Manual Pages for UNIX Operating System command usage for man BN_CTX_get

OpenSSL                                    BN_CTX_start(3openssl)



NNNNAAAAMMMMEEEE
     BN_CTX_start, BN_CTX_get, BN_CTX_end - use temporary BIGNUM
     variables

SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
      #include 

      void BN_CTX_start(BN_CTX *ctx);

      BIGNUM *BN_CTX_get(BN_CTX *ctx);

      void BN_CTX_end(BN_CTX *ctx);


DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
     These functions are used to obtain temporary BBBBIIIIGGGGNNNNUUUUMMMM
     variables from a BBBBNNNN_CCCCTTTTXXXX (which can been created by using
     BN_CTX_new(3)) in order to save the overhead of repeatedly
     creating and freeing BBBBIIIIGGGGNNNNUUUUMMMMs in functions that are called
     from inside a loop.

     A function must call BN_CTX_start() first. Then,
     BN_CTX_get() may be called repeatedly to obtain temporary
     BBBBIIIIGGGGNNNNUUUUMMMMs. All BN_CTX_get() calls must be made before calling
     any other functions that use the ccccttttxxxx as an argument.

     Finally, BN_CTX_end() must be called before returning from
     the function.  When BN_CTX_end() is called, the BBBBIIIIGGGGNNNNUUUUMMMM
     pointers obtained from BN_CTX_get() become invalid.

RRRREEEETTTTUUUURRRRNNNN VVVVAAAALLLLUUUUEEEESSSS
     BN_CTX_start() and BN_CTX_end() return no values.

     BN_CTX_get() returns a pointer to the BBBBIIIIGGGGNNNNUUUUMMMM, or NNNNUUUULLLLLLLL on
     error.  Once BN_CTX_get() has failed, the subsequent calls
     will return NNNNUUUULLLLLLLL as well, so it is sufficient to check the
     return value of the last BN_CTX_get() call. In case of an
     error, an error code is set, which can be obtained by
     ERR_get_error(3).

SSSSEEEEEEEE AAAALLLLSSSSOOOO
     BN_CTX_new(3)

HHHHIIIISSSSTTTTOOOORRRRYYYY
     BN_CTX_start(), BN_CTX_get() and BN_CTX_end() were added in
     OpenSSL 0.9.5.









11/Jul/2000            Last change: 0.9.8o                      1






OpenSSL                                    BN_CTX_start(3openssl)























































11/Jul/2000            Last change: 0.9.8o                      2