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Diffstat (limited to 'wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/NostrCrypto.cs')
| -rw-r--r-- | wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/NostrCrypto.cs | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/NostrCrypto.cs b/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/NostrCrypto.cs new file mode 100644 index 0000000..1e833d2 --- /dev/null +++ b/wrappers/dotnet/VNLib.Utils.Cryptography.Noscrypt/src/NostrCrypto.cs @@ -0,0 +1,167 @@ +// Copyright (C) 2024 Vaughn Nugent +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as +// published by the Free Software Foundation, either version 3 of the +// License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see <https://www.gnu.org/licenses/>. + +using System; +using System.Runtime.CompilerServices; +using System.Diagnostics.CodeAnalysis; + +using VNLib.Utils.Cryptography.Noscrypt.@internal; +using VNLib.Utils.Cryptography.Noscrypt.Encryption; +using static VNLib.Utils.Cryptography.Noscrypt.NoscryptLibrary; + +using NCResult = System.Int64; + +namespace VNLib.Utils.Cryptography.Noscrypt +{ + /// <summary> + /// A default implementation of the <see cref="INostrCrypto"/> interface + /// </summary> + /// <param name="context">The initialized library context</param> + public unsafe class NostrCrypto(NCContext context, bool ownsContext) : VnDisposeable, INostrCrypto + { + /// <summary> + /// Gets the underlying library context. + /// </summary> + public NCContext Context => context; + + private ref readonly FunctionTable Functions => ref context.Library.Functions; + + ///<inheritdoc/> + public NoscryptCipher AllocCipher(NoscryptCipherVersion version, NoscryptCipherFlags flags) => new (context, version, flags); + + ///<inheritdoc/> + public void GetPublicKey(ref readonly NCSecretKey secretKey, ref NCPublicKey publicKey) + { + Check(); + + fixed (NCSecretKey* pSecKey = &secretKey) + fixed (NCPublicKey* pPubKey = &publicKey) + { + NCResult result = Functions.NCGetPublicKey.Invoke(context.DangerousGetHandle(), pSecKey, pPubKey); + NCUtil.CheckResult<FunctionTable.NCGetPublicKeyDelegate>(result, true); + } + } + + ///<inheritdoc/> + public void SignData( + ref readonly NCSecretKey secretKey, + ref readonly byte random32, + ref readonly byte data, + uint dataSize, + ref byte sig64 + ) + { + Check(); + + fixed (NCSecretKey* pSecKey = &secretKey) + fixed (byte* pData = &data, pSig = &sig64, pRandom = &random32) + { + NCResult result = Functions.NCSignData.Invoke( + ctx: context.DangerousGetHandle(), + sk: pSecKey, + random32: pRandom, + data: pData, + dataSize, + sig64: pSig + ); + + NCUtil.CheckResult<FunctionTable.NCSignDataDelegate>(result, true); + } + } + + ///<inheritdoc/> + public bool ValidateSecretKey(ref readonly NCSecretKey secretKey) + { + Check(); + + IntPtr libCtx = context.DangerousGetHandle(); + + fixed (NCSecretKey* pSecKey = &secretKey) + { + /* + * Validate should return a result of 1 if the secret key is valid + * or a 0 if it is not. + */ + NCResult result = Functions.NCValidateSecretKey.Invoke(libCtx, pSecKey); + NCUtil.CheckResult<FunctionTable.NCValidateSecretKeyDelegate>(result, false); + + return result == NC_SUCCESS; + } + } + + ///<inheritdoc/> + public bool VerifyData( + ref readonly NCPublicKey pubKey, + ref readonly byte data, + uint dataSize, + ref readonly byte sig64 + ) + { + Check(); + + fixed(NCPublicKey* pPubKey = &pubKey) + fixed (byte* pData = &data, pSig = &sig64) + { + NCResult result = Functions.NCVerifyData.Invoke(context.DangerousGetHandle(), pPubKey, pData, dataSize, pSig); + NCUtil.CheckResult<FunctionTable.NCVerifyDataDelegate>(result, false); + + return result == NC_SUCCESS; + } + } + +#if DEBUG + + /// <summary> + /// DEBUG ONLY: Gets the conversation key for the supplied secret key and public key + /// </summary> + /// <param name="secretKey">The sender's private key</param> + /// <param name="publicKey">The receiver's public key</param> + /// <param name="key32">A pointer to the 32byte buffer to write the conversation key to</param> + public void GetConverstationKey( + ref readonly NCSecretKey secretKey, + ref readonly NCPublicKey publicKey, + ref byte key32 + ) + { + Check(); + + fixed (NCSecretKey* pSecKey = &secretKey) + fixed (NCPublicKey* pPubKey = &publicKey) + fixed (byte* pKey = &key32) + { + NCResult result = Functions.NCGetConversationKey.Invoke(context.DangerousGetHandle(), pSecKey, pPubKey, pKey); + NCUtil.CheckResult<FunctionTable.NCGetConversationKeyDelegate>(result, true); + } + } + +#endif + ///<inheritdoc/> + protected override void Free() + { + if(ownsContext) + { + context.Dispose(); + } + } + + private static void ThrowIfNullRef([DoesNotReturnIf(false)] ref readonly byte value, string name) + { + if(Unsafe.IsNullRef(in value)) + { + throw new ArgumentNullException(name); + } + } + } +} |