python - How to serialize/store the ciphertext encrypted by hybrid CPabe_BSW07 in Charm -


i want store ciphertext encrypted hybrid cpabe_bsw07 in files, found errors when pickling ciphertext:

 raise typeerror, "can't pickle %s objects" % base.__name__ typeerror: can't pickle element objects 
from charm.toolbox.pairinggroup import pairinggroup charm.schemes.abenc.abenc_bsw07 import cpabe_bsw07 charm.adapters.abenc_adapt_hybrid import hybridabenc import pickle   if __name__ == "__main__":   groupobj = pairinggroup('ss512')   cpabe = cpabe_bsw07(groupobj)   hyb_abe = hybridabenc(cpabe, groupobj)   (pk, mk) = hyb_abe.setup()   access_policy = '((four or three) , (two or one))'   sk = hyb_abe.keygen(pk, mk, ['one', 'two', 'three'])    sourcefile = open("source.dat", 'rb')   plaintext = sourcefile.read()   sourcefile.close()    encryptedfile = open("encrypted.dat", 'wb')   ciphertext = hyb_abe.encrypt(pk, plaintext, access_policy)   pickle.dump(ciphertext, encryptedfile)   encryptedfile.close()

hahaha, know how solve now:

from charm.toolbox.pairinggroup import pairinggroup charm.schemes.abenc.abenc_bsw07 import cpabe_bsw07 charm.adapters.abenc_adapt_hybrid import hybridabenc import pickle  if __name__ == "__main__":   groupobj = pairinggroup('ss512')   cpabe = cpabe_bsw07(groupobj)   hyb_abe = hybridabenc(cpabe, groupobj)   (pk, mk) = hyb_abe.setup()   access_policy = '((four or three) , (two or one))'   sk = hyb_abe.keygen(pk, mk, ['one', 'two', 'three'])    sourcefile = open("source.dat", 'rb')   plaintext = sourcefile.read()   sourcefile.close()    encryptedfile = open("encrypted.dat", 'wb')   ciphertext = hyb_abe.encrypt(pk, plaintext, access_policy)   ciphertext["c1"]["c"] = groupobj.serialize(ciphertext["c1"]["c"])   key in ciphertext["c1"]["cy"] :       ciphertext["c1"]["cy"][key] = groupobj.serialize(ciphertext["c1"]["cy"][key])   ciphertext["c1"]["c_tilde"] = groupobj.serialize(ciphertext["c1"]["c_tilde"])   key in ciphertext["c1"]["cyp"] :     ciphertext["c1"]["cyp"][key] = groupobj.serialize(ciphertext["c1"]["cyp"][key])   pickle.dump(ciphertext, encryptedfile)   encryptedfile.close()    encryptedfile = open("encrypted.dat", 'rb')   ciphertext2 = pickle.load(encryptedfile)   ciphertext2["c1"]["c"] = groupobj.deserialize(ciphertext2["c1"]["c"])   key in ciphertext2["c1"]["cy"]:     ciphertext2["c1"]["cy"][key] = groupobj.deserialize(ciphertext2["c1"]["cy"][key])   ciphertext2["c1"]["c_tilde"] = groupobj.deserialize(ciphertext2["c1"]["c_tilde"])   key in ciphertext2["c1"]["cyp"]:     ciphertext2["c1"]["cyp"][key] = groupobj.deserialize(ciphertext2["c1"]["cyp"][key])   print hyb_abe.decrypt(pk, sk, ciphertext2) == plaintext   encryptedfile.close()

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