linux-kernel - Re: [PATCH] selftests/sgx: Fix OpenSSL deprecated warning for ERR_get_error

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Message-ID: <a226891f-e589-04ea-f595-fed3d1f75691@gmail.com>
Date:   Wed, 31 Aug 2022 06:33:26 +0000
From:   Dhanuka <wdnuka@...il.com>
To:     Jarkko Sakkinen <jarkko@...nel.org>
Cc:     dave.hansen@...ux.intel.com, shuah@...nel.org,
        linux-sgx@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] selftests/sgx: Fix OpenSSL deprecated warning for
 ERR_get_error_line

On 8/31/22 01:06, Jarkko Sakkinen wrote:
> On Tue, Aug 30, 2022 at 11:18:03AM +0000, Dhanuka wrote:
>> On 8/30/22 02:52, Jarkko Sakkinen wrote:
>>> On Mon, Aug 29, 2022 at 03:15:30PM +0300, Jarkko Sakkinen wrote:
>>>> On Sun, Aug 28, 2022 at 11:48:59AM +0530, Dhanuka Warusadura wrote:
>>>>> These changes fix the "error: ‘ERR_get_error_line’ is deprecated:
>>>>> Since OpenSSL 3.0" warning.
>>>>>
>>>>> Signed-off-by: Dhanuka Warusadura <wdnuka@...il.com>
>>>>> ---
>>>>>    tools/testing/selftests/sgx/sigstruct.c | 2 +-
>>>>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>>>>
>>>>> diff --git a/tools/testing/selftests/sgx/sigstruct.c b/tools/testing/selftests/sgx/sigstruct.c
>>>>> index 50c5ab1aa6fa..671d9b58e274 100644
>>>>> --- a/tools/testing/selftests/sgx/sigstruct.c
>>>>> +++ b/tools/testing/selftests/sgx/sigstruct.c
>>>>> @@ -136,7 +136,7 @@ static bool check_crypto_errors(void)
>>>>>    			break;
>>>>>    		had_errors = true;
>>>>> -		err = ERR_get_error_line(&filename, &line);
>>>>> +		err = ERR_peek_last_error_line(&filename, &line);
>>>>>    		ERR_error_string_n(err, str, sizeof(str));
>>>>>    		fprintf(stderr, "crypto: %s: %s:%d\n", str, filename, line);
>>>>>    	}
>>>>> -- 
>>>>> 2.37.2
>>>>>
>>>> Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org>
>>> Actually NAK.
>>>
>>> This fix is not complete:
>>>
>>> sigstruct.c: In function ‘get_modulus’:
>>> sigstruct.c:151:9: error: ‘RSA_get0_key’ is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
>>>     151 |         RSA_get0_key(key, &n, NULL, NULL);
>>>         |         ^~~~~~~~~~~~
>>> In file included from /usr/include/openssl/x509.h:36,
>>>                    from /usr/include/openssl/pem.h:23,
>>>                    from sigstruct.c:16:
>>> /usr/include/openssl/rsa.h:217:28: note: declared here
>>>     217 | OSSL_DEPRECATEDIN_3_0 void RSA_get0_key(const RSA *r,
>>>         |                            ^~~~~~~~~~~~
>>> sigstruct.c: In function ‘gen_sign_key’:
>>> sigstruct.c:168:9: error: ‘PEM_read_bio_RSAPrivateKey’ is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declaration
>>> ]
>>>     168 |         key = PEM_read_bio_RSAPrivateKey(bio, NULL, NULL, NULL);
>>>         |         ^~~
>>> /usr/include/openssl/pem.h:447:1: note: declared here
>>>     447 | DECLARE_PEM_rw_cb_attr(OSSL_DEPRECATEDIN_3_0, RSAPrivateKey, RSA)
>>>         | ^~~~~~~~~~~~~~~~~~~~~~
>>> sigstruct.c: In function ‘encl_measure’:
>>> sigstruct.c:364:9: error: ‘RSA_sign’ is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
>>>     364 |         if (!RSA_sign(NID_sha256, digest, SHA256_DIGEST_LENGTH,
>>>         |         ^~
>>> /usr/include/openssl/rsa.h:348:27: note: declared here
>>>     348 | OSSL_DEPRECATEDIN_3_0 int RSA_sign(int type, const unsigned char *m,
>>>         |                           ^~~~~~~~
>>> sigstruct.c:377:9: error: ‘RSA_free’ is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
>>>     377 |         RSA_free(key);
>>>         |         ^~~~~~~~
>>> /usr/include/openssl/rsa.h:293:28: note: declared here
>>>     293 | OSSL_DEPRECATEDIN_3_0 void RSA_free(RSA *r);
>>>         |                            ^~~~~~~~
>>> sigstruct.c:382:9: error: ‘RSA_free’ is deprecated: Since OpenSSL 3.0 [-Werror=deprecated-declarations]
>>>     382 |         RSA_free(key);
>>>         |         ^~~~~~~~
>>> /usr/include/openssl/rsa.h:293:28: note: declared here
>>>     293 | OSSL_DEPRECATEDIN_3_0 void RSA_free(RSA *r);
>>>         |                            ^~~~~~~~
>>> cc1: all warnings being treated as errors
>>> make: *** [Makefile:39: /home/jarkko/work/linux-sgx/tools/testing/selftests/sgx/sigstruct.o] Error 1
>>>
>>> BR, Jarkko
>> Thanks for the review.
>>
>> But, my intention was to just fix the `ERR_get_error_line` deprecated
>> warning (as mentioned in the commit header) and not all the OpenSSL
>> deprecated warnings found in `sigstruct.c`
>>
>> Do I need to fix all these OpenSSL deprecated warnings in `sigstruct.c` in
>> order to get this patch merged?
> Yes, it is incomplete as it is.
>
> BR, Jarkko

Understood. Will try to resolve the remaining deprecated warnings as well.

Thanks,
Dhanuka