Java
Chilkat2 Java
Verify and Unwrap S/MIME, and get Information about CMS Signature
See more MIME Examples
Demonstrates calling the Verify method to verify and unwrap S/MIME. The MIME is restored to the original structure that it would have originally had prior to signing. The Verify method works with both detached signatures, as well as opaque/attached signatures.Calls LastJsonData to get information about the signature(s) that were verified.
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import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.DtObj;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Mime;
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.
Mime mime = new Mime();
// Load the signed MIME from a file...
try {
mime.loadMimeFile("qa_data/mime/detached_sig.eml");
// Verify the S/MIME and restore the MIME
// to the structure/content it had prior to signing.
mime.verify();
} catch (ChilkatException e) {
System.out.println(e.getLastErrorText());
return;
}
// Examine the details of what was verified.
JsonObject json = new JsonObject();
mime.getLastJsonData(json);
json.setEmitCompact(false);
System.out.println(json.emit());
// The code to parse the following JSON (i.e. extract desired information) is shown below..
// {
// "pkcs7": {
// "verify": {
// "certs": [
// {
// "issuerCN": "VeriSign Class 1 Public Primary Certification Authority - G3",
// "serial": "0702A21A85B84B659E180A6EE6F5A365"
// },
// {
// "issuerCN": "VeriSign Class 1 Public Primary Certification Authority - G3",
// "serial": "008B5B75568454850B00CFAF3848CEB1A4"
// },
// {
// "issuerCN": "Symantec Class 1 Individual Subscriber CA - G5",
// "serial": "619C55C32FF6BD1A7B7E0330D21C8F3C"
// }
// ],
// "digestAlgorithms": [
// "sha1"
// ],
// "signerInfo": [
// {
// "cert": {
// "serialNumber": "619C55C32FF6BD1A7B7E0330D21C8F3C",
// "issuerCN": "Symantec Class 1 Individual Subscriber CA - G5",
// "digestAlgOid": "1.3.14.3.2.26",
// "digestAlgName": "SHA1"
// },
// "contentType": "1.2.840.113549.1.7.1",
// "signingTime": "160428055000Z",
// "messageDigest": "2hJJVmO/jtaJV5uCKMFzIkRRvtY=",
// "signingAlgOid": "1.2.840.113549.1.1.1",
// "signingAlgName": "RSA-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": "160428055000Z"
// },
// "1.2.840.113549.1.9.4": {
// "name": "messageDigest",
// "digest": "2hJJVmO/jtaJV5uCKMFzIkRRvtY="
// },
// "1.2.840.113549.1.9.15": {
// "der": "MFAwCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMA4GCCqGSIb3DQMCAgIAgDANBggqhkiG9w0DAgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIBKA=="
// },
// "1.3.6.1.4.1.311.16.4": {
// "der": "MIG7MIG...7fgMw0hyPPA=="
// }
// }
// }
// ]
// }
// }
// }
// Use this online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON
DtObj signingTime = new DtObj();
DtObj authAttrSigningTimeUtctime = new DtObj();
String issuerCN = "";
String serial = "";
String strVal = "";
String certSerialNumber = "";
String certIssuerCN = "";
String certDigestAlgOid = "";
String certDigestAlgName = "";
String contentType = "";
String messageDigest = "";
String signingAlgOid = "";
String signingAlgName = "";
String authAttrContentTypeName = "";
String authAttrContentTypeOid = "";
String authAttrSigningTimeName = "";
String authAttrMessageDigestName = "";
String authAttrMessageDigestDigest = "";
String authAttr1_2_840_113549_1_9_15Der = "";
String authAttr1_3_6_1_4_1_311_16_4Der = "";
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);
certSerialNumber = json.stringOf("pkcs7.verify.signerInfo[i].cert.serialNumber");
certIssuerCN = json.stringOf("pkcs7.verify.signerInfo[i].cert.issuerCN");
certDigestAlgOid = json.stringOf("pkcs7.verify.signerInfo[i].cert.digestAlgOid");
certDigestAlgName = json.stringOf("pkcs7.verify.signerInfo[i].cert.digestAlgName");
contentType = json.stringOf("pkcs7.verify.signerInfo[i].contentType");
json.dtOf("pkcs7.verify.signerInfo[i].signingTime", false, signingTime);
messageDigest = json.stringOf("pkcs7.verify.signerInfo[i].messageDigest");
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");
authAttr1_2_840_113549_1_9_15Der = json.stringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.2.840.113549.1.9.15\".der");
authAttr1_3_6_1_4_1_311_16_4Der = json.stringOf("pkcs7.verify.signerInfo[i].authAttr.\"1.3.6.1.4.1.311.16.4\".der");
i = i + 1;
}
}
}