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using System;
using System.IO;
namespace Org.BouncyCastle.Bcpg.OpenPgp.Examples
{
internal class PgpExampleUtilities
{
internal static byte[] CompressFile(string fileName, CompressionAlgorithmTag algorithm)
{
MemoryStream bOut = new MemoryStream();
PgpCompressedDataGenerator comData = new PgpCompressedDataGenerator(algorithm);
PgpUtilities.WriteFileToLiteralData(comData.Open(bOut), PgpLiteralData.Binary,
new FileInfo(fileName));
comData.Close();
return bOut.ToArray();
}
/**
* Search a secret key ring collection for a secret key corresponding to keyID if it
* exists.
*
* @param pgpSec a secret key ring collection.
* @param keyID keyID we want.
* @param pass passphrase to decrypt secret key with.
* @return
* @throws PGPException
* @throws NoSuchProviderException
*/
internal static PgpPrivateKey FindSecretKey(PgpSecretKeyRingBundle pgpSec, long keyID, char[] pass)
{
PgpSecretKey pgpSecKey = pgpSec.GetSecretKey(keyID);
if (pgpSecKey == null)
{
return null;
}
return pgpSecKey.ExtractPrivateKey(pass);
}
internal static PgpPublicKey ReadPublicKey(string fileName)
{
using (Stream keyIn = File.OpenRead(fileName))
{
return ReadPublicKey(keyIn);
}
}
/**
* A simple routine that opens a key ring file and loads the first available key
* suitable for encryption.
*
* @param input
* @return
* @throws IOException
* @throws PGPException
*/
internal static PgpPublicKey ReadPublicKey(Stream input)
{
PgpPublicKeyRingBundle pgpPub = new PgpPublicKeyRingBundle(
PgpUtilities.GetDecoderStream(input));
//
// we just loop through the collection till we find a key suitable for encryption, in the real
// world you would probably want to be a bit smarter about this.
//
foreach (PgpPublicKeyRing keyRing in pgpPub.GetKeyRings())
{
foreach (PgpPublicKey key in keyRing.GetPublicKeys())
{
if (key.IsEncryptionKey)
{
return key;
}
}
}
throw new ArgumentException("Can't find encryption key in key ring.");
}
internal static PgpSecretKey ReadSecretKey(string fileName)
{
using (Stream keyIn = File.OpenRead(fileName))
{
return ReadSecretKey(keyIn);
}
}
/**
* A simple routine that opens a key ring file and loads the first available key
* suitable for signature generation.
*
* @param input stream to read the secret key ring collection from.
* @return a secret key.
* @throws IOException on a problem with using the input stream.
* @throws PGPException if there is an issue parsing the input stream.
*/
internal static PgpSecretKey ReadSecretKey(Stream input)
{
PgpSecretKeyRingBundle pgpSec = new PgpSecretKeyRingBundle(
PgpUtilities.GetDecoderStream(input));
//
// we just loop through the collection till we find a key suitable for encryption, in the real
// world you would probably want to be a bit smarter about this.
//
foreach (PgpSecretKeyRing keyRing in pgpSec.GetKeyRings())
{
foreach (PgpSecretKey key in keyRing.GetSecretKeys())
{
if (key.IsSigningKey)
{
return key;
}
}
}
throw new ArgumentException("Can't find signing key in key ring.");
}
}
}
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