static int witness(BIGNUM *w, const BIGNUM *a, const BIGNUM *a1,
const BIGNUM *a1_odd, int k, BN_CTX *ctx, BN_MONT_CTX *mont);
static int probable_prime(BIGNUM *rnd, int bits);
-static int probable_prime_dh(BIGNUM *rnd, int bits,
- const BIGNUM *add, const BIGNUM *rem, BN_CTX *ctx);
static int probable_prime_dh_safe(BIGNUM *rnd, int bits,
const BIGNUM *add, const BIGNUM *rem, BN_CTX *ctx);
}
else
{
- if (!probable_prime_dh(ret,bits,add,rem,ctx))
+ if (!bn_probable_prime_dh(ret,bits,add,rem,ctx))
goto err;
}
}
return(ret);
}
+int bn_probable_prime_dh(BIGNUM *rnd, int bits,
+ const BIGNUM *add, const BIGNUM *rem, BN_CTX *ctx)
+ {
+ int i,ret=0;
+ BIGNUM *t1;
+
+ BN_CTX_start(ctx);
+ if ((t1 = BN_CTX_get(ctx)) == NULL) goto err;
+
+ if (!BN_rand(rnd,bits,0,1)) goto err;
+
+ /* we need ((rnd-rem) % add) == 0 */
+
+ if (!BN_mod(t1,rnd,add,ctx)) goto err;
+ if (!BN_sub(rnd,rnd,t1)) goto err;
+ if (rem == NULL)
+ { if (!BN_add_word(rnd,1)) goto err; }
+ else
+ { if (!BN_add(rnd,rnd,rem)) goto err; }
+
+ /* we now have a random number 'rand' to test. */
+
+loop:
+ for (i=1; i<NUMPRIMES; i++)
+ {
+ /* check that rnd is a prime */
+ if (BN_mod_word(rnd,(BN_ULONG)primes[i]) <= 1)
+ {
+ if (!BN_add(rnd,rnd,add)) goto err;
+ goto loop;
+ }
+ }
+ ret=1;
+err:
+ BN_CTX_end(ctx);
+ bn_check_top(rnd);
+ return(ret);
+ }
+
static int witness(BIGNUM *w, const BIGNUM *a, const BIGNUM *a1,
const BIGNUM *a1_odd, int k, BN_CTX *ctx, BN_MONT_CTX *mont)
{
maxdelta = size_limit;
}
delta=0;
- loop:
+loop:
if (is_single_word)
{
BN_ULONG rnd_word = BN_get_word(rnd);
return(1);
}
-static int probable_prime_dh(BIGNUM *rnd, int bits,
- const BIGNUM *add, const BIGNUM *rem, BN_CTX *ctx)
- {
- int i,ret=0;
- BIGNUM *t1;
-
- BN_CTX_start(ctx);
- if ((t1 = BN_CTX_get(ctx)) == NULL) goto err;
-
- if (!BN_rand(rnd,bits,0,1)) goto err;
-
- /* we need ((rnd-rem) % add) == 0 */
-
- if (!BN_mod(t1,rnd,add,ctx)) goto err;
- if (!BN_sub(rnd,rnd,t1)) goto err;
- if (rem == NULL)
- { if (!BN_add_word(rnd,1)) goto err; }
- else
- { if (!BN_add(rnd,rnd,rem)) goto err; }
-
- /* we now have a random number 'rand' to test. */
-
- loop: for (i=1; i<NUMPRIMES; i++)
- {
- /* check that rnd is a prime */
- if (BN_mod_word(rnd,(BN_ULONG)primes[i]) <= 1)
- {
- if (!BN_add(rnd,rnd,add)) goto err;
- goto loop;
- }
- }
- ret=1;
-err:
- BN_CTX_end(ctx);
- bn_check_top(rnd);
- return(ret);
- }
-
static int probable_prime_dh_safe(BIGNUM *p, int bits, const BIGNUM *padd,
const BIGNUM *rem, BN_CTX *ctx)
{
if (!BN_lshift1(p,q)) goto err;
if (!BN_add_word(p,1)) goto err;
- loop: for (i=1; i<NUMPRIMES; i++)
+loop:
+ for (i=1; i<NUMPRIMES; i++)
{
/* check that p and q are prime */
/* check that for p and q