C＃的RSA公用密鑰的公用密鑰

Question

我需要在c＃項目中使用RSA密碼術將加密的數據發送到服務。 服務給了我這樣的公鑰：

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAjU/bq6YZD2H0DUhbtEBg
JIyiurM8eX3aH02/ZWr6VZ27WF93ylWC4cGAe50sSgiA8NCW0G/UL77kAkebJQrJ
jVdt7SvDypSPk1mXNK0i9cI9DrdmAHLGLlYJx7eeY6h4JShLhOBnKRghi0S4uL5N
L7W4OUgCeUlGWcmz8ssNEQ5w17rfUF9TxYEFVKFMGN/SSaYNUr4znGt2r97YPsPy
0Sk4dGHhMXr1QGR05UQeVuU43OuRAFxA71YbuCRUYg5ENwKM/1RnNcu8v7kXFA4L
qGV9AncHLIZEOqWgY+4balVXlKIcMVN6W+PXKJpowOyB9QIq1Ec3OMaJ3sGpOppx
KQIDAQAB
-----END PUBLIC KEY-----

如何將其轉換為base64字符串以用於此代碼？

public static string EncryptData(string publicKey, string clearText)
{
    IBuffer keyBuffer = CryptographicBuffer.DecodeFromBase64String(publicKey);
    AsymmetricKeyAlgorithmProvider asym = AsymmetricKeyAlgorithmProvider.OpenAlgorithm(AsymmetricAlgorithmNames.RsaPkcs1);
    CryptographicKey key = asym.ImportPublicKey(keyBuffer, CryptographicPublicKeyBlobType.Capi1PublicKey);
    IBuffer plainBuffer = CryptographicBuffer.ConvertStringToBinary(clearText, BinaryStringEncoding.Utf8);
    IBuffer encryptedBuffer = CryptographicEngine.Encrypt(key, plainBuffer, null);
    byte[] encryptedBytes;
    CryptographicBuffer.CopyToByteArray(encryptedBuffer, out encryptedBytes);
    return Convert.ToBase64String(encryptedBytes);
}

Answer 1

我找到了解決方案，這很容易：我需要使用：

 CryptographicKey key = asym.ImportPublicKey(keyBuffer, CryptographicPublicKeyBlobType.X509SubjectPublicKeyInfo);