java.security.spec
RSAPublicKeySpec

Java 8 RSAPublicKeySpec - top ranked examples from Open Source projects

These code examples were ranked by Codota’s semantic indexing as the best open source examples for Java 8 RSAPublicKeySpec class.

githubCode example from Github project robovm/robovm, JDKKeyFactory.java »
This code example shows how to use the following methods:getModulus, getPublicExponent
import org.bouncycastle.asn1.ASN1Sequence; 
import org.bouncycastle.asn1.DERObjectIdentifier; 
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers; 
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers; 
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers; 
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo; 
import org.bouncycastle.asn1.pkcs.RSAPrivateKeyStructure; 
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo; 
import org.bouncycastle.asn1.x9.X9ObjectIdentifiers; 
// BEGIN android-removed 
// import org.bouncycastle.jce.interfaces.ElGamalPrivateKey; 
// import org.bouncycastle.jce.interfaces.ElGamalPublicKey; 
// import org.bouncycastle.jce.spec.ElGamalPrivateKeySpec; 
// import org.bouncycastle.jce.spec.ElGamalPublicKeySpec; 
// import org.bouncycastle.jce.spec.GOST3410PrivateKeySpec; 
// import org.bouncycastle.jce.spec.GOST3410PublicKeySpec; 
// END android-removed 
 
public abstract class JDKKeyFactory 
    extends KeyFactorySpi
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githubCode example from Github project robovm/robovm, OpenSSLRSAKeyFactory.java »
This code example shows how to use the following methods:
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githubCode example from Github project jclouds/jclouds, SshKeys.java »
This code example shows how to use the following methods:getModulus, getPublicExponent
 
   /** 
    * @return true if the keypairs match 
    */ 
   public static boolean privateKeyMatchesPublicKey(RSAPrivateCrtKeySpec privateKey, RSAPublicKeySpec publicKey) {
      return privateKey.getPublicExponent().equals(publicKey.getPublicExponent())
               && privateKey.getModulus().equals(publicKey.getModulus());
   } 
 
   /** 
    * @return true if the keypair has the same fingerprint as supplied 
    */ 
   public static boolean privateKeyHasFingerprint(RSAPrivateCrtKeySpec privateKey, String fingerprint) {
      return fingerprint(privateKey.getPublicExponent(), privateKey.getModulus()).equals(fingerprint);
   } 
 
   /** 
    * @param privateKeyPEM 
    *           RSA private key in PEM format 
    * @param fingerprint 
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githubCode example from Github project bcgit/bc-java, JCERSAPublicKey.java »
This code example shows how to use the following methods:getModulus, getPublicExponent
    } 
 
    JCERSAPublicKey( 
        RSAPublicKeySpec spec)
    { 
        this.modulus = spec.getModulus();
        this.publicExponent = spec.getPublicExponent();
    } 
 
    JCERSAPublicKey( 
        RSAPublicKey key)
    { 
        this.modulus = key.getModulus();
        this.publicExponent = key.getPublicExponent();
    } 
 
    JCERSAPublicKey( 
        SubjectPublicKeyInfo    info)
    { 
        try 
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githubCode example from Github project bcgit/bc-java, KeyFactorySpi.java »
This code example shows how to use the following methods:getModulus, getPublicExponent
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githubCode example from Github project Akdeniz/google-play-crawler, Utils.java »
This code example shows how to use the following methods:
	int exponentLength = readInt(keyByteArray, modulusLength + 4);
	byte[] exponentByteArray = new byte[exponentLength];
	System.arraycopy(keyByteArray, modulusLength + 8, exponentByteArray, 0, exponentLength);
	BigInteger publicExponent = new BigInteger(1, exponentByteArray);
 
	return KeyFactory.getInstance("RSA").generatePublic(new RSAPublicKeySpec(modulus, publicExponent));
    } 
 
    /** 
     * Encrypts given string with Google Public Key. 
     *  
     */ 
    public static String encryptString(String str2Encrypt) throws Exception {
 
	byte[] keyByteArray = Base64.decode(GOOGLE_PUBLIC_KEY, Base64.DEFAULT);
 
	byte[] header = new byte[5];
	byte[] digest = MessageDigest.getInstance("SHA-1").digest(keyByteArray);
	header[0] = 0;
	System.arraycopy(digest, 0, header, 1, 4);
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githubCode example from Github project bcgit/bc-java, BCRSAPublicKey.java »
This code example shows how to use the following methods:getModulus, getPublicExponent
 
    BCRSAPublicKey( 
        RSAPublicKeySpec spec)
    { 
        this.algorithmIdentifier = DEFAULT_ALGORITHM_IDENTIFIER;
        this.modulus = spec.getModulus();
        this.publicExponent = spec.getPublicExponent();
    } 
 
    BCRSAPublicKey( 
        RSAPublicKey key)
    { 
        this.algorithmIdentifier = DEFAULT_ALGORITHM_IDENTIFIER;
        this.modulus = key.getModulus();
        this.publicExponent = key.getPublicExponent();
    } 
 
    BCRSAPublicKey( 
        SubjectPublicKeyInfo info)
    { 
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githubCode example from Github project CSEMike/OneSwarm, JCERSAPublicKey.java »
This code example shows how to use the following methods:getModulus, getPublicExponent
    } 
 
    JCERSAPublicKey( 
        RSAPublicKeySpec spec)
    { 
        this.modulus = spec.getModulus();
        this.publicExponent = spec.getPublicExponent();
    } 
 
    JCERSAPublicKey( 
        RSAPublicKey key)
    { 
        this.modulus = key.getModulus();
        this.publicExponent = key.getPublicExponent();
    } 
 
    JCERSAPublicKey( 
        SubjectPublicKeyInfo    info)
    { 
        try 
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githubCode example from Github project OESF/OHA-Android-4.0.4_r1.0, RSAPublicKeySpecTest.java »
This code example shows how to use the following methods:getPublicExponent
     * Test for <code>getPublicExponent()</code> method<br> 
     * Assertion: returns public exponent 
     */ 
    public final void testGetPublicExponent() { 
        RSAPublicKeySpec rpks =
            new RSAPublicKeySpec(BigInteger.valueOf(3L),
                                 BigInteger.valueOf(1234567890L));
        assertTrue(BigInteger.valueOf(1234567890L).equals(rpks.getPublicExponent()));
    } 
 
} 
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githubCode example from Github project CyanogenMod/android_libcore, RSAPublicKeySpecTest.java »
This code example shows how to use the following methods:getPublicExponent
     * Test for <code>getPublicExponent()</code> method<br> 
     * Assertion: returns public exponent 
     */ 
    public final void testGetPublicExponent() { 
        RSAPublicKeySpec rpks =
            new RSAPublicKeySpec(BigInteger.valueOf(3L),
                                 BigInteger.valueOf(1234567890L));
        assertTrue(BigInteger.valueOf(1234567890L).equals(rpks.getPublicExponent()));
    } 
 
} 
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More examples ⏬

Related Java 8 RSAPublicKeySpec Questions & Answers:

Encrypt data in Android with a RSA public.pem file generated in Ruby 
5:	        ASN1Primitive obj = in.readObject();
6:	        RSAPublicKeyStructure keyStruct = RSAPublicKeyStructure.getInstance(obj);
7:	        RSAPublicKeySpec keySpec = new RSAPublicKeySpec(keyStruct.getModulus(), keyStruct.getPublicExponent());
8:	        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
9:	        return keyFactory.generatePublic(keySpec);
-
5:	        ASN1Primitive obj = in.readObject();
6:	        RSAPublicKeyStructure keyStruct = RSAPublicKeyStructure.getInstance(obj);
7:	        RSAPublicKeySpec keySpec = new RSAPublicKeySpec(keyStruct.getModulus(), keyStruct.getPublicExponent());
8:	        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
9:	        return keyFactory.generatePublic(keySpec);

So finally, after hours of research I came with a solution and finally could get read my public key from .pem file and generate an instance of this key. Hence, I managed to encrypt the data.

But I had to copy and paste the key content without any special character like '\n' and make a publicKeyString with it

----------BEGIN RSA PUBLIC KEY---------

key content

----------END RSA PUBLIC KEY---------

static public PublicKey publicKey(String publicKeyString) {
    try {
        byte[] decodedPublicKey = Base64.decode(publicKeyString, 0);
        ASN1InputStream in = new ASN1InputStream(decodedPublicKey);
        ASN1Primitive obj = in.readObject();
        RSAPublicKeyStructure keyStruct = RSAPublicKeyStructure.getInstance(obj);
        RSAPublicKeySpec keySpec = new RSAPublicKeySpec(keyStruct.getModulus(), keyStruct.getPublicExponent());
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        return keyFactory.generatePublic(keySpec);
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (InvalidKeySpecException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;
}

I failed even when I tried to use PEMReader from bouncy castle. All the problems have something to do with keys generated in Ruby version prior 1.9.3 as described with details here.

Anyway, thanks a lot for the attention disposed.

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RSA encrypt with base64 encoded public key in Android 
8:	
9:	        KeyFactory fact = KeyFactory.getInstance("RSA");
10:	        RSAPublicKeySpec pub = fact.getKeySpec(kp.getPublic(),
11:	          RSAPublicKeySpec.class);
12:	        RSAPrivateKeySpec priv = fact.getKeySpec(kp.getPrivate(),
-
9:	        KeyFactory fact = KeyFactory.getInstance("RSA");
10:	        RSAPublicKeySpec pub = fact.getKeySpec(kp.getPublic(),
11:	          RSAPublicKeySpec.class);
12:	        RSAPrivateKeySpec priv = fact.getKeySpec(kp.getPrivate(),
13:	          RSAPrivateKeySpec.class);

this is how you can generate Public and Private key pair below is the function to store them on hard dist

enter code here
public static void GenerateKeyPair()
{       
    try{
        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
        kpg.initialize(2048);
        KeyPair kp = kpg.genKeyPair();

        KeyFactory fact = KeyFactory.getInstance("RSA");
        RSAPublicKeySpec pub = fact.getKeySpec(kp.getPublic(),
          RSAPublicKeySpec.class);
        RSAPrivateKeySpec priv = fact.getKeySpec(kp.getPrivate(),
          RSAPrivateKeySpec.class);

        saveToFile("public.key", pub.getModulus(),
                  pub.getPublicExponent());
        saveToFile("private.key", priv.getModulus(),
                  priv.getPrivateExponent());
    }catch(Exception e){
        System.out.println(e.getMessage());
    }
}

public static void saveToFile(String fileName,
  BigInteger mod, BigInteger exp) throws Exception {
  ObjectOutputStream oout = new ObjectOutputStream(
    new BufferedOutputStream(new FileOutputStream(fileName)));
  try {
    oout.writeObject(mod);
    oout.writeObject(exp);
  } catch (Exception e) {
    throw new Exception("error", e);
  } finally {
    oout.close();
  }
}

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See Code Examples for Java 8 RSAPublicKeySpec Methods:
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