I was having this same issue, and the format of the key was NOT the actual problem. All I had to do to get rid of that exception was to call java.security.Security.addProvider( new org.bouncycastle.jce.provider.BouncyCastleProvider() ); and everything worked
Dupe: Difference between openSSL rsautl and dgst Closely related: Why are the RSA-SHA256 signatures I generate with OpenSSL and Java different? Different signatures when using C routines and openssl dgst, rsautl commands Signing 20-byte message with 256-bit RSA key working with openssl.exe but not in code Crossdupe: https://superuser.com/questions/943972/what-is-the-difference-between-openssl-pkeyutl-sign-and-openssl-rsautl-sign TLDR: dgst -sign for RSA does the … Read more
Using x5c is just one way, but you can also retrieve the public key with the parameters e (public exponent) and n (modulus), which is also documented on the jose-jwt github page: //If kid was found then load public key if (jwkkey != null) { RSACryptoServiceProvider key = new RSACryptoServiceProvider(); key.ImportParameters(new RSAParameters { Modulus = … Read more
static KeyPair demo(InputStream pub, InputStream pvt) throws IOException, GeneralSecurityException { KeyFactory f = KeyFactory.getInstance(“RSA”); RSAPublicKeySpec pubspec = decodeRSAPublicSSH(readAllBase64Bytes(pub)); RSAPrivateCrtKeySpec pvtspec = decodeRSAPrivatePKCS1(readAllBase64Bytes(pvt)); return new KeyPair(f.generatePublic(pubspec), f.generatePrivate(pvtspec)); } static RSAPublicKeySpec decodeOpenSSH(byte[] input) { String[] fields = new String(input, StandardCharsets.US_ASCII).split(” “); if ((fields.length < 2) || (!fields[0].equals(“ssh-rsa”))) throw new IllegalArgumentException(“Unsupported type”); byte[] std = Base64.getDecoder().decode(fields[1]); return decodeRSAPublicSSH(std); … Read more
One organism’s large is another’s petite, though we all know expensive when we see it. Wink, wink. Try benchmarking something like the following in your environment and see where you’re at: EDIT 2/13/2012: The code has been updated as I’ve become (imperceptibly) smarter and also noticed a few cut’n’paste errors that had crept in. Mea … Read more
In order to make it work you need to convert key from str to tuple before decryption(ast.literal_eval function). Here is fixed code: import Crypto from Crypto.PublicKey import RSA from Crypto import Random import ast random_generator = Random.new().read key = RSA.generate(1024, random_generator) #generate pub and priv key publickey = key.publickey() # pub key export for exchange … Read more
RSA can only encrypt data blocks that are shorter than the key length so what you normally do is Generate a random key of the correct length required for AES (or similar). Encrypt your data using AES or similar using that key Encrypt the random key using your RSA key Then you publish both the … Read more
You will need BouncyCastle: import org.bouncycastle.asn1.ASN1Encodable; import org.bouncycastle.asn1.ASN1Primitive; import org.bouncycastle.asn1.pkcs.PrivateKeyInfo; import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo; import org.bouncycastle.util.io.pem.PemObject; import org.bouncycastle.util.io.pem.PemWriter; The code snippets below have been checked and found working with Bouncy Castle 1.52. Private key Convert private key from PKCS8 to PKCS1: PrivateKey priv = pair.getPrivate(); byte[] privBytes = priv.getEncoded(); PrivateKeyInfo pkInfo = PrivateKeyInfo.getInstance(privBytes); ASN1Encodable encodable = pkInfo.parsePrivateKey(); … Read more
PyCrypto does not support X.509 certificates. You must first extract the public key with the command: openssl x509 -inform pem -in mycert.pem -pubkey -noout > publickey.pem Then, you can use RSA.importKey on publickey.pem. If you don’t want or cannot use openssl, you can take the PEM X.509 certificate and do it in pure Python like … Read more
You should avoid using RSACryptoServiceProvider if you can. It only works on Windows (and it’s the less good RSA implementation on Windows). Stick to the RSA base class, and create new instances via RSA.Create() Ephemeral Keys (Creation) .NET Core using (RSA rsa = RSA.Create()) { rsa.KeySize = desiredKeySizeInBits; // when the key next gets used … Read more