/// <summary>
/// Parse a variable-length public key into the pubkey object.
/// This function supports parsing compressed (33 bytes, header byte 0x02 or
/// 0x03), uncompressed(65 bytes, header byte 0x04), or hybrid(65 bytes, header
/// byte 0x06 or 0x07) format public keys.
/// </summary>
/// <param name="publicKeyOutput">(Output) pointer to a pubkey object. If 1 is returned, it is set to a parsed version of input. If not, its value is undefined.</param>
/// <param name="serializedPublicKey">Serialized public key.</param>
/// <returns>True if the public key was fully valid, false if the public key could not be parsed or is invalid.</returns>
public static unsafe bool PublicKeyParse(Span <byte> publicKeyOutput, Span <byte> serializedPublicKey)
{
var inputLen = serializedPublicKey.Length;
if (inputLen != 33 && inputLen != 65)
{
throw new ArgumentException($"{nameof(serializedPublicKey)} must be 33 or 65 bytes");
}
if (publicKeyOutput.Length < 64)
{
throw new ArgumentException($"{nameof(publicKeyOutput)} must be {64} bytes");
}
fixed(byte *pubKeyPtr = &MemoryMarshal.GetReference(publicKeyOutput),
serializedPtr = &MemoryMarshal.GetReference(serializedPublicKey))
{
return((Platform == OsPlatform.Windows
? Win64Lib.secp256k1_ec_pubkey_parse(Context, pubKeyPtr, serializedPtr, (uint)inputLen)
: Platform == OsPlatform.Linux
? PosixLib.secp256k1_ec_pubkey_parse(Context, pubKeyPtr, serializedPtr, (uint)inputLen)
: MacLib.secp256k1_ec_pubkey_parse(Context, pubKeyPtr, serializedPtr, (uint)inputLen)) == 1);
}
}
