/// <summary>Add a PBE encryption method to the encrypted object.</summary>
public void AddMethod(ReadOnlySpan <byte> rawPassPhrase, PgpHashAlgorithm s2kDigest)
{
S2k s2k = PgpUtilities.GenerateS2k(s2kDigest, 0x60);
byte[] key = new byte[PgpUtilities.GetKeySize(defAlgorithm) / 8];
S2kBasedEncryption.MakeKey(rawPassPhrase, s2kDigest, s2k.GetIV(), s2k.IterationCount, key);
methods.Add(new PbeMethod(defAlgorithm, s2k, key));
}
public static KeyParameter MakeKeyFromPassPhrase(
SymmetricKeyAlgorithmTag algorithm,
S2k s2k,
char[] passPhrase)
{
int keySize = GetKeySize(algorithm);
byte[] pBytes = Strings.ToByteArray(new string(passPhrase));
byte[] keyBytes = new byte[(keySize + 7) / 8];
int generatedBytes = 0;
int loopCount = 0;
while (generatedBytes < keyBytes.Length)
{
IDigest digest;
if (s2k != null)
{
try
{
switch (s2k.HashAlgorithm)
{
case HashAlgorithmTag.Sha1:
digest = DigestUtilities.GetDigest("SHA1");
break;
default:
throw new PgpException("unknown hash algorithm: " + s2k.HashAlgorithm);
}
}
catch (Exception e)
{
throw new PgpException("can't find S2k digest", e);
}
for (int i = 0; i != loopCount; i++)
{
digest.Update(0);
}
byte[] iv = s2k.GetIV();
switch (s2k.Type)
{
case S2k.Simple:
digest.BlockUpdate(pBytes, 0, pBytes.Length);
break;
case S2k.Salted:
digest.BlockUpdate(iv, 0, iv.Length);
digest.BlockUpdate(pBytes, 0, pBytes.Length);
break;
case S2k.SaltedAndIterated:
long count = s2k.IterationCount;
digest.BlockUpdate(iv, 0, iv.Length);
digest.BlockUpdate(pBytes, 0, pBytes.Length);
count -= iv.Length + pBytes.Length;
while (count > 0)
{
if (count < iv.Length)
{
digest.BlockUpdate(iv, 0, (int)count);
break;
}
else
{
digest.BlockUpdate(iv, 0, iv.Length);
count -= iv.Length;
}
if (count < pBytes.Length)
{
digest.BlockUpdate(pBytes, 0, (int)count);
count = 0;
}
else
{
digest.BlockUpdate(pBytes, 0, pBytes.Length);
count -= pBytes.Length;
}
}
break;
default:
throw new PgpException("unknown S2k type: " + s2k.Type);
}
}
else
{
try
{
digest = DigestUtilities.GetDigest("MD5");
for (int i = 0; i != loopCount; i++)
{
digest.Update(0);
}
digest.BlockUpdate(pBytes, 0, pBytes.Length);
}
catch (Exception e)
{
throw new PgpException("can't find MD5 digest", e);
}
}
byte[] dig = DigestUtilities.DoFinal(digest);
if (dig.Length > (keyBytes.Length - generatedBytes))
{
Array.Copy(dig, 0, keyBytes, generatedBytes, keyBytes.Length - generatedBytes);
}
else
{
Array.Copy(dig, 0, keyBytes, generatedBytes, dig.Length);
}
generatedBytes += dig.Length;
loopCount++;
}
Array.Clear(pBytes, 0, pBytes.Length);
return MakeKey(algorithm, keyBytes);
}
public static KeyParameter MakeKeyFromPassPhrase(
SymmetricKeyAlgorithmTag algorithm,
S2k s2k,
char[] passPhrase)
{
int keySize = GetKeySize(algorithm);
byte[] pBytes = Strings.ToByteArray(new string(passPhrase));
byte[] keyBytes = new byte[(keySize + 7) / 8];
int generatedBytes = 0;
int loopCount = 0;
while (generatedBytes < keyBytes.Length)
{
IDigest digest;
if (s2k != null)
{
string digestName = GetDigestName(s2k.HashAlgorithm);
try
{
digest = DigestUtilities.GetDigest(digestName);
}
catch (Exception e)
{
throw new PgpException("can't find S2k digest", e);
}
for (int i = 0; i != loopCount; i++)
{
digest.Update(0);
}
byte[] iv = s2k.GetIV();
switch (s2k.Type)
{
case S2k.Simple:
digest.BlockUpdate(pBytes, 0, pBytes.Length);
break;
case S2k.Salted:
digest.BlockUpdate(iv, 0, iv.Length);
digest.BlockUpdate(pBytes, 0, pBytes.Length);
break;
case S2k.SaltedAndIterated:
long count = s2k.IterationCount;
digest.BlockUpdate(iv, 0, iv.Length);
digest.BlockUpdate(pBytes, 0, pBytes.Length);
count -= iv.Length + pBytes.Length;
while (count > 0)
{
if (count < iv.Length)
{
digest.BlockUpdate(iv, 0, (int)count);
break;
}
else
{
digest.BlockUpdate(iv, 0, iv.Length);
count -= iv.Length;
}
if (count < pBytes.Length)
{
digest.BlockUpdate(pBytes, 0, (int)count);
count = 0;
}
else
{
digest.BlockUpdate(pBytes, 0, pBytes.Length);
count -= pBytes.Length;
}
}
break;
default:
throw new PgpException("unknown S2k type: " + s2k.Type);
}
}
else
{
try
{
digest = DigestUtilities.GetDigest("MD5");
for (int i = 0; i != loopCount; i++)
{
digest.Update(0);
}
digest.BlockUpdate(pBytes, 0, pBytes.Length);
}
catch (Exception e)
{
throw new PgpException("can't find MD5 digest", e);
}
}
byte[] dig = DigestUtilities.DoFinal(digest);
if (dig.Length > (keyBytes.Length - generatedBytes))
{
Array.Copy(dig, 0, keyBytes, generatedBytes, keyBytes.Length - generatedBytes);
}
else
{
Array.Copy(dig, 0, keyBytes, generatedBytes, dig.Length);
}
generatedBytes += dig.Length;
loopCount++;
}
Array.Clear(pBytes, 0, pBytes.Length);
return(MakeKey(algorithm, keyBytes));
}
public static KeyParameter MakeKeyFromPassPhrase(
SymmetricKeyAlgorithmTag algorithm,
S2k s2k,
char[] passPhrase)
{
// Changed pBytes to get string via encoding
// this should use the OS encoding.
//
// vvv EDDINGTON
var encoding = System.Text.Encoding.UTF8;
int keySize = GetKeySize(algorithm);
byte[] pBytes = encoding.GetBytes(new string(passPhrase));
byte[] keyBytes = new byte[(keySize + 7) / 8];
// ^^^ EDDINGTON
int generatedBytes = 0;
int loopCount = 0;
while (generatedBytes < keyBytes.Length)
{
IDigest digest;
if (s2k != null)
{
string digestName = GetDigestName(s2k.HashAlgorithm);
try
{
digest = DigestUtilities.GetDigest(digestName);
}
catch (Exception e)
{
throw new PgpException("can't find S2k digest", e);
}
for (int i = 0; i != loopCount; i++)
{
digest.Update(0);
}
byte[] iv = s2k.GetIV();
switch (s2k.Type)
{
case S2k.Simple:
digest.BlockUpdate(pBytes, 0, pBytes.Length);
break;
case S2k.Salted:
digest.BlockUpdate(iv, 0, iv.Length);
digest.BlockUpdate(pBytes, 0, pBytes.Length);
break;
case S2k.SaltedAndIterated:
long count = s2k.IterationCount;
digest.BlockUpdate(iv, 0, iv.Length);
digest.BlockUpdate(pBytes, 0, pBytes.Length);
count -= iv.Length + pBytes.Length;
while (count > 0)
{
if (count < iv.Length)
{
digest.BlockUpdate(iv, 0, (int)count);
break;
}
else
{
digest.BlockUpdate(iv, 0, iv.Length);
count -= iv.Length;
}
if (count < pBytes.Length)
{
digest.BlockUpdate(pBytes, 0, (int)count);
count = 0;
}
else
{
digest.BlockUpdate(pBytes, 0, pBytes.Length);
count -= pBytes.Length;
}
}
break;
default:
throw new PgpException("unknown S2k type: " + s2k.Type);
}
}
else
{
try
{
digest = DigestUtilities.GetDigest("MD5");
for (int i = 0; i != loopCount; i++)
{
digest.Update(0);
}
digest.BlockUpdate(pBytes, 0, pBytes.Length);
}
catch (Exception e)
{
throw new PgpException("can't find MD5 digest", e);
}
}
byte[] dig = DigestUtilities.DoFinal(digest);
if (dig.Length > (keyBytes.Length - generatedBytes))
{
Array.Copy(dig, 0, keyBytes, generatedBytes, keyBytes.Length - generatedBytes);
}
else
{
Array.Copy(dig, 0, keyBytes, generatedBytes, dig.Length);
}
generatedBytes += dig.Length;
loopCount++;
}
Array.Clear(pBytes, 0, pBytes.Length);
return MakeKey(algorithm, keyBytes);
}
internal static byte[] MakeKeyFromPassPhrase(
IDigestFactory <PgpDigestTypeIdentifier> digestFactory,
SymmetricKeyAlgorithmTag algorithm,
S2k s2k,
char[] passPhrase)
{
int keySize = 0;
switch (algorithm)
{
case SymmetricKeyAlgorithmTag.TripleDes:
keySize = 192;
break;
case SymmetricKeyAlgorithmTag.Idea:
keySize = 128;
break;
case SymmetricKeyAlgorithmTag.Cast5:
keySize = 128;
break;
case SymmetricKeyAlgorithmTag.Blowfish:
keySize = 128;
break;
case SymmetricKeyAlgorithmTag.Safer:
keySize = 128;
break;
case SymmetricKeyAlgorithmTag.Des:
keySize = 64;
break;
case SymmetricKeyAlgorithmTag.Aes128:
keySize = 128;
break;
case SymmetricKeyAlgorithmTag.Aes192:
keySize = 192;
break;
case SymmetricKeyAlgorithmTag.Aes256:
keySize = 256;
break;
case SymmetricKeyAlgorithmTag.Twofish:
keySize = 256;
break;
case SymmetricKeyAlgorithmTag.Camellia128:
keySize = 128;
break;
case SymmetricKeyAlgorithmTag.Camellia192:
keySize = 192;
break;
case SymmetricKeyAlgorithmTag.Camellia256:
keySize = 256;
break;
default:
throw new PgpException("unknown symmetric algorithm: " + algorithm);
}
byte[] pBytes = Strings.ToUtf8ByteArray(passPhrase);
byte[] keyBytes = new byte[(keySize + 7) / 8];
int generatedBytes = 0;
int loopCount = 0;
if (s2k != null)
{
if (s2k.HashAlgorithm != digestFactory.AlgorithmDetails.Algorithm)
{
throw new PgpException("s2k/digestFactory mismatch");
}
}
else
{
if (digestFactory.AlgorithmDetails.Algorithm != HashAlgorithmTag.MD5)
{
throw new PgpException("digestFactory not for MD5");
}
}
IStreamCalculator <IBlockResult> digestCalculator = digestFactory.CreateCalculator();
Stream dOut = digestCalculator.Stream;
try
{
while (generatedBytes < keyBytes.Length)
{
if (s2k != null)
{
for (int i = 0; i != loopCount; i++)
{
dOut.WriteByte(0);
}
byte[] iv = s2k.GetIV();
switch (s2k.Type)
{
case S2k.Simple:
dOut.Write(pBytes, 0, pBytes.Length);
break;
case S2k.Salted:
dOut.Write(iv, 0, iv.Length);
dOut.Write(pBytes, 0, pBytes.Length);
break;
case S2k.SaltedAndIterated:
long count = s2k.IterationCount;
dOut.Write(iv, 0, iv.Length);
dOut.Write(pBytes, 0, pBytes.Length);
count -= iv.Length + pBytes.Length;
while (count > 0)
{
if (count < iv.Length)
{
dOut.Write(iv, 0, (int)count);
break;
}
else
{
dOut.Write(iv, 0, iv.Length);
count -= iv.Length;
}
if (count < pBytes.Length)
{
dOut.Write(pBytes, 0, (int)count);
count = 0;
}
else
{
dOut.Write(pBytes, 0, pBytes.Length);
count -= pBytes.Length;
}
}
break;
default:
throw new PgpException("unknown S2K type: " + s2k.Type);
}
}
else
{
for (int i = 0; i != loopCount; i++)
{
dOut.WriteByte((byte)0);
}
dOut.Write(pBytes, 0, pBytes.Length);
}
dOut.Close();
byte[] dig = digestCalculator.GetResult().Collect();
if (dig.Length > (keyBytes.Length - generatedBytes))
{
Array.Copy(dig, 0, keyBytes, generatedBytes, keyBytes.Length - generatedBytes);
}
else
{
Array.Copy(dig, 0, keyBytes, generatedBytes, dig.Length);
}
generatedBytes += dig.Length;
loopCount++;
}
}
catch (IOException e)
{
throw new PgpException("exception calculating digest: " + e.Message, e);
}
for (int i = 0; i != pBytes.Length; i++)
{
pBytes[i] = 0;
}
return(keyBytes);
}
internal static KeyParameter DoMakeKeyFromPassPhrase(SymmetricKeyAlgorithmTag algorithm, S2k s2k, byte[] rawPassPhrase, bool clearPassPhrase)
{
int keySize = GetKeySize(algorithm);
byte[] array = new byte[(keySize + 7) / 8];
int num = 0;
int num2 = 0;
while (num < array.Length)
{
IDigest digest;
if (s2k != null)
{
string digestName = GetDigestName(s2k.HashAlgorithm);
try
{
digest = DigestUtilities.GetDigest(digestName);
}
catch (global::System.Exception exception)
{
throw new PgpException("can't find S2k digest", exception);
}
for (int i = 0; i != num2; i++)
{
digest.Update(0);
}
byte[] iV = s2k.GetIV();
switch (s2k.Type)
{
case 0:
digest.BlockUpdate(rawPassPhrase, 0, rawPassPhrase.Length);
break;
case 1:
digest.BlockUpdate(iV, 0, iV.Length);
digest.BlockUpdate(rawPassPhrase, 0, rawPassPhrase.Length);
break;
case 3:
{
long iterationCount = s2k.IterationCount;
digest.BlockUpdate(iV, 0, iV.Length);
digest.BlockUpdate(rawPassPhrase, 0, rawPassPhrase.Length);
iterationCount -= iV.Length + rawPassPhrase.Length;
while (iterationCount > 0)
{
if (iterationCount < iV.Length)
{
digest.BlockUpdate(iV, 0, (int)iterationCount);
break;
}
digest.BlockUpdate(iV, 0, iV.Length);
iterationCount -= iV.Length;
if (iterationCount < rawPassPhrase.Length)
{
digest.BlockUpdate(rawPassPhrase, 0, (int)iterationCount);
iterationCount = 0L;
}
else
{
digest.BlockUpdate(rawPassPhrase, 0, rawPassPhrase.Length);
iterationCount -= rawPassPhrase.Length;
}
}
break;
}
default:
throw new PgpException(string.Concat((object)"unknown S2k type: ", (object)s2k.Type));
}
}
else
{
try
{
digest = DigestUtilities.GetDigest("MD5");
for (int j = 0; j != num2; j++)
{
digest.Update(0);
}
digest.BlockUpdate(rawPassPhrase, 0, rawPassPhrase.Length);
}
catch (global::System.Exception exception2)
{
throw new PgpException("can't find MD5 digest", exception2);
}
}
byte[] array2 = DigestUtilities.DoFinal(digest);
if (array2.Length > array.Length - num)
{
global::System.Array.Copy((global::System.Array)array2, 0, (global::System.Array)array, num, array.Length - num);
}
else
{
global::System.Array.Copy((global::System.Array)array2, 0, (global::System.Array)array, num, array2.Length);
}
num += array2.Length;
num2++;
}
if (clearPassPhrase && rawPassPhrase != null)
{
global::System.Array.Clear((global::System.Array)rawPassPhrase, 0, rawPassPhrase.Length);
}
return(MakeKey(algorithm, array));
}
