An implementation of the Diffie-Hellman key exchange protocol based on discrete logarithms in finite fields, the same basis that DSA is built on.

Accessor methods for the Diffie-Hellman parameters

DH#p

The prime (an OpenSSL::BN) of the Diffie-Hellman parameters.

DH#g

The generator (an OpenSSL::BN) g of the Diffie-Hellman parameters.

DH#pub_key

The per-session public key (an OpenSSL::BN) matching the private key. This needs to be passed to DH#compute_key.

DH#priv_key

The per-session private key, an OpenSSL::BN.

Example of a key exchange

dh1 = OpenSSL::PKey::DH.new(2048)
der = dh1.public_key.to_der #you may send this publicly to the participating party
dh2 = OpenSSL::PKey::DH.new(der)
dh2.generate_key! #generate the per-session key pair
symm_key1 = dh1.compute_key(dh2.pub_key)
symm_key2 = dh2.compute_key(dh1.pub_key)

puts symm_key1 == symm_key2 # => true

Constants

DEFAULT_2048 = new <<-_end_of_pem_ -----BEGIN DH PARAMETERS----- MIIBCAKCAQEA7E6kBrYiyvmKAMzQ7i8WvwVk9Y/+f8S7sCTN712KkK3cqd1jhJDY JbrYeNV3kUIKhPxWHhObHKpD1R84UpL+s2b55+iMd6GmL7OYmNIT/FccKhTcveab VBmZT86BZKYyf45hUF9FOuUM9xPzuK3Vd8oJQvfYMCd7LPC0taAEljQLR4Edf8E6 YoaOffgTf5qxiwkjnlVZQc3whgnEt9FpVMvQ9eknyeGB5KHfayAc3+hUAvI3/Cr3 1bNveX5wInh5GDx1FGhKBZ+s1H+aedudCm7sCgRwv8lKWYGiHzObSma8A86KG+MD 7Lo5JquQ3DlBodj3IDyPrxIv96lvRPFtAwIBAg== -----END DH PARAMETERS----- _end_of_pem_

DEFAULT_1024 = new <<-_end_of_pem_ -----BEGIN DH PARAMETERS----- MIGHAoGBAJ0lOVy0VIr/JebWn0zDwY2h+rqITFOpdNr6ugsgvkDXuucdcChhYExJ AV/ZD2AWPbrTqV76mGRgJg4EddgT1zG0jq3rnFdMj2XzkBYx3BVvfR0Arnby0RHR T4h7KZ/2zmjvV+eF8kBUHBJAojUlzxKj4QeO2x20FP9X5xmNUXeDAgEC -----END DH PARAMETERS----- _end_of_pem_

Attributes

Show files where this class is defined (2 files)
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