Commit 94b3664a authored by Pascal Cuoq's avatar Pascal Cuoq Committed by Kurt Roeckx
Browse files

BN_GF2m_mod_inv(): check bn_wexpand return value 



Signed-off-by: default avatarKurt Roeckx <kurt@roeckx.be>
Reviewed-by: default avatarRich Salz <rsalz@akamai.com>

MR #1276, RT #4107
parent a528d4f0

crypto/bn/bn_gf2m.c

+6 −3
Original line number Diff line number Diff line
@@ -697,18 +697,21 @@ int BN_GF2m_mod_inv(BIGNUM *r, const BIGNUM *a, const BIGNUM *p, BN_CTX *ctx) 
        int top = p->top;

        BN_ULONG *udp, *bdp, *vdp, *cdp;



        bn_wexpand(u, top);

        if (!bn_wexpand(u, top))

            goto err;

        udp = u->d;

        for (i = u->top; i < top; i++)

            udp[i] = 0;

        u->top = top;

        bn_wexpand(b, top);

        if (!bn_wexpand(b, top))

          goto err;

        bdp = b->d;

        bdp[0] = 1;

        for (i = 1; i < top; i++)

            bdp[i] = 0;

        b->top = top;

        bn_wexpand(c, top);

        if (!bn_wexpand(c, top))

          goto err;

        cdp = c->d;

        for (i = 0; i < top; i++)

            cdp[i] = 0;