subjectKeyIdentifier": "5VM4x8AWnXf07yzbXuLtbb0U3yY=",
//             "digestAlgOid": "2.16.840.1.101.3.4.2.1",
//             "digestAlgName": "SHA256"
//           },
//           "signingAlgOid": "1.2.840.113549.1.1.11",
//           "signingAlgName": "RSA-SHA256-PKCSV-1_5",
//           "authAttr": {
//             "1.2.840.113549.1.9.3": {
//               "name": "contentType",
//               "oid": "1.2.840.113549.1.7.1"
//             },
//             "1.2.840.113549.1.9.5": {
//               "name": "signingTime",
//               "utctime": "190901152340Z"
//             },
//             "1.2.840.113549.1.9.4": {
//               "name": "messageDigest",
//               "digest": "y+gd/zAQK33A//HInhaZba7w1fUJleV9AHbP1Ntx6U0="
//             },
//             "1.2.840.113549.1.9.16.2.47": {
//               "name": "signingCertificateV2",
//               "der": "MIH4MI..w4vv0="
//             }
//           }
//         }
//       ]
//     }
//   }
// }

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

let auth_attr_signing_time_utctime = chilkat::DtObj::new();

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

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.subjectKeyIdentifier").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].signingAlgOid").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].signingAlgName").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".name").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".oid").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".name").unwrap_or_default();
    let _ = json.dt_of("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".utctime", false, &auth_attr_signing_time_utctime);
    let _ = json.string_of("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".name").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".digest").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\".name").unwrap_or_default();
    let _ = json.string_of("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\".der").unwrap_or_default();
    i = i + 1;
}