diff options
| author | Geoff Thorpe <geoff@openssl.org> | 2003-11-04 22:54:49 +0000 |
|---|---|---|
| committer | Geoff Thorpe <geoff@openssl.org> | 2003-11-04 22:54:49 +0000 |
| commit | d870740cd75dd4f0cb66fb8c32653a7d47369706 (patch) | |
| tree | 0c6cb1ce0b1083c96419c432d1f05c3dff51320d /crypto/bn/bn_mod.c | |
| parent | d8ec0dcf457f4dec39f137657b702fcbeaf5cc04 (diff) | |
Put the first stage of my bignum debugging adventures into CVS. This code
is itself experimental, and in addition may cause execution to break on
existing openssl "bugs" that previously were harmless or at least
invisible.
Diffstat (limited to 'crypto/bn/bn_mod.c')
| -rw-r--r-- | crypto/bn/bn_mod.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/crypto/bn/bn_mod.c b/crypto/bn/bn_mod.c index 5cf82480d7..61b7255098 100644 --- a/crypto/bn/bn_mod.c +++ b/crypto/bn/bn_mod.c @@ -192,6 +192,7 @@ int BN_mod_mul(BIGNUM *r, const BIGNUM *a, const BIGNUM *b, const BIGNUM *m, else { if (!BN_mul(t,a,b,ctx)) goto err; } if (!BN_nnmod(r,t,m,ctx)) goto err; + bn_check_top(r); ret=1; err: BN_CTX_end(ctx); @@ -210,6 +211,7 @@ int BN_mod_sqr(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx) int BN_mod_lshift1(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx) { if (!BN_lshift1(r, a)) return 0; + bn_check_top(r); return BN_nnmod(r, r, m, ctx); } @@ -219,6 +221,7 @@ int BN_mod_lshift1(BIGNUM *r, const BIGNUM *a, const BIGNUM *m, BN_CTX *ctx) int BN_mod_lshift1_quick(BIGNUM *r, const BIGNUM *a, const BIGNUM *m) { if (!BN_lshift1(r, a)) return 0; + bn_check_top(r); if (BN_cmp(r, m) >= 0) return BN_sub(r, r, m); return 1; @@ -240,6 +243,7 @@ int BN_mod_lshift(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m, BN_CTX *ct } ret = BN_mod_lshift_quick(r, r, n, (abs_m ? abs_m : m)); + bn_check_top(r); if (abs_m) BN_free(abs_m); @@ -291,6 +295,7 @@ int BN_mod_lshift_quick(BIGNUM *r, const BIGNUM *a, int n, const BIGNUM *m) if (!BN_sub(r, r, m)) return 0; } } + bn_check_top(r); return 1; } |