Not sure I get your question right but my bet is you’re asking how to convert between ASCII and number representation of characters. Encoding/Decoding has nothing to do with RSA. You just use dynamic range shift. As the alphabet is in increasing order in ASCII so the only thing left is to offset the a … Read more
To get the same value from java.security.PublicKey.getEnconded() on Chilkat library you have to use CkPublicKey.GetDer() and pass false to the boolean parameter to make it use the PKCS8 format. solved Digital signature between Java and Delphi
The problem is in the 4th from bottom line of code: System.out.println((noSuchProvdr.getMessage()); ^ Remove the extra parenthesis from there to make it System.out.println(noSuchProvdr.getMessage()); Edit: If the compiler is telling you java.security.NoSuchProviderException is never thrown in body of corresponding try statement, remove this last catch block catch (NoSuchProviderException noSuchProvdr) { System.out.println((noSuchProvdr.getMessage()); } 3 solved Making RSA … Read more
X509EncodedKeySpec is the SubjectPublicKey part of a certificate. So you probably need to decode this structure. You could look at BouncyCastle for C# and check out Org.BouncyCastle.Asn1.X509.SubjectPublicKeyInfo.GetInstance(byte[]) 1 solved convert java code with RSA to c#
Follow the documentation for AES encryption and modify it for RSA. Use AsymmetricAlgorithm.RsaPkcs1 as algorithm provider. Below example is for AES. byte[] keyMaterial; byte[] data; var provider = WinRTCrypto.SymmetricKeyAlgorithmProvider.OpenAlgorithm(SymmetricAlgorithm.AesCbcPkcs7); var key = provider.CreateSymmetricKey(keyMaterial); // The IV may be null, but supplying a random IV increases security. // The IV is not a secret like the … Read more
Sort answer is “no”. Long answer is to use sunrsasign Provider, which implements RSAKeyPairGenerator such that the public exponent is 65537: *”/** * RSA keypair generation. Standard algorithm, minimum key length 512 bit. * We generate two random primes until we find two where phi is relative * prime to the public exponent. Default exponent … Read more
Among other problems you are assuming that the ciphertext can be converted to UTF-8 meaningfully, and that isn’t guaranteed. If you want to encrypt text and transmit/store the encrypted contents as text you need to follow this pattern: Encrypt(textIn => textOut): Convert textIn to bytesIn via some encoding. UTF-8 is pretty good. Encrypt bytesIn to … Read more