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BN_mod_mul_reciprocal(3)
NAMEBN_mod_mul_reciprocal, BN_div_recp, BN_RECP_CTX_new, BN_RECP_CTX_init, BN_RECP_CTX_free, BN_RECP_CTX_set - modular multiplication using reciprocal
SYNOPSIS#include <openssl/bn.h> BN_RECP_CTX *BN_RECP_CTX_new(void); void BN_RECP_CTX_init(BN_RECP_CTX *recp); void BN_RECP_CTX_free(BN_RECP_CTX *recp); int BN_RECP_CTX_set(BN_RECP_CTX *recp, const BIGNUM *m, BN_CTX *ctx); int BN_div_recp(BIGNUM *dv, BIGNUM *rem, BIGNUM *a, BN_RECP_CTX *recp, BN_CTX *ctx); int BN_mod_mul_reciprocal(BIGNUM *r, BIGNUM *a, BIGNUM *b, BN_RECP_CTX *recp, BN_CTX *ctx);
DESCRIPTION
The BN_RECP_CTX structure is defined as follows: typedef struct bn_recp_ctx_st { BIGNUM N; /* the divisor */ BIGNUM Nr; /* the reciprocal */ int num_bits; int shift; int flags; } BN_RECP_CTX; It cannot be shared between threads.
RETURN VALUES
For the other functions, 1 is returned for success, 0 on error. The error codes can be obtained by ERR_get_error(3).
SEE ALSObn(3), ERR_get_error(3), BN_add(3), BN_CTX_new(3)
HISTORY
BN_RECP_CTX was added in SSLeay 0.9.0. Before that, the function
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