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(Mono C#) RSA Encrypt with SHA-256 hash function and SHA-1 mask functionHow can this Javascript be duplicated using Chilkat? function a(e, t) { var r = s.pki.publicKeyFromPem(e) , n = r.encrypt(t, "RSA-OAEP", { md: s.md.sha256.create(), mgf1: { md: s.md.sha1.create() } }); return s.util.encode64(n) } Note: The OAEP padding uses random bytes in the padding, and therefore each time encryption happens, even using the same data and key, the result will be different -- but still valid. One should not expect to get the same output.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Chilkat.PublicKey pubkey = new Chilkat.PublicKey(); Chilkat.StringBuilder sbPem = new Chilkat.StringBuilder(); bool bCrlf = true; sbPem.AppendLine("-----BEGIN PUBLIC KEY-----",bCrlf); sbPem.AppendLine("MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA33TqqLR3eeUmDtHS89qF",bCrlf); sbPem.AppendLine("3p4MP7Wfqt2Zjj3lZjLjjCGDvwr9cJNlNDiuKboODgUiT4ZdPWbOiMAfDcDzlOxA",bCrlf); sbPem.AppendLine("04DDnEFGAf+kDQiNSe2ZtqC7bnIc8+KSG/qOGQIVaay4Ucr6ovDkykO5Hxn7OU7s",bCrlf); sbPem.AppendLine("Jp9TP9H0JH8zMQA6YzijYH9LsupTerrY3U6zyihVEDXXOv08vBHk50BMFJbE9iwF",bCrlf); sbPem.AppendLine("wnxCsU5+UZUZYw87Uu0n4LPFS9BT8tUIvAfnRXIEWCha3KbFWmdZQZlyrFw0buUE",bCrlf); sbPem.AppendLine("f0YN3/Q0auBkdbDR/ES2PbgKTJdkjc/rEeM0TxvOUf7HuUNOhrtAVEN1D5uuxE1W",bCrlf); sbPem.AppendLine("SwIDAQAB",bCrlf); sbPem.AppendLine("-----END PUBLIC KEY-----",bCrlf); // Load the public key object from the PEM. bool success = pubkey.LoadFromString(sbPem.GetAsString()); if (success != true) { Debug.WriteLine(pubkey.LastErrorText); return; } string originalData = "This is the original data to be SHA-256 hashed and RSA encrypted."; // First we SHA-256 hash the original data. Chilkat.Crypt2 crypt = new Chilkat.Crypt2(); crypt.HashAlgorithm = "SHA-256"; byte[] hashBytes = null; hashBytes = crypt.HashString(originalData); // Now to RSA encrypt using OAEP padding with SHA-1 for the mask function. Chilkat.Rsa rsa = new Chilkat.Rsa(); rsa.OaepPadding = true; rsa.OaepHash = "SHA1"; rsa.ImportPublicKeyObj(pubkey); rsa.EncodingMode = "base64"; // Note: The OAEP padding uses random bytes in the padding, and therefore each time encryption happens, // even using the same data and key, the result will be different -- but still valid. One should not expect // to get the same output. bool bUsePrivateKey = false; string encryptedStr = rsa.EncryptBytesENC(hashBytes,bUsePrivateKey); if (rsa.LastMethodSuccess != true) { Debug.WriteLine(rsa.LastErrorText); return; } Debug.WriteLine("Base64 RSA encrypted output: " + encryptedStr); |
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