String to PublicKey Header is too long

Question

I'm trying to create public key from string in this way:

byte[] keyBytes = Base64.decode(publicKeyStr.getBytes("utf-8"), Base64.DEFAULT);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
X509EncodedKeySpec spec = new X509EncodedKeySpec(keyBytes);
PublicKey publicKey = keyFactory.generatePublic(spec);

but

keyFactory.generatePublic(spec);

causes error:

java.security.spec.InvalidKeySpecException: java.lang.RuntimeException: error:0D07207B:asn1 encoding routines:ASN1_get_object:header too long

Any other solutions and examples of creating PublicKey form String ?

The String is:

87Avu4YRFh25mG/5/vW7tFXORD3WYqByKZDHpcqstXKDyLYFtm8arbwXDUxcDRSJUKdZx07L1fGvExfslShssJ22nHA4bScQ7yhgrtsxNUa5NPPP/YlR9DLAnjFzf3AEbW26fLO5luQtDIDmjSvwNE6ZwAIjhRJ3HXpqw2hFMvc=AQAB

Are you sure that UTF-8 is the correct charset in which to get the bytes? — Andy Turner, Dec 15 '15 at 21:19
Ciphertext and keys should both consist of random bytes. Neither one of them can be represented 1:1 with a string. https://stackoverflow.com/questions/26867840/java-security-spec-invalidkeyspecexception-and-inappropriate-key-specification-e — Michael Queue, Dec 15 '15 at 22:17

score 0 · Answer 1 · edited May 23 '17 at 11:44

0

I've found solution here RSA. Java Encryption .NET Decryption

The problem was that my string was Modulus + Exponential in one string. When i split it to two diferent Strings and generate like there. The key was generated successfuly. Also there was a problem with encoding UTF-16LE.

edited May 23 '17 at 11:44

Community

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answered Dec 17 '15 at 21:22

Ferdezo

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String to PublicKey Header is too long

1 Answers1