summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--crypto/dsa/dsa_ameth.c4
-rw-r--r--crypto/dsa/dsa_asn1.c13
-rw-r--r--crypto/dsa/dsa_locl.h5
-rw-r--r--crypto/dsa/dsa_ossl.c21
-rw-r--r--crypto/ec/ec_asn1.c2
-rw-r--r--doc/crypto/DSA_SIG_new.pod6
-rw-r--r--doc/crypto/ECDSA_SIG_new.pod4
-rw-r--r--include/openssl/dsa.h2
-rw-r--r--include/openssl/ec.h2
-rw-r--r--test/ecdsatest.c39
10 files changed, 56 insertions, 42 deletions
diff --git a/crypto/dsa/dsa_ameth.c b/crypto/dsa/dsa_ameth.c
index b30368e32e..c7573bf256 100644
--- a/crypto/dsa/dsa_ameth.c
+++ b/crypto/dsa/dsa_ameth.c
@@ -437,9 +437,9 @@ static int dsa_sig_print(BIO *bp, const X509_ALGOR *sigalg,
dsa_sig = d2i_DSA_SIG(NULL, &p, sig->length);
if (dsa_sig) {
int rv = 0;
- BIGNUM *r, *s;
+ const BIGNUM *r, *s;
- DSA_SIG_get0(&r, &s, dsa_sig);
+ DSA_SIG_get0(dsa_sig, &r, &s);
if (BIO_write(bp, "\n", 1) != 1)
goto err;
diff --git a/crypto/dsa/dsa_asn1.c b/crypto/dsa/dsa_asn1.c
index f79e1d1404..540d01fdce 100644
--- a/crypto/dsa/dsa_asn1.c
+++ b/crypto/dsa/dsa_asn1.c
@@ -14,11 +14,6 @@
#include <openssl/asn1t.h>
#include <openssl/rand.h>
-struct DSA_SIG_st {
- BIGNUM *r;
- BIGNUM *s;
-};
-
ASN1_SEQUENCE(DSA_SIG) = {
ASN1_SIMPLE(DSA_SIG, r, CBIGNUM),
ASN1_SIMPLE(DSA_SIG, s, CBIGNUM)
@@ -26,10 +21,12 @@ ASN1_SEQUENCE(DSA_SIG) = {
IMPLEMENT_ASN1_FUNCTIONS_const(DSA_SIG)
-void DSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const DSA_SIG *sig)
+void DSA_SIG_get0(const DSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps)
{
- *pr = sig->r;
- *ps = sig->s;
+ if (pr != NULL)
+ *pr = sig->r;
+ if (ps != NULL)
+ *ps = sig->s;
}
int DSA_SIG_set0(DSA_SIG *sig, BIGNUM *r, BIGNUM *s)
diff --git a/crypto/dsa/dsa_locl.h b/crypto/dsa/dsa_locl.h
index d488951a16..5f9fc1ebf8 100644
--- a/crypto/dsa/dsa_locl.h
+++ b/crypto/dsa/dsa_locl.h
@@ -32,6 +32,11 @@ struct dsa_st {
CRYPTO_RWLOCK *lock;
};
+struct DSA_SIG_st {
+ BIGNUM *r;
+ BIGNUM *s;
+};
+
struct dsa_method {
char *name;
DSA_SIG *(*dsa_do_sign) (const unsigned char *dgst, int dlen, DSA *dsa);
diff --git a/crypto/dsa/dsa_ossl.c b/crypto/dsa/dsa_ossl.c
index 3c734ec26e..8913fcccd3 100644
--- a/crypto/dsa/dsa_ossl.c
+++ b/crypto/dsa/dsa_ossl.c
@@ -51,7 +51,6 @@ static DSA_SIG *dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
BIGNUM *kinv = NULL;
BIGNUM *m;
BIGNUM *xr;
- BIGNUM *r, *s;
BN_CTX *ctx = NULL;
int reason = ERR_R_BN_LIB;
DSA_SIG *ret = NULL;
@@ -71,13 +70,11 @@ static DSA_SIG *dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
if (ret == NULL)
goto err;
- DSA_SIG_get0(&r, &s, ret);
-
ctx = BN_CTX_new();
if (ctx == NULL)
goto err;
redo:
- if (!dsa_sign_setup(dsa, ctx, &kinv, &r, dgst, dlen))
+ if (!dsa_sign_setup(dsa, ctx, &kinv, &ret->r, dgst, dlen))
goto err;
if (dlen > BN_num_bytes(dsa->q))
@@ -91,21 +88,21 @@ static DSA_SIG *dsa_do_sign(const unsigned char *dgst, int dlen, DSA *dsa)
goto err;
/* Compute s = inv(k) (m + xr) mod q */
- if (!BN_mod_mul(xr, dsa->priv_key, r, dsa->q, ctx))
+ if (!BN_mod_mul(xr, dsa->priv_key, ret->r, dsa->q, ctx))
goto err; /* s = xr */
- if (!BN_add(s, xr, m))
+ if (!BN_add(ret->s, xr, m))
goto err; /* s = m + xr */
- if (BN_cmp(s, dsa->q) > 0)
- if (!BN_sub(s, s, dsa->q))
+ if (BN_cmp(ret->s, dsa->q) > 0)
+ if (!BN_sub(ret->s, ret->s, dsa->q))
goto err;
- if (!BN_mod_mul(s, s, kinv, dsa->q, ctx))
+ if (!BN_mod_mul(ret->s, ret->s, kinv, dsa->q, ctx))
goto err;
/*
* Redo if r or s is zero as required by FIPS 186-3: this is very
* unlikely.
*/
- if (BN_is_zero(r) || BN_is_zero(s))
+ if (BN_is_zero(ret->r) || BN_is_zero(ret->s))
goto redo;
rv = 1;
@@ -225,7 +222,7 @@ static int dsa_do_verify(const unsigned char *dgst, int dgst_len,
BN_CTX *ctx;
BIGNUM *u1, *u2, *t1;
BN_MONT_CTX *mont = NULL;
- BIGNUM *r, *s;
+ const BIGNUM *r, *s;
int ret = -1, i;
if (!dsa->p || !dsa->q || !dsa->g) {
DSAerr(DSA_F_DSA_DO_VERIFY, DSA_R_MISSING_PARAMETERS);
@@ -250,7 +247,7 @@ static int dsa_do_verify(const unsigned char *dgst, int dgst_len,
if (u1 == NULL || u2 == NULL || t1 == NULL || ctx == NULL)
goto err;
- DSA_SIG_get0(&r, &s, sig);
+ DSA_SIG_get0(sig, &r, &s);
if (BN_is_zero(r) || BN_is_negative(r) ||
BN_ucmp(r, dsa->q) >= 0) {
diff --git a/crypto/ec/ec_asn1.c b/crypto/ec/ec_asn1.c
index 9f7e837308..be7a96b74b 100644
--- a/crypto/ec/ec_asn1.c
+++ b/crypto/ec/ec_asn1.c
@@ -1172,7 +1172,7 @@ DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG)
DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG)
IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG)
-void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const ECDSA_SIG *sig)
+void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps)
{
if (pr != NULL)
*pr = sig->r;
diff --git a/doc/crypto/DSA_SIG_new.pod b/doc/crypto/DSA_SIG_new.pod
index 345c02c56d..f2696801a6 100644
--- a/doc/crypto/DSA_SIG_new.pod
+++ b/doc/crypto/DSA_SIG_new.pod
@@ -10,7 +10,7 @@ DSA_SIG_new, DSA_SIG_free - allocate and free DSA signature objects
DSA_SIG *DSA_SIG_new(void);
void DSA_SIG_free(DSA_SIG *a);
- void DSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const DSA_SIG *sig);
+ void DSA_SIG_get0(const DSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
int DSA_SIG_set0(DSA_SIG *sig, BIGNUM *r, BIGNUM *s);
=head1 DESCRIPTION
@@ -20,8 +20,8 @@ DSA_SIG_new() allocates and initializes a B<DSA_SIG> structure.
DSA_SIG_free() frees the B<DSA_SIG> structure and its components. The
values are erased before the memory is returned to the system.
-DSA_SIG_get0() returns internal pointers the B<r> and B<s> values contained
-in B<sig>. The values can then be examined or initialised.
+DSA_SIG_get0() returns internal pointers to the B<r> and B<s> values contained
+in B<sig>.
The B<r> and B<s> values can be set by calling DSA_SIG_set0() and passing the
new values for B<r> and B<s> as parameters to the function. Calling this
diff --git a/doc/crypto/ECDSA_SIG_new.pod b/doc/crypto/ECDSA_SIG_new.pod
index d3e181dbc4..e2015f100e 100644
--- a/doc/crypto/ECDSA_SIG_new.pod
+++ b/doc/crypto/ECDSA_SIG_new.pod
@@ -13,7 +13,7 @@ algorithm (ECDSA) functions
ECDSA_SIG *ECDSA_SIG_new(void);
void ECDSA_SIG_free(ECDSA_SIG *sig);
- void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const ECDSA_SIG *sig);
+ void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
int ECDSA_SIG_set0(ECDSA_SIG *sig, BIGNUM *r, BIGNUM *s);
int i2d_ECDSA_SIG(const ECDSA_SIG *sig, unsigned char **pp);
ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);
@@ -52,7 +52,7 @@ function also allocates the BIGNUMs) and initializes it.
ECDSA_SIG_free() frees the B<ECDSA_SIG> structure B<sig>.
ECDSA_SIG_get0() returns internal pointers the B<r> and B<s> values contained
-in B<sig>. The values can then be examined or initialised.
+in B<sig>.
The B<r> and B<s> values can be set by calling ECDSA_SIG_set0() and passing the
new values for B<r> and B<s> as parameters to the function. Calling this
diff --git a/include/openssl/dsa.h b/include/openssl/dsa.h
index 0c5196d08a..90f2eae7ce 100644
--- a/include/openssl/dsa.h
+++ b/include/openssl/dsa.h
@@ -81,7 +81,7 @@ DSA_SIG *DSA_SIG_new(void);
void DSA_SIG_free(DSA_SIG *a);
int i2d_DSA_SIG(const DSA_SIG *a, unsigned char **pp);
DSA_SIG *d2i_DSA_SIG(DSA_SIG **v, const unsigned char **pp, long length);
-void DSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const DSA_SIG *sig);
+void DSA_SIG_get0(const DSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
int DSA_SIG_set0(DSA_SIG *sig, BIGNUM *r, BIGNUM *s);
DSA_SIG *DSA_do_sign(const unsigned char *dgst, int dlen, DSA *dsa);
diff --git a/include/openssl/ec.h b/include/openssl/ec.h
index b5bd83d9a9..ef105b2415 100644
--- a/include/openssl/ec.h
+++ b/include/openssl/ec.h
@@ -1076,7 +1076,7 @@ ECDSA_SIG *d2i_ECDSA_SIG(ECDSA_SIG **sig, const unsigned char **pp, long len);
* \param pr pointer to BIGNUM pointer for r (may be NULL)
* \param ps pointer to BIGNUM pointer for s (may be NULL)
*/
-void ECDSA_SIG_get0(BIGNUM **pr, BIGNUM **ps, const ECDSA_SIG *sig);
+void ECDSA_SIG_get0(const ECDSA_SIG *sig, const BIGNUM **pr, const BIGNUM **ps);
/** Setter for r and s fields of ECDSA_SIG
* \param sig pointer to ECDSA_SIG pointer
diff --git a/test/ecdsatest.c b/test/ecdsatest.c
index 932ea3bff9..538f9dfe9d 100644
--- a/test/ecdsatest.c
+++ b/test/ecdsatest.c
@@ -145,7 +145,7 @@ int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
ECDSA_SIG *signature = NULL;
BIGNUM *r = NULL, *s = NULL;
BIGNUM *kinv = NULL, *rp = NULL;
- BIGNUM *sig_r, *sig_s;
+ const BIGNUM *sig_r, *sig_s;
if (md_ctx == NULL)
goto x962_int_err;
@@ -180,7 +180,7 @@ int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
goto x962_int_err;
if (!BN_dec2bn(&r, r_in) || !BN_dec2bn(&s, s_in))
goto x962_int_err;
- ECDSA_SIG_get0(&sig_r, &sig_s, signature);
+ ECDSA_SIG_get0(signature, &sig_r, &sig_s);
if (BN_cmp(sig_r, r) || BN_cmp(sig_s, s))
goto x962_int_err;
BIO_printf(out, ".");
@@ -251,13 +251,15 @@ int test_builtin(BIO *out)
size_t crv_len = 0, n = 0;
EC_KEY *eckey = NULL, *wrong_eckey = NULL;
EC_GROUP *group;
- ECDSA_SIG *ecdsa_sig = NULL;
+ ECDSA_SIG *ecdsa_sig = NULL, *modified_sig = NULL;
unsigned char digest[20], wrong_digest[20];
unsigned char *signature = NULL;
const unsigned char *sig_ptr;
unsigned char *sig_ptr2;
unsigned char *raw_buf = NULL;
- BIGNUM *sig_r, *sig_s;
+ const BIGNUM *sig_r, *sig_s;
+ BIGNUM *modified_r = NULL, *modified_s = NULL;
+ BIGNUM *unmodified_r = NULL, *unmodified_s = NULL;
unsigned int sig_len, degree, r_len, s_len, bn_len, buf_len;
int nid, ret = 0;
@@ -388,7 +390,7 @@ int test_builtin(BIO *out)
goto builtin_err;
}
- ECDSA_SIG_get0(&sig_r, &sig_s, ecdsa_sig);
+ ECDSA_SIG_get0(ecdsa_sig, &sig_r, &sig_s);
/* Store the two BIGNUMs in raw_buf. */
r_len = BN_num_bytes(sig_r);
@@ -409,12 +411,18 @@ int test_builtin(BIO *out)
dirt = raw_buf[11] ? raw_buf[11] : 1;
raw_buf[offset] ^= dirt;
/* Now read the BIGNUMs back in from raw_buf. */
- if ((BN_bin2bn(raw_buf, bn_len, sig_r) == NULL) ||
- (BN_bin2bn(raw_buf + bn_len, bn_len, sig_s) == NULL))
+ modified_sig = ECDSA_SIG_new();
+ if (modified_sig == NULL)
goto builtin_err;
-
+ if (((modified_r = BN_bin2bn(raw_buf, bn_len, NULL)) == NULL)
+ || ((modified_s = BN_bin2bn(raw_buf + bn_len, bn_len, NULL)) == NULL)
+ || !ECDSA_SIG_set0(modified_sig, modified_r, modified_s)) {
+ BN_free(modified_r);
+ BN_free(modified_s);
+ goto builtin_err;
+ }
sig_ptr2 = signature;
- sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2);
+ sig_len = i2d_ECDSA_SIG(modified_sig, &sig_ptr2);
if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1) {
BIO_printf(out, " failed\n");
goto builtin_err;
@@ -423,12 +431,16 @@ int test_builtin(BIO *out)
* Sanity check: undo the modification and verify signature.
*/
raw_buf[offset] ^= dirt;
- if ((BN_bin2bn(raw_buf, bn_len, sig_r) == NULL) ||
- (BN_bin2bn(raw_buf + bn_len, bn_len, sig_s) == NULL))
+ if (((unmodified_r = BN_bin2bn(raw_buf, bn_len, NULL)) == NULL)
+ || ((unmodified_s = BN_bin2bn(raw_buf + bn_len, bn_len, NULL)) == NULL)
+ || !ECDSA_SIG_set0(modified_sig, unmodified_r, unmodified_s)) {
+ BN_free(unmodified_r);
+ BN_free(unmodified_s);
goto builtin_err;
+ }
sig_ptr2 = signature;
- sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2);
+ sig_len = i2d_ECDSA_SIG(modified_sig, &sig_ptr2);
if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) {
BIO_printf(out, " failed\n");
goto builtin_err;
@@ -448,6 +460,8 @@ int test_builtin(BIO *out)
wrong_eckey = NULL;
ECDSA_SIG_free(ecdsa_sig);
ecdsa_sig = NULL;
+ ECDSA_SIG_free(modified_sig);
+ modified_sig = NULL;
OPENSSL_free(raw_buf);
raw_buf = NULL;
}
@@ -457,6 +471,7 @@ int test_builtin(BIO *out)
EC_KEY_free(eckey);
EC_KEY_free(wrong_eckey);
ECDSA_SIG_free(ecdsa_sig);
+ ECDSA_SIG_free(modified_sig);
OPENSSL_free(signature);
OPENSSL_free(raw_buf);
OPENSSL_free(curves);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-04 02:36:50 +0100