diff options
Diffstat (limited to 'openssl/crypto/bn/bn_shift.c')
| -rw-r--r-- | openssl/crypto/bn/bn_shift.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/openssl/crypto/bn/bn_shift.c b/openssl/crypto/bn/bn_shift.c index 4f3e8ffed..9673d9a30 100644 --- a/openssl/crypto/bn/bn_shift.c +++ b/openssl/crypto/bn/bn_shift.c @@ -137,6 +137,11 @@ int BN_lshift(BIGNUM *r, const BIGNUM *a, int n) bn_check_top(r); bn_check_top(a); + if (n < 0) { + BNerr(BN_F_BN_LSHIFT, BN_R_INVALID_SHIFT); + return 0; + } + r->neg = a->neg; nw = n / BN_BITS2; if (bn_wexpand(r, a->top + nw + 1) == NULL) @@ -174,6 +179,11 @@ int BN_rshift(BIGNUM *r, const BIGNUM *a, int n) bn_check_top(r); bn_check_top(a); + if (n < 0) { + BNerr(BN_F_BN_RSHIFT, BN_R_INVALID_SHIFT); + return 0; + } + nw = n / BN_BITS2; rb = n % BN_BITS2; lb = BN_BITS2 - rb; |