Python ctypes.wintypes 模块，BYTE 实例源码

def encrypt(data, non_interactive=0):
    blobin = DATA_BLOB(cbData=len(data),
                       pbData=cast(c_char_p(data),
                                   POINTER(wintypes.BYTE)))
    blobout = DATA_BLOB()

    if not CryptProtectData(byref(blobin),
                            u('python-keyring-lib.win32crypto'),
                            None, None, None,
                            CRYPTPROTECT_UI_FORBIDDEN,
                            byref(blobout)):
        raise OSError("Can't encrypt")

    encrypted = create_string_buffer(blobout.cbData)
    memmove(encrypted, blobout.pbData, blobout.cbData)
    windll.kernel32.LocalFree(blobout.pbData)
    return encrypted.raw

def decrypt(encrypted, non_interactive=0):
    blobin = DATA_BLOB(cbData=len(encrypted),
                       pbData=cast(c_char_p(encrypted),
                                   POINTER(wintypes.BYTE)))
    blobout = DATA_BLOB()

    if not CryptUnprotectData(byref(blobin),
                              u('python-keyring-lib.win32crypto'),
                              None, None, None,
                              CRYPTPROTECT_UI_FORBIDDEN,
                              byref(blobout)):
        raise OSError("Can't decrypt")

    data = create_string_buffer(blobout.cbData)
    memmove(data, blobout.pbData, blobout.cbData)
    windll.kernel32.LocalFree(blobout.pbData)
    return data.raw

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE * length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()

def byte_buffer(length):
    """Get a buffer for a string"""
    return (BYTE*length)()