diff options
| author | Bodo Möller <bodo@openssl.org> | 2000-11-26 16:42:38 +0000 |
|---|---|---|
| committer | Bodo Möller <bodo@openssl.org> | 2000-11-26 16:42:38 +0000 |
| commit | 78a0c1f18d5a1f0e51b7467ef7b153b8c29fbb03 (patch) | |
| tree | 631b1606ee2f90a5fcaf2f141461113d30c7f5a8 /crypto/bn/bn_recp.c | |
| parent | 6cc5e19d4710d7d3355bf6fa05c3d7269e48428f (diff) | |
| download | openssl-new-78a0c1f18d5a1f0e51b7467ef7b153b8c29fbb03.tar.gz | |
modular arithmetics
"make update"
Diffstat (limited to 'crypto/bn/bn_recp.c')
| -rw-r--r-- | crypto/bn/bn_recp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/crypto/bn/bn_recp.c b/crypto/bn/bn_recp.c index a175e1c5f2..0700a0f063 100644 --- a/crypto/bn/bn_recp.c +++ b/crypto/bn/bn_recp.c @@ -167,7 +167,8 @@ int BN_div_recp(BIGNUM *dv, BIGNUM *rem, const BIGNUM *m, if (i != recp->shift) recp->shift=BN_reciprocal(&(recp->Nr),&(recp->N), - i,ctx); + i,ctx); /* BN_reciprocal returns i, or -1 for an error */ + if (recp->shift == -1) goto err; if (!BN_rshift(a,m,j)) goto err; if (!BN_mul(b,a,&(recp->Nr),ctx)) goto err; @@ -203,6 +204,7 @@ err: * We actually calculate with an extra word of precision, so * we can do faster division if the remainder is not required. */ +/* r := 2^len / m */ int BN_reciprocal(BIGNUM *r, const BIGNUM *m, int len, BN_CTX *ctx) { int ret= -1; |