我一直在尝试获取一些用于加密 Paypal 按钮的有效 Java 代码。这不是一件容易的事!即使我从 Paypal 获得一些代码，我也会遇到错误..ugh..
这就是我目前所拥有的，我认为最终会奏效的。
我从 Paypal 的网站下载了 Java.zip 文件。其中有两个类 - ClientSide.java 和 ButtonEncryption.java
问题 - 我收到 InvalidKeyException : Illegal key size 错误。
问题
1)我该如何解决这个问题？ 2) 哪行代码抛出错误？
C:\jakarta-tomcat\webapps\PlanB\WEB-INF\classes>java palmb.servlets.paypal.ButtonEncryption
java.io.IOException: exception decrypting data - java.security.InvalidKeyException: Illegal key size
at org.bouncycastle.jce.provider.JDKPKCS12KeyStore.cryptData(Unknown Source)
at org.bouncycastle.jce.provider.JDKPKCS12KeyStore.engineLoad(Unknown Source)
at java.security.KeyStore.load(Unknown Source)
at palmb.servlets.paypal.ClientSide.getButtonEncryptionValue(ClientSide.java:63)
at palmb.servlets.paypal.ButtonEncryption.main(ButtonEncryption.java:81)
package palmb.servlets.paypal;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.security.InvalidAlgorithmParameterException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.PrivateKey;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertStore;
import java.security.cert.CertStoreException;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.CollectionCertStoreParameters;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Enumeration;
import org.bouncycastle.cms.CMSEnvelopedData;
import org.bouncycastle.cms.CMSEnvelopedDataGenerator;
import org.bouncycastle.cms.CMSException;
import org.bouncycastle.cms.CMSProcessableByteArray;
import org.bouncycastle.cms.CMSSignedData;
import org.bouncycastle.cms.CMSSignedDataGenerator;
import org.bouncycastle.openssl.PEMReader;
import org.bouncycastle.util.encoders.Base64;
/**
*/
public class ClientSide
{
private String keyPath;
private String certPath;
private String paypalCertPath;
private String keyPass;
public ClientSide( String keyPath, String certPath, String paypalCertPath, String keyPass )
{
this.keyPath = keyPath;
this.certPath = certPath;
this.paypalCertPath = paypalCertPath;
this.keyPass = keyPass;
}
public String getButtonEncryptionValue(String _data, String _privateKeyPath, String _certPath, String _payPalCertPath,
String _keyPass) throws IOException,CertificateException,KeyStoreException,
UnrecoverableKeyException,InvalidAlgorithmParameterException,NoSuchAlgorithmException,
NoSuchProviderException,CertStoreException,CMSException {
_data = _data.replace(',', '\n');
CertificateFactory cf = CertificateFactory.getInstance("X509", "BC");
// Read the Private Key
KeyStore ks = KeyStore.getInstance("PKCS12", "BC");
ks.load( new FileInputStream(_privateKeyPath), _keyPass.toCharArray() );
String keyAlias = null;
Enumeration aliases = ks.aliases();
while (aliases.hasMoreElements()) {
keyAlias = (String) aliases.nextElement();
}
PrivateKey privateKey = (PrivateKey) ks.getKey( keyAlias, _keyPass.toCharArray() );
// Read the Certificate
X509Certificate certificate = (X509Certificate) cf.generateCertificate( new FileInputStream(_certPath) );
// Read the PayPal Cert
X509Certificate payPalCert = (X509Certificate) cf.generateCertificate( new FileInputStream(_payPalCertPath) );
// Create the Data
byte[] data = _data.getBytes();
// Sign the Data with my signing only key pair
CMSSignedDataGenerator signedGenerator = new CMSSignedDataGenerator();
signedGenerator.addSigner( privateKey, certificate, CMSSignedDataGenerator.DIGEST_SHA1 );
ArrayList certList = new ArrayList();
certList.add(certificate);
CertStore certStore = CertStore.getInstance( "Collection", new CollectionCertStoreParameters(certList) );
signedGenerator.addCertificatesAndCRLs(certStore);
CMSProcessableByteArray cmsByteArray = new CMSProcessableByteArray(data);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
cmsByteArray.write(baos);
System.out.println( "CMSProcessableByteArray contains [" + baos.toString() + "]" );
CMSSignedData signedData = signedGenerator.generate(cmsByteArray, true, "BC");
byte[] signed = signedData.getEncoded();
CMSEnvelopedDataGenerator envGenerator = new CMSEnvelopedDataGenerator();
envGenerator.addKeyTransRecipient(payPalCert);
CMSEnvelopedData envData = envGenerator.generate( new CMSProcessableByteArray(signed),
CMSEnvelopedDataGenerator.DES_EDE3_CBC, "BC" );
byte[] pkcs7Bytes = envData.getEncoded();
return new String( DERtoPEM(pkcs7Bytes, "PKCS7") );
}
public static byte[] DERtoPEM(byte[] bytes, String headfoot)
{
ByteArrayOutputStream pemStream = new ByteArrayOutputStream();
PrintWriter writer = new PrintWriter(pemStream);
byte[] stringBytes = Base64.encode(bytes);
System.out.println("Converting " + stringBytes.length + " bytes");
String encoded = new String(stringBytes);
if (headfoot != null) {
writer.print("-----BEGIN " + headfoot + "-----\n");
}
// write 64 chars per line till done
int i = 0;
while ((i + 1) * 64 < encoded.length()) {
writer.print(encoded.substring(i * 64, (i + 1) * 64));
writer.print("\n");
i++;
}
if (encoded.length() % 64 != 0) {
writer.print(encoded.substring(i * 64)); // write remainder
writer.print("\n");
}
if (headfoot != null) {
writer.print("-----END " + headfoot + "-----\n");
}
writer.flush();
return pemStream.toByteArray();
}
}
package palmb.servlets.paypal;
//import com.paypal.crypto.sample.*;
import palmb.servlets.paypal.ClientSide;
import java.io.*;
import java.security.InvalidAlgorithmParameterException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.Security;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertStoreException;
import java.security.cert.CertificateException;
import org.bouncycastle.cms.CMSException;
/**
*/
public class ButtonEncryption {
//path to public cert
private static String certPath = "C:/jakarta-tomcat/webapps/PlanB/Certs/public-cert.pem";
//path to private key in PKCS12 format
private static String keyPath = "C:/jakarta-tomcat/webapps/PlanB/Certs/my_pkcs12.p12";
//path to Paypal's public cert
private static String paypalCertPath = "C:/jakarta-tomcat/webapps/PlanB/Certs/paypal_cert_pem.txt";
//private key password
private static String keyPass = "password"; //will be replaced with actual password when compiled and executed
//the button command, properties/parameters
private static String cmdText = "cmd=_xclick\nbusiness=buyer@hotmail.com\nitem_name=vase\nitemprice=25.00"; //cmd=_xclick,business=sample@paypal.com,amount=1.00,currency_code=USD
//output file for form code
private static String output = "test.html";
public static void main(String[] args)
{
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
String stage = "sandbox";
try
{
ClientSide client_side = new ClientSide( keyPath, certPath, paypalCertPath, keyPass );
String result = client_side.getButtonEncryptionValue( cmdText, keyPath, certPath, paypalCertPath, keyPass );
File outputFile = new File( output );
if ( outputFile.exists() )
outputFile.delete();
if ( result != null && result != "")
{
try {
OutputStream fout= new FileOutputStream( output );
OutputStream bout= new BufferedOutputStream(fout);
OutputStreamWriter out = new OutputStreamWriter(bout, "US-ASCII");
out.write( "<form action=\"https://www." );
out.write( stage );
out.write( "paypal.com/cgi-bin/webscr\" method=\"post\">" );
out.write( "<input type=\"hidden\" name=\"cmd\" value=\"_s-xclick\">" ); ;
out.write( "<input type=\"image\" src=\"https://www." );
out.write( stage );
out.write( "paypal.com/en_US/i/btn/x-click-but23.gif\" border=\"0\" name=\"submit\" " );
out.write( "alt=\"Make payments with PayPal - it's fast, free and secure!\">" );
out.write( "<input type=\"hidden\" name=\"encrypted\" value=\"" );
out.write( result );
out.write( "\">" );
out.write( "</form>");
out.flush(); // Don't forget to flush!
out.close();
}
catch (UnsupportedEncodingException e) {
System.out.println(
"This VM does not support the ASCII character set."
);
}
catch (IOException e) {
System.out.println(e.getMessage());
}
}
}
catch (NoSuchAlgorithmException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (NoSuchProviderException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (CMSException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (CertificateException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (KeyStoreException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (UnrecoverableKeyException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (InvalidAlgorithmParameterException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (CertStoreException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
我通过以下命令使用 OpenSSL 生成了私钥和公共(public)证书。
私钥
openssl genrsa -out private-key.pem 1024
公共(public)证书
openssl req -new -key private-key.pem -x509 -days 1095 -out public-cert.pem
创建 PKCS12 文件
openssl pkcs12 -export -in public-cert.pem -inkey private-key.pem -out my_pkcs12.p12
此外，我必须从 Paypal 网站下载 Paypal 公共(public)证书。
C:\jakarta-tomcat\webapps\PlanB\WEB-INF\classes>javac .\palmb\servlets\paypal\ClientSide.java -Xlint
.\palmb\servlets\paypal\ClientSide.java:85: warning: [deprecation] addSigner(java.security.PrivateKey,java.security.cert.X509Certificate,java.lang.String) in org.bouncycastle.cms.CMSSignedDataGenerator has been deprecated
signedGenerator.addSigner( privateKey, certificate, CMSSignedDat
aGenerator.DIGEST_SHA1 );
^
.\palmb\servlets\paypal\ClientSide.java:88: warning: [unchecked] unchecked call
to add(E) as a member of the raw type java.util.ArrayList
certList.add(certificate);
^
.\palmb\servlets\paypal\ClientSide.java:90: warning: [deprecation] addCertificatesAndCRLs(java.security.cert.CertStore) in org.bouncycastle.cms.CMSSignedGenerat
or has been deprecated
signedGenerator.addCertificatesAndCRLs(certStore);
^
.\palmb\servlets\paypal\ClientSide.java:97: warning: [deprecation] generate(org.
bouncycastle.cms.CMSProcessable,boolean,java.lang.String) in org.bouncycastle.cm
s.CMSSignedDataGenerator has been deprecated
CMSSignedData signedData = signedGenerator.generate(cmsByteArray, true, "BC");
^
.\palmb\servlets\paypal\ClientSide.java:102: warning: [deprecation] addKeyTransR
ecipient(java.security.cert.X509Certificate) in org.bouncycastle.cms.CMSEnvelope
dGenerator has been deprecated
envGenerator.addKeyTransRecipient(payPalCert);
^
.\palmb\servlets\paypal\ClientSide.java:103: warning: [deprecation] generate(org.bouncycastle.cms.CMSProcessable,java.lang.String,java.lang.String) in org.bouncycastle.cms.CMSEnvelopedDataGenerator has been deprecated
CMSEnvelopedData envData = envGenerator.generate( new CMSProcess
ableByteArray(signed),
^
6 warnings
这些是我安装 JCE Unlimited Strength Policy 文件的步骤:
1) 前往Java JCE Download甲骨文上的页面。
2) 从 zip 中提取文件。
3) 将 local_policy.jar 和 US_export_policy.jar 文件放在 C:\Java\jdk1.6.0_22\jre\lib\security 文件夹中。
注意:C:\Java\jdk1.6.0_22 设置为 %JAVA_HOME%
4) 更新了系统类路径以包含 jar 的位置。
注意: JDK 1.6 附带的安全文件夹中还有其他文件，包括:java.policy、java.security、javaws.policy、trusted.libraries - 但这些可能与 JCE 文件无关，对吧？
我在 http://www.bouncycastle.org/specifications.html#install 访问了 Bouncy CaSTLe 页面
向下滚动到5.0 Bouncy CaSTLe Provider，然后阅读5.1 Example下的信息。它提到将 Bouncy CaSTLe Provider 的参数添加到 java.security 文件。我的文件在 C:\Java\jdk1.6.0_22\jre\lib\security 下。
我在我的文件中添加了以下行 - security.provider.10=org.bouncycaSTLe.jce.provider.BouncyCaSTLeProvider
此外，我发现我没有将 Bouncy CaSTLe jar 添加到类路径中，所以我继续这样做了。
现在，在进行这些更改、重新编译并尝试执行 ClientSide.java 之后，我得到了同样的异常:但也许重点应该放在异常的部分，它说明了 bouncycaSTLe提供者 -
at org.bouncycastle.jce.provider.JDKPKCS12KeyStore.cryptData(Unknown Source)
at org.bouncycastle.jce.provider.JDKPKCS12KeyStore.engineLoad(Unknown Source)
@PeteyB - 我确定我正确安装了策略文件。根据我在这里所说的，您还有什么可以建议我尝试的吗？你能看看 Bouncy CaSTLe 网站@http://www.bouncycastle.org/specifications.html#install看看有没有我遗漏的东西？
最佳答案
所以问题一定出在您的 JCE Unlimited Strength 安装上。
确保在 JDK 的 jdk1.6.0_25\jre\lib\security\ 中都覆盖了 local_policy.jar 和 US_export_policy.jar > 在您的 JRE 的 lib\security\ 文件夹中。
在我的情况下，我会将新的 .jars 放入:
C:\Program Files\Java\jdk1.6.0_25\jre\lib\security
和
C:\Program Files\Java\jre6\lib\security
如果您正在运行 Java 8 并遇到此问题。以下步骤应该会有所帮助!
转到您的 JRE 安装(例如 - jre1.8.0_181\lib\security\policy\unlimited)复制 local_policy.jar 并将其替换为 JDK 安装目录中的“local_policy.jar”(例如 - jdk1.8.0_141\jre\lib\security)。
关于java - 无效 key 异常 : Illegal Key Size - Java code throwing exception for encryption class - how to fix?，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6363801/