public IEnumerable <SecureData> EnumerateSecureData(string prefix)
{
string filter = prefix ?? string.Empty + "*";
if (NativeMethods.CredEnumerate(filter, 0, out int count, out IntPtr credentialArrayPtr))
{
Trace.WriteLine($"{count} credentials enumerated from secret store.");
try
{
for (int i = 0; i < count; i += 1)
{
int offset = i * Marshal.SizeOf(typeof(IntPtr));
IntPtr credentialPtr = Marshal.ReadIntPtr(credentialArrayPtr, offset);
if (credentialPtr != IntPtr.Zero)
{
NativeMethods.Credential credStruct = Marshal.PtrToStructure <NativeMethods.Credential>(credentialPtr);
int passwordLength = credStruct.CredentialBlobSize;
byte[] data = new byte[credStruct.CredentialBlobSize];
Marshal.Copy(credStruct.CredentialBlob, data, 0, credStruct.CredentialBlobSize);
string name = credStruct.UserName ?? string.Empty;
string key = credStruct.TargetName;
yield return(new SecureData(key, name, data));
}
}
}
finally
{
NativeMethods.CredFree(credentialArrayPtr);
}
}
protected void PurgeCredentials(string @namespace)
{
string filter = @namespace + "*";
int count;
IntPtr credentialArrayPtr;
if (NativeMethods.CredEnumerate(filter, 0, out count, out credentialArrayPtr))
{
for (int i = 0; i < count; i += 1)
{
int offset = i * Marshal.SizeOf(typeof(IntPtr));
IntPtr credentialPtr = Marshal.ReadIntPtr(credentialArrayPtr, offset);
if (credentialPtr != IntPtr.Zero)
{
NativeMethods.Credential credential = Marshal.PtrToStructure <NativeMethods.Credential>(credentialPtr);
if (!NativeMethods.CredDelete(credential.TargetName, credential.Type, 0))
{
int error = Marshal.GetLastWin32Error();
Debug.Fail("Failed with error code " + error.ToString("X"));
}
}
}
NativeMethods.CredFree(credentialArrayPtr);
}
else
{
int error = Marshal.GetLastWin32Error();
Debug.Fail("Failed with error code " + error.ToString("X"));
}
}
protected void WriteCredential(string targetName, Credential credentials)
{
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
CredentialBlob = Marshal.StringToCoTaskMemUni(credentials.Password),
CredentialBlobSize = (uint)Encoding.Unicode.GetByteCount(credentials.Password),
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = credentials.Username,
};
try
{
if (!NativeMethods.CredWrite(ref credential, 0))
{
int errorCode = Marshal.GetLastWin32Error();
throw new Exception("Failed to write credentials", new Win32Exception(errorCode));
}
Git.Trace.WriteLine($"credentials for '{targetName}' written to store.");
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(credential.CredentialBlob);
}
}
}
protected Credential ReadCredentials(string targetName)
{
Credential credentials = null;
IntPtr credPtr = IntPtr.Zero;
try
{
if (NativeMethods.CredRead(targetName, NativeMethods.CredentialType.Generic, 0, out credPtr))
{
NativeMethods.Credential credStruct = (NativeMethods.Credential)Marshal.PtrToStructure(credPtr, typeof(NativeMethods.Credential));
int passwordLength = (int)credStruct.CredentialBlobSize;
string password = passwordLength > 0
? Marshal.PtrToStringUni(credStruct.CredentialBlob, passwordLength / sizeof(char))
: String.Empty;
string username = credStruct.UserName ?? String.Empty;
credentials = new Credential(username, password);
Git.Trace.WriteLine($"credentials for '{targetName}' read from store.");
}
}
finally
{
if (credPtr != IntPtr.Zero)
{
NativeMethods.CredFree(credPtr);
}
}
return(credentials);
}
protected void WriteCredential(string targetName, Credential credentials)
{
Trace.WriteLine("BaseSecureStore::WriteCredential");
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = credentials.Username,
};
try
{
// https://msdn.microsoft.com/en-us/library/gg309393.aspx
credential.CredentialBlob = Marshal.SecureStringToCoTaskMemUnicode(credentials.Password);
// See calculation in http://referencesource.microsoft.com/#mscorlib/system/security/securestring.cs,eab10308ba549df3
credential.CredentialBlobSize = (uint)(credentials.Password.Length + 1 /*null terminator*/) * 2 /*Unicode encoding*/;
if (!NativeMethods.CredWrite(ref credential, 0))
{
int errorCode = Marshal.GetLastWin32Error();
Trace.WriteLine("BaseSecureStore::WriteCredential Failed to write credentials, error code " + errorCode);
}
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.ZeroFreeCoTaskMemUnicode(credential.CredentialBlob);
}
}
}
protected bool WriteToken(string targetName, Token token)
{
if (ReferenceEquals(targetName, null))
{
throw new ArgumentNullException(nameof(targetName));
}
if (ReferenceEquals(token, null))
{
throw new ArgumentNullException(nameof(token));
}
byte[] bytes = null;
if (Token.Serialize(token, out bytes))
{
string name;
if (Token.GetFriendlyNameFromType(token.Type, out name))
{
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
CredentialBlobSize = (uint)bytes.Length,
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = name,
};
try
{
credential.CredentialBlob = Marshal.AllocCoTaskMem(bytes.Length);
Marshal.Copy(bytes, 0, credential.CredentialBlob, bytes.Length);
if (!NativeMethods.CredWrite(ref credential, 0))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Failed to write credentials");
}
Git.Trace.WriteLine($"token for '{targetName}' written to store.");
}
catch (Exception exception)
{
Debug.WriteLine(exception);
Git.Trace.WriteLine($"failed to write credentials: {exception.GetType().Name}.");
return(false);
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(credential.CredentialBlob);
}
}
}
}
return(true);
}
protected bool WriteCredential(string targetName, Credential credentials)
{
if (ReferenceEquals(targetName, null))
{
throw new ArgumentNullException(nameof(targetName));
}
if (ReferenceEquals(credentials, null))
{
throw new ArgumentNullException(nameof(credentials));
}
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
CredentialBlob = Marshal.StringToCoTaskMemUni(credentials.Password),
CredentialBlobSize = (uint)Encoding.Unicode.GetByteCount(credentials.Password),
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = credentials.Username,
};
try
{
if (!NativeMethods.CredWrite(ref credential, 0))
{
int error = Marshal.GetLastWin32Error();
throw new Win32Exception(error, "Failed to write credentials");
}
Git.Trace.WriteLine($"credentials for '{targetName}' written to store.");
}
catch (Exception exception)
{
Debug.WriteLine(exception);
Git.Trace.WriteLine($"failed to write credentials: {exception.GetType().Name}.");
return(false);
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(credential.CredentialBlob);
}
}
return(true);
}
protected void WriteToken(string targetName, Token token)
{
Trace.WriteLine("BaseSecureStore::WriteToken");
byte[] bytes = null;
if (!Token.Serialize(token, out bytes))
{
return;
}
string name;
if (!Token.GetFriendlyNameFromType(token.Type, out name))
{
return;
}
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
CredentialBlobSize = (uint)bytes.Length,
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = name,
};
try
{
credential.CredentialBlob = Marshal.AllocCoTaskMem(bytes.Length);
Marshal.Copy(bytes, 0, credential.CredentialBlob, bytes.Length);
if (!NativeMethods.CredWrite(ref credential, 0))
{
int errorCode = Marshal.GetLastWin32Error();
Trace.WriteLine("BaseSecureStore::WriteToken Failed to write credentials, error code " + errorCode);
}
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.ZeroFreeCoTaskMemUnicode(credential.CredentialBlob);
}
}
}
protected Token ReadToken(string targetName)
{
Token token = null;
IntPtr credPtr = IntPtr.Zero;
try
{
if (NativeMethods.CredRead(targetName, NativeMethods.CredentialType.Generic, 0, out credPtr))
{
NativeMethods.Credential credStruct = (NativeMethods.Credential)Marshal.PtrToStructure(credPtr, typeof(NativeMethods.Credential));
if (credStruct.CredentialBlob != null && credStruct.CredentialBlobSize > 0)
{
int size = (int)credStruct.CredentialBlobSize;
byte[] bytes = new byte[size];
Marshal.Copy(credStruct.CredentialBlob, bytes, 0, size);
TokenType type;
if (Token.GetTypeFromFriendlyName(credStruct.UserName, out type))
{
Token.Deserialize(bytes, type, out token);
}
Git.Trace.WriteLine($"token for '{targetName}' read from store.");
}
}
}
catch (Exception exception)
{
Debug.WriteLine(exception);
Git.Trace.WriteLine($"failed to read credentials: {exception.GetType().Name}.");
return(null);
}
finally
{
if (credPtr != IntPtr.Zero)
{
NativeMethods.CredFree(credPtr);
}
}
return(token);
}
protected Credential ReadCredentials(string targetName)
{
Trace.WriteLine("BaseSecureStore::ReadCredentials");
Credential credentials = null;
IntPtr credPtr = IntPtr.Zero;
try
{
if (!NativeMethods.CredRead(targetName, NativeMethods.CredentialType.Generic, 0, out credPtr))
{
return(null);
}
NativeMethods.Credential credStruct = (NativeMethods.Credential)Marshal.PtrToStructure(credPtr, typeof(NativeMethods.Credential));
// https://msdn.microsoft.com/en-us/library/gg309393.aspx
int size = (int)credStruct.CredentialBlobSize;
SecureString pwd = null;
if (size != 0)
{
byte[] bpassword = new byte[size];
Marshal.Copy(credStruct.CredentialBlob, bpassword, 0, size);
char[] chars = Encoding.Unicode.GetChars(bpassword);
pwd = ConvertToSecureString(chars);
Array.Clear(chars, 0, chars.Length);
Array.Clear(bpassword, 0, bpassword.Length);
}
credentials = new Credential(credStruct.UserName, pwd);
}
finally
{
if (credPtr != IntPtr.Zero)
{
NativeMethods.CredFree(credPtr);
}
}
return(credentials);
}
protected void WriteToken(string targetName, Token token)
{
byte[] bytes = null;
if (Token.Serialize(token, out bytes))
{
string name;
if (Token.GetFriendlyNameFromType(token.Type, out name))
{
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
CredentialBlobSize = (uint)bytes.Length,
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = name,
};
try
{
credential.CredentialBlob = Marshal.AllocCoTaskMem(bytes.Length);
Marshal.Copy(bytes, 0, credential.CredentialBlob, bytes.Length);
if (!NativeMethods.CredWrite(ref credential, 0))
{
int errorCode = Marshal.GetLastWin32Error();
throw new Exception("Failed to write credentials", new Win32Exception(errorCode));
}
Git.Trace.WriteLine($"token for '{targetName}' written to store.");
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(credential.CredentialBlob);
}
}
}
}
}
protected Token ReadToken(string targetName)
{
Trace.WriteLine("BaseSecureStore::ReadToken");
Token token = null;
IntPtr credPtr = IntPtr.Zero;
try
{
if (!NativeMethods.CredRead(targetName, NativeMethods.CredentialType.Generic, 0, out credPtr))
{
return(null);
}
NativeMethods.Credential credStruct = (NativeMethods.Credential)Marshal.PtrToStructure(credPtr, typeof(NativeMethods.Credential));
if (credStruct.CredentialBlob == null || credStruct.CredentialBlobSize <= 0)
{
return(null);
}
int size = (int)credStruct.CredentialBlobSize;
byte[] bytes = new byte[size];
Marshal.Copy(credStruct.CredentialBlob, bytes, 0, size);
TokenType type;
if (Token.GetTypeFromFriendlyName(credStruct.UserName, out type))
{
Token.Deserialize(bytes, type, out token);
}
}
finally
{
if (credPtr != IntPtr.Zero)
{
NativeMethods.CredFree(credPtr);
}
}
return(token);
}
protected IEnumerable <Secret> EnumerateCredentials(string @namespace)
{
string filter = @namespace ?? string.Empty + "*";
if (NativeMethods.CredEnumerate(filter, 0, out int count, out IntPtr credentialArrayPtr))
{
Trace.WriteLine($"{count} credentials enumerated from secret store.");
try
{
for (int i = 0; i < count; i += 1)
{
int offset = i * Marshal.SizeOf(typeof(IntPtr));
IntPtr credentialPtr = Marshal.ReadIntPtr(credentialArrayPtr, offset);
if (credentialPtr != IntPtr.Zero)
{
NativeMethods.Credential credStruct = Marshal.PtrToStructure <NativeMethods.Credential>(credentialPtr);
int passwordLength = (int)credStruct.CredentialBlobSize;
string password = passwordLength > 0
? Marshal.PtrToStringUni(credStruct.CredentialBlob, passwordLength / sizeof(char))
: string.Empty;
string username = credStruct.UserName ?? string.Empty;
var credentials = new Credential(username, password);
yield return(credentials);
}
}
}
finally
{
NativeMethods.CredFree(credentialArrayPtr);
}
}
protected void WriteToken(string targetName, Token token)
{
byte[] bytes = null;
if (Token.Serialize(token, out bytes))
{
string name;
if (Token.GetFriendlyNameFromType(token.Type, out name))
{
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
CredentialBlobSize = (uint)bytes.Length,
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = name,
};
try
{
credential.CredentialBlob = Marshal.AllocCoTaskMem(bytes.Length);
Marshal.Copy(bytes, 0, credential.CredentialBlob, bytes.Length);
if (!NativeMethods.CredWrite(ref credential, 0))
{
int errorCode = Marshal.GetLastWin32Error();
throw new Exception("Failed to write credentials", new Win32Exception(errorCode));
}
Git.Trace.WriteLine($"token for '{targetName}' written to store.");
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(credential.CredentialBlob);
}
}
}
}
}
protected void WriteCredential(string targetName, Credential credentials)
{
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
CredentialBlob = Marshal.StringToCoTaskMemUni(credentials.Password),
CredentialBlobSize = (uint)Encoding.Unicode.GetByteCount(credentials.Password),
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = credentials.Username,
};
try
{
if (!NativeMethods.CredWrite(ref credential, 0))
{
int errorCode = Marshal.GetLastWin32Error();
throw new Exception("Failed to write credentials", new Win32Exception(errorCode));
}
Git.Trace.WriteLine($"credentials for '{targetName}' written to store.");
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(credential.CredentialBlob);
}
}
}
protected void WriteCredential(string targetName, Credential credentials)
{
Trace.WriteLine("BaseSecureStore::WriteCredential");
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = credentials.Username,
};
try
{
// https://msdn.microsoft.com/en-us/library/gg309393.aspx
credential.CredentialBlob = Marshal.SecureStringToCoTaskMemUnicode(credentials.Password);
// See calculation in http://referencesource.microsoft.com/#mscorlib/system/security/securestring.cs,eab10308ba549df3
credential.CredentialBlobSize = (uint)(credentials.Password.Length + 1 /*null terminator*/) * 2 /*unicode encoding*/;
if (!NativeMethods.CredWrite(ref credential, 0))
{
int errorCode = Marshal.GetLastWin32Error();
Trace.WriteLine("BaseSecureStore::WriteCredential Failed to write credentials, error code " + errorCode);
}
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.ZeroFreeCoTaskMemUnicode(credential.CredentialBlob);
}
}
}
protected void WriteToken(string targetName, Token token)
{
Trace.WriteLine("BaseSecureStore::WriteToken");
byte[] bytes = null;
if (Token.Serialize(token, out bytes))
{
string name;
if (Token.GetFriendlyNameFromType(token.Type, out name))
{
NativeMethods.Credential credential = new NativeMethods.Credential()
{
Type = NativeMethods.CredentialType.Generic,
TargetName = targetName,
CredentialBlobSize = (uint)bytes.Length,
Persist = NativeMethods.CredentialPersist.LocalMachine,
AttributeCount = 0,
UserName = name,
};
try
{
credential.CredentialBlob = Marshal.AllocCoTaskMem(bytes.Length);
Marshal.Copy(bytes, 0, credential.CredentialBlob, bytes.Length);
if (!NativeMethods.CredWrite(ref credential, 0))
{
int errorCode = Marshal.GetLastWin32Error();
Trace.WriteLine("BaseSecureStore::WriteToken Failed to write credentials, error code " + errorCode);
}
}
finally
{
if (credential.CredentialBlob != IntPtr.Zero)
{
Marshal.ZeroFreeCoTaskMemUnicode(credential.CredentialBlob);
}
}
}
}
}
