def generate(self, bits, randfunc=None, progress_func=None):
rf = self._get_randfunc(randfunc)
obj = _RSA.generate_py(
bits, rf, progress_func) # TODO: Don't use legacy _RSA module
key = self._math.rsa_construct(obj.n, obj.e, obj.d, obj.p, obj.q,
obj.u)
return _RSAobj(self, key)
def generate(self, bits, randfunc=None, progress_func=None):
if bits < 1024 or (bits & 0xff) != 0:
# pubkey.getStrongPrime doesn't like anything that's not a multiple of 128 and > 512
raise ValueError("RSA modulus length must be a multiple of 256 and > 1024")
rf = self._get_randfunc(randfunc)
obj = _RSA.generate_py(bits, rf, progress_func) # TODO: Don't use legacy _RSA module
key = self._math.rsa_construct(obj.n, obj.e, obj.d, obj.p, obj.q, obj.u)
return _RSAobj(self, key)
def generate(self, bits, randfunc=None, progress_func=None, e=65537):
"""Randomly generate a fresh, new RSA key.
:Parameters:
bits : int
Key length, or size (in bits) of the RSA modulus.
It must be a multiple of 256, and no smaller than 1024.
randfunc : callable
Random number generation function; it should accept
a single integer N and return a string of random data
N bytes long.
If not specified, a new one will be instantiated
from ``Crypto.Random``.
progress_func : callable
Optional function that will be called with a short string
containing the key parameter currently being generated;
it's useful for interactive applications where a user is
waiting for a key to be generated.
e : int
Public RSA exponent. It must be an odd positive integer.
It is typically a small number with very few ones in its
binary representation.
The default value 65537 (= ``0b10000000000000001`` ) is a safe
choice: other common values are 5, 7, 17, and 257.
:attention: You should always use a cryptographically secure random number generator,
such as the one defined in the ``Crypto.Random`` module; **don't** just use the
current time and the ``random`` module.
:attention: Exponent 3 is also widely used, but it requires very special care when padding
the message.
:Return: An RSA key object (`_RSAobj`).
:Raise ValueError:
When **bits** is too little or not a multiple of 256, or when
**e** is not odd or smaller than 2.
"""
if bits < 1024 or (bits & 0xff) != 0:
# pubkey.getStrongPrime doesn't like anything that's not a multiple of 256 and >= 1024
raise ValueError(
"RSA modulus length must be a multiple of 256 and >= 1024")
if e % 2 == 0 or e < 3:
raise ValueError(
"RSA public exponent must be a positive, odd integer larger than 2."
)
rf = self._get_randfunc(randfunc)
obj = _RSA.generate_py(bits, rf, progress_func,
e) # TODO: Don't use legacy _RSA module
key = self._math.rsa_construct(obj.n, obj.e, obj.d, obj.p, obj.q,
obj.u)
return _RSAobj(self, key)
def generate(self, bits, randfunc=None, progress_func=None, e=65537):
if bits < 1024 or bits & 255 != 0:
raise ValueError(
'RSA modulus length must be a multiple of 256 and >= 1024')
if e % 2 == 0 or e < 3:
raise ValueError(
'RSA public exponent must be a positive, odd integer larger than 2.'
)
rf = self._get_randfunc(randfunc)
obj = _RSA.generate_py(bits, rf, progress_func, e)
key = self._math.rsa_construct(obj.n, obj.e, obj.d, obj.p, obj.q,
obj.u)
return _RSAobj(self, key)
def generate(self, bits, randfunc=None, progress_func=None, e=65537):
"""Randomly generate a fresh, new RSA key.
:Parameters:
bits : int
Key length, or size (in bits) of the RSA modulus.
It must be a multiple of 256, and no smaller than 1024.
randfunc : callable
Random number generation function; it should accept
a single integer N and return a string of random data
N bytes long.
If not specified, a new one will be instantiated
from ``Crypto.Random``.
progress_func : callable
Optional function that will be called with a short string
containing the key parameter currently being generated;
it's useful for interactive applications where a user is
waiting for a key to be generated.
e : int
Public RSA exponent. It must be an odd positive integer.
It is typically a small number with very few ones in its
binary representation.
The default value 65537 (= ``0b10000000000000001`` ) is a safe
choice: other common values are 5, 7, 17, and 257.
:attention: You should always use a cryptographically secure random number generator,
such as the one defined in the ``Crypto.Random`` module; **don't** just use the
current time and the ``random`` module.
:attention: Exponent 3 is also widely used, but it requires very special care when padding
the message.
:Return: An RSA key object (`_RSAobj`).
:Raise ValueError:
When **bits** is too little or not a multiple of 256, or when
**e** is not odd or smaller than 2.
"""
if bits < 1024 or (bits & 0xff) != 0:
# pubkey.getStrongPrime doesn't like anything that's not a multiple of 256 and >= 1024
raise ValueError("RSA modulus length must be a multiple of 256 and >= 1024")
if e%2==0 or e<3:
raise ValueError("RSA public exponent must be a positive, odd integer larger than 2.")
rf = self._get_randfunc(randfunc)
obj = _RSA.generate_py(bits, rf, progress_func, e) # TODO: Don't use legacy _RSA module
key = self._math.rsa_construct(obj.n, obj.e, obj.d, obj.p, obj.q, obj.u)
return _RSAobj(self, key)
def generate(self, bits, randfunc=None, progress_func=None):
rf = self._get_randfunc(randfunc)
obj = _RSA.generate_py(bits, rf, progress_func) # TODO: Don't use legacy _RSA module
key = self._math.rsa_construct(obj.n, obj.e, obj.d, obj.p, obj.q, obj.u)
return _RSAobj(self, key)
