Add Python interfacing example

Signed-off-by: Szczepan Zalega <szczepan@nitrokey.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/python_bindings_example.py b/python_bindings_example.py
new file mode 100755
index 0000000..a690874
--- /dev/null
+++ b/python_bindings_example.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+import cffi
+
+ffi = cffi.FFI()
+get_string = ffi.string
+
+
+def get_library():
+    fp = 'NK_C_API.h'  # path to C API header
+
+    declarations = []
+    with open(fp, 'r') as f:
+        declarations = f.readlines()
+
+    for declaration in declarations:
+        if 'extern' in declaration and not '"C"' in declaration:
+            declaration = declaration.replace('extern', '').strip()
+            # print(declaration)
+            ffi.cdef(declaration)
+
+    C = ffi.dlopen("build/libnitrokey.so")  # path to built library
+    return C
+
+
+def get_hotp_code(lib, i):
+    return lib.NK_get_hotp_code(i)
+
+
+libnitrokey = get_library()
+libnitrokey.NK_set_debug(False)  # do not show debug messages
+
+libnitrokey.NK_login('P')  # connect to Nitrokey Pro device
+hotp_slot_1_code = get_hotp_code(libnitrokey, 1)
+print('Getting HOTP code from Nitrokey Pro: ')
+print(hotp_slot_1_code)
+libnitrokey.NK_logout()  # disconnect device
+
+libnitrokey.NK_login('S')  # connect to Nitrokey Storage device
+hotp_slot_1_code_nitrokey_storage = get_hotp_code(libnitrokey, 1)
+print('Getting HOTP code from Nitrokey Storage: ')
+print(hotp_slot_1_code_nitrokey_storage)
+libnitrokey.NK_logout()  # disconnect device