def generate_c(bits, randfunc, progress_func = None):
# Generate the prime factors of n
if progress_func:
progress_func('p,q\n')
p = q = 1L
while number.size(p*q) < bits:
p = pubkey.getPrime(bits/2, randfunc)
q = pubkey.getPrime(bits/2, randfunc)
# p shall be smaller than q (for calc of u)
if p > q:
(p, q)=(q, p)
if progress_func:
progress_func('u\n')
u=pubkey.inverse(p, q)
n=p*q
e = 65537L
if progress_func:
progress_func('d\n')
d=pubkey.inverse(e, (p-1)*(q-1))
key = _fastmath.rsa_construct(n,e,d,p,q,u)
obj = RSAobj_c(key)
## print p
## print q
## print number.size(p), number.size(q), number.size(q*p),
## print obj.size(), bits
assert bits <= 1+obj.size(), "Generated key is too small"
return obj
def generate(bits, randfunc, progress_func=None):
"""generate(bits:int, randfunc:callable, progress_func:callable)
Generate an RSA key of length 'bits', using 'randfunc' to get
random data and 'progress_func', if present, to display
the progress of the key generation.
"""
obj=RSAobj()
# Generate the prime factors of n
if progress_func:
progress_func('p,q\n')
p = q = 1L
while number.size(p*q) < bits:
p = pubkey.getPrime(bits/2, randfunc)
q = pubkey.getPrime(bits/2, randfunc)
# p shall be smaller than q (for calc of u)
if p > q:
(p, q)=(q, p)
obj.p = p
obj.q = q
if progress_func:
progress_func('u\n')
obj.u = pubkey.inverse(obj.p, obj.q)
obj.n = obj.p*obj.q
obj.e = 65537L
if progress_func:
progress_func('d\n')
obj.d=pubkey.inverse(obj.e, (obj.p-1)*(obj.q-1))
assert bits <= 1+obj.size(), "Generated key is too small"
return obj
