def decrypt(self, master_public_key, sk, cipher_matrix, vertices):
'''
Decryption requires master_public_key, user secret key, and cipher
'''
group = PairingGroup('SS512')
cpabe = CPabe_BSW07(group)
hyb_abe = HybridABEnc(cpabe, group)
N = len(vertices)
resMat = [None] * N
for i in range(0, N):
resMat[i] = [None] * N
for j in range(0, N):
#convert to lower case
s = vertices[i].lower()
s2 = vertices[j].lower()
cipher = cipher_matrix.get_cell_by_symbol(s, s2)
resMat[i][j] = hyb_abe.decrypt(master_public_key, sk, cipher)
if resMat[i][j] == False:
return False
result = AdjMatrixDiGraph(mat=resMat)
return SymbolDiGraphMat(vertices, G=result)
def testKPABE_dk(nodes, E, P):
sg = SymbolDiGraphMat(nodes, rand_E=E)
#print nodes
abe_graph = KPABESymbolDiGraph(sg)
abe_graph.setup()
dk = abe_graph.key_generation(P)
return len(str(dk))
def testCPABE_subgraph_size(nodes, E, vertices):
sg = SymbolDiGraphMat(nodes, rand_E=E)
abe_graph = CPABESymbolDiGraph(sg)
abe_graph.setup()
encMat = abe_graph.encrypt()
return len(str(abe_graph.subgraph(encMat, vertices)))
def testKPABE_keygen(nodes, E, policy):
sg = SymbolDiGraphMat(nodes, rand_E=E)
abe_graph = KPABESymbolDiGraph(sg)
abe_graph.setup()
t0 = time.clock()
abe_graph.key_generation(policy)
t1 = time.clock()
return t1-t0
def testCPABE_keygen(nodes, E, attributes):
sg = SymbolDiGraphMat(nodes, rand_E=E)
abe_graph = CPABESymbolDiGraph(sg)
abe_graph.setup()
t0 = time.clock()
abe_graph.key_generation(attributes)
t1 = time.clock()
return t1-t0
def testKPABE_enc(nodes, E):
sg = SymbolDiGraphMat(nodes, rand_E=E)
abe_graph = KPABESymbolDiGraph(sg)
abe_graph.setup()
t0 = time.clock()
abe_graph.encrypt()
t1 = time.clock()
return t1-t0
def testKPABE_subgraph(nodes, E, vertices):
sg = SymbolDiGraphMat(nodes, rand_E=E)
abe_graph = KPABESymbolDiGraph(sg)
abe_graph.setup()
encMat = abe_graph.encrypt()
t0 = time.clock()
abe_graph.subgraph(encMat, vertices)
t1 = time.clock()
return t1-t0
return enc_symbol_matix
def out_to_file(self, filename):
pass
def read_from_file(self, filename):
pass
if __name__ == '__main__':
'''Owner side'''
nodes = []
for i in xrange(0, 4):
nodes.append('v%d' % (i + 1))
sg = SymbolDiGraphMat(nodes, rand_E=10)
print sg
#encrypt graph
abe_graph = CPABESymbolDiGraph(sg)
t0 = time.clock()
abe_graph.setup()
t1 = time.clock()
encMat = abe_graph.encrypt()
t2 = time.clock()
print encMat
#bob needs to query graph
def testCPABE_dk(nodes, E, A):
sg = SymbolDiGraphMat(nodes, rand_E=E)
abe_graph = CPABESymbolDiGraph(sg)
abe_graph.setup()
dk = abe_graph.key_generation(A)
return len(str(dk))
def testKPABE_pp(nodes, E):
sg = SymbolDiGraphMat(nodes, rand_E=E)
abe_graph = KPABESymbolDiGraph(sg)
pk_t, mk_t = abe_graph.setup()
return len(str(pk_t))
def compare_dec_rt(N, E, K):
nodes = []
for i in xrange(0,N):
nodes.append('v%d'%(i+1))
attributes = []
vertices = []
policy = "("
for i in xrange(0, K):
if i!=0:
policy+=" OR "
policy+="v%dr"%(i+1)
attributes.append('V%dR'%(i+1))
attributes.append('V%dC'%(i+1))
vertices.append('v%d'%(i+1))
policy+=") AND ("
for i in xrange(0, K):
if i!=0:
policy+=" OR "
policy+="v%dc"%(i+1)
policy+=")"
sg = SymbolDiGraphMat(nodes, rand_E=E)
cpabe_graph = CPABESymbolDiGraph(sg)
cpabe_graph.setup()
cpabeEncMat = cpabe_graph.encrypt()
kpabe_graph = KPABESymbolDiGraph(sg)
kpabe_graph.setup()
kpabeEncMat = kpabe_graph.encrypt()
sg = SymbolDiGraphLst(nodes,rand_E=E)
list_graph = PairEncSymbolDiGraph(sg)
list_graph.setup()
pairEncList = list_graph.encrypt()
cpabe_dk = cpabe_graph.key_generation(attributes)
kpabe_dk = kpabe_graph.key_generation(policy)
plist_dk = list_graph.key_generation(vertices)
Q = 2
subnodes = []
for i in xrange(0, Q):
subnodes.append('v%d'%(i+1))
print "CPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testCPABE_dec(cpabe_graph._master_public_key, cpabe_dk, cpabeEncMat, subnodes))
print "KPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testKPABE_dec(kpabe_dk, kpabeEncMat, subnodes))
print "PAIRE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testPairEnc_dec( plist_dk, pairEncList, subnodes ))
print ""
Q = 4
subnodes = []
for i in xrange(0, Q):
subnodes.append('v%d'%(i+1))
print "CPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testCPABE_dec(cpabe_graph._master_public_key, cpabe_dk, cpabeEncMat, subnodes))
print "KPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testKPABE_dec(kpabe_dk, kpabeEncMat, subnodes))
print "PAIRE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testPairEnc_dec( plist_dk, pairEncList, subnodes ))
print ""
Q = 6
subnodes = []
for i in xrange(0, Q):
subnodes.append('v%d'%(i+1))
print "CPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testCPABE_dec(cpabe_graph._master_public_key,cpabe_dk, cpabeEncMat, subnodes))
print "KPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testKPABE_dec(kpabe_dk, kpabeEncMat, subnodes))
print "PAIRE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testPairEnc_dec( plist_dk, pairEncList, subnodes ))
print ""
Q = 8
subnodes = []
for i in xrange(0, Q):
subnodes.append('v%d'%(i+1))
print "CPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testCPABE_dec(cpabe_graph._master_public_key,cpabe_dk, cpabeEncMat, subnodes))
print "KPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testKPABE_dec(kpabe_dk, kpabeEncMat, subnodes))
print "PAIRE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testPairEnc_dec( plist_dk, pairEncList, subnodes ))
print ""
Q = 10
subnodes = []
for i in xrange(0, Q):
subnodes.append('v%d'%(i+1))
print "CPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testCPABE_dec(cpabe_graph._master_public_key,cpabe_dk, cpabeEncMat, subnodes))
print "KPABE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testKPABE_dec(kpabe_dk, kpabeEncMat, subnodes))
print "PAIRE with %d vertices and %d edges and %d queried subnodes %s s"%(N, E, Q, testPairEnc_dec( plist_dk, pairEncList, subnodes ))
print ""
def testKPABE_ct(nodes, E):
sg = SymbolDiGraphMat(nodes, rand_E=E)
abe_graph = KPABESymbolDiGraph(sg)
abe_graph.setup()
encMat = abe_graph.encrypt()
return len(str(encMat))
