Manual Pages for UNIX Operating System command usage for man RSA_generate_key

OpenSSL                                RSA_generate_key(3openssl)



NNNNAAAAMMMMEEEE
     RSA_generate_key - generate RSA key pair

SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
      #include 

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


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

     The modulus size will be nnnnuuuummmm bits, and the public exponent
     will be eeee. Key sizes with nnnnuuuummmm < 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 ccccaaaallllllllbbbbaaaacccckkkk is not NNNNUUUULLLLLLLL,
     it will be called as follows:

     +o   While a random prime number is generated, it is called
         as described in BN_generate_prime(3).

     +o   When the n-th randomly generated prime is rejected as
         not suitable for the key, ccccaaaallllllllbbbbaaaacccckkkk((((2222,,,, nnnn,,,, ccccbbbb_aaaarrrrgggg)))) is
         called.

     +o   When a random p has been found with p-1 relatively prime
         to eeee, it is called as ccccaaaallllllllbbbbaaaacccckkkk((((3333,,,, 0000,,,, ccccbbbb_aaaarrrrgggg)))).

     The process is then repeated for prime q with ccccaaaallllllllbbbbaaaacccckkkk((((3333,,,, 1111,,,,
     ccccbbbb_aaaarrrrgggg)))).

RRRREEEETTTTUUUURRRRNNNN VVVVAAAALLLLUUUUEEEE
     If key generation fails, RSA_generate_key() returns NNNNUUUULLLLLLLL;
     the error codes can be obtained by ERR_get_error(3).

BBBBUUUUGGGGSSSS
     ccccaaaallllllllbbbbaaaacccckkkk((((2222,,,, xxxx,,,, ccccbbbb_aaaarrrrgggg)))) is used with two different meanings.

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

SSSSEEEEEEEE AAAALLLLSSSSOOOO
     ERR_get_error(3), rand(3), rsa(3), RSA_free(3)





25/Sep/2002            Last change: 0.9.8o                      1






OpenSSL                                RSA_generate_key(3openssl)



HHHHIIIISSSSTTTTOOOORRRRYYYY
     The ccccbbbb_aaaarrrrgggg argument was added in SSLeay 0.9.0.





















































25/Sep/2002            Last change: 0.9.8o                      2