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
It is complicated, but I’ll try to explain as best I can. I think I’ll start with Java. My discussion is geared to Java 6, I’m not sure what has changed in Java 7. Java’ built-in cryptography is available through the Java Cryptography Extension (JCE). This extension has two parts to it, the application API … Read more
For output as Hex-String import java.security.*; public class Test { public static void main(String[] args) throws NoSuchAlgorithmException, NoSuchProviderException { KeyPairGenerator keyGen = KeyPairGenerator.getInstance(“RSA”); keyGen.initialize(512); byte[] publicKey = keyGen.genKeyPair().getPublic().getEncoded(); StringBuffer retString = new StringBuffer(); for (int i = 0; i < publicKey.length; ++i) { retString.append(Integer.toHexString(0x0100 + (publicKey[i] & 0x00FF)).substring(1)); } System.out.println(retString); } } For output as … Read more
If you’re using Win32, why don’t you simply use the built-in win32 crypto-API? Here’s a little example how it works in practice: http://www.codeproject.com/KB/security/EncryptionCryptoAPI.aspx
I have tried RSA Encryption and Decryption for NSString. Here is the code: Add Security.Framework to your project bundle. ViewController.h code is as follows: #import <UIKit/UIKit.h> #import <Security/Security.h> @interface ViewController : UIViewController { SecKeyRef publicKey; SecKeyRef privateKey; NSData *publicTag; NSData *privateTag; } – (void)encryptWithPublicKey:(uint8_t *)plainBuffer cipherBuffer:(uint8_t *)cipherBuffer; – (void)decryptWithPrivateKey:(uint8_t *)cipherBuffer plainBuffer:(uint8_t *)plainBuffer; – (SecKeyRef)getPublicKeyRef; – … Read more
The difference The difference between signing with “SHA256withRSA” and computing the SHA256 hash and signing it with “RSA” (= “NONEwithRSA”) is foremost that in the former case the calculated SHA-256 hash value is first encapsulated in a DigestInfo structure DigestInfo ::= SEQUENCE { digestAlgorithm DigestAlgorithm, digest OCTET STRING } before being padded and then encrypted … Read more
The message “client_global_hostkeys_private_confirm: server gave bad signature for RSA key 0” is not an error, it is a warning, and it is related to some ssh versioning issue. It used to be very common to receive from GitLab. If you want it to go away, you can make sure that your ~/.ssh/config contains the following: … Read more
Further to Julien Kronegg’s answer, if you are getting this error because your file has a PKCS#1 format, you can use the following steps to convert it to a PKCS#8 file. First, save your PKCS#1 key file to a file called priv1.pem: —–BEGIN RSA PRIVATE KEY—– […] —–END RSA PRIVATE KEY—– Then, execute the following … Read more
jwt.io says to enter the key Public Key or Certificate. Enter it in plain text only if you want to verify a token so I have converted the JSON Web Key to a PEM format guessing it would need a base64 format, and it works!. This is the public key built from modulus and exponent … Read more