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[ruby/openssl] pkey/ec: check private key validity with OpenSSL 3

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The behavior of EVP_PKEY_public_check changed between OpenSSL 1.1.1
and 3.0 so that it no longer validates the private key. Instead, private
keys can be validated through EVP_PKEY_private_check and
EVP_PKEY_pairwise_check.

[ky: simplified condition to use either EVP_PKEY_check() or
EVP_PKEY_public_check().]

https://github.com/ruby/openssl/commit/e38a63ab3d
This commit is contained in:
Joe Truba 2022-11-20 00:54:32 +00:00 committed by Kazuki Yamaguchi
parent 782777a803
commit 0e11d2c3f8
4 changed files with 35 additions and 5 deletions
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22
ext/openssl/ossl_pkey_ec.c
View File

@ -483,16 +483,28 @@ static VALUE ossl_ec_key_check_key(VALUE self)
#ifdef HAVE_EVP_PKEY_CHECK
EVP_PKEY *pkey;
EVP_PKEY_CTX *pctx;
int ret;
EC_KEY *ec;
GetPKey(self, pkey);
GetEC(self, ec);
pctx = EVP_PKEY_CTX_new(pkey, /* engine */NULL);
if (!pctx)
ossl_raise(eDHError, "EVP_PKEY_CTX_new");
ret = EVP_PKEY_public_check(pctx);
ossl_raise(eECError, "EVP_PKEY_CTX_new");
if (EC_KEY_get0_private_key(ec) != NULL) {
if (EVP_PKEY_check(pctx) != 1) {
EVP_PKEY_CTX_free(pctx);
ossl_raise(eECError, "EVP_PKEY_check");
}
}
else {
if (EVP_PKEY_public_check(pctx) != 1) {
EVP_PKEY_CTX_free(pctx);
ossl_raise(eECError, "EVP_PKEY_public_check");
}
}
EVP_PKEY_CTX_free(pctx);
if (ret != 1)
ossl_raise(eECError, "EVP_PKEY_public_check");
#else
EC_KEY *ec;

5
test/openssl/fixtures/pkey/p256_too_large.pem Normal file
View File

@ -0,0 +1,5 @@
-----BEGIN EC PRIVATE KEY-----
MHcCAQEEIP+TT0V8Fndsnacji9tyf6hmhHywcOWTee9XkiBeJoVloAoGCCqGSM49
AwEHoUQDQgAEBkhhJIU/2/YdPSlY2I1k25xjK4trr5OXSgXvBC21PtY0HQ7lor7A
jzT0giJITqmcd81fwGw5+96zLcdxTF1hVQ==
-----END EC PRIVATE KEY-----

6
test/openssl/fixtures/pkey/p384_invalid.pem Normal file
View File

@ -0,0 +1,6 @@
-----BEGIN EC PRIVATE KEY-----
MIGkAgEBBDDA1Tm0m7YhkfeVpFuarAJYVlHp2tQj+1fOBiLa10t9E8TiQO/hVfxB
vGaVEQwOheWgBwYFK4EEACKhZANiAASyGqmryZGqdpsq5gEDIfNvgC3AwSJxiBCL
XKHBTFRp+tCezLDOK/6V8KK/vVGBJlGFW6/I7ahyXprxS7xs7hPA9iz5YiuqXlu+
lbrIpZOz7b73hyQQCkvbBO/Avg+hPAk=
-----END EC PRIVATE KEY-----

7
test/openssl/test_pkey_ec.rb
View File

@ -90,6 +90,13 @@ class OpenSSL::TestEC < OpenSSL::PKeyTestCase
assert_equal(true, key2.public?)
assert_equal(true, key2.check_key)
# Behavior of EVP_PKEY_public_check changes between OpenSSL 1.1.1 and 3.0
key4 = Fixtures.pkey("p256_too_large")
assert_raise(OpenSSL::PKey::ECError) { key4.check_key }
key5 = Fixtures.pkey("p384_invalid")
assert_raise(OpenSSL::PKey::ECError) { key5.check_key }
# EC#private_key= is deprecated in 3.0 and won't work on OpenSSL 3.0
if !openssl?(3, 0, 0)
key2.private_key += 1