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Diffstat (limited to 'engines/ccgost/gost2001.c')
-rw-r--r--engines/ccgost/gost2001.c229
1 files changed, 178 insertions, 51 deletions
diff --git a/engines/ccgost/gost2001.c b/engines/ccgost/gost2001.c
index 2b96694821e2..9536295430d0 100644
--- a/engines/ccgost/gost2001.c
+++ b/engines/ccgost/gost2001.c
@@ -41,6 +41,11 @@ int fill_GOST2001_params(EC_KEY *eckey, int nid)
BN_CTX *ctx = BN_CTX_new();
int ok = 0;
+ if(!ctx) {
+ GOSTerr(GOST_F_FILL_GOST2001_PARAMS, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
BN_CTX_start(ctx);
p = BN_CTX_get(ctx);
a = BN_CTX_get(ctx);
@@ -48,6 +53,10 @@ int fill_GOST2001_params(EC_KEY *eckey, int nid)
x = BN_CTX_get(ctx);
y = BN_CTX_get(ctx);
q = BN_CTX_get(ctx);
+ if(!p || !a || !b || !x || !y || !q) {
+ GOSTerr(GOST_F_FILL_GOST2001_PARAMS, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
while (params->nid != NID_undef && params->nid != nid)
params++;
if (params->nid == NID_undef) {
@@ -55,18 +64,33 @@ int fill_GOST2001_params(EC_KEY *eckey, int nid)
GOST_R_UNSUPPORTED_PARAMETER_SET);
goto err;
}
- BN_hex2bn(&p, params->p);
- BN_hex2bn(&a, params->a);
- BN_hex2bn(&b, params->b);
+ if(!BN_hex2bn(&p, params->p)
+ || !BN_hex2bn(&a, params->a)
+ || !BN_hex2bn(&b, params->b)) {
+ GOSTerr(GOST_F_FILL_GOST2001_PARAMS,
+ ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
grp = EC_GROUP_new_curve_GFp(p, a, b, ctx);
+ if(!grp) {
+ GOSTerr(GOST_F_FILL_GOST2001_PARAMS, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
P = EC_POINT_new(grp);
+ if(!P) {
+ GOSTerr(GOST_F_FILL_GOST2001_PARAMS, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
- BN_hex2bn(&x, params->x);
- BN_hex2bn(&y, params->y);
- EC_POINT_set_affine_coordinates_GFp(grp, P, x, y, ctx);
- BN_hex2bn(&q, params->q);
+ if(!BN_hex2bn(&x, params->x)
+ || !BN_hex2bn(&y, params->y)
+ || !EC_POINT_set_affine_coordinates_GFp(grp, P, x, y, ctx)
+ || !BN_hex2bn(&q, params->q)) {
+ GOSTerr(GOST_F_FILL_GOST2001_PARAMS, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
#ifdef DEBUG_KEYS
fprintf(stderr, "Set params index %d oid %s\nq=",
(params - R3410_2001_paramset), OBJ_nid2sn(params->nid));
@@ -74,16 +98,23 @@ int fill_GOST2001_params(EC_KEY *eckey, int nid)
fprintf(stderr, "\n");
#endif
- EC_GROUP_set_generator(grp, P, q, NULL);
+ if(!EC_GROUP_set_generator(grp, P, q, NULL)) {
+ GOSTerr(GOST_F_FILL_GOST2001_PARAMS, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
EC_GROUP_set_curve_name(grp, params->nid);
-
- EC_KEY_set_group(eckey, grp);
+ if(!EC_KEY_set_group(eckey, grp)) {
+ GOSTerr(GOST_F_FILL_GOST2001_PARAMS, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
ok = 1;
err:
- EC_POINT_free(P);
- EC_GROUP_free(grp);
- BN_CTX_end(ctx);
- BN_CTX_free(ctx);
+ if (P) EC_POINT_free(P);
+ if (grp) EC_GROUP_free(grp);
+ if (ctx) {
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx);
+ }
return ok;
}
@@ -94,7 +125,7 @@ int fill_GOST2001_params(EC_KEY *eckey, int nid)
*/
DSA_SIG *gost2001_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
{
- DSA_SIG *newsig = NULL;
+ DSA_SIG *newsig = NULL, *ret = NULL;
BIGNUM *md = hashsum2bn(dgst);
BIGNUM *order = NULL;
const EC_GROUP *group;
@@ -103,6 +134,10 @@ DSA_SIG *gost2001_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
NULL, *e = NULL;
EC_POINT *C = NULL;
BN_CTX *ctx = BN_CTX_new();
+ if(!ctx || !md) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
BN_CTX_start(ctx);
OPENSSL_assert(dlen == 32);
newsig = DSA_SIG_new();
@@ -111,11 +146,25 @@ DSA_SIG *gost2001_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
goto err;
}
group = EC_KEY_get0_group(eckey);
+ if(!group) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
order = BN_CTX_get(ctx);
- EC_GROUP_get_order(group, order, ctx);
+ if(!order || !EC_GROUP_get_order(group, order, ctx)) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
priv_key = EC_KEY_get0_private_key(eckey);
+ if(!priv_key) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
e = BN_CTX_get(ctx);
- BN_mod(e, md, order, ctx);
+ if(!e || !BN_mod(e, md, order, ctx)) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
#ifdef DEBUG_SIGN
fprintf(stderr, "digest as bignum=");
BN_print_fp(stderr, md);
@@ -128,55 +177,80 @@ DSA_SIG *gost2001_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
}
k = BN_CTX_get(ctx);
C = EC_POINT_new(group);
+ if(!k || !C) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
do {
do {
if (!BN_rand_range(k, order)) {
GOSTerr(GOST_F_GOST2001_DO_SIGN,
GOST_R_RANDOM_NUMBER_GENERATOR_FAILED);
- DSA_SIG_free(newsig);
- newsig = NULL;
goto err;
}
if (!EC_POINT_mul(group, C, k, NULL, NULL, ctx)) {
GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_EC_LIB);
- DSA_SIG_free(newsig);
- newsig = NULL;
goto err;
}
if (!X)
X = BN_CTX_get(ctx);
+ if (!r)
+ r = BN_CTX_get(ctx);
+ if (!X || !r) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
if (!EC_POINT_get_affine_coordinates_GFp(group, C, X, NULL, ctx)) {
GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_EC_LIB);
- DSA_SIG_free(newsig);
- newsig = NULL;
goto err;
}
- if (!r)
- r = BN_CTX_get(ctx);
- BN_nnmod(r, X, order, ctx);
+
+ if(!BN_nnmod(r, X, order, ctx)) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
}
while (BN_is_zero(r));
/* s = (r*priv_key+k*e) mod order */
if (!tmp)
tmp = BN_CTX_get(ctx);
- BN_mod_mul(tmp, priv_key, r, order, ctx);
if (!tmp2)
tmp2 = BN_CTX_get(ctx);
- BN_mod_mul(tmp2, k, e, order, ctx);
if (!s)
s = BN_CTX_get(ctx);
- BN_mod_add(s, tmp, tmp2, order, ctx);
+ if (!tmp || !tmp2 || !s) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if(!BN_mod_mul(tmp, priv_key, r, order, ctx)
+ || !BN_mod_mul(tmp2, k, e, order, ctx)
+ || !BN_mod_add(s, tmp, tmp2, order, ctx)) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
}
while (BN_is_zero(s));
newsig->s = BN_dup(s);
newsig->r = BN_dup(r);
+ if(!newsig->s || !newsig->r) {
+ GOSTerr(GOST_F_GOST2001_DO_SIGN, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ ret = newsig;
err:
- BN_CTX_end(ctx);
- BN_CTX_free(ctx);
- EC_POINT_free(C);
- BN_free(md);
- return newsig;
+ if(ctx) {
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx);
+ }
+ if (C) EC_POINT_free(C);
+ if (md) BN_free(md);
+ if (!ret && newsig) {
+ DSA_SIG_free(newsig);
+ }
+ return ret;
}
/*
@@ -196,6 +270,11 @@ int gost2001_do_verify(const unsigned char *dgst, int dgst_len,
const EC_POINT *pub_key = NULL;
int ok = 0;
+ if(!ctx || !group) {
+ GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
BN_CTX_start(ctx);
order = BN_CTX_get(ctx);
e = BN_CTX_get(ctx);
@@ -205,9 +284,17 @@ int gost2001_do_verify(const unsigned char *dgst, int dgst_len,
X = BN_CTX_get(ctx);
R = BN_CTX_get(ctx);
v = BN_CTX_get(ctx);
+ if(!order || !e || !z1 || !z2 || !tmp || !X || !R || !v) {
+ GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
- EC_GROUP_get_order(group, order, ctx);
pub_key = EC_KEY_get0_public_key(ec);
+ if(!pub_key || !EC_GROUP_get_order(group, order, ctx)) {
+ GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
if (BN_is_zero(sig->s) || BN_is_zero(sig->r) ||
(BN_cmp(sig->s, order) >= 1) || (BN_cmp(sig->r, order) >= 1)) {
GOSTerr(GOST_F_GOST2001_DO_VERIFY,
@@ -217,19 +304,28 @@ int gost2001_do_verify(const unsigned char *dgst, int dgst_len,
}
md = hashsum2bn(dgst);
- BN_mod(e, md, order, ctx);
+ if(!md || !BN_mod(e, md, order, ctx)) {
+ GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
#ifdef DEBUG_SIGN
fprintf(stderr, "digest as bignum: ");
BN_print_fp(stderr, md);
fprintf(stderr, "\ndigest mod q: ");
BN_print_fp(stderr, e);
#endif
- if (BN_is_zero(e))
- BN_one(e);
+ if (BN_is_zero(e) && !BN_one(e)) {
+ GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
v = BN_mod_inverse(v, e, order, ctx);
- BN_mod_mul(z1, sig->s, v, order, ctx);
- BN_sub(tmp, order, sig->r);
- BN_mod_mul(z2, tmp, v, order, ctx);
+ if(!v
+ || !BN_mod_mul(z1, sig->s, v, order, ctx)
+ || !BN_sub(tmp, order, sig->r)
+ || !BN_mod_mul(z2, tmp, v, order, ctx)) {
+ GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
#ifdef DEBUG_SIGN
fprintf(stderr, "\nInverted digest value: ");
BN_print_fp(stderr, v);
@@ -239,6 +335,10 @@ int gost2001_do_verify(const unsigned char *dgst, int dgst_len,
BN_print_fp(stderr, z2);
#endif
C = EC_POINT_new(group);
+ if (!C) {
+ GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
if (!EC_POINT_mul(group, C, z1, pub_key, z2, ctx)) {
GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_EC_LIB);
goto err;
@@ -247,7 +347,10 @@ int gost2001_do_verify(const unsigned char *dgst, int dgst_len,
GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_EC_LIB);
goto err;
}
- BN_mod(R, X, order, ctx);
+ if(!BN_mod(R, X, order, ctx)) {
+ GOSTerr(GOST_F_GOST2001_DO_VERIFY, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
#ifdef DEBUG_SIGN
fprintf(stderr, "\nX=");
BN_print_fp(stderr, X);
@@ -261,10 +364,12 @@ int gost2001_do_verify(const unsigned char *dgst, int dgst_len,
ok = 1;
}
err:
- EC_POINT_free(C);
- BN_CTX_end(ctx);
- BN_CTX_free(ctx);
- BN_free(md);
+ if (C) EC_POINT_free(C);
+ if (ctx) {
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx);
+ }
+ if (md) BN_free(md);
return ok;
}
@@ -287,6 +392,10 @@ int gost2001_compute_public(EC_KEY *ec)
return 0;
}
ctx = BN_CTX_new();
+ if(!ctx) {
+ GOSTerr(GOST_F_GOST2001_COMPUTE_PUBLIC, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
BN_CTX_start(ctx);
if (!(priv_key = EC_KEY_get0_private_key(ec))) {
GOSTerr(GOST_F_GOST2001_COMPUTE_PUBLIC, ERR_R_EC_LIB);
@@ -294,6 +403,10 @@ int gost2001_compute_public(EC_KEY *ec)
}
pub_key = EC_POINT_new(group);
+ if(!pub_key) {
+ GOSTerr(GOST_F_GOST2001_COMPUTE_PUBLIC, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
if (!EC_POINT_mul(group, pub_key, priv_key, NULL, NULL, ctx)) {
GOSTerr(GOST_F_GOST2001_COMPUTE_PUBLIC, ERR_R_EC_LIB);
goto err;
@@ -304,9 +417,11 @@ int gost2001_compute_public(EC_KEY *ec)
}
ok = 256;
err:
- BN_CTX_end(ctx);
- EC_POINT_free(pub_key);
- BN_CTX_free(ctx);
+ if (pub_key) EC_POINT_free(pub_key);
+ if (ctx) {
+ BN_CTX_end(ctx);
+ BN_CTX_free(ctx);
+ }
return ok;
}
@@ -320,7 +435,13 @@ int gost2001_keygen(EC_KEY *ec)
{
BIGNUM *order = BN_new(), *d = BN_new();
const EC_GROUP *group = EC_KEY_get0_group(ec);
- EC_GROUP_get_order(group, order, NULL);
+
+ if(!group || !EC_GROUP_get_order(group, order, NULL)) {
+ GOSTerr(GOST_F_GOST2001_KEYGEN, ERR_R_INTERNAL_ERROR);
+ BN_free(d);
+ BN_free(order);
+ return 0;
+ }
do {
if (!BN_rand_range(d, order)) {
@@ -332,7 +453,13 @@ int gost2001_keygen(EC_KEY *ec)
}
}
while (BN_is_zero(d));
- EC_KEY_set_private_key(ec, d);
+
+ if(!EC_KEY_set_private_key(ec, d)) {
+ GOSTerr(GOST_F_GOST2001_KEYGEN, ERR_R_INTERNAL_ERROR);
+ BN_free(d);
+ BN_free(order);
+ return 0;
+ }
BN_free(d);
BN_free(order);
return gost2001_compute_public(ec);