cast RSAPrivateKey to PrivateKey and vice versa

Question

I've created an org.bouncycastle.asn1.pkcs.RSAPrivateKey using its static getInstance(byte[]) from a PKCS#1 formated DER bytes, now I want to cast(or change) this to PrivateKey, how to do that??

score 0 · Answer 1 · edited Dec 28 '13 at 22:54

0

You can directly create the PrivateKey from an ASN.1 encoded bytes array.

public static PrivateKey makeKey(byte[] keyBytes) {
    KeyFactory keyFactory = KeyFactory.getInstance("RSA");
    KeySpec privateKeySpec = new PKCS8EncodedKeySpec(keyBytes);
    PrivateKey privateKey = keyFactory.generatePrivate(privateKeySpec);
    return privateKey;
}

edited Dec 28 '13 at 22:54

divanov

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answered Dec 23 '13 at 06:46

Buddhima Gamlath

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1

the bytes are not PKCS8 encoded so this probably will throw invalidkeyException – monim Dec 24 '13 at 06:09
1

`RSAPrivateKey` doesn't have `getInstance(byte[])` method. http://www.bouncycastle.org/docs/docs1.5on/org/bouncycastle/asn1/pkcs/RSAPrivateKey.html#getInstance%28org.bouncycastle.asn1.ASN1TaggedObject,%20boolean%29 – divanov Dec 29 '13 at 09:47

cast RSAPrivateKey to PrivateKey and vice versa

1 Answers1