diff options
| author | Miod Vallat <miod@cvs.openbsd.org> | 2015-02-15 08:44:36 +0000 |
|---|---|---|
| committer | Miod Vallat <miod@cvs.openbsd.org> | 2015-02-15 08:44:36 +0000 |
| commit | 32cfabbaab063193d7db41296494aa4dcbfc60bc (patch) | |
| tree | 892f8782ded3e3d35b9247ea2d40cfa0ca53dc3c /lib/libcrypto | |
| parent | 88b1aa08d218622a18ad289c6d95fbcb6afc409a (diff) | |
In ec_wNAF_mul(), move the declaration of tmp_wNAF higher in scope, so that
all the function's exit paths can make sure it gets freed. Coverity CID 78861
tweaks & ok doug@ jsing@
Diffstat (limited to 'lib/libcrypto')
| -rw-r--r-- | lib/libcrypto/ec/ec_mult.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/lib/libcrypto/ec/ec_mult.c b/lib/libcrypto/ec/ec_mult.c index e7114135983..68f55cfcb34 100644 --- a/lib/libcrypto/ec/ec_mult.c +++ b/lib/libcrypto/ec/ec_mult.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ec_mult.c,v 1.17 2015/02/09 15:49:22 jsing Exp $ */ +/* $OpenBSD: ec_mult.c,v 1.18 2015/02/15 08:44:35 miod Exp $ */ /* * Originally written by Bodo Moeller and Nils Larsch for the OpenSSL project. */ @@ -348,6 +348,7 @@ ec_wNAF_mul(const EC_GROUP * group, EC_POINT * r, const BIGNUM * scalar, int r_is_at_infinity = 1; size_t *wsize = NULL; /* individual window sizes */ signed char **wNAF = NULL; /* individual wNAFs */ + signed char *tmp_wNAF = NULL; size_t *wNAF_len = NULL; size_t max_len = 0; size_t num_val; @@ -470,7 +471,6 @@ ec_wNAF_mul(const EC_GROUP * group, EC_POINT * r, const BIGNUM * scalar, } /* we have already generated a wNAF for 'scalar' */ } else { - signed char *tmp_wNAF = NULL; size_t tmp_len = 0; if (num_scalar != 0) { @@ -483,7 +483,7 @@ ec_wNAF_mul(const EC_GROUP * group, EC_POINT * r, const BIGNUM * scalar, */ wsize[num] = pre_comp->w; tmp_wNAF = compute_wNAF(scalar, wsize[num], &tmp_len); - if (!tmp_wNAF) + if (tmp_wNAF == NULL) goto err; if (tmp_len <= max_len) { @@ -497,6 +497,7 @@ ec_wNAF_mul(const EC_GROUP * group, EC_POINT * r, const BIGNUM * scalar, totalnum = num + 1; /* don't use wNAF * splitting */ wNAF[num] = tmp_wNAF; + tmp_wNAF = NULL; wNAF[num + 1] = NULL; wNAF_len[num] = tmp_len; if (tmp_len > max_len) @@ -553,7 +554,6 @@ ec_wNAF_mul(const EC_GROUP * group, EC_POINT * r, const BIGNUM * scalar, wNAF[i] = malloc(wNAF_len[i]); if (wNAF[i] == NULL) { ECerr(EC_F_EC_WNAF_MUL, ERR_R_MALLOC_FAILURE); - free(tmp_wNAF); goto err; } memcpy(wNAF[i], pp, wNAF_len[i]); @@ -562,14 +562,12 @@ ec_wNAF_mul(const EC_GROUP * group, EC_POINT * r, const BIGNUM * scalar, if (*tmp_points == NULL) { ECerr(EC_F_EC_WNAF_MUL, ERR_R_INTERNAL_ERROR); - free(tmp_wNAF); goto err; } val_sub[i] = tmp_points; tmp_points += pre_points_per_block; pp += blocksize; } - free(tmp_wNAF); } } } @@ -686,6 +684,7 @@ err: EC_POINT_free(tmp); free(wsize); free(wNAF_len); + free(tmp_wNAF); if (wNAF != NULL) { signed char **w; |