genrsa man page on Tru64

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genrsa(1ssl)							  genrsa(1ssl)

NAME
       genrsa - Generate an RSA private key

SYNOPSIS
       openssl	genrsa	[-out  filename] [-passout arg] [-des] [-des3] [-idea]
       [-f4] [-3] [-randfilename] [numbits]

OPTIONS
       Outputs the filename. If this argument is not specified	then  standard
       output is used.	Outputs the file password source. For more information
       about the format of arg	see  the  Pass	Phrase	Arguments  section  in
       openssl(1ssl).	Encrypts  the private key with the DES, triple DES, or
       the  IDEA ciphers, respectively, before outputting it. If none of these
       options	is  specified  no  encryption  is used. If encryption is used,
       there is a prompt for a pass phrase if it is not supplied via the -pas‐
       sout  argument.	 The  public  exponent	to use, either 65537 or 3. The
       default is 65537.  A file or files containing random data used to  seed
       the  random number generator, or an EGD socket. (See RAND_egd(3).) Mul‐
       tiple files can be specified separated by  an  OS-dependent  character.
       The  separator is a semicolon (;) for MS-Windows, a comma (,) for Open‐
       VMS, and a colon (:) for all others.  The size of the  private  key  to
       generate	 in bits. This must be the last option specified.  The default
       is 512.

DESCRIPTION
       The genrsa command generates an RSA private key.

NOTES
       RSA private key generation essentially involves the generation  of  two
       prime  numbers.	When generating a private key, various symbols will be
       output to indicate the progress of the generation. A period (.)	repre‐
       sents  each  number  that passed an initial sieve test. A plus sign (+)
       means a number has passed a single round of the Miller-Rabin  primality
       test.  A	 newline means that the number has passed all the prime tests;
       the actual number depends on the key size.

       Because key generation is a random process, the time taken to  generate
       a key may vary.

RESTRICTIONS
       A  quirk	 of  the prime generation algorithm is that it cannot generate
       small primes. Therefore, the number of bits should not be less that 64.
       For  typical  private  keys  this will not matter because, for security
       reasons, they will be much larger (typically 1024 bits).

SEE ALSO
       Commands: gendsa(1ssl)

								  genrsa(1ssl)
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