Manual Pages for UNIX Operating System command usage for man BN_clear_bit

OpenSSL                                      BN_set_bit(3openssl)



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     BN_set_bit, BN_clear_bit, BN_is_bit_set, BN_mask_bits,
     BN_lshift, BN_lshift1, BN_rshift, BN_rshift1 - bit
     operations on BIGNUMs

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      #include 

      int BN_set_bit(BIGNUM *a, int n);
      int BN_clear_bit(BIGNUM *a, int n);

      int BN_is_bit_set(const BIGNUM *a, int n);

      int BN_mask_bits(BIGNUM *a, int n);

      int BN_lshift(BIGNUM *r, const BIGNUM *a, int n);
      int BN_lshift1(BIGNUM *r, BIGNUM *a);

      int BN_rshift(BIGNUM *r, BIGNUM *a, int n);
      int BN_rshift1(BIGNUM *r, BIGNUM *a);


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     BN_set_bit() sets bit nnnn in aaaa to 1 (a|=(1<     expanded if necessary.

     BN_clear_bit() sets bit nnnn in aaaa to 0 (a&=~(1<     occurs if aaaa is shorter than nnnn bits.

     BN_is_bit_set() tests if bit nnnn in aaaa is set.

     BN_mask_bits() truncates aaaa to an nnnn bit number
     (a&=~((~0)>>n)).  An error occurs if aaaa already is shorter
     than nnnn bits.

     BN_lshift() shifts aaaa left by nnnn bits and places the result in
     rrrr (r=a*2^n). BN_lshift1() shifts aaaa left by one and places
     the result in rrrr (r=2*a).

     BN_rshift() shifts aaaa right by nnnn bits and places the result
     in rrrr (r=a/2^n). BN_rshift1() shifts aaaa right by one and
     places the result in rrrr (r=a/2).

     For the shift functions, rrrr and aaaa may be the same variable.

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     BN_is_bit_set() returns 1 if the bit is set, 0 otherwise.

     All other functions return 1 for success, 0 on error. The
     error codes can be obtained by ERR_get_error(3).





24/Feb/2000            Last change: 0.9.8o                      1






OpenSSL                                      BN_set_bit(3openssl)



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     bn(3), BN_num_bytes(3), BN_add(3)

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     BN_set_bit(), BN_clear_bit(), BN_is_bit_set(),
     BN_mask_bits(), BN_lshift(), BN_lshift1(), BN_rshift(), and
     BN_rshift1() are available in all versions of SSLeay and
     OpenSSL.















































24/Feb/2000            Last change: 0.9.8o                      2