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     KEYRING-GENSK(2)                                 KEYRING-GENSK(2)

          genSK, genSKfromPK, sktopk, dhparams - generate keys

          include "keyring.m";
          keyring := load Keyring Keyring->PATH;
          genSK:  fn(algname, owner: string, length: int): ref SK;
          genSKfromPK:  fn(pk: ref PK, owner: string): ref SK;
          sktopk:  fn(sk: ref SK): ref PK;
          dhparams:  fn(nbits: int): (ref IPint, ref IPint);

          GenSK generates a public/private key pair, represented by
          SK.  (Although we call it a `private key', SK contains both
          the private and public parts of a public key.)  Algname is
          the name of the algorithm to use; in the current implementa-
          tion, only elgamal and rsa are possible.  Owner is the user
          name to be associated with the key.  Length gives the length
          of the key modulus in bits.  GenSK returns nil if an unknown
          algorithm has been specified.

          GenSKfromPK generates a private key that has the same system
          parameters as the public key pk. It is used to generate new
          keys that are of the same complexity as old keys.

          Sktopk extracts the public part of private key.

          Dhparams creates Diffie-Hellman parameters. The second IPint
          returned is an nbits long prime number that serves as the
          modulus.  The first IPint is a primitive root in the integer
          field defined by that modulus.