RSA_generate_key man page on DigitalUNIX

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RSA_generate_key(3)					   RSA_generate_key(3)

NAME
       RSA_generate_key - Generate RSA key pair

SYNOPSIS
       #include <openssl/rsa.h>

       RSA *RSA_generate_key(
	       int num,
	       unsigned long e,
	       void ((*callback)(int,int,void *)),
	       void *cb_arg );

DESCRIPTION
       The  RSA_generate_key() function generates a key pair and returns it in
       a newly allocated RSA structure.	 The  pseudo-random  number  generator
       must be seeded prior to calling RSA_generate_key().

       The  modulus  size will be num bits, and the public exponent will be e.
       Key sizes with num < 1024 should be considered insecure.	 The  exponent
       is an odd number, typically 3, 17 or 65537.

       A  callback function may be used to provide feedback about the progress
       of the key generation. If callback is not NULL, it will	be  called  as
       follows:	 While	a  random  prime  number is generated, it is called as
       described in BN_generate_prime(3).  When the  n-th  randomly  generated
       prime  is  rejected as not suitable for the key, callback(2, n, cb_arg)
       is called.  When a random p has been found with p-1 relatively prime to
       e, it is called as callback(3, 0, cb_arg).

       The process is then repeated for prime q with callback(3, 1, cb_arg).

RESTRICTIONS
       callback(2, x, cb_arg) is used with two different meanings.

       The  RSA_generate_key() function goes into an infinite loop for illegal
       input values.

RETURN VALUE
       If key generation fails, RSA_generate_key()  returns  NULL;  the	 error
       codes can be obtained by using the ERR_get_error() function.

HISTORY
       The cb_arg argument was added in SSLeay 0.9.0.

SEE ALSO
       Functions: err(3),

       rand_ssl(3),

       rsa(3),

       RSA_free(3)

							   RSA_generate_key(3)
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