Python cryptography.hazmat.primitives.asymmetric.rsa.rsa_crt_dmp1() Examples

def deserialize(self, data):
        pgp_key, _ = pgpy.PGPKey.from_blob(data)
        password = ""
        if self.password:
            password = self.password
        with pgp_key.unlock(password):
            key_material = pgp_key._key.keymaterial
            # https://tools.ietf.org/html/rfc4880#section-5.5.3
            # "multiprecision integer (MPI) of RSA secret exponent d."
            self._d = key_material.d
            # "MPI of RSA secret prime value p."
            self._p = key_material.p
            # "MPI of RSA secret prime value q (p < q)."
            self._q = key_material.q
            self._iqmp = rsa.rsa_crt_iqmp(key_material.p, key_material.q)
            self._dmp1 = rsa.rsa_crt_dmp1(key_material.d, key_material.q)
            self._dmq1 = rsa.rsa_crt_dmq1(key_material.d, key_material.q)
            self._public_numbers = ErisPublic(
                e=key_material.e,
                n=key_material.n) 

def _process_jwk(self, jwk_dict):
        if not jwk_dict.get('kty') == 'RSA':
            raise JWKError("Incorrect key type. Expected: 'RSA', Received: %s" % jwk_dict.get('kty'))

        e = base64_to_long(jwk_dict.get('e', 256))
        n = base64_to_long(jwk_dict.get('n'))
        public = rsa.RSAPublicNumbers(e, n)

        if 'd' not in jwk_dict:
            return public.public_key(self.cryptography_backend())
        else:
            # This is a private key.
            d = base64_to_long(jwk_dict.get('d'))

            extra_params = ['p', 'q', 'dp', 'dq', 'qi']

            if any(k in jwk_dict for k in extra_params):
                # Precomputed private key parameters are available.
                if not all(k in jwk_dict for k in extra_params):
                    # These values must be present when 'p' is according to
                    # Section 6.3.2 of RFC7518, so if they are not we raise
                    # an error.
                    raise JWKError('Precomputed private key parameters are incomplete.')

                p = base64_to_long(jwk_dict['p'])
                q = base64_to_long(jwk_dict['q'])
                dp = base64_to_long(jwk_dict['dp'])
                dq = base64_to_long(jwk_dict['dq'])
                qi = base64_to_long(jwk_dict['qi'])
            else:
                # The precomputed private key parameters are not available,
                # so we use cryptography's API to fill them in.
                p, q = rsa.rsa_recover_prime_factors(n, e, d)
                dp = rsa.rsa_crt_dmp1(d, p)
                dq = rsa.rsa_crt_dmq1(d, q)
                qi = rsa.rsa_crt_iqmp(p, q)

            private = rsa.RSAPrivateNumbers(p, q, d, dp, dq, qi, public)

            return private.private_key(self.cryptography_backend()) 

def __privkey__(self):
        return rsa.RSAPrivateNumbers(self.p, self.q, self.d,
                                     rsa.rsa_crt_dmp1(self.d, self.p),
                                     rsa.rsa_crt_dmq1(self.d, self.q),
                                     rsa.rsa_crt_iqmp(self.p, self.q),
                                     rsa.RSAPublicNumbers(self.e, self.n)).private_key(default_backend()) 

def _fromRSAComponents(cls, n, e, d=None, p=None, q=None, u=None):
        """
        Build a key from RSA numerical components.

        @type n: L{int}
        @param n: The 'n' RSA variable.

        @type e: L{int}
        @param e: The 'e' RSA variable.

        @type d: L{int} or L{None}
        @param d: The 'd' RSA variable (optional for a public key).

        @type p: L{int} or L{None}
        @param p: The 'p' RSA variable (optional for a public key).

        @type q: L{int} or L{None}
        @param q: The 'q' RSA variable (optional for a public key).

        @type u: L{int} or L{None}
        @param u: The 'u' RSA variable. Ignored, as its value is determined by
        p and q.

        @rtype: L{Key}
        @return: An RSA key constructed from the values as given.
        """
        publicNumbers = rsa.RSAPublicNumbers(e=e, n=n)
        if d is None:
            # We have public components.
            keyObject = publicNumbers.public_key(default_backend())
        else:
            privateNumbers = rsa.RSAPrivateNumbers(
                p=p,
                q=q,
                d=d,
                dmp1=rsa.rsa_crt_dmp1(d, p),
                dmq1=rsa.rsa_crt_dmq1(d, q),
                iqmp=rsa.rsa_crt_iqmp(p, q),
                public_numbers=publicNumbers,
            )
            keyObject = privateNumbers.private_key(default_backend())

        return cls(keyObject) 

def _fromRSAComponents(cls, n, e, d=None, p=None, q=None, u=None):
        """
        Build a key from RSA numerical components.

        @type n: L{int}
        @param n: The 'n' RSA variable.

        @type e: L{int}
        @param e: The 'e' RSA variable.

        @type d: L{int} or L{None}
        @param d: The 'd' RSA variable (optional for a public key).

        @type p: L{int} or L{None}
        @param p: The 'p' RSA variable (optional for a public key).

        @type q: L{int} or L{None}
        @param q: The 'q' RSA variable (optional for a public key).

        @type u: L{int} or L{None}
        @param u: The 'u' RSA variable. Ignored, as its value is determined by
        p and q.

        @rtype: L{Key}
        @return: An RSA key constructed from the values as given.
        """
        publicNumbers = rsa.RSAPublicNumbers(e=e, n=n)
        if d is None:
            # We have public components.
            keyObject = publicNumbers.public_key(default_backend())
        else:
            privateNumbers = rsa.RSAPrivateNumbers(
                p=p,
                q=q,
                d=d,
                dmp1=rsa.rsa_crt_dmp1(d, p),
                dmq1=rsa.rsa_crt_dmq1(d, q),
                iqmp=rsa.rsa_crt_iqmp(p, q),
                public_numbers=publicNumbers,
            )
            keyObject = privateNumbers.private_key(default_backend())

        return cls(keyObject)