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fix: add pem support for cert sign

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This commit is contained in:
sbplat 2024-01-03 18:21:59 -05:00
parent 4b0df4ffd5
commit d96a3db60a
1 changed files with 57 additions and 22 deletions
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79
src/main/java/stirling/software/SPDF/controller/api/security/CertSignController.java
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@ -1,21 +1,37 @@
package stirling.software.SPDF.controller.api.security;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.Security;
import java.security.UnrecoverableKeyException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.util.Calendar;
import org.apache.pdfbox.examples.signature.CreateSignatureBase;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.interactive.digitalsignature.PDSignature;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openssl.PEMDecryptorProvider;
import org.bouncycastle.openssl.PEMEncryptedKeyPair;
import org.bouncycastle.openssl.PEMKeyPair;
import org.bouncycastle.openssl.PEMParser;
import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
import org.bouncycastle.openssl.jcajce.JceOpenSSLPKCS8DecryptorProviderBuilder;
import org.bouncycastle.openssl.jcajce.JcePEMDecryptorProviderBuilder;
import org.bouncycastle.operator.InputDecryptorProvider;
import org.bouncycastle.operator.OperatorCreationException;
import org.bouncycastle.pkcs.PKCS8EncryptedPrivateKeyInfo;
import org.bouncycastle.pkcs.PKCSException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.ResponseEntity;
@ -76,23 +92,27 @@ public class CertSignController {
throw new IllegalArgumentException("Cert type must be provided");
}
InputStream ksInputStream = null;
KeyStore ks = null;
switch (certType) {
case "PKCS12":
ksInputStream = p12File.getInputStream();
ks = KeyStore.getInstance("PKCS12");
ks.load(p12File.getInputStream(), password.toCharArray());
break;
case "PEM":
throw new IllegalArgumentException("TODO: PEM not supported yet");
// ksInputStream = privateKeyFile.getInputStream();
// break;
ks = KeyStore.getInstance("JKS");
ks.load(null);
PrivateKey privateKey = getPrivateKeyFromPEM(privateKeyFile.getBytes(), password);
Certificate cert = (Certificate) getCertificateFromPEM(certFile.getBytes());
ks.setKeyEntry(
"alias", privateKey, password.toCharArray(), new Certificate[] {cert});
break;
default:
throw new IllegalArgumentException("Invalid cert type: " + certType);
}
// TODO: page number
KeyStore ks = getKeyStore(ksInputStream, password);
CreateSignature createSignature = new CreateSignature(ks, password.toCharArray());
ByteArrayOutputStream baos = new ByteArrayOutputStream();
sign(pdf.getBytes(), baos, createSignature, name, location, reason);
@ -100,12 +120,6 @@ public class CertSignController {
baos, pdf.getOriginalFilename().replaceFirst("[.][^.]+$", "") + "_signed.pdf");
}
private static KeyStore getKeyStore(InputStream is, String password) throws Exception {
KeyStore ks = KeyStore.getInstance("PKCS12");
ks.load(is, password.toCharArray());
return ks;
}
private static void sign(
byte[] input,
OutputStream output,
@ -129,14 +143,35 @@ public class CertSignController {
}
}
// private byte[] parsePEM(byte[] content) throws IOException {
// PemReader pemReader =
// new PemReader(new InputStreamReader(new ByteArrayInputStream(content)));
// return pemReader.readPemObject().getContent();
// }
private PrivateKey getPrivateKeyFromPEM(byte[] pemBytes, String password)
throws IOException, OperatorCreationException, PKCSException {
try (PEMParser pemParser =
new PEMParser(new InputStreamReader(new ByteArrayInputStream(pemBytes)))) {
Object pemObject = pemParser.readObject();
JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider("BC");
PrivateKeyInfo pkInfo;
if (pemObject instanceof PKCS8EncryptedPrivateKeyInfo) {
InputDecryptorProvider decProv =
new JceOpenSSLPKCS8DecryptorProviderBuilder().build(password.toCharArray());
pkInfo = ((PKCS8EncryptedPrivateKeyInfo) pemObject).decryptPrivateKeyInfo(decProv);
} else if (pemObject instanceof PEMEncryptedKeyPair) {
PEMDecryptorProvider decProv =
new JcePEMDecryptorProviderBuilder().build(password.toCharArray());
pkInfo =
((PEMEncryptedKeyPair) pemObject)
.decryptKeyPair(decProv)
.getPrivateKeyInfo();
} else {
pkInfo = ((PEMKeyPair) pemObject).getPrivateKeyInfo();
}
return converter.getPrivateKey(pkInfo);
}
}
// private boolean isPEM(byte[] content) {
// String contentStr = new String(content);
// return contentStr.contains("-----BEGIN") && contentStr.contains("-----END");
// }
private Certificate getCertificateFromPEM(byte[] pemBytes)
throws IOException, CertificateException {
try (ByteArrayInputStream bis = new ByteArrayInputStream(pemBytes)) {
return CertificateFactory.getInstance("X.509").generateCertificate(bis);
}
}
}