/// <summary>
/// Get the public key from a key pair blob
/// </summary>
/// <exception cref="ArgumentNullException">
/// If <paramref name="keyPair"/> is null
/// </exception>
/// <exception cref="InvalidOperationException">
/// If the key could not be extracted
/// </exception>
/// <param name="keyPair">key blob to get the public key from</param>
/// <returns>public key blob</returns>
public static byte[] ExtractPublicKeyFromKeyPair(byte[] keyPair)
{
if (keyPair == null)
{
throw new ArgumentNullException("keyPair");
}
// extract the public key portion of the blob
IntPtr publicKeyBuffer = IntPtr.Zero;
try
{
int publicKeyBlobSize = 0;
if (!StrongNameNative.StrongNameGetPublicKey(
null, keyPair, keyPair.Length, out publicKeyBuffer, out publicKeyBlobSize))
{
Marshal.ThrowExceptionForHR(StrongNameNative.StrongNameErrorInfo());
}
// copy the key out of unmanaged memory, and return it
byte[] publicKeyBlob = new byte[publicKeyBlobSize];
Marshal.Copy(publicKeyBuffer, publicKeyBlob, 0, publicKeyBlobSize);
return(publicKeyBlob);
}
finally
{
if (publicKeyBuffer != IntPtr.Zero)
{
StrongNameNative.StrongNameFreeBuffer(publicKeyBuffer);
}
}
}
/// <summary>
/// Get the public key from a key container
/// </summary>
/// <exception cref="ArgumentNullException">
/// If <paramref name="keyContainer"/> is null
/// </exception>
/// <exception cref="ArgumentException">
/// If <paramref name="keyContainer"/> is empty
/// </exception>
/// <exception cref="InvalidOperationException">
/// If the key could not be extracted
/// </exception>
/// <param name="keyContainer">key container to get the public key from</param>
/// <returns>public key blob</returns>
public static byte[] ExtractPublicKeyFromKeyContainer(string keyContainerName)
{
if (string.IsNullOrEmpty(keyContainerName))
{
throw new ArgumentNullOrEmptyException("keyContainerName");
}
// extract the public key portion of the blob
IntPtr publicKeyBuffer = IntPtr.Zero;
try
{
int publicKeyBlobSize = 0;
if (!StrongNameNative.StrongNameGetPublicKey(
keyContainerName, null, 0, out publicKeyBuffer, out publicKeyBlobSize))
{
Marshal.ThrowExceptionForHR(StrongNameNative.StrongNameErrorInfo());
}
// copy the key out of unmanaged memory, and return it
byte[] publicKeyBlob = new byte[publicKeyBlobSize];
Marshal.Copy(publicKeyBuffer, publicKeyBlob, 0, publicKeyBlobSize);
return(publicKeyBlob);
}
finally
{
if (publicKeyBuffer != IntPtr.Zero)
{
StrongNameNative.StrongNameFreeBuffer(publicKeyBuffer);
}
}
}
