Java 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. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Crypt2;
import com.chilkatsoft.chilkat2.DtObj;
import com.chilkatsoft.chilkat2.JsonObject;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Crypt2 crypt = new Crypt2();

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

        // Verify the signature and extract the contained file, which in this case is XML.
        try {
            crypt.verifyP7M(inFile, outputFile);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Signature validated.");

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

        json.setEmitCompact(false);
        System.out.println(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

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

        int i = 0;
        int count_i = json.sizeOfArray("pkcs7.verify.certs");
        while (i < count_i) {
            json.setI(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.setI(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.setI(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;
        }
    }
}