java读取DER格式的私钥
我有以下代码来读取 PKCS#8 格式的私钥
public void encryptHash(String hashToEncrypt, String pathOfKey, String Algorithm) {
FileInputStream fis = null;
byte[] encodedKey = null;
try {
File f = new File(pathOfKey);
encodedKey = new byte[(int)f.length()];
fis = new FileInputStream(f);
fis.read(encodedKey);
fis.close();
KeyFactory kf = KeyFactory.getInstance("RSA");
PrivateKey privateKey = kf.generatePrivate(new PKCS8EncodedKeySpec(encodedKey));
Signature rsaSigner = Signature.getInstance("SHA1withRSA");
rsaSigner.initSign(privateKey);
fis = new FileInputStream(hashToEncrypt);
BufferedInputStream bis = new BufferedInputStream(fis);
byte[] buffer = new byte[1024];
int len = 0;
while ((len = bis.read(buffer)) >= 0) {
try {
rsaSigner.update(buffer, 0, len);
} catch (SignatureException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
}
}
bis.close();
byte[] signature = rsaSigner.sign();
System.out.println(new String(signature));
} catch (SignatureException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (InvalidKeyException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (InvalidKeySpecException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (FileNotFoundException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (NoSuchAlgorithmException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} finally {
try {
fis.close();
} catch (IOException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
,但出现以下异常。
dic 09, 2011 1:59:59 PM firmaelectronica.DataEncryptor encryptHash
Grave: null
java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException : DER input, Integer tag error
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:217)
at java.security.KeyFactory.generatePrivate(KeyFactory.java:372)
at firmaelectronica.DataEncryptor.encryptHash(DataEncryptor.java:40)
at firmaelectronica.FirmaElectronica.main(FirmaElectronica.java:39)
Caused by: java.security.InvalidKeyException: IOException : DER input, Integer tag error
at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:361)
at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:367)
at sun.security.rsa.RSAPrivateCrtKeyImpl.<init>(RSAPrivateCrtKeyImpl.java:91)
at sun.security.rsa.RSAPrivateCrtKeyImpl.newKey(RSAPrivateCrtKeyImpl.java:75)
at sun.security.rsa.RSAKeyFactory.generatePrivate(RSAKeyFactory.java:316)
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:213)
... 3 more
知道出了什么问题吗?我在 OpenSSL openssl pkcs8 -inform DER -in aaa010101aaa_FIEL.key -out aaa010101aaa_FIEL_key.pem
上尝试过,它有效,但是当我想以 DER 格式读取密钥时,它只是发送该异常。
I have the following code to read a private key in PKCS#8 format
public void encryptHash(String hashToEncrypt, String pathOfKey, String Algorithm) {
FileInputStream fis = null;
byte[] encodedKey = null;
try {
File f = new File(pathOfKey);
encodedKey = new byte[(int)f.length()];
fis = new FileInputStream(f);
fis.read(encodedKey);
fis.close();
KeyFactory kf = KeyFactory.getInstance("RSA");
PrivateKey privateKey = kf.generatePrivate(new PKCS8EncodedKeySpec(encodedKey));
Signature rsaSigner = Signature.getInstance("SHA1withRSA");
rsaSigner.initSign(privateKey);
fis = new FileInputStream(hashToEncrypt);
BufferedInputStream bis = new BufferedInputStream(fis);
byte[] buffer = new byte[1024];
int len = 0;
while ((len = bis.read(buffer)) >= 0) {
try {
rsaSigner.update(buffer, 0, len);
} catch (SignatureException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
}
}
bis.close();
byte[] signature = rsaSigner.sign();
System.out.println(new String(signature));
} catch (SignatureException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (InvalidKeyException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (InvalidKeySpecException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (FileNotFoundException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} catch (NoSuchAlgorithmException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
} finally {
try {
fis.close();
} catch (IOException ex) {
Logger.getLogger(DataEncryptor.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
But I'm getting the following exception.
dic 09, 2011 1:59:59 PM firmaelectronica.DataEncryptor encryptHash
Grave: null
java.security.spec.InvalidKeySpecException: java.security.InvalidKeyException: IOException : DER input, Integer tag error
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:217)
at java.security.KeyFactory.generatePrivate(KeyFactory.java:372)
at firmaelectronica.DataEncryptor.encryptHash(DataEncryptor.java:40)
at firmaelectronica.FirmaElectronica.main(FirmaElectronica.java:39)
Caused by: java.security.InvalidKeyException: IOException : DER input, Integer tag error
at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:361)
at sun.security.pkcs.PKCS8Key.decode(PKCS8Key.java:367)
at sun.security.rsa.RSAPrivateCrtKeyImpl.<init>(RSAPrivateCrtKeyImpl.java:91)
at sun.security.rsa.RSAPrivateCrtKeyImpl.newKey(RSAPrivateCrtKeyImpl.java:75)
at sun.security.rsa.RSAKeyFactory.generatePrivate(RSAKeyFactory.java:316)
at sun.security.rsa.RSAKeyFactory.engineGeneratePrivate(RSAKeyFactory.java:213)
... 3 more
any idea what is wrong? I tried this on OpenSSL openssl pkcs8 -inform DER -in aaa010101aaa_FIEL.key -out aaa010101aaa_FIEL_key.pem
and it works but when I want to read the key in DER format it just sends that exception.
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终于看到了这个线程 Encrypting with RSA private key in Java< /a> 找到了答案。
首先,我必须取消对密钥的保护,如下所示
openssl pkcs8 -inform DER -in myDERPassProtectedPrivate.key -outform PEM -out myPEMPrivate.key
它要求我输入密码,然后我得到了文件 myPEMPrivate.key 完成后,继续删除保护密钥的密码,如下所示
openssl pkcs8 -topk8 -nocrypt -in myPEMPrivate.key -outform DER -out myNotAnyMoreProtectedPrivate.key
有了这个,我现在可以使用上面的代码加载密钥。如果我们想在 java 中拥有受密码保护的密钥,强烈建议使用密钥库。
PS我试图避免使用
openssl pkcs8 -topk8 -nocrypt -inform der -in myDERPassProtectedPrivate.key -outform der -out myDERNoPassProtectedPrivate.key
摆脱保护密钥的密码的两个步骤,但我不这样做不知道为什么我遇到错误 解密密钥时出错 我使用了 WinOpenSSL 也许这就是我收到该错误的原因。Well finally looking at this thread Encrypting with RSA private key in Java found the answer.
First I had to unprotect the key, as follows
openssl pkcs8 -inform DER -in myDERPassProtectedPrivate.key -outform PEM -out myPEMPrivate.key
it asked me for my password and then I had the file myPEMPrivate.key Once done this proceed to get rid of the password protecting the key like follows
openssl pkcs8 -topk8 -nocrypt -in myPEMPrivate.key -outform DER -out myNotAnyMoreProtectedPrivate.key
with this I'm now able to load the key with the code above. If we want to have a pass-protected key in java it is highly advisable to use a keystore.
P.S. I tried to avoid the 2 steps to get rid of the password protecting the key with
openssl pkcs8 -topk8 -nocrypt -inform der -in myDERPassProtectedPrivate.key -outform der -out myDERNoPassProtectedPrivate.key
but I don't know why I had the error Error decrypting key I used WinOpenSSL maybe that's the reason why I got that error.使用这个:
命令应如下所示:
OpenSSL 网站 https://www.openssl.org/docs/apps/pkcs8.html
Use this:
Command should look like:
OpenSSL website https://www.openssl.org/docs/apps/pkcs8.html