dsa man page on IRIX

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     0.9.7e/doc/apps

     Page 1					    (printed 10/20/05)

     DSA(1)		   30/Jan/2003 (0.9.7e)			DSA(1)

     NAME
	  dsa - DSA key processing

     SYNOPSIS
	  openssl dsa [-inform PEM|DER] [-outform PEM|DER] [-in
	  filename] [-passin arg] [-out filename] [-passout arg]
	  [-des] [-des3] [-idea] [-text] [-noout] [-modulus] [-pubin]
	  [-pubout] [-engine id]

     DESCRIPTION
	  The dsa command processes DSA keys. They can be converted
	  between various forms and their components printed out. Note
	  This command uses the traditional SSLeay compatible format
	  for private key encryption: newer applications should use
	  the more secure PKCS#8 format using the pkcs8

     COMMAND OPTIONS
	  -inform DER|PEM
	      This specifies the input format. The DER option with a
	      private key uses an ASN1 DER encoded form of an ASN.1
	      SEQUENCE consisting of the values of version (currently
	      zero), p, q, g, the public and private key components
	      respectively as ASN.1 INTEGERs. When used with a public
	      key it uses a SubjectPublicKeyInfo structure: it is an
	      error if the key is not DSA.

	      The PEM form is the default format: it consists of the
	      DER format base64 encoded with additional header and
	      footer lines. In the case of a private key PKCS#8 format
	      is also accepted.

	  -outform DER|PEM
	      This specifies the output format, the options have the
	      same meaning as the -inform option.

	  -in filename
	      This specifies the input filename to read a key from or
	      standard input if this option is not specified. If the
	      key is encrypted a pass phrase will be prompted for.

	  -passin arg
	      the input file password source. For more information
	      about the format of arg see the PASS PHRASE ARGUMENTS
	      section in openssl(1).

	  -out filename
	      This specifies the output filename to write a key to or
	      standard output by is not specified. If any encryption
	      options are set then a pass phrase will be prompted for.
	      The output filename should not be the same as the input
	      filename.

     Page 1					    (printed 10/20/05)

     DSA(1)		   30/Jan/2003 (0.9.7e)			DSA(1)

	  -passout arg
	      the output file password source. For more information
	      about the format of arg see the PASS PHRASE ARGUMENTS
	      section in openssl(1).

	  -des|-des3|-idea
	      These options encrypt the private key with the DES,
	      triple DES, or the IDEA ciphers respectively before
	      outputting it. A pass phrase is prompted for.  If none
	      of these options is specified the key is written in
	      plain text. This means that using the dsa utility to
	      read in an encrypted key with no encryption option can
	      be used to remove the pass phrase from a key, or by
	      setting the encryption options it can be use to add or
	      change the pass phrase.  These options can only be used
	      with PEM format output files.

	  -text
	      prints out the public, private key components and
	      parameters.

	  -noout
	      this option prevents output of the encoded version of
	      the key.

	  -modulus
	      this option prints out the value of the public key
	      component of the key.

	  -pubin
	      by default a private key is read from the input file:
	      with this option a public key is read instead.

	  -pubout
	      by default a private key is output. With this option a
	      public key will be output instead. This option is
	      automatically set if the input is a public key.

	  -engine id
	      specifying an engine (by it's unique id string) will
	      cause req to attempt to obtain a functional reference to
	      the specified engine, thus initialising it if needed.
	      The engine will then be set as the default for all
	      available algorithms.

     NOTES
	  The PEM private key format uses the header and footer lines:

	   -----BEGIN DSA PRIVATE KEY-----
	   -----END DSA PRIVATE KEY-----

	  The PEM public key format uses the header and footer lines:

     Page 2					    (printed 10/20/05)

     DSA(1)		   30/Jan/2003 (0.9.7e)			DSA(1)

	   -----BEGIN PUBLIC KEY-----
	   -----END PUBLIC KEY-----

     EXAMPLES
	  To remove the pass phrase on a DSA private key:

	   openssl dsa -in key.pem -out keyout.pem

	  To encrypt a private key using triple DES:

	   openssl dsa -in key.pem -des3 -out keyout.pem

	  To convert a private key from PEM to DER format:

	   openssl dsa -in key.pem -outform DER -out keyout.der

	  To print out the components of a private key to standard
	  output:

	   openssl dsa -in key.pem -text -noout

	  To just output the public part of a private key:

	   openssl dsa -in key.pem -pubout -out pubkey.pem

     SEE ALSO
	  dsaparam(1), gendsa(1), rsa(1), genrsa(1)

     Page 3					    (printed 10/20/05)

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