Java PKCS#7加密
使用java加密、签名、解密和验证签名需要遵循哪些步骤。 使用PKCS#7算法,Java PKCS#7加密,java,encryption,cryptography,pkcs#7,Java,Encryption,Cryptography,Pkcs#7,使用java加密、签名、解密和验证签名需要遵循哪些步骤。 使用PKCS#7算法, java密钥存储的用途是什么?关于PKCS#7.步骤1使用keytool实用程序生成密钥。你会找到很好的教程 步骤2加载密钥库 import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.security.GeneralSecurity
java密钥存储的用途是什么?关于PKCS#7.步骤1使用keytool实用程序生成密钥。你会找到很好的教程 步骤2加载密钥库
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.SystemUtils;
public class MyKeystoreProvider {
public KeyStore getKeystore(char[] password) throws GeneralSecurityException, IOException {
KeyStore keystore = KeyStore.getInstance("jks");
InputStream input = new FileInputStream(SystemUtils.USER_HOME + File.separator + ".keystore");
try {
keystore.load(input, password);
} catch (IOException e) {
} finally {
IOUtils.closeQuietly(input);
}
return keystore;
}
}
第3步下一步,假设您希望有一些代码对某些内容进行签名。假设您的内容是一组ASCII文本,可以表示为字节数组。因此,您将使用一些Bouncy Castle类来生成“CMS签名数据”:
public byte[] sign(byte[] data) throws
GeneralSecurityException, CMSException, IOException {
Security.addProvider(new BouncyCastleProvider());
CMSSignedDataGenerator generator = new CMSSignedDataGenerator();
generator.addSigner(getPrivateKey(), (X509Certificate) getCertificate(),
CMSSignedDataGenerator.DIGEST_SHA1);
generator.addCertificatesAndCRLs(getCertStore());
CMSProcessable content = new CMSProcessableByteArray(data);
CMSSignedData signedData = generator.generate(content, true, "BC");
return signedData.getEncoded();
}
private CertStore getCertStore() throws GeneralSecurityException {
ArrayList<Certificate> list = new ArrayList<Certificate>();
Certificate[] certificates = getKeystore().getCertificateChain(this.alias);
for (int i = 0, length = certificates == null ? 0 : certificates.length; i < length; i++) {
list.add(certificates[i]);
}
return CertStore.getInstance("Collection", new CollectionCertStoreParameters(list), "BC");
}
private PrivateKey getPrivateKey() throws GeneralSecurityException {
if (this.privateKey == null) {
this.privateKey = initalizePrivateKey();
}
return this.privateKey;
}
private PrivateKey initalizePrivateKey() throws GeneralSecurityException {
KeyStore keystore = new MyKeystoreProvider().getKeystore();
return (PrivateKey) keystore.getKey(this.alias, getPasswordAsCharArray());
}
public byte[]符号(byte[]数据)抛出
GeneralSecurityException、CMSExException、IOException{
addProvider(新的BouncyCastleProvider());
CMSSignedDataGenerator生成器=新的CMSSignedDataGenerator();
generator.addSigner(getPrivateKey(),(X509Certificate)getCertificate(),
CMSSignedDataGenerator.DIGEST_SHA1);
generator.addCertificatesAndCRLs(getCertStore());
CMS可处理内容=新的CMS可处理字节数组(数据);
CMSSignedData signedData=generator.generate(content,true,“BC”);
返回signedData.getEncoded();
}
私有CertStore getCertStore()引发GeneralSecurityException{
ArrayList=新建ArrayList();
证书[]证书=getKeystore().getCertificateChain(this.alias);
for(int i=0,length=certificates==null?0:certificates.length;i
现在终于得到了原始的康坦特斯
CMSSignedData s = new CMSSignedData(signedBytes);
CertStore certs = s.getCertificatesAndCRLs("Collection", "BC");
SignerInformationStore signers = s.getSignerInfos();
boolean verified = false;
for (Iterator i = signers.getSigners().iterator(); i.hasNext(); ) {
SignerInformation signer = (SignerInformation) i.next();
Collection<? extends Certificate> certCollection = certs.getCertificates(signer.getSID());
if (!certCollection.isEmpty()) {
X509Certificate cert = (X509Certificate) certCollection.iterator().next();
if (signer.verify(cert.getPublicKey(), "BC")) {
verified = true;
}
}
}
CMSProcessable signedContent = s.getSignedContent() ;
byte[] originalContent = (byte[]) signedContent.getContent();
CMSSignedData s=新的CMSSignedData(signedBytes);
CertStore certs=s.getCertificatesAndCRLs(“集合”、“BC”);
signerinformationstoresigners=s.getSignerInfos();
布尔验证=假;
for(迭代器i=signers.getSigners().Iterator();i.hasNext();){
SignerInformation signer=(SignerInformation)i.next();
收集步骤1使用keytool实用程序生成密钥。您将找到很好的教程
步骤2加载密钥库
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.SystemUtils;
public class MyKeystoreProvider {
public KeyStore getKeystore(char[] password) throws GeneralSecurityException, IOException {
KeyStore keystore = KeyStore.getInstance("jks");
InputStream input = new FileInputStream(SystemUtils.USER_HOME + File.separator + ".keystore");
try {
keystore.load(input, password);
} catch (IOException e) {
} finally {
IOUtils.closeQuietly(input);
}
return keystore;
}
}
第3步接下来,假设您想要一些代码对某些内容进行签名。假设您的内容是一组ASCII文本,可以表示为字节数组。因此,您将使用一些Bouncy Castle类生成“CMS签名数据”:
public byte[] sign(byte[] data) throws
GeneralSecurityException, CMSException, IOException {
Security.addProvider(new BouncyCastleProvider());
CMSSignedDataGenerator generator = new CMSSignedDataGenerator();
generator.addSigner(getPrivateKey(), (X509Certificate) getCertificate(),
CMSSignedDataGenerator.DIGEST_SHA1);
generator.addCertificatesAndCRLs(getCertStore());
CMSProcessable content = new CMSProcessableByteArray(data);
CMSSignedData signedData = generator.generate(content, true, "BC");
return signedData.getEncoded();
}
private CertStore getCertStore() throws GeneralSecurityException {
ArrayList<Certificate> list = new ArrayList<Certificate>();
Certificate[] certificates = getKeystore().getCertificateChain(this.alias);
for (int i = 0, length = certificates == null ? 0 : certificates.length; i < length; i++) {
list.add(certificates[i]);
}
return CertStore.getInstance("Collection", new CollectionCertStoreParameters(list), "BC");
}
private PrivateKey getPrivateKey() throws GeneralSecurityException {
if (this.privateKey == null) {
this.privateKey = initalizePrivateKey();
}
return this.privateKey;
}
private PrivateKey initalizePrivateKey() throws GeneralSecurityException {
KeyStore keystore = new MyKeystoreProvider().getKeystore();
return (PrivateKey) keystore.getKey(this.alias, getPasswordAsCharArray());
}
public byte[]符号(byte[]数据)抛出
GeneralSecurityException、CMSExException、IOException{
addProvider(新的BouncyCastleProvider());
CMSSignedDataGenerator生成器=新的CMSSignedDataGenerator();
generator.addSigner(getPrivateKey(),(X509Certificate)getCertificate(),
CMSSignedDataGenerator.DIGEST_SHA1);
generator.addCertificatesAndCRLs(getCertStore());
CMS可处理内容=新的CMS可处理字节数组(数据);
CMSSignedData signedData=generator.generate(content,true,“BC”);
返回signedData.getEncoded();
}
私有CertStore getCertStore()引发GeneralSecurityException{
ArrayList=新建ArrayList();
证书[]证书=getKeystore().getCertificateChain(this.alias);
for(int i=0,length=certificates==null?0:certificates.length;i
现在终于得到了原始的康坦特斯
CMSSignedData s = new CMSSignedData(signedBytes);
CertStore certs = s.getCertificatesAndCRLs("Collection", "BC");
SignerInformationStore signers = s.getSignerInfos();
boolean verified = false;
for (Iterator i = signers.getSigners().iterator(); i.hasNext(); ) {
SignerInformation signer = (SignerInformation) i.next();
Collection<? extends Certificate> certCollection = certs.getCertificates(signer.getSID());
if (!certCollection.isEmpty()) {
X509Certificate cert = (X509Certificate) certCollection.iterator().next();
if (signer.verify(cert.getPublicKey(), "BC")) {
verified = true;
}
}
}
CMSProcessable signedContent = s.getSignedContent() ;
byte[] originalContent = (byte[]) signedContent.getContent();
CMSSignedData s=新的CMSSignedData(signedBytes);
CertStore certs=s.getCertificatesAndCRLs(“集合”、“BC”);
signerinformationstoresigners=s.getSignerInfos();
布尔验证=假;
for(迭代器i=signers.getSigners().Iterator();i.hasNext();){
SignerInformation signer=(SignerInformation)i.next();
收集感谢步骤3中的Vipulgenerator.addSigner(getPrivateKey(),(X509Certificate)getCertificate(),CMSSignedDataGenerator.DIGEST_SHA1);
什么是getCertificate()它是如何工作的?如果你可以参考bouncycastle PKCS。他们有很好的文档。我有一个关于P7的简单问题:pkcs7是否用于未加密的消息?我的意思是,有可能不加密就将简单消息转换为pkcs7格式吗?谢谢步骤3中的Vipulgenerator.addSigner(getPrivateKey(),(X509Certificate)getCertificate(),cmssignedatagenerator.DIGEST_SHA1);
什么是getCertificate()它是如何工作的?如果你可以参考bouncycastle PKCS。他们有很好的文档。我有一个关于P7的简单问题:pkcs7是否用于未加密的消息?我的意思是,是否可以在不加密的情况下将简单消息转换为pkcs7格式?