diff options
| -rw-r--r-- | src/openssl.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/openssl.c b/src/openssl.c index 5ff80fe..ba6e9b6 100644 --- a/src/openssl.c +++ b/src/openssl.c @@ -2798,6 +2798,20 @@ static void bn_prepbop(lua_State *L, BIGNUM **r, BIGNUM **a, BIGNUM **b, _Bool c } /* bn_prepbop() */ +/* prepare numbers at top of stack for ternary operation, and push result object onto stack */ +static void bn_preptop(lua_State *L, BIGNUM **r, BIGNUM **a, BIGNUM **b, BIGNUM **c) { + _Bool a_lvalue, b_lvalue, c_lvalue; + + *a = checkbig(L, 1, &a_lvalue); + *b = checkbig(L, 2, &b_lvalue); + *c = checkbig(L, 3, &c_lvalue); + + bn_push(L); + + *r = *(BIGNUM **)lua_touserdata(L, -1); +} /* bn_preptop() */ + + static int ctx__gc(lua_State *L) { BN_CTX **ctx = lua_touserdata(L, 1); @@ -2959,6 +2973,19 @@ static int bn__pow(lua_State *L) { } /* bn__pow() */ +static int bn_mod_exp(lua_State *L) { + BIGNUM *r, *a, *b, *c; + + lua_settop(L, 3); + bn_preptop(L, &r, &a, &b, &c); + + if (!BN_mod_exp(r, a, b, c, getctx(L))) + return auxL_error(L, auxL_EOPENSSL, "bignum:mod_exp"); + + return 1; +} /* bn_mod_exp() */ + + static int bn_gcd(lua_State *L) { BIGNUM *r, *a, *b; @@ -3153,6 +3180,7 @@ static const auxL_Reg bn_methods[] = { { "mod", &bn__mod }, { "nnmod", &bn_nnmod }, { "exp", &bn__pow }, + { "mod_exp", &bn_mod_exp }, { "gcd", &bn_gcd }, { "lshift", &bn__shl }, { "rshift", &bn__shr }, |