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X509certificates containing ECDSA Example
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| // Current approach | |
| public class Net46Approach | |
| { | |
| public static byte[] SignECDsaSha512(byte[] data, X509Certificate2 cert) | |
| { | |
| // This would require using cert.Handle and a series of p/invokes to get at the | |
| // underlying key, then passing that to a CngKey object, and passing that to | |
| // new ECDsa(CngKey). It's a lot of work. | |
| throw new Exception("That's a lot of work..."); | |
| } | |
| public static byte[] SignECDsaSha512(byte[] data, ECDsa privateKey) | |
| { | |
| // This way works, but SignData probably better matches what you want. | |
| using (SHA512 hasher = SHA512.Create()) | |
| { | |
| byte[] signature1 = privateKey.SignHash(hasher.ComputeHash(data)); | |
| } | |
| // This might not be the ECDSAsa you got! | |
| ECDsaCng ecDsaCng = (ECDsaCng)privateKey; | |
| ecDsaCng.HashAlgorithm = CngAlgorithm.Sha512; | |
| return ecDsaCng.SignData(data); | |
| } | |
| } | |
| // The new way | |
| public class Net461Approach | |
| { | |
| public static byte[] SignECDsaSha512(byte[] data, X509Certificate2 cert) | |
| { | |
| using (ECDsa privateKey = cert.GetECDsaPrivateKey()) | |
| { | |
| return privateKey.SignData(data, HashAlgorithmName.SHA512); | |
| } | |
| } | |
| public static byte[] SignECDsaSha512(byte[] data, ECDsa privateKey) | |
| { | |
| return privateKey.SignData(data, HashAlgorithmName.SHA512); | |
| } | |
| } |
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