Fix handle leak in winhandl.c.

[PuTTY.git] / sshbn.c

diff --git a/sshbn.c b/sshbn.c
index 1c5c46a1eb8746862e6b5cf45e63cbaa3b9c5ced..b1ea5d63c488cde28e8744285a2368601863f56b 100644 (file)
--- a/sshbn.c
+++ b/sshbn.c
@@ -607,6 +607,7 @@ static void internal_add_shifted(BignumInt *number,
     addend = (BignumDblInt)n << bshift;
 
     while (addend) {
+        assert(word <= number[0]);
        addend += number[word];
        number[word] = (BignumInt) addend & BIGNUM_INT_MASK;
        addend >>= BIGNUM_INT_BITS;
@@ -1609,6 +1610,8 @@ Bignum bigdiv(Bignum a, Bignum b)
 {
     Bignum q = newbn(a[0]);
     bigdivmod(a, b, NULL, q);
+    while (q[0] > 1 && q[q[0]] == 0)
+        q[0]--;
     return q;
 }
 
@@ -1619,6 +1622,8 @@ Bignum bigmod(Bignum a, Bignum b)
 {
     Bignum r = newbn(b[0]);
     bigdivmod(a, b, r, NULL);
+    while (r[0] > 1 && r[r[0]] == 0)
+        r[0]--;
     return r;
 }
 
@@ -1678,6 +1683,8 @@ Bignum modinv(Bignum number, Bignum modulus)
        bigdivmod(a, b, t, q);
        while (t[0] > 1 && t[t[0]] == 0)
            t[0]--;
+       while (q[0] > 1 && q[q[0]] == 0)
+           q[0]--;
        freebn(a);
        a = b;
        b = t;