add mutex debugging

[xonotic/d0_blind_id.git] / d0_bignum-tommath.c

diff --git a/d0_bignum-tommath.c b/d0_bignum-tommath.c
index b2a39134dcf83be6421e7a261b2e598f7a3a6694..d78329f4ee8fe881ccd517399229af285578bd50 100644 (file)
--- a/d0_bignum-tommath.c
+++ b/d0_bignum-tommath.c
@@ -50,7 +50,8 @@ struct d0_bignum_s
        mp_int z;
 };
 
-static d0_bignum_t temp; // FIXME make threadsafe
+static d0_bignum_t temp;
+static void *tempmutex = NULL; // hold this mutex when using temp
 
 #include <stdio.h>
 
@@ -75,6 +76,10 @@ D0_WARN_UNUSED_RESULT D0_BOOL d0_bignum_INITIALIZE(void)
 {
        D0_BOOL ret = 1;
        unsigned char buf[256];
+
+       tempmutex = d0_createmutex();
+       d0_lockmutex(tempmutex);
+
        d0_bignum_init(&temp);
 #ifdef WIN32
        {
@@ -106,11 +111,15 @@ D0_WARN_UNUSED_RESULT D0_BOOL d0_bignum_INITIALIZE(void)
        }
 #endif
 
+       d0_unlockmutex(tempmutex);
+
        return ret;
 }
 
 void d0_bignum_SHUTDOWN(void)
 {
+       d0_lockmutex(tempmutex);
+
        d0_bignum_clear(&temp);
 #ifdef WIN32
        if(hCryptProv)
@@ -119,6 +128,10 @@ void d0_bignum_SHUTDOWN(void)
                hCryptProv = NULL;
        }
 #endif
+
+       d0_unlockmutex(tempmutex);
+       d0_destroymutex(tempmutex);
+       tempmutex = NULL;
 }
 
 D0_BOOL d0_iobuf_write_bignum(d0_iobuf_t *buf, const d0_bignum_t *bignum)
@@ -260,31 +273,52 @@ static d0_bignum_t *d0_bignum_rand_0_to_limit(d0_bignum_t *r, const d0_bignum_t
 
 d0_bignum_t *d0_bignum_rand_range(d0_bignum_t *r, const d0_bignum_t *min, const d0_bignum_t *max)
 {
+       d0_lockmutex(tempmutex);
        mp_sub((mp_int *) &max->z, (mp_int *) &min->z, &temp.z);
        r = d0_bignum_rand_0_to_limit(r, &temp);
+       d0_unlockmutex(tempmutex);
        mp_add((mp_int *) &r->z, (mp_int *) &min->z, &r->z);
        return r;
 }
 
 d0_bignum_t *d0_bignum_rand_bit_atmost(d0_bignum_t *r, size_t n)
 {
+       d0_lockmutex(tempmutex);
        if(!d0_bignum_one(&temp))
+       {
+               d0_unlockmutex(tempmutex);
                return NULL;
+       }
        if(!d0_bignum_shl(&temp, &temp, n))
+       {
+               d0_unlockmutex(tempmutex);
                return NULL;
+       }
        r = d0_bignum_rand_0_to_limit(r, &temp);
+       d0_unlockmutex(tempmutex);
        return r;
 }
 
 d0_bignum_t *d0_bignum_rand_bit_exact(d0_bignum_t *r, size_t n)
 {
+       d0_lockmutex(tempmutex);
        if(!d0_bignum_one(&temp))
+       {
+               d0_unlockmutex(tempmutex);
                return NULL;
+       }
        if(!d0_bignum_shl(&temp, &temp, n-1))
+       {
+               d0_unlockmutex(tempmutex);
                return NULL;
+       }
        r = d0_bignum_rand_0_to_limit(r, &temp);
        if(!d0_bignum_add(r, r, &temp))
+       {
+               d0_unlockmutex(tempmutex);
                return NULL;
+       }
+       d0_unlockmutex(tempmutex);
        return r;
 }