Python PEM.encode方法代码示例

# 需要导入模块: from Crypto.IO import PEM [as 别名]
# 或者: from Crypto.IO.PEM import encode [as 别名]
    def exportKey(self, format='PEM', passphrase=None, pkcs=1, protection=None, randfunc=None):
        """Export this RSA key.

        :Parameters:
          format : string
            The format to use for wrapping the key:

            - *'DER'*. Binary encoding.
            - *'PEM'*. Textual encoding, done according to `RFC1421`_/`RFC1423`_.
            - *'OpenSSH'*. Textual encoding, done according to OpenSSH specification.
              Only suitable for public keys (not private keys).

          passphrase : string
            For private keys only. The pass phrase used for deriving the encryption
            key.

          pkcs : integer
            For *DER* and *PEM* format only.
            The PKCS standard to follow for assembling the components of the key.
            You have two choices:

            - **1** (default): the public key is embedded into
              an X.509 ``SubjectPublicKeyInfo`` DER SEQUENCE.
              The private key is embedded into a `PKCS#1`_
              ``RSAPrivateKey`` DER SEQUENCE.
            - **8**: the private key is embedded into a `PKCS#8`_
              ``PrivateKeyInfo`` DER SEQUENCE. This value cannot be used
              for public keys.

          protection : string
            The encryption scheme to use for protecting the private key.

            If ``None`` (default), the behavior depends on ``format``:

            - For *DER*, the *PBKDF2WithHMAC-SHA1AndDES-EDE3-CBC*
              scheme is used. The following operations are performed:

                1. A 16 byte Triple DES key is derived from the passphrase
                   using `Crypto.Protocol.KDF.PBKDF2` with 8 bytes salt,
                   and 1 000 iterations of `Crypto.Hash.HMAC`.
                2. The private key is encrypted using CBC.
                3. The encrypted key is encoded according to PKCS#8.

            - For *PEM*, the obsolete PEM encryption scheme is used.
              It is based on MD5 for key derivation, and Triple DES for encryption.

            Specifying a value for ``protection`` is only meaningful for PKCS#8
            (that is, ``pkcs=8``) and only if a pass phrase is present too.

            The supported schemes for PKCS#8 are listed in the
            `Crypto.IO.PKCS8` module (see ``wrap_algo`` parameter).

          randfunc : callable
            A function that provides random bytes. Only used for PEM encoding.
            The default is `Crypto.Random.get_random_bytes`.

        :Return: A byte string with the encoded public or private half
          of the key.
        :Raise ValueError:
            When the format is unknown or when you try to encrypt a private
            key with *DER* format and PKCS#1.
        :attention:
            If you don't provide a pass phrase, the private key will be
            exported in the clear!

        .. _RFC1421:    http://www.ietf.org/rfc/rfc1421.txt
        .. _RFC1423:    http://www.ietf.org/rfc/rfc1423.txt
        .. _`PKCS#1`:   http://www.ietf.org/rfc/rfc3447.txt
        .. _`PKCS#8`:   http://www.ietf.org/rfc/rfc5208.txt
        """

        if passphrase is not None:
            passphrase = tobytes(passphrase)

        if randfunc is None:
            randfunc = Random.get_random_bytes

        if format=='OpenSSH':
               eb, nb = [self._key[comp].to_bytes() for comp in 'e', 'n']
               if bord(eb[0]) & 0x80: eb=bchr(0x00)+eb
               if bord(nb[0]) & 0x80: nb=bchr(0x00)+nb
               keyparts = [ b('ssh-rsa'), eb, nb ]
               keystring = b('').join([ struct.pack(">I",len(kp))+kp for kp in keyparts])
               return b('ssh-rsa ')+binascii.b2a_base64(keystring)[:-1]

        # DER format is always used, even in case of PEM, which simply
        # encodes it into BASE64.
        if self.has_private():
                binary_key = newDerSequence(
                        0,
                        self.n,
                        self.e,
                        self.d,
                        self.p,
                        self.q,
                        self.d % (self.p-1),
                        self.d % (self.q-1),
                        Integer(self.q).inverse(self.p)
                    ).encode()
                if pkcs==1:
#.........这里部分代码省略.........

# 需要导入模块: from Crypto.IO import PEM [as 别名]
# 或者: from Crypto.IO.PEM import encode [as 别名]
    def exportKey(self, format='PEM', passphrase=None, pkcs=1,
                   protection=None, randfunc=None):
        """Export this RSA key.

        Args:
          format (string):
            The format to use for wrapping the key:

            - *'PEM'*. (*Default*) Text encoding, done according to `RFC1421`_/`RFC1423`_.
            - *'DER'*. Binary encoding.
            - *'OpenSSH'*. Textual encoding, done according to OpenSSH specification.
              Only suitable for public keys (not private keys).

          passphrase (string):
            (*For private keys only*) The pass phrase used for protecting the output.

          pkcs (integer):
            (*For private keys only*) The ASN.1 structure to use for
            serializing the key. Note that even in case of PEM
            encoding, there is an inner ASN.1 DER structure.

            With ``pkcs=1`` (*default*), the private key is encoded in a
            simple `PKCS#1`_ structure (``RSAPrivateKey``).

            With ``pkcs=8``, the private key is encoded in a `PKCS#8`_ structure
            (``PrivateKeyInfo``).

            .. note::
                This parameter is ignored for a public key.
                For DER and PEM, an ASN.1 DER ``SubjectPublicKeyInfo``
                structure is always used.

          protection (string):
            (*For private keys only*)
            The encryption scheme to use for protecting the private key.

            If ``None`` (default), the behavior depends on :attr:`format`:

            - For *'DER'*, the *PBKDF2WithHMAC-SHA1AndDES-EDE3-CBC*
              scheme is used. The following operations are performed:

                1. A 16 byte Triple DES key is derived from the passphrase
                   using :func:`Crypto.Protocol.KDF.PBKDF2` with 8 bytes salt,
                   and 1 000 iterations of :mod:`Crypto.Hash.HMAC`.
                2. The private key is encrypted using CBC.
                3. The encrypted key is encoded according to PKCS#8.

            - For *'PEM'*, the obsolete PEM encryption scheme is used.
              It is based on MD5 for key derivation, and Triple DES for encryption.

            Specifying a value for :attr:`protection` is only meaningful for PKCS#8
            (that is, ``pkcs=8``) and only if a pass phrase is present too.

            The supported schemes for PKCS#8 are listed in the
            :mod:`Crypto.IO.PKCS8` module (see :attr:`wrap_algo` parameter).

          randfunc (callable):
            A function that provides random bytes. Only used for PEM encoding.
            The default is :func:`Crypto.Random.get_random_bytes`.

        Returns:
          byte string: the encoded key

        Raises:
          ValueError:when the format is unknown or when you try to encrypt a private
            key with *DER* format and PKCS#1.

        .. warning::
            If you don't provide a pass phrase, the private key will be
            exported in the clear!

        .. _RFC1421:    http://www.ietf.org/rfc/rfc1421.txt
        .. _RFC1423:    http://www.ietf.org/rfc/rfc1423.txt
        .. _`PKCS#1`:   http://www.ietf.org/rfc/rfc3447.txt
        .. _`PKCS#8`:   http://www.ietf.org/rfc/rfc5208.txt
        """

        if passphrase is not None:
            passphrase = tobytes(passphrase)

        if randfunc is None:
            randfunc = Random.get_random_bytes

        if format == 'OpenSSH':
            e_bytes, n_bytes = [x.to_bytes() for x in (self._e, self._n)]
            if bord(e_bytes[0]) & 0x80:
                e_bytes = bchr(0) + e_bytes
            if bord(n_bytes[0]) & 0x80:
                n_bytes = bchr(0) + n_bytes
            keyparts = [b('ssh-rsa'), e_bytes, n_bytes]
            keystring = b('').join([struct.pack(">I", len(kp)) + kp for kp in keyparts])
            return b('ssh-rsa ') + binascii.b2a_base64(keystring)[:-1]

        # DER format is always used, even in case of PEM, which simply
        # encodes it into BASE64.
        if self.has_private():
            binary_key = DerSequence([0,
                                      self.n,
                                      self.e,
                                      self.d,
#.........这里部分代码省略.........

# 需要导入模块: from Crypto.IO import PEM [as 别名]
# 或者: from Crypto.IO.PEM import encode [as 别名]
    def exportKey(self, format='PEM', pkcs8=None, passphrase=None,
                  protection=None, randfunc=None):
        """Export this DSA key.

        :Parameters:
          format : string
            The format to use for wrapping the key:

            - *'DER'*. Binary encoding.
            - *'PEM'*. Textual encoding, done according to `RFC1421`_/
              `RFC1423`_ (default).
            - *'OpenSSH'*. Textual encoding, one line of text, see `RFC4253`_.
              Only suitable for public keys, not private keys.

          passphrase : string
            For private keys only. The pass phrase to use for deriving
            the encryption key.

          pkcs8 : boolean
            For private keys only. If ``True`` (default), the key is arranged
            according to `PKCS#8`_ and if `False`, according to the custom
            OpenSSL/OpenSSH encoding.

          protection : string
            The encryption scheme to use for protecting the private key.
            It is only meaningful when a pass phrase is present too.

            If ``pkcs8`` takes value ``True``, ``protection`` is the PKCS#8
            algorithm to use for deriving the secret and encrypting
            the private DSA key.
            For a complete list of algorithms, see `Crypto.IO.PKCS8`.
            The default is *PBKDF2WithHMAC-SHA1AndDES-EDE3-CBC*.

            If ``pkcs8`` is ``False``, the obsolete PEM encryption scheme is
            used. It is based on MD5 for key derivation, and Triple DES for
            encryption. Parameter ``protection`` is ignored.

            The combination ``format='DER'`` and ``pkcs8=False`` is not allowed
            if a passphrase is present.

          randfunc : callable
            A function that returns random bytes.
            By default it is `Crypto.Random.get_random_bytes`.

        :Return: A byte string with the encoded public or private half
          of the key.
        :Raise ValueError:
            When the format is unknown or when you try to encrypt a private
            key with *DER* format and OpenSSL/OpenSSH.
        :attention:
            If you don't provide a pass phrase, the private key will be
            exported in the clear!

        .. _RFC1421:    http://www.ietf.org/rfc/rfc1421.txt
        .. _RFC1423:    http://www.ietf.org/rfc/rfc1423.txt
        .. _RFC4253:    http://www.ietf.org/rfc/rfc4253.txt
        .. _`PKCS#8`:   http://www.ietf.org/rfc/rfc5208.txt
        """

        if passphrase is not None:
            passphrase = tobytes(passphrase)

        if randfunc is None:
            randfunc = Random.get_random_bytes

        if format == 'OpenSSH':
            tup1 = [self._key[x].to_bytes() for x in 'p', 'q', 'g', 'y']

            def func(x):
                if (bord(x[0]) & 0x80):
                    return bchr(0) + x
                else:
                    return x

            tup2 = map(func, tup1)
            keyparts = [b('ssh-dss')] + tup2
            keystring = b('').join(
                            [struct.pack(">I", len(kp)) + kp for kp in keyparts]
                            )
            return b('ssh-dss ') + binascii.b2a_base64(keystring)[:-1]

        # DER format is always used, even in case of PEM, which simply
        # encodes it into BASE64.
        params = newDerSequence(self.p, self.q, self.g)
        if self.has_private():
            if pkcs8 is None:
                pkcs8 = True
            if pkcs8:
                if not protection:
                    protection = 'PBKDF2WithHMAC-SHA1AndDES-EDE3-CBC'
                private_key = DerInteger(self.x).encode()
                binary_key = PKCS8.wrap(
                                private_key, oid, passphrase,
                                protection, key_params=params,
                                randfunc=randfunc
                                )
                if passphrase:
                    key_type = 'ENCRYPTED PRIVATE'
                else:
                    key_type = 'PRIVATE'
#.........这里部分代码省略.........

# 需要导入模块: from Crypto.IO import PEM [as 别名]
# 或者: from Crypto.IO.PEM import encode [as 别名]
 def _export_private_encrypted_pkcs8_in_clear_pem(self, passphrase, **kwargs):
     assert passphrase
     if 'protection' not in kwargs:
         raise ValueError("At least the 'protection' parameter should be present")
     encoded_der = self._export_pkcs8(passphrase=passphrase, **kwargs)
     return PEM.encode(encoded_der, "ENCRYPTED PRIVATE KEY")

# 需要导入模块: from Crypto.IO import PEM [as 别名]
# 或者: from Crypto.IO.PEM import encode [as 别名]
 def _export_private_clear_pkcs8_in_clear_pem(self):
     encoded_der = self._export_pkcs8()
     return PEM.encode(encoded_der, "PRIVATE KEY")

# 需要导入模块: from Crypto.IO import PEM [as 别名]
# 或者: from Crypto.IO.PEM import encode [as 别名]
 def _export_private_pem(self, passphrase, **kwargs):
     encoded_der = self._export_private_der()
     return PEM.encode(encoded_der, "EC PRIVATE KEY", passphrase, **kwargs)

# 需要导入模块: from Crypto.IO import PEM [as 别名]
# 或者: from Crypto.IO.PEM import encode [as 别名]
 def _export_public_pem(self):
     encoded_der = self._export_subjectPublicKeyInfo()
     return PEM.encode(encoded_der, "PUBLIC KEY")

# 需要导入模块: from Crypto.IO import PEM [as 别名]
# 或者: from Crypto.IO.PEM import encode [as 别名]
    def exportKey(self, format='PEM', pkcs8=None, passphrase=None,
                  protection=None, randfunc=None):
        """Export this DSA key.

        Args:
          format (string):
            The encoding for the output:

            - *'PEM'* (default). ASCII as per `RFC1421`_/ `RFC1423`_.
            - *'DER'*. Binary ASN.1 encoding.
            - *'OpenSSH'*. ASCII one-liner as per `RFC4253`_.
              Only suitable for public keys, not for private keys.

          passphrase (string):
            *Private keys only*. The pass phrase to protect the output.

          pkcs8 (boolean):
            *Private keys only*. If ``True`` (default), the key is encoded
            with `PKCS#8`_. If ``False``, it is encoded in the custom
            OpenSSL/OpenSSH container.

          protection (string):
            *Only in combination with a pass phrase*.
            The encryption scheme to use to protect the output.

            If :data:`pkcs8` takes value ``True``, this is the PKCS#8
            algorithm to use for deriving the secret and encrypting
            the private DSA key.
            For a complete list of algorithms, see :mod:`Crypto.IO.PKCS8`.
            The default is *PBKDF2WithHMAC-SHA1AndDES-EDE3-CBC*.

            If :data:`pkcs8` is ``False``, the obsolete PEM encryption scheme is
            used. It is based on MD5 for key derivation, and Triple DES for
            encryption. Parameter :data:`protection` is then ignored.

            The combination ``format='DER'`` and ``pkcs8=False`` is not allowed
            if a passphrase is present.

          randfunc (callable):
            A function that returns random bytes.
            By default it is :func:`Crypto.Random.get_random_bytes`.

        Returns:
          byte string : the encoded key

        Raises:
          ValueError : when the format is unknown or when you try to encrypt a private
            key with *DER* format and OpenSSL/OpenSSH.

        .. warning::
            If you don't provide a pass phrase, the private key will be
            exported in the clear!

        .. _RFC1421:    http://www.ietf.org/rfc/rfc1421.txt
        .. _RFC1423:    http://www.ietf.org/rfc/rfc1423.txt
        .. _RFC4253:    http://www.ietf.org/rfc/rfc4253.txt
        .. _`PKCS#8`:   http://www.ietf.org/rfc/rfc5208.txt
        """

        if passphrase is not None:
            passphrase = tobytes(passphrase)

        if randfunc is None:
            randfunc = Random.get_random_bytes

        if format == 'OpenSSH':
            tup1 = [self._key[x].to_bytes() for x in 'p', 'q', 'g', 'y']

            def func(x):
                if (bord(x[0]) & 0x80):
                    return bchr(0) + x
                else:
                    return x

            tup2 = map(func, tup1)
            keyparts = [b('ssh-dss')] + tup2
            keystring = b('').join(
                            [struct.pack(">I", len(kp)) + kp for kp in keyparts]
                            )
            return b('ssh-dss ') + binascii.b2a_base64(keystring)[:-1]

        # DER format is always used, even in case of PEM, which simply
        # encodes it into BASE64.
        params = DerSequence([self.p, self.q, self.g])
        if self.has_private():
            if pkcs8 is None:
                pkcs8 = True
            if pkcs8:
                if not protection:
                    protection = 'PBKDF2WithHMAC-SHA1AndDES-EDE3-CBC'
                private_key = DerInteger(self.x).encode()
                binary_key = PKCS8.wrap(
                                private_key, oid, passphrase,
                                protection, key_params=params,
                                randfunc=randfunc
                                )
                if passphrase:
                    key_type = 'ENCRYPTED PRIVATE'
                else:
                    key_type = 'PRIVATE'
#.........这里部分代码省略.........