[ruby/openssl] require OpenSSL >= 1.0.2 and LibreSSL >= 3.1

Clean up old version guards in preparation for the upcoming OpenSSL 3.0
support.

OpenSSL 1.0.1 reached its EOL on 2016-12-31. At that time, we decided
to keep 1.0.1 support because many major Linux distributions were still
shipped with 1.0.1. Now, nearly 4 years later, most Linux distributions
are reaching their EOL and it should be safe to assume nobody uses them
anymore. Major ones that were using 1.0.1:

 - Ubuntu 14.04 is EOL since 2019-04-30
 - RHEL 6 will reach EOL on 2020-11-30

LibreSSL 3.0 and older versions are no longer supported by the LibreSSL
team as of October 2020.

Note that OpenSSL 1.0.2 also reached EOL on 2019-12-31 and 1.1.0 also
did on 2018-08-31.

https://github.com/ruby/openssl/commit/c055938f4b

1 files changed, 0 insertions, 48 deletions

diff --git a/ext/openssl/ossl_ocsp.c b/ext/openssl/ossl_ocsp.c
index 0ade7adde7..c9b02a1752 100644
--- a/ext/openssl/ossl_ocsp.c
+++ b/ext/openssl/ossl_ocsp.c
@@ -1069,55 +1069,7 @@ ossl_ocspbres_verify(int argc, VALUE *argv, VALUE self)
     x509st = GetX509StorePtr(store);
     flg = NIL_P(flags) ? 0 : NUM2INT(flags);
     x509s = ossl_x509_ary2sk(certs);
-#if (OPENSSL_VERSION_NUMBER < 0x1000202fL) || defined(LIBRESSL_VERSION_NUMBER)
-    /*
-     * OpenSSL had a bug that it doesn't use the certificates in x509s for
-     * verifying the chain. This can be a problem when the response is signed by
-     * a certificate issued by an intermediate CA.
-     *
-     *       root_ca
-     *         |
-     *   intermediate_ca
-     *         |-------------|
-     *     end_entity    ocsp_signer
-     *
-     * When the certificate hierarchy is like this, and the response contains
-     * only ocsp_signer certificate, the following code wrongly fails.
-     *
-     *   store = OpenSSL::X509::Store.new; store.add_cert(root_ca)
-     *   basic_response.verify([intermediate_ca], store)
-     *
-     * So add the certificates in x509s to the embedded certificates list first.
-     *
-     * This is fixed in OpenSSL 0.9.8zg, 1.0.0s, 1.0.1n, 1.0.2b. But it still
-     * exists in LibreSSL 2.1.10, 2.2.9, 2.3.6, 2.4.1.
-     */
-    if (!(flg & (OCSP_NOCHAIN | OCSP_NOVERIFY)) &&
-	sk_X509_num(x509s) && sk_X509_num(bs->certs)) {
-	int i;
-
-	bs = ASN1_item_dup(ASN1_ITEM_rptr(OCSP_BASICRESP), bs);
-	if (!bs) {
-	    sk_X509_pop_free(x509s, X509_free);
-	    ossl_raise(eOCSPError, "ASN1_item_dup");
-	}
-
-	for (i = 0; i < sk_X509_num(x509s); i++) {
-	    if (!OCSP_basic_add1_cert(bs, sk_X509_value(x509s, i))) {
-		sk_X509_pop_free(x509s, X509_free);
-		OCSP_BASICRESP_free(bs);
-		ossl_raise(eOCSPError, "OCSP_basic_add1_cert");
-	    }
-	}
-	result = OCSP_basic_verify(bs, x509s, x509st, flg);
-	OCSP_BASICRESP_free(bs);
-    }
-    else {
-	result = OCSP_basic_verify(bs, x509s, x509st, flg);
-    }
-#else
     result = OCSP_basic_verify(bs, x509s, x509st, flg);
-#endif
     sk_X509_pop_free(x509s, X509_free);
     if (result <= 0)
 	ossl_clear_error();