private static void ReleaseItemRef(ref IntPtr itemRef)
{
if (itemRef != IntPtr.Zero)
{
MacNativeMethods.CFRelease(itemRef);
itemRef = IntPtr.Zero;
}
}
private static void ReleaseValuePtr(ref IntPtr valuePtr)
{
if (valuePtr != IntPtr.Zero)
{
MacNativeMethods.SecKeychainItemFreeContent(attrList: IntPtr.Zero, data: valuePtr);
valuePtr = IntPtr.Zero;
}
}
/// <summary>
/// Deletes the key specified by given service and account names.
/// </summary>
/// <param name="serviceName">Service name.</param>
/// <param name="accountName">Account name.</param>
public static void DeleteKey(string serviceName, string accountName)
{
IntPtr itemRef = IntPtr.Zero;
IntPtr valuePtr = IntPtr.Zero;
try
{
// check if the key exists
int status = MacNativeMethods.SecKeychainFindGenericPassword(
keychainOrArray: IntPtr.Zero,
serviceNameLength: (uint)serviceName.Length,
serviceName: serviceName,
accountNameLength: (uint)accountName.Length,
accountName: accountName,
passwordLength: out uint valueLength,
passwordData: out valuePtr,
itemRef: out itemRef);
if (status == MacNativeMethods.errSecItemNotFound)
{
return;
}
if (status != MacNativeMethods.errSecSuccess)
{
throw new Exception(string.Format(CultureInfo.CurrentCulture, Constants.MacKeyChainFindFailed, status));
}
if (itemRef == IntPtr.Zero)
{
return;
}
// key exists so delete it
status = MacNativeMethods.SecKeychainItemDelete(itemRef);
if (status != MacNativeMethods.errSecSuccess)
{
throw new Exception(string.Format(CultureInfo.CurrentCulture, Constants.MacKeyChainDeleteFailed, status));
}
}
finally
{
ReleaseItemRefAndValuePtr(ref itemRef, ref valuePtr);
}
}
/// <summary>
/// Writes specifies vaue for given service and account names.
/// </summary>
/// <param name="serviceName">Service name.</param>
/// <param name="accountName">Account name.</param>
/// <param name="value">Value.</param>
public static void WriteKey(string serviceName, string accountName, byte[] value)
{
IntPtr itemRef = IntPtr.Zero;
IntPtr valuePtr = IntPtr.Zero;
try
{
// check if the key already exists
int status = MacNativeMethods.SecKeychainFindGenericPassword(
keychainOrArray: IntPtr.Zero,
serviceNameLength: (uint)serviceName.Length,
serviceName: serviceName,
accountNameLength: (uint)accountName.Length,
accountName: accountName,
passwordLength: out uint valueLength,
passwordData: out valuePtr,
itemRef: out itemRef);
if (status != MacNativeMethods.errSecSuccess &&
status != MacNativeMethods.errSecItemNotFound)
{
throw new Exception(string.Format(CultureInfo.CurrentCulture, Constants.MacKeyChainFindFailed, status));
}
if (itemRef != IntPtr.Zero)
{
// key already exists so update it
status = MacNativeMethods.SecKeychainItemModifyAttributesAndData(
itemRef: itemRef,
attrList: IntPtr.Zero,
length: (uint)value.Length,
data: value);
if (status != MacNativeMethods.errSecSuccess)
{
throw new Exception(string.Format(CultureInfo.CurrentCulture, Constants.MacKeyChainUpdateFailed, status));
}
}
else
{
// key doesn't exist. add key value data
status = MacNativeMethods.SecKeychainAddGenericPassword(
keychain: IntPtr.Zero,
serviceNameLength: (uint)serviceName.Length,
serviceName: serviceName,
accountNameLength: (uint)accountName.Length,
accountName: accountName,
passwordLength: (uint)value.Length,
passwordData: value,
itemRef: out itemRef);
if (status != MacNativeMethods.errSecSuccess)
{
throw new Exception(string.Format(CultureInfo.CurrentCulture, Constants.MacKeyChainInsertFailed, status));
}
}
}
finally
{
ReleaseItemRefAndValuePtr(ref itemRef, ref valuePtr);
}
}