/// <summary>
/// Constructs the object with string key, returning any intended exception as a string.
/// </summary>
private string constructWithKey(string key, bool compressed)
{
byte[] hex = Util.Base58CheckToByteArray(key);
if (hex == null)
{
hex = Util.HexStringToBytes(key, true);
if (hex == null)
{
// tolerate a minikey
if (MiniKeyPair.IsValidMiniKey(key) > 0)
{
PrivateKeyBytes = new MiniKeyPair(key).PrivateKeyBytes;
return(null);
}
else
{
return("Invalid private key");
}
}
}
if (hex.Length == 32)
{
_privKey = new byte[32];
Array.Copy(hex, 0, _privKey, 0, 32);
IsCompressedPoint = compressed;
}
else if (hex.Length == 33 && hex[0] == 0x80)
{
// normal private key
_privKey = new byte[32];
Array.Copy(hex, 1, _privKey, 0, 32);
IsCompressedPoint = false;
}
else if (hex.Length == 34 && hex[0] == 0x80 && hex[33] == 0x01)
{
// compressed private key
_privKey = new byte[32];
Array.Copy(hex, 1, _privKey, 0, 32);
IsCompressedPoint = true;
}
else if (key.StartsWith("6"))
{
return("Key is encrypted, decrypt first.");
}
else
{
return("Not a recognized private key format");
}
return(validateRange());
}
public static bool PassphraseTooSimple(string passphrase)
{
int Lowercase = 0, Uppercase = 0, Numbers = 0, Symbols = 0, Spaces = 0;
foreach (char c in passphrase.ToCharArray())
{
if (c >= 'a' && c <= 'z')
{
Lowercase++;
}
else if (c >= 'A' && c <= 'Z')
{
Uppercase++;
}
else if (c >= '0' && c <= '9')
{
Numbers++;
}
else if (c == ' ')
{
Spaces++;
}
else
{
Symbols++;
}
}
// let mini private keys through - they won't contain words, they are nonsense characters, so their entropy is a bit better per character
if (MiniKeyPair.IsValidMiniKey(passphrase) != 1)
{
return(false);
}
if (passphrase.Length < 30 && (Lowercase < 10 || Uppercase < 3 || Numbers < 2 || Symbols < 2))
{
return(true);
}
return(false);
}
/// <summary>
/// Interprets a string to automatically detect a type of Bitcoin-related object.
/// compressed and addresstype are only considered when the object doesn't define these itself.
/// </summary>
public static object Interpret(string what, bool compressed = false, byte addressType = 36) //GRS
{
if (what == null)
{
return(null);
}
what = what.Trim();
// Is the string interpretable as base58?
byte[] hex = Util.Base58CheckToByteArray(what);
if (hex != null)
{
try {
switch (hex.Length)
{
case 21:
// It's an address of some sort.
return(new AddressBase(what));
case 31:
case 32:
case 33:
case 34:
// Unencrypted private key
return(new KeyPair(what));
case 36:
// these pairs aren't decided by length alone,
// but the constructors will throw an exception if they
// don't contain valid key material.
return(new ShaPassphraseKeyPair(what));
case 39:
return(new Bip38KeyPair(what));
case 49:
return(new Bip38Intermediate(what, Bip38Intermediate.Interpretation.IntermediateCode));
case 51:
return(new Bip38Confirmation(what));
}
} catch {}
// If a constructor didn't like something, then don't return anything.
}
hex = Util.HexStringToBytes(what, true);
if (hex != null)
{
try {
switch (hex.Length)
{
case 33:
case 65:
return(new PublicKey(hex));
case 20:
return(new AddressBase(hex, addressType));
case 21: // hash160
return(new AddressBase(hex));
case 30:
case 31:
case 32:
return(new KeyPair(hex, compressed: compressed, addressType: addressType));
}
} catch { }
}
if (MiniKeyPair.IsValidMiniKey(what) == 1)
{
return(new MiniKeyPair(what));
}
return(null);
}
/// <summary>
/// Constructs the object with string key, returning any intended exception as a string.
/// </summary>
private string constructWithKey(string key, bool compressed)
{
byte[] hex = Util.Base58CheckToByteArray(key);
if (hex == null) {
hex = Util.HexStringToBytes(key, true);
if (hex == null) {
// tolerate a minikey
if (MiniKeyPair.IsValidMiniKey(key) > 0) {
PrivateKeyBytes = new MiniKeyPair(key, AddressType).PrivateKeyBytes;
return null;
} else {
return "Invalid private key";
}
}
}
if (hex.Length == 32) {
_privKey = new byte[32];
Array.Copy(hex, 0, _privKey, 0, 32);
IsCompressedPoint = compressed;
} else if (hex.Length == 33 && hex[0] == Bitcoin.AddressType.ToPrivateKeyPrefix(AddressType)) {
// normal private key
_privKey = new byte[32];
Array.Copy(hex, 1, _privKey, 0, 32);
IsCompressedPoint = false;
} else if (hex.Length == 34 && hex[0] == Bitcoin.AddressType.ToPrivateKeyPrefix(AddressType) && hex[33] == 0x01) {
// compressed private key
_privKey = new byte[32];
Array.Copy(hex, 1, _privKey, 0, 32);
IsCompressedPoint = true;
} else if (key.StartsWith("6")) {
return "Key is encrypted, decrypt first.";
} else {
return "Not a recognized private key format";
}
return validateRange();
}