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.
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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This code example shows how to use the following methods:
RSAPublicKey rsaKey = (RSAPublicKey) key; if (RSAPublicKeySpec.class.equals(keySpec)) { BigInteger modulus = rsaKey.getModulus(); BigInteger publicExponent = rsaKey.getPublicExponent(); return (T) new RSAPublicKeySpec(modulus, publicExponent); } else if (X509EncodedKeySpec.class.equals(keySpec)) { return (T) new X509EncodedKeySpec(key.getEncoded()); } else { throw new InvalidKeySpecException("Must be RSAPublicKeySpec or X509EncodedKeySpec"); } } else if (key instanceof RSAPrivateCrtKey) { RSAPrivateCrtKey rsaKey = (RSAPrivateCrtKey) key; if (RSAPrivateKeySpec.class.equals(keySpec)) { BigInteger modulus = rsaKey.getModulus(); BigInteger privateExponent = rsaKey.getPrivateExponent(); return (T) new RSAPrivateKeySpec(modulus, privateExponent); } else if (RSAPrivateCrtKeySpec.class.equals(keySpec)) { BigInteger modulus = rsaKey.getModulus();Full Snippet Info
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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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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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This code example shows how to use the following methods: getModulus, getPublicExponent
if (spec.isAssignableFrom(RSAPublicKeySpec.class) && key instanceof RSAPublicKey) { RSAPublicKey k = (RSAPublicKey)key; return new RSAPublicKeySpec(k.getModulus(), k.getPublicExponent()); } else if (spec.isAssignableFrom(RSAPrivateKeySpec.class) && key instanceof java.security.interfaces.RSAPrivateKey) { java.security.interfaces.RSAPrivateKey k = (java.security.interfaces.RSAPrivateKey)key; return new RSAPrivateKeySpec(k.getModulus(), k.getPrivateExponent()); } else if (spec.isAssignableFrom(RSAPrivateCrtKeySpec.class) && key instanceof RSAPrivateCrtKey) { RSAPrivateCrtKey k = (RSAPrivateCrtKey)key; return new RSAPrivateCrtKeySpec( k.getModulus(), k.getPublicExponent(), k.getPrivateExponent(), k.getPrimeP(), k.getPrimeQ(),Full Snippet Info
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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);Full Snippet Info
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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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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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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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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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Related Java 8 RSAPublicKeySpec Questions & Answers:
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);
dum4ll3's full answer:
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.
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);
Alex's full answer:
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();
}
}
See Code Examples for Java 8 RSAPublicKeySpec Methods:
- getModulus(20)Returns the modulus.
- getPublicExponent(20)Returns the public exponent.
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