diff -up openssl-3.0.1/crypto/ec/ec_asn1.c.disable_explicit_ec openssl-3.0.1/crypto/ec/ec_asn1.c

--- openssl-3.0.1/crypto/ec/ec_asn1.c.disable_explicit_ec	2022-03-22 13:10:45.718077845 +0100

+++ openssl-3.0.1/crypto/ec/ec_asn1.c	2022-03-22 13:12:46.626599016 +0100

@@ -895,6 +895,12 @@ EC_GROUP *d2i_ECPKParameters(EC_GROUP **

     if (params->type == ECPKPARAMETERS_TYPE_EXPLICIT)

         group->decoded_from_explicit_params = 1;

+    if (EC_GROUP_check_named_curve(group, 0, NULL) == NID_undef) {

+        EC_GROUP_free(group);

+        ECPKPARAMETERS_free(params);

+        return NULL;

+    }

+

     if (a) {

         EC_GROUP_free(*a);

         *a = group;

@@ -954,6 +959,11 @@ EC_KEY *d2i_ECPrivateKey(EC_KEY **a, con

         goto err;

     }

+    if (EC_GROUP_check_named_curve(ret->group, 0, NULL) == NID_undef) {

+        ERR_raise(ERR_LIB_EC, EC_R_UNKNOWN_GROUP);

+        goto err;

+    }

+

     ret->version = priv_key->version;

     if (priv_key->privateKey) {

diff -up openssl-3.0.1/test/endecode_test.c.disable_explicit_ec openssl-3.0.1/test/endecode_test.c

--- openssl-3.0.1/test/endecode_test.c.disable_explicit_ec	2022-03-21 16:55:46.005558779 +0100

+++ openssl-3.0.1/test/endecode_test.c	2022-03-21 16:56:12.636792762 +0100

@@ -57,7 +57,7 @@ static BN_CTX *bnctx = NULL;

 static OSSL_PARAM_BLD *bld_prime_nc = NULL;

 static OSSL_PARAM_BLD *bld_prime = NULL;

 static OSSL_PARAM *ec_explicit_prime_params_nc = NULL;

-static OSSL_PARAM *ec_explicit_prime_params_explicit = NULL;

+/*static OSSL_PARAM *ec_explicit_prime_params_explicit = NULL;*/

 # ifndef OPENSSL_NO_EC2M

 static OSSL_PARAM_BLD *bld_tri_nc = NULL;

@@ -990,9 +990,9 @@ IMPLEMENT_TEST_SUITE_LEGACY(EC, "EC")

 DOMAIN_KEYS(ECExplicitPrimeNamedCurve);

 IMPLEMENT_TEST_SUITE(ECExplicitPrimeNamedCurve, "EC")

 IMPLEMENT_TEST_SUITE_LEGACY(ECExplicitPrimeNamedCurve, "EC")

-DOMAIN_KEYS(ECExplicitPrime2G);

-IMPLEMENT_TEST_SUITE(ECExplicitPrime2G, "EC")

-IMPLEMENT_TEST_SUITE_LEGACY(ECExplicitPrime2G, "EC")

+/*DOMAIN_KEYS(ECExplicitPrime2G);*/

+/*IMPLEMENT_TEST_SUITE(ECExplicitPrime2G, "EC")*/

+/*IMPLEMENT_TEST_SUITE_LEGACY(ECExplicitPrime2G, "EC")*/

 # ifndef OPENSSL_NO_EC2M

 DOMAIN_KEYS(ECExplicitTriNamedCurve);

 IMPLEMENT_TEST_SUITE(ECExplicitTriNamedCurve, "EC")

@@ -1318,7 +1318,7 @@ int setup_tests(void)

         || !create_ec_explicit_prime_params_namedcurve(bld_prime_nc)

         || !create_ec_explicit_prime_params(bld_prime)

         || !TEST_ptr(ec_explicit_prime_params_nc = OSSL_PARAM_BLD_to_param(bld_prime_nc))

-        || !TEST_ptr(ec_explicit_prime_params_explicit = OSSL_PARAM_BLD_to_param(bld_prime))

+/*        || !TEST_ptr(ec_explicit_prime_params_explicit = OSSL_PARAM_BLD_to_param(bld_prime))*/

 # ifndef OPENSSL_NO_EC2M

         || !TEST_ptr(bld_tri_nc = OSSL_PARAM_BLD_new())

         || !TEST_ptr(bld_tri = OSSL_PARAM_BLD_new())

@@ -1346,7 +1346,7 @@ int setup_tests(void)

     TEST_info("Generating EC keys...");

     MAKE_DOMAIN_KEYS(EC, "EC", EC_params);

     MAKE_DOMAIN_KEYS(ECExplicitPrimeNamedCurve, "EC", ec_explicit_prime_params_nc);

-    MAKE_DOMAIN_KEYS(ECExplicitPrime2G, "EC", ec_explicit_prime_params_explicit);

+/*    MAKE_DOMAIN_KEYS(ECExplicitPrime2G, "EC", ec_explicit_prime_params_explicit);*/

 # ifndef OPENSSL_NO_EC2M

     MAKE_DOMAIN_KEYS(ECExplicitTriNamedCurve, "EC", ec_explicit_tri_params_nc);

     MAKE_DOMAIN_KEYS(ECExplicitTri2G, "EC", ec_explicit_tri_params_explicit);

@@ -1389,8 +1389,8 @@ int setup_tests(void)

         ADD_TEST_SUITE_LEGACY(EC);

         ADD_TEST_SUITE(ECExplicitPrimeNamedCurve);

         ADD_TEST_SUITE_LEGACY(ECExplicitPrimeNamedCurve);

-        ADD_TEST_SUITE(ECExplicitPrime2G);

-        ADD_TEST_SUITE_LEGACY(ECExplicitPrime2G);

+/*        ADD_TEST_SUITE(ECExplicitPrime2G);*/

+/*        ADD_TEST_SUITE_LEGACY(ECExplicitPrime2G);*/

 # ifndef OPENSSL_NO_EC2M

         ADD_TEST_SUITE(ECExplicitTriNamedCurve);

         ADD_TEST_SUITE_LEGACY(ECExplicitTriNamedCurve);

@@ -1427,7 +1427,7 @@ void cleanup_tests(void)

 {

 #ifndef OPENSSL_NO_EC

     OSSL_PARAM_free(ec_explicit_prime_params_nc);

-    OSSL_PARAM_free(ec_explicit_prime_params_explicit);

+/*    OSSL_PARAM_free(ec_explicit_prime_params_explicit);*/

     OSSL_PARAM_BLD_free(bld_prime_nc);

     OSSL_PARAM_BLD_free(bld_prime);

 # ifndef OPENSSL_NO_EC2M

@@ -1449,7 +1449,7 @@ void cleanup_tests(void)

 #ifndef OPENSSL_NO_EC

     FREE_DOMAIN_KEYS(EC);

     FREE_DOMAIN_KEYS(ECExplicitPrimeNamedCurve);

-    FREE_DOMAIN_KEYS(ECExplicitPrime2G);

+/*    FREE_DOMAIN_KEYS(ECExplicitPrime2G);*/

 # ifndef OPENSSL_NO_EC2M

     FREE_DOMAIN_KEYS(ECExplicitTriNamedCurve);

     FREE_DOMAIN_KEYS(ECExplicitTri2G);

diff -up openssl-3.0.1/test/recipes/30-test_evp_data/evppkey_ecdsa.txt.disable_explicit_ec openssl-3.0.1/test/recipes/30-test_evp_data/evppkey_ecdsa.txt

--- openssl-3.0.1/test/recipes/30-test_evp_data/evppkey_ecdsa.txt.disable_explicit_ec	2022-03-25 11:20:50.920949208 +0100

+++ openssl-3.0.1/test/recipes/30-test_evp_data/evppkey_ecdsa.txt	2022-03-25 11:21:13.177147598 +0100

@@ -121,18 +121,6 @@ AAAA//////////+85vqtpxeehPO5ysL8YyVRAgEB

 3ev1gTwRBduzqqlwd54AUSgI+pjttW8zrWNitO8H1sf59MPWOESKxNtZ1+Nl

 -----END PRIVATE KEY-----

-PrivateKey = EC_EXPLICIT

------BEGIN PRIVATE KEY-----

-MIIBeQIBADCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAAB

-AAAAAAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA

-///////////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMV

-AMSdNgiG5wSTamZ44ROdJreBn36QBEEE5JcIvn36opqjEm/k59Al40rBAxWM2TPG

-l0L13Je51zHpfXQ9Z2o7IQicMXP4wSfJ0qCgg2bgydqoxlYrlLGuVQIhAP////8A

-AAAA//////////+85vqtpxeehPO5ysL8YyVRAgEBBG0wawIBAQQgec92jwduadCk

-OjoNRI+YT5Be5TkzZXzYCyTLkMOikDmhRANCAATtECEhQbLEaiUj/Wu0qjcr81lL

-46dx5zYgArz/iaSNJ3W80oO+F7v04jlQ7wxQzg96R0bwKiMeq5CcW9ZFt6xg

------END PRIVATE KEY-----

-

 PrivateKey = B-163

 -----BEGIN PRIVATE KEY-----

 MGMCAQAwEAYHKoZIzj0CAQYFK4EEAA8ETDBKAgEBBBUDnQW0mLiHVha/jqFznX/K