worksheet to console ?
Hi I have written a code in sageworksheet format, it runs nice and smooth on sagecloud, but I have one problem : I want to make it more interactive so the user can enter the parameters by himself, so I'm willing to convert this into a sage script or a pyhton script, I have installed sage on my ubuntu machine, again the code runs on the notebook but not on the console it gives me some syntax error on " P<x> " All I want is to make it run as a Python script or Sage script so I can use input function to ask users to enter the parameters ! Here is the code :
P.<x> = PolynomialRing(ZZ);
def bezout(f,g):
P.<x> = PolynomialRing(QQ)
f = f+x-x
g = g+x-x
e=xgcd(f,g)
gcd=e[0]
u=e[1]
v=e[2]
return (u,v,gcd)
def polymod(f,q):
P.<x> = PolynomialRing(QQ)
f = f
c = f.coefficients(sparse=False)
N = len(c)
for i in range(N):
c[i] = Rational(c[i]).mod_ui(q);
p = sum(c[i]*(x^(i)) for i in range(N));
return p
def center(f,q):
u = q/2
v = -u
c = f.coefficients(sparse=False)
N = len(c)
for i in range(N):
if c[i]<v:
c[i] = c[i] + q;
elif c[i]>u:
c[i] = c[i] - q;
else:
c[i] = c[i];
p = sum(c[i]*(x^(i)) for i in range(N));
return p
class Ntru:
N = None
p = None
q = None
d = None
f = None
g = None
h = None
fp = None
fq = None
Phi = None
def __init__(self,N,p,q,d):
self.N = N
self.p = p
self.q = q
self.d = d
v = self.N
self.Phi = x^v -1
def test(self):
if not is_prime(self.N):
print "N n est pas premier, pensez a changer ce parametre"
return False
if gcd(self.N,self.p) != 1:
print "N et p ne sont pas premiers entre eux, pensez a changer ces parametres"
return False
if gcd(self.N,self.q) != 1:
print "N et q ne sont pas premiers entre eux, pensez a changer ces parameres"
return False
if self.q <= (6*self.d+1)*self.p :
print "q doit etre superieur a (6d+1)*p "
return False
return True
def genPublicKey(self,f_new,g_new):
self.f = f_new
self.g = g_new
(b_f,b_phi,bz) = bezout(self.f,self.Phi)
self.fp = polymod(b_f,self.p)
self.fq = polymod(b_f,self.q)
self.h = polymod((self.fq*self.g).quo_rem(self.Phi)[1],self.q)
if not self.test():
print "le cryptage ne peut s effectuer avec ces parametres !"
quit()
def encrypt(self,message,rand):
if self.h!=None:
temp=(self.p*rand*self.h + message).quo_rem(self.Phi)[1]
e=polymod(temp,self.q)
return e
else:
print "Impossible de faire le cryptage : la cle n a pas encore ete generee"
print "Veuillez en generer une avec la fonction genPublicKey"
def ...