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local ffi = require "ffi"
require "resty.openssl.include.ossl_typ"
local OPENSSL_3X = require("resty.openssl.version").OPENSSL_3X
local BN_ULONG
if ffi.abi('64bit') then
BN_ULONG = 'unsigned long long'
else -- 32bit
BN_ULONG = 'unsigned int'
end
ffi.cdef(
[[
BIGNUM *BN_new(void);
void BN_free(BIGNUM *a);
BN_CTX *BN_CTX_new(void);
void BN_CTX_init(BN_CTX *c);
void BN_CTX_free(BN_CTX *c);
BIGNUM *BN_dup(const BIGNUM *a);
int BN_add_word(BIGNUM *a, ]] .. BN_ULONG ..[[ w);
int BN_set_word(BIGNUM *a, ]] .. BN_ULONG ..[[ w);
]] .. BN_ULONG ..[[ BN_get_word(BIGNUM *a);
int BN_num_bits(const BIGNUM *a);
BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret);
int BN_hex2bn(BIGNUM **a, const char *str);
int BN_dec2bn(BIGNUM **a, const char *str);
int BN_bn2bin(const BIGNUM *a, unsigned char *to);
char *BN_bn2hex(const BIGNUM *a);
char *BN_bn2dec(const BIGNUM *a);
void BN_set_negative(BIGNUM *a, int n);
int BN_is_negative(const BIGNUM *a);
int BN_add(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
int BN_sub(BIGNUM *r, const BIGNUM *a, const BIGNUM *b);
int BN_mul(BIGNUM *r, BIGNUM *a, BIGNUM *b, BN_CTX *ctx);
int BN_sqr(BIGNUM *r, BIGNUM *a, BN_CTX *ctx);
int BN_div(BIGNUM *dv, BIGNUM *rem, const BIGNUM *a, const BIGNUM *d,
BN_CTX *ctx);
int BN_mod_add(BIGNUM *ret, BIGNUM *a, BIGNUM *b, const BIGNUM *m,
BN_CTX *ctx);
int BN_mod_sub(BIGNUM *ret, BIGNUM *a, BIGNUM *b, const BIGNUM *m,
BN_CTX *ctx);
int BN_mod_mul(BIGNUM *ret, BIGNUM *a, BIGNUM *b, const BIGNUM *m,
BN_CTX *ctx);
int BN_mod_sqr(BIGNUM *ret, BIGNUM *a, const BIGNUM *m, BN_CTX *ctx);
int BN_exp(BIGNUM *r, BIGNUM *a, BIGNUM *p, BN_CTX *ctx);
int BN_mod_exp(BIGNUM *r, BIGNUM *a, const BIGNUM *p,
const BIGNUM *m, BN_CTX *ctx);
int BN_gcd(BIGNUM *r, BIGNUM *a, BIGNUM *b, BN_CTX *ctx);
int BN_lshift(BIGNUM *r, const BIGNUM *a, int n);
int BN_rshift(BIGNUM *r, BIGNUM *a, int n);
int BN_cmp(BIGNUM *a, BIGNUM *b);
int BN_ucmp(BIGNUM *a, BIGNUM *b);
// openssl >= 1.1 only
int BN_is_zero(BIGNUM *a);
int BN_is_one(BIGNUM *a);
int BN_is_word(BIGNUM *a, ]] .. BN_ULONG ..[[ w);
int BN_is_odd(BIGNUM *a);
int BN_is_prime_ex(const BIGNUM *p,int nchecks, BN_CTX *ctx, BN_GENCB *cb);
int BN_generate_prime_ex(BIGNUM *ret,int bits,int safe, const BIGNUM *add,
const BIGNUM *rem, BN_GENCB *cb);
]]
)
if OPENSSL_3X then
ffi.cdef [[
int BN_check_prime(const BIGNUM *p, BN_CTX *ctx, BN_GENCB *cb);
]]
end
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