I have a requirement for slate integration. I have a code for posting data but I want it to convert into java. Below is the code for reference:
'''string host = #url;
string certName = #"myfile.pfx"; // i am having .pem file
string password = #"password"; // no password
var certificate = new System.Security.Cryptography.X509Certificates.X509Certificate2(certName,
password);
System.Net.ServicePointManager.ServerCertificateValidationCallback = (a, b, c, d) => true;
var req = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(host);
req.PreAuthenticate = true;
req.Credentials = new System.Net.NetworkCredential("username", "");
req.ClientCertificates.Add(certificate);
req.Method = "POST";
req.ContentType = "text/xml";
string postData = "<hello>world</hello>";
byte[] postBytes = System.Text.Encoding.UTF8.GetBytes(postData);
req.ContentLength = postBytes.Length;
req.GetRequestStream().Write(postBytes, 0, postBytes.Length);
req.GetRequestStream().Close();
var resp = req.GetResponse();'''
Please help in converting c code to java code or in generating a certificate from .pem file. I have checked many links in google but it's not working for me. It is throwing incomplete data or empty data while generating certificate from .pem file.
Thanks in advance,
If you want read the certificate you can use this below java code.
CertificateFactory fact = CertificateFactory.getInstance("X.509");
FileInputStream is = new FileInputStream (pemfilepath);
X509Certificate cer = (X509Certificate) fact.generateCertificate(is);
PublicKey key = cer.getPublicKey();
If you want something else let me know
Related
I'm generating CMS signature files with external PKCS#1 based on this thread.
The first step is obtain the signed attributes from the original file to be signed in external application which is returning PKCS#1 byte array.
Then build standard org.bouncycastle.cms.SignerInfoGenerator with original file hash, signed data (PKCS#1) and certificate to add to CMS, and finally create the attached signature.
But when i'd tried to validate it using this code:
String originalFile = "aG9sYQ0KYXNkYXMNCg0KYWZzDQo=";
String cmsSignedFile = "MIAGCSqGSIb3DQEHAqCAMIACAQExDzANBg...j2Dwytp6kzQNwtXGO8QbWty1lOo8oYm+6LR8EWba3ikO/m9ol/G808vit9gAAAAAAAA==";
byte[] signedByte = DatatypeConverter.parseBase64Binary(cmsSignedFile);
Security.addProvider(new BouncyCastleProvider());
CMSSignedData s = new CMSSignedData(new CMSProcessableByteArray(DatatypeConverter.parseBase64Binary(originalFile)), signedByte);
SignerInformationStore signers = s.getSignerInfos();
SignerInformation signerInfo = (SignerInformation)signers.getSigners().iterator().next();
FileInputStream fis = new FileInputStream("C:/myCertificate.cer");
CertificateFactory cf = CertificateFactory.getInstance("X.509");
X509Certificate cert = (X509Certificate)cf.generateCertificates(fis).iterator().next();
boolean result = signerInfo.verify(new JcaSimpleSignerInfoVerifierBuilder().setProvider("BC").build(cert.getPublicKey()));
System.out.println("Verified: "+result);
I get Verified: false
I'm adding Content Type, Signing time, Message digest and OCSP as signed attributes and TSP Token as unsigned attribute (I'm not sure if this is right).
I'm also trying to recover data from CMS signature, using the code below:
//load cms signed file with attached data
CMSSignedData cms = new CMSSignedData(FileUtils.readFileToByteArray(new File("C:/tmp/tempFile1864328163858309463.cms")));
System.out.println(cms.getSignerInfos().getSigners().iterator().next().getDigestAlgorithmID().getAlgorithm().getId());
System.out.println(Hex.encodeHexString(cms.getSignerInfos().getSigners().iterator().next().getSignature()));
//recover signer certificate info
Store certs = cms.getCertificates();
Collection<X509CertificateHolder> col = certs.getMatches(null);
X509CertificateHolder []h1 = col.toArray(new X509CertificateHolder[col.size()]);
X509CertificateHolder firmante = h1[0];
System.out.println(firmante.getSubject());
System.out.println(h1[1].getSubject());
SignerInformation sinfo = cms.getSignerInfos().getSigners().iterator().next();
//recover OCSP information
//THIS FAILS :(
// Store infocspbasic = cms.getOtherRevocationInfo(OCSPObjectIdentifiers.id_pkix_ocsp_basic);
// Object basic = infocspbasic.getMatches(null).iterator().next();
//recover signing time
if (sinfo.getSignedAttributes() != null) {
Attribute timeStampAttr = sinfo.getSignedAttributes().get(PKCSObjectIdentifiers.pkcs_9_at_signingTime);
ASN1Encodable attrValue = timeStampAttr.getAttrValues().getObjectAt(0);
final Date signingDate;
if (attrValue instanceof ASN1UTCTime) {
ASN1UTCTime time = ASN1UTCTime.getInstance(attrValue);
Date d = time.getDate();
System.out.println("ASN1UTCTime:" + d);
} else if (attrValue instanceof Time) {
signingDate = ((Time) attrValue).getDate();
} else if (attrValue instanceof ASN1GeneralizedTime) {
System.out.println("ASN1GeneralizedTimeASN1GeneralizedTime");
} else {
signingDate = null;
}
}
//recover timestamp TOken
//unsigned attributes are null :(
if (sinfo.getUnsignedAttributes() != null) {
Attribute timeStampAttr = sinfo.getUnsignedAttributes().get(PKCSObjectIdentifiers.id_aa_signatureTimeStampToken);
for (ASN1Encodable value : timeStampAttr.getAttrValues().toArray()) {
TimeStampToken token = new TimeStampToken(new CMSSignedData(value.toASN1Primitive().getEncoded()));
System.out.println(token.getTimeStampInfo().getGenTime());
}
}
But I can't retrieve OCSP response nor TSP Token information. Additionally I've downloaded this viewer software to help verify it:
Any help would be very appreciated.
I found a project named j4sign which implements CMS signature with external PKCS#1. The link goes to the project's forum where I posted the code sample using their classes and the final correction to make the validation works.
Please, could someone point me in the right direction to digitally sign an MS-Office document (docx, xlsx, pptx) in Apache POI, or any other open source library?
I have already reviewed the classes under org.apache.poi.openxml4j.opc.signature but I cannot understand how I could add a signature to a document.
Check this sample code .. this sample code uses a file keystore PFX (PKCS12) .. Signs the Document and verify it.
// loading the keystore - pkcs12 is used here, but of course jks & co are also valid
// the keystore needs to contain a private key and it's certificate having a
// 'digitalSignature' key usage
char password[] = "test".toCharArray();
File file = new File("test.pfx");
KeyStore keystore = KeyStore.getInstance("PKCS12");
FileInputStream fis = new FileInputStream(file);
keystore.load(fis, password);
fis.close();
// extracting private key and certificate
String alias = "xyz"; // alias of the keystore entry
Key key = keystore.getKey(alias, password);
X509Certificate x509 = (X509Certificate)keystore.getCertificate(alias);
// filling the SignatureConfig entries (minimum fields, more options are available ...)
SignatureConfig signatureConfig = new SignatureConfig();
signatureConfig.setKey(keyPair.getPrivate());
signatureConfig.setSigningCertificateChain(Collections.singletonList(x509));
OPCPackage pkg = OPCPackage.open(..., PackageAccess.READ_WRITE);
signatureConfig.setOpcPackage(pkg);
// adding the signature document to the package
SignatureInfo si = new SignatureInfo();
si.setSignatureConfig(signatureConfig);
si.confirmSignature();
// optionally verify the generated signature
boolean b = si.verifySignature();
assert (b);
// write the changes back to disc
pkg.close();
Here's the sample source : https://poi.apache.org/apidocs/org/apache/poi/poifs/crypt/dsig/SignatureInfo.html
I hope this could help!
I am currently trying to adapt a few scripts we use to sign an encrypt/decrypt xml files using OpenSSL and S/MIME using Java and BouncyCastle.
The command to sign and encrypt our file:
openssl smime -sign -signer Pub1.crt -inkey Priv.key -in foo.xml | openssl smime -encrypt -out foo.xml.smime Pub2.crt Pub1.crt
This generates a signed and encrypted smime-file containing our xml file. Currently this happens using a set of shell scripts under linux using the OpenSSL library. In the future we want to integrate this process into our Java application.
I've found out that this should be possible using the BouncyCastle library (see this post). The answer there provides two Java classes showing how to sign and encrypt an email using BouncyCastle and S/MIME. Comparing this to our OpenSSL command it seems that many of the things needed to sign an encrypt an email is not needed in our approach.
Some more meta information from our generated files:
Signed file
MIME-Version: 1.0
Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg="sha-256"; boundary="----709621D94E0377688356FAAE5A2C1321"
Encrypted file
MIME-Version: 1.0
Content-Disposition: attachment; filename="smime.p7m"
Content-Type: application/x-pkcs7-mime; smime-type=enveloped-data; name="smime.p7m"
Content-Transfer-Encoding: base64
Is it even possible to sign and encrypt a simple file in the way we did it using OpenSSL? My current knowledge of signing and de/encryption is not very high at the moment so forgive me for not providing code samples. I guess what I am looking for is more input into what I need to do and maybe some expertise from people who have already done this. I hope this is the right place to ask this. If not, please correct me.
I had a similar question as you but I managed to solve it. I have to warn you, my knowledge about signing and encryption isn't that high either. But this code seemed to work for me.
In my case I used a personalsign pro 3 certificate from globalsign, Previously I just called openssl from within java. But the I wanted to clean my code and decided to use bouncy castle instead.
public static boolean signAllFiles(List<File> files) {
Boolean signingSucceeded = true;
KeyStore ks = null;
char[] password = null;
Security.addProvider(new BouncyCastleProvider());
try {
ks = KeyStore.getInstance("PKCS12");
password = "yourpass".toCharArray();
ks.load(new FileInputStream("full/path/to/your/original/certificate.pfx"), password);
} catch (Exception e) {
signingSucceeded = false;
}
// Get privatekey and certificate
X509Certificate cert = null;
PrivateKey privatekey = null;
try {
Enumeration<String> en = ks.aliases();
String ALIAS = "";
Vector<Object> vectaliases = new Vector<Object>();
while (en.hasMoreElements())
vectaliases.add(en.nextElement());
String[] aliases = (String[])(vectaliases.toArray(new String[0]));
for (int i = 0; i < aliases.length; i++)
if (ks.isKeyEntry(aliases[i]))
{
ALIAS = aliases[i];
break;
}
privatekey = (PrivateKey)ks.getKey(ALIAS, password);
cert = (X509Certificate)ks.getCertificate(ALIAS);
// publickey = ks.getCertificate(ALIAS).getPublicKey();
} catch (Exception e) {
signingSucceeded = false;
}
for (File source : files) {
String fileName = "the/path/andNameOfYourOutputFile";
try {
// Reading files which need to be signed
File fileToSign = source;
byte[] buffer = new byte[(int)fileToSign.length()];
DataInputStream in = new DataInputStream(new FileInputStream(fileToSign));
in.readFully(buffer);
in.close();
// Generate signature
ArrayList<X509Certificate> certList = new ArrayList<X509Certificate>();
certList.add(cert);
Store<?> certs = new JcaCertStore(certList);
CMSSignedDataGenerator signGen = new CMSSignedDataGenerator();
ContentSigner sha1signer = new JcaContentSignerBuilder("SHA1withRSA").setProvider("BC").build(
privatekey);
signGen.addSignerInfoGenerator(new JcaSignerInfoGeneratorBuilder(
new JcaDigestCalculatorProviderBuilder().build()).build(sha1signer, cert));
signGen.addCertificates(certs);
CMSTypedData content = new CMSProcessableByteArray(buffer);
CMSSignedData signedData = signGen.generate(content, false);
byte[] signeddata = signedData.getEncoded();
// Write signature to Fi File
FileOutputStream envfos = new FileOutputStream(fileName);
byte[] outputString = Base64.encode(signeddata);
int fullLines = (int)Math.floor(outputString.length / 64);
for (int i = 0; i < fullLines; i++) {
envfos.write(outputString, i * 64, 64);
envfos.write("\r\n".getBytes());
}
envfos.write(outputString, fullLines * 64, outputString.length % 64);
envfos.close();
} catch (Exception e) {
signingSucceeded = false;
}
}
return signingSucceeded;
}
This is only the code to sign a file, I hope it helps.
The following code loads test.cer file (Which is X509 Certificate) into memory. Is that possible to modify its fields when it is now in the memory, right? It is easy to output any field for example load.getPublicKey() but I want to change the first byte from the public key and output it again after changing. How would I do that?
File f= new File("Users/Desktop/JavaFolder/test.cer");
CertificateFactory cf = CertificateFactory.getInstance("X.509");
BufferedInputStream in = new BufferedInputStream(new FileInputStream(f));
while (in.available() > 0) {
Certificate load = cf.generateCertificate(in);
}
in.close();
After you have the Certificate:
Certificate cert = ....
PublicKey publicKey = cert.getPublicKey();
byte[] originalPublicKey = publicKey.getEncoded();
byte[] modifiedPublicKey = java.util.Arrays.copyOf(originalPublicKey , originalPublicKey .length);// make a copy
modifiedPublicKey[0] = !modifiedPublicKey[0]; // modify something
print(originalPublicKey); // your "print" method - implement it how you like it e.g., Arrays.toString(originalPublicKey)
print(modifiedPublicKey ); // your "print" method - implement it how you like it e.g., Arrays.toString(modifiedPublicKey)
See the javadoc reference
java.security.PublicKey
java.security.cert.Certificate
java.util.Arrays
I am new to Cryptography and so please excuse me if you think this is a basic question
I have a .p7b file which I need to read and extract the individual public certificates i.e the .cer files and store it in the key store. I need not worry about persisting in the key store as there is already a service which takes in the .cer file as byte[] and saves that.
What i want to know is , how do i read the .p7b and extract the individual .cer file? I know that can be done via the openSSL commands, but i need to do the same in java. I need to also read the Issued By name as that will be used as a unique key to persist the certificate.
Thanks in advance
You can get the certificates from a PKCS#7 object with BouncyCastle. Here is a quick code sample:
public Collection<X59Certificate> getCertificates(String path) throws Exception
{
Security.addProvider(new BouncyCastleProvider());
CMSSignedData sd = new CMSSignedData(new FileInputStream(path));
X509Store store = sd.getCertificates("Collection", "BC");
Collection<X509Certificate> certificates = store.getMatches(X509CertStoreSelector.getInstance(new X509CertSelector()));
return certificates;
}
Note that a PKCS#7 may contain more than one certificate. Most of the time it includes intermediate certification authority certificates required to build the certificate chain between the end-user certificate and the root CA.
I was successfully able to read the individual .X509 certificates from the p7b files. Here are the steps
First step includes, getting a byte[] from the java.io.File. The steps include to remove the -----BEGIN PKCS7----- and -----END PKCS7----- from the file, and decode the remaining base64 encoded String.
BufferedReader reader = new BufferedReader(new FileReader(file));
StringBuilder cerfile = new StringBuilder();
String line = null;
while(( line = reader.readLine())!=null){
if(!line.contains("PKCS7")){
cerfile.append(line);
}
}
byte[] fileBytes = Base64.decode(cerfile.toString().getBytes());
The next step is to use the BouncyCastle api to parse the file
CMSSignedData dataParser = new CMSSignedData(trustBundleByte);
ContentInfo contentInfo = dataParser.getContentInfo();
SignedData signedData = SignedData.getInstance(contentInfo.getContent());
CMSSignedData encapInfoBundle = new CMSSignedData(new CMSProcessableByteArray(signedData.getEncapContentInfo().getContent().getDERObject().getEncoded()),contentInfo);
SignedData encapMetaData = SignedData.getInstance(encapInfoBundle.getContentInfo().getContent());
CMSProcessableByteArray cin = new CMSProcessableByteArray(((ASN1OctetString)encapMetaData.getEncapContentInfo().getContent()).getOctets());
CertificateFactory ucf = CertificateFactory.getInstance("X.509");
CMSSignedData unsignedParser = new CMSSignedData(cin.getInputStream());
ContentInfo unsginedEncapInfo = unsignedParser.getContentInfo();
SignedData metaData = SignedData.getInstance(unsginedEncapInfo.getContent());
Enumeration certificates = metaData.getCertificates().getObjects();
// Build certificate path
while (certificates.hasMoreElements()) {
DERObject certObj = (DERObject) certificates.nextElement();
InputStream bin = new ByteArrayInputStream(certObj.getDEREncoded());
X509Certificate cert = (X509Certificate) ucf.generateCertificate(bin);
X500Name x500name = new JcaX509CertificateHolder(cert).getSubject();
RDN cn = x500name.getRDNs(BCStyle.CN)[0];
}
The above steps are working fine, but i am sure there are other solutions with less lines of code to achieve this. I am using bcjdk16 jars.