Node.js

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. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var crypt = new chilkat.Crypt2();

    var outputFile = "qa_output/original.xml";
    var inFile = "qa_data/p7m/fattura_signature.xml.p7m";

    // Verify the signature and extract the contained file, which in this case is XML.
    success = crypt.VerifyP7M(inFile,outputFile);
    if (success == false) {
        console.log(crypt.LastErrorText);
        return;
    }

    console.log("Signature validated.");

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

    json.EmitCompact = false;
    console.log(json.Emit());

    // 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

    var authAttrSigningTimeUtctime = new chilkat.DtObj();
    var issuerCN;
    var serial;
    var strVal;
    var certSubjectKeyIdentifier;
    var certDigestAlgOid;
    var certDigestAlgName;
    var signingAlgOid;
    var signingAlgName;
    var authAttrContentTypeName;
    var authAttrContentTypeOid;
    var authAttrSigningTimeName;
    var authAttrMessageDigestName;
    var authAttrMessageDigestDigest;
    var authAttrSigningCertificateV2Name;
    var authAttrSigningCertificateV2Der;

    var i = 0;
    var count_i = json.SizeOfArray("pkcs7.verify.certs");
    while (i < count_i) {
        json.I = i;
        issuerCN = json.StringOf("pkcs7.verify.certs[i].issuerCN");
        serial = json.StringOf("pkcs7.verify.certs[i].serial");
        i = i+1;
    }

    i = 0;
    count_i = json.SizeOfArray("pkcs7.verify.digestAlgorithms");
    while (i < count_i) {
        json.I = i;
        strVal = json.StringOf("pkcs7.verify.digestAlgorithms[i]");
        i = i+1;
    }

    i = 0;
    count_i = json.SizeOfArray("pkcs7.verify.signerInfo");
    while (i < count_i) {
        json.I = i;
        certSubjectKeyIdentifier = json.StringOf("pkcs7.verify.signerInfo[i].cert.subjectKeyIdentifier");
        certDigestAlgOid = json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgOid");
        certDigestAlgName = json.StringOf("pkcs7.verify.signerInfo[i].cert.digestAlgName");
        signingAlgOid = json.StringOf("pkcs7.verify.signerInfo[i].signingAlgOid");
        signingAlgName = json.StringOf("pkcs7.verify.signerInfo[i].signingAlgName");
        authAttrContentTypeName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".name");
        authAttrContentTypeOid = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.3\".oid");
        authAttrSigningTimeName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".name");
        json.DtOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.5\".utctime",false,authAttrSigningTimeUtctime);
        authAttrMessageDigestName = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".name");
        authAttrMessageDigestDigest = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.4\".digest");
        authAttrSigningCertificateV2Name = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\".name");
        authAttrSigningCertificateV2Der = json.StringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.16.2.47\".der");
        i = i+1;
    }


}

chilkatExample();