diff options
Diffstat (limited to 'back-end/libs/NVault.Crypto.Secp256k1/src/ContextExtensions.cs')
| -rw-r--r-- | back-end/libs/NVault.Crypto.Secp256k1/src/ContextExtensions.cs | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/back-end/libs/NVault.Crypto.Secp256k1/src/ContextExtensions.cs b/back-end/libs/NVault.Crypto.Secp256k1/src/ContextExtensions.cs index b0e8695..a89fce8 100644 --- a/back-end/libs/NVault.Crypto.Secp256k1/src/ContextExtensions.cs +++ b/back-end/libs/NVault.Crypto.Secp256k1/src/ContextExtensions.cs @@ -15,6 +15,7 @@ using System; using System.Security.Cryptography; +using System.Runtime.InteropServices; using VNLib.Hashing; using VNLib.Utils; @@ -89,7 +90,8 @@ namespace NVault.Crypto.Secp256k1 try { - fixed (byte* sigPtr = signature, digestPtr = digest) + fixed (byte* sigPtr = &MemoryMarshal.GetReference(signature), + digestPtr = &MemoryMarshal.GetReference(digest)) { //Sign the message hash and write the output to the signature buffer if (context.Lib._signHash(context.Context, sigPtr, digestPtr, &keyPair, random) != 1) @@ -153,7 +155,7 @@ namespace NVault.Crypto.Secp256k1 return ERRNO.E_FAIL; } - fixed (byte* pubBuffer = pubKeyBuffer) + fixed (byte* pubBuffer = &MemoryMarshal.GetReference(pubKeyBuffer)) { //Serialize the public key to the buffer as an X-only public key without leading status byte if (context.Lib._serializeXonly(context.Context, pubBuffer, &xOnlyPubKey) != 1) @@ -171,5 +173,28 @@ namespace NVault.Crypto.Secp256k1 //PubKey length is constant return XOnlyPublicKeySize; } + + /// <summary> + /// Verifies that a given secret key is valid using the current context + /// </summary> + /// <param name="context"></param> + /// <param name="secretKey">The secret key to verify</param> + /// <returns>A boolean value that indicates if the secret key is valid or not</returns> + /// <exception cref="CryptographicException"></exception> + public static bool VerifySecretKey(this in Secp256k1Context context, ReadOnlySpan<byte> secretKey) + { + if (secretKey.Length != SecretKeySize) + { + throw new CryptographicException($"Your secret key must be exactly {SecretKeySize} bytes long"); + } + + context.Lib.SafeLibHandle.ThrowIfClosed(); + + //Get sec key ref and verify + fixed(byte* ptr = &MemoryMarshal.GetReference(secretKey)) + { + return context.Lib._secKeyVerify.Invoke(context.Context, ptr) == 1; + } + } } }
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