[openssl-commits] [openssl] OpenSSL_1_0_1-stable update

Matt Caswell matt at openssl.org
Wed Jun 10 10:01:28 UTC 2015


The branch OpenSSL_1_0_1-stable has been updated
       via  d163a2cc46709ba31e91887c65d32743913d3db3 (commit)
      from  72df35acf268e21adfe5b90b89f90e35e9db29bf (commit)


- Log -----------------------------------------------------------------
commit d163a2cc46709ba31e91887c65d32743913d3db3
Author: Matt Caswell <matt at openssl.org>
Date:   Thu Jun 4 14:22:00 2015 +0100

    EC_POINT_is_on_curve does not return a boolean
    
    The function EC_POINT_is_on_curve does not return a boolean value.
    It returns 1 if the point is on the curve, 0 if it is not, and -1
    on error. Many usages within OpenSSL were incorrectly using this
    function and therefore not correctly handling error conditions.
    
    With thanks to the Open Crypto Audit Project for reporting this issue.
    
    Reviewed-by: Kurt Roeckx <kurt at openssl.org>
    (cherry picked from commit 68886be7e2cd395a759fcd41d2cede461b68843d)

-----------------------------------------------------------------------

Summary of changes:
 crypto/ec/ec2_oct.c  |  2 +-
 crypto/ec/ec_check.c |  2 +-
 crypto/ec/ec_key.c   |  2 +-
 crypto/ec/ec_lib.c   |  7 +++++++
 crypto/ec/ecp_oct.c  |  2 +-
 crypto/ec/ectest.c   | 24 ++++++++++++------------
 6 files changed, 23 insertions(+), 16 deletions(-)

diff --git a/crypto/ec/ec2_oct.c b/crypto/ec/ec2_oct.c
index c245d88..0d04cc6 100644
--- a/crypto/ec/ec2_oct.c
+++ b/crypto/ec/ec2_oct.c
@@ -387,7 +387,7 @@ int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
     }
 
     /* test required by X9.62 */
-    if (!EC_POINT_is_on_curve(group, point, ctx)) {
+    if (EC_POINT_is_on_curve(group, point, ctx) <= 0) {
         ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_POINT_IS_NOT_ON_CURVE);
         goto err;
     }
diff --git a/crypto/ec/ec_check.c b/crypto/ec/ec_check.c
index d3f5349..dd6f0ac 100644
--- a/crypto/ec/ec_check.c
+++ b/crypto/ec/ec_check.c
@@ -85,7 +85,7 @@ int EC_GROUP_check(const EC_GROUP *group, BN_CTX *ctx)
         ECerr(EC_F_EC_GROUP_CHECK, EC_R_UNDEFINED_GENERATOR);
         goto err;
     }
-    if (!EC_POINT_is_on_curve(group, group->generator, ctx)) {
+    if (EC_POINT_is_on_curve(group, group->generator, ctx) <= 0) {
         ECerr(EC_F_EC_GROUP_CHECK, EC_R_POINT_IS_NOT_ON_CURVE);
         goto err;
     }
diff --git a/crypto/ec/ec_key.c b/crypto/ec/ec_key.c
index ebdffc8..55ce3fe 100644
--- a/crypto/ec/ec_key.c
+++ b/crypto/ec/ec_key.c
@@ -314,7 +314,7 @@ int EC_KEY_check_key(const EC_KEY *eckey)
         goto err;
 
     /* testing whether the pub_key is on the elliptic curve */
-    if (!EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx)) {
+    if (EC_POINT_is_on_curve(eckey->group, eckey->pub_key, ctx) <= 0) {
         ECerr(EC_F_EC_KEY_CHECK_KEY, EC_R_POINT_IS_NOT_ON_CURVE);
         goto err;
     }
diff --git a/crypto/ec/ec_lib.c b/crypto/ec/ec_lib.c
index 9a54f41..e227520 100644
--- a/crypto/ec/ec_lib.c
+++ b/crypto/ec/ec_lib.c
@@ -934,6 +934,13 @@ int EC_POINT_is_at_infinity(const EC_GROUP *group, const EC_POINT *point)
     return group->meth->is_at_infinity(group, point);
 }
 
+/*
+ * Check whether an EC_POINT is on the curve or not. Note that the return
+ * value for this function should NOT be treated as a boolean. Return values:
+ *  1: The point is on the curve
+ *  0: The point is not on the curve
+ * -1: An error occurred
+ */
 int EC_POINT_is_on_curve(const EC_GROUP *group, const EC_POINT *point,
                          BN_CTX *ctx)
 {
diff --git a/crypto/ec/ecp_oct.c b/crypto/ec/ecp_oct.c
index e5cec8b..1bc3f39 100644
--- a/crypto/ec/ecp_oct.c
+++ b/crypto/ec/ecp_oct.c
@@ -413,7 +413,7 @@ int ec_GFp_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
     }
 
     /* test required by X9.62 */
-    if (!EC_POINT_is_on_curve(group, point, ctx)) {
+    if (EC_POINT_is_on_curve(group, point, ctx) <= 0) {
         ECerr(EC_F_EC_GFP_SIMPLE_OCT2POINT, EC_R_POINT_IS_NOT_ON_CURVE);
         goto err;
     }
diff --git a/crypto/ec/ectest.c b/crypto/ec/ectest.c
index a18b327..fede530 100644
--- a/crypto/ec/ectest.c
+++ b/crypto/ec/ectest.c
@@ -412,7 +412,7 @@ static void prime_field_tests(void)
         ABORT;
     if (!EC_POINT_set_compressed_coordinates_GFp(group, Q, x, 1, ctx))
         ABORT;
-    if (!EC_POINT_is_on_curve(group, Q, ctx)) {
+    if (EC_POINT_is_on_curve(group, Q, ctx) <= 0) {
         if (!EC_POINT_get_affine_coordinates_GFp(group, Q, x, y, ctx))
             ABORT;
         fprintf(stderr, "Point is not on curve: x = 0x");
@@ -544,7 +544,7 @@ static void prime_field_tests(void)
         ABORT;
     if (!EC_POINT_set_affine_coordinates_GFp(group, P, x, y, ctx))
         ABORT;
-    if (!EC_POINT_is_on_curve(group, P, ctx))
+    if (EC_POINT_is_on_curve(group, P, ctx) <= 0)
         ABORT;
     if (!BN_hex2bn(&z, "0100000000000000000001F4C8F927AED3CA752257"))
         ABORT;
@@ -593,7 +593,7 @@ static void prime_field_tests(void)
         ABORT;
     if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 1, ctx))
         ABORT;
-    if (!EC_POINT_is_on_curve(group, P, ctx))
+    if (EC_POINT_is_on_curve(group, P, ctx) <= 0)
         ABORT;
     if (!BN_hex2bn(&z, "FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831"))
         ABORT;
@@ -646,7 +646,7 @@ static void prime_field_tests(void)
         ABORT;
     if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 0, ctx))
         ABORT;
-    if (!EC_POINT_is_on_curve(group, P, ctx))
+    if (EC_POINT_is_on_curve(group, P, ctx) <= 0)
         ABORT;
     if (!BN_hex2bn
         (&z, "FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D"))
@@ -705,7 +705,7 @@ static void prime_field_tests(void)
         ABORT;
     if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 1, ctx))
         ABORT;
-    if (!EC_POINT_is_on_curve(group, P, ctx))
+    if (EC_POINT_is_on_curve(group, P, ctx) <= 0)
         ABORT;
     if (!BN_hex2bn(&z, "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E"
                    "84F3B9CAC2FC632551"))
@@ -761,7 +761,7 @@ static void prime_field_tests(void)
         ABORT;
     if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 1, ctx))
         ABORT;
-    if (!EC_POINT_is_on_curve(group, P, ctx))
+    if (EC_POINT_is_on_curve(group, P, ctx) <= 0)
         ABORT;
     if (!BN_hex2bn(&z, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
                    "FFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973"))
@@ -820,7 +820,7 @@ static void prime_field_tests(void)
         ABORT;
     if (!EC_POINT_set_compressed_coordinates_GFp(group, P, x, 0, ctx))
         ABORT;
-    if (!EC_POINT_is_on_curve(group, P, ctx))
+    if (EC_POINT_is_on_curve(group, P, ctx) <= 0)
         ABORT;
     if (!BN_hex2bn(&z, "1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF"
                    "FFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5"
@@ -864,7 +864,7 @@ static void prime_field_tests(void)
         ABORT;
     if (!EC_POINT_dbl(group, P, P, ctx))
         ABORT;
-    if (!EC_POINT_is_on_curve(group, P, ctx))
+    if (EC_POINT_is_on_curve(group, P, ctx) <= 0)
         ABORT;
     if (!EC_POINT_invert(group, Q, ctx))
         ABORT;                  /* P = -2Q */
@@ -1008,7 +1008,7 @@ static void prime_field_tests(void)
 #  define CHAR2_CURVE_TEST_INTERNAL(_name, _p, _a, _b, _x, _y, _y_bit, _order, _cof, _degree, _variable) \
         if (!BN_hex2bn(&x, _x)) ABORT; \
         if (!EC_POINT_set_compressed_coordinates_GF2m(group, P, x, _y_bit, ctx)) ABORT; \
-        if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT; \
+        if (EC_POINT_is_on_curve(group, P, ctx) <= 0) ABORT; \
         if (!BN_hex2bn(&z, _order)) ABORT; \
         if (!BN_hex2bn(&cof, _cof)) ABORT; \
         if (!EC_GROUP_set_generator(group, P, z, cof)) ABORT; \
@@ -1026,7 +1026,7 @@ static void prime_field_tests(void)
         if (!BN_hex2bn(&x, _x)) ABORT; \
         if (!BN_hex2bn(&y, _y)) ABORT; \
         if (!EC_POINT_set_affine_coordinates_GF2m(group, P, x, y, ctx)) ABORT; \
-        if (!EC_POINT_is_on_curve(group, P, ctx)) ABORT; \
+        if (EC_POINT_is_on_curve(group, P, ctx) <= 0) ABORT; \
         if (!BN_hex2bn(&z, _order)) ABORT; \
         if (!BN_hex2bn(&cof, _cof)) ABORT; \
         if (!EC_GROUP_set_generator(group, P, z, cof)) ABORT; \
@@ -1157,7 +1157,7 @@ static void char2_field_tests(void)
     if (!EC_POINT_set_affine_coordinates_GF2m(group, Q, x, y, ctx))
         ABORT;
 #  endif
-    if (!EC_POINT_is_on_curve(group, Q, ctx)) {
+    if (EC_POINT_is_on_curve(group, Q, ctx) <= 0) {
 /* Change test based on whether binary point compression is enabled or not. */
 #  ifdef OPENSSL_EC_BIN_PT_COMP
         if (!EC_POINT_get_affine_coordinates_GF2m(group, Q, x, y, ctx))
@@ -1378,7 +1378,7 @@ static void char2_field_tests(void)
         ABORT;
     if (!EC_POINT_dbl(group, P, P, ctx))
         ABORT;
-    if (!EC_POINT_is_on_curve(group, P, ctx))
+    if (EC_POINT_is_on_curve(group, P, ctx) <= 0)
         ABORT;
     if (!EC_POINT_invert(group, Q, ctx))
         ABORT;                  /* P = -2Q */


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