/// <summary>Replace the passed the public key on the passed in secret key.</summary>
/// <param name="secretKey">Secret key to change.</param>
/// <param name="publicKey">New public key.</param>
/// <returns>A new secret key.</returns>
/// <exception cref="ArgumentException">If KeyId's do not match.</exception>
public static PgpSecretKey ReplacePublicKey(
PgpSecretKey secretKey,
PgpPublicKey publicKey)
{
if (publicKey.KeyId != secretKey.KeyId)
{
throw new ArgumentException("KeyId's do not match");
}
return(new PgpSecretKey(secretKey.secret, publicKey));
}
/// <summary>Return the PGP secret key associated with the given key id.</summary>
/// <param name="keyId">The ID of the secret key to return.</param>
public PgpSecretKey GetSecretKey(
long keyId)
{
foreach (PgpSecretKeyRing secRing in GetKeyRings())
{
PgpSecretKey sec = secRing.GetSecretKey(keyId);
if (sec != null)
{
return(sec);
}
}
return(null);
}
/// <summary>
/// Replace the public key set on the secret ring with the corresponding key off the public ring.
/// </summary>
/// <param name="secretRing">Secret ring to be changed.</param>
/// <param name="publicRing">Public ring containing the new public key set.</param>
public static PgpSecretKeyRing ReplacePublicKeys(
PgpSecretKeyRing secretRing,
PgpPublicKeyRing publicRing)
{
IList newList = Platform.CreateArrayList(secretRing.keys.Count);
foreach (PgpSecretKey sk in secretRing.keys)
{
PgpPublicKey pk = publicRing.GetPublicKey(sk.KeyId);
newList.Add(PgpSecretKey.ReplacePublicKey(sk, pk));
}
return(new PgpSecretKeyRing(newList));
}
/// <summary>
/// Return a copy of the passed in secret key ring, with the master key and sub keys encrypted
/// using a new password and the passed in algorithm.
/// </summary>
/// <param name="ring">The <c>PgpSecretKeyRing</c> to be copied.</param>
/// <param name="oldPassPhrase">The current password for key.</param>
/// <param name="newPassPhrase">The new password for the key.</param>
/// <param name="newEncAlgorithm">The algorithm to be used for the encryption.</param>
/// <param name="rand">Source of randomness.</param>
public static PgpSecretKeyRing CopyWithNewPassword(
PgpSecretKeyRing ring,
char[] oldPassPhrase,
char[] newPassPhrase,
SymmetricKeyAlgorithmTag newEncAlgorithm,
SecureRandom rand)
{
IList newKeys = Platform.CreateArrayList(ring.keys.Count);
foreach (PgpSecretKey secretKey in ring.GetSecretKeys())
{
newKeys.Add(PgpSecretKey.CopyWithNewPassword(secretKey, oldPassPhrase, newPassPhrase, newEncAlgorithm, rand));
}
return(new PgpSecretKeyRing(newKeys, ring.extraPubKeys));
}
/// <summary>
/// Returns a new key ring with the secret key passed in either added or
/// replacing an existing one with the same key ID.
/// </summary>
/// <param name="secRing">The secret key ring to be modified.</param>
/// <param name="secKey">The secret key to be inserted.</param>
/// <returns>A new <c>PgpSecretKeyRing</c></returns>
public static PgpSecretKeyRing InsertSecretKey(
PgpSecretKeyRing secRing,
PgpSecretKey secKey)
{
IList keys = Platform.CreateArrayList(secRing.keys);
bool found = false;
bool masterFound = false;
for (int i = 0; i != keys.Count; i++)
{
PgpSecretKey key = (PgpSecretKey)keys[i];
if (key.KeyId == secKey.KeyId)
{
found = true;
keys[i] = secKey;
}
if (key.IsMasterKey)
{
masterFound = true;
}
}
if (!found)
{
if (secKey.IsMasterKey)
{
if (masterFound)
{
throw new ArgumentException("cannot add a master key to a ring that already has one");
}
keys.Insert(0, secKey);
}
else
{
keys.Add(secKey);
}
}
return(new PgpSecretKeyRing(keys, secRing.extraPubKeys));
}
/// <summary>Returns a new key ring with the secret key passed in removed from the key ring.</summary>
/// <param name="secRing">The secret key ring to be modified.</param>
/// <param name="secKey">The secret key to be removed.</param>
/// <returns>A new <c>PgpSecretKeyRing</c>, or null if secKey is not found.</returns>
public static PgpSecretKeyRing RemoveSecretKey(
PgpSecretKeyRing secRing,
PgpSecretKey secKey)
{
IList keys = Platform.CreateArrayList(secRing.keys);
bool found = false;
for (int i = 0; i < keys.Count; i++)
{
PgpSecretKey key = (PgpSecretKey)keys[i];
if (key.KeyId == secKey.KeyId)
{
found = true;
keys.RemoveAt(i);
}
}
return(found ? new PgpSecretKeyRing(keys, secRing.extraPubKeys) : null);
}
/// <summary>Return the secret key ring which contains the key referred to by keyId</summary>
/// <param name="keyId">The ID of the secret key</param>
public PgpSecretKeyRing GetSecretKeyRing(
long keyId)
{
long id = keyId;
if (secretRings.Contains(id))
{
return((PgpSecretKeyRing)secretRings[id]);
}
foreach (PgpSecretKeyRing secretRing in GetKeyRings())
{
PgpSecretKey secret = secretRing.GetSecretKey(keyId);
if (secret != null)
{
return(secretRing);
}
}
return(null);
}
/// <summary>
/// Return a copy of the passed in secret key, encrypted using a new password
/// and the passed in algorithm.
/// </summary>
/// <param name="key">The PgpSecretKey to be copied.</param>
/// <param name="oldPassPhrase">The current password for the key.</param>
/// <param name="newPassPhrase">The new password for the key.</param>
/// <param name="newEncAlgorithm">The algorithm to be used for the encryption.</param>
/// <param name="rand">Source of randomness.</param>
public static PgpSecretKey CopyWithNewPassword(
PgpSecretKey key,
char[] oldPassPhrase,
char[] newPassPhrase,
SymmetricKeyAlgorithmTag newEncAlgorithm,
SecureRandom rand)
{
byte[] rawKeyData = key.ExtractKeyData(oldPassPhrase);
int s2kUsage = key.secret.S2kUsage;
byte[] iv = null;
S2k s2k = null;
byte[] keyData;
if (newEncAlgorithm == SymmetricKeyAlgorithmTag.Null)
{
s2kUsage = SecretKeyPacket.UsageNone;
if (key.secret.S2kUsage == SecretKeyPacket.UsageSha1) // SHA-1 hash, need to rewrite Checksum
{
keyData = new byte[rawKeyData.Length - 18];
Array.Copy(rawKeyData, 0, keyData, 0, keyData.Length - 2);
byte[] check = Checksum(false, keyData, keyData.Length - 2);
keyData[keyData.Length - 2] = check[0];
keyData[keyData.Length - 1] = check[1];
}
else
{
keyData = rawKeyData;
}
}
else
{
try
{
keyData = EncryptKeyData(rawKeyData, newEncAlgorithm, newPassPhrase, rand, out s2k, out iv);
}
catch (PgpException e)
{
throw e;
}
catch (Exception e)
{
throw new PgpException("Exception encrypting key", e);
}
}
SecretKeyPacket secret;
if (key.secret is SecretSubkeyPacket)
{
secret = new SecretSubkeyPacket(key.secret.PublicKeyPacket,
newEncAlgorithm, s2kUsage, s2k, iv, keyData);
}
else
{
secret = new SecretKeyPacket(key.secret.PublicKeyPacket,
newEncAlgorithm, s2kUsage, s2k, iv, keyData);
}
return(new PgpSecretKey(secret, key.pub));
}