[vbox-dev] Problem building VBox for Windows with gSOAP 2.8.45
Konstantin Vlasov
flint at flint-inc.ru
Fri May 12 13:44:53 GMT 2017
Hi,
I met a strange problem building VirtualBox for Windows. Details are given
below, but what generally happens is:
There is some function in OpenSSL that is used by gSOAP; let's call it
function A(). The definition is simple:
int A() {
return B();
}
But if I edit gSOAP and replace the call to A() with B(), suddently
vboxwebsrv.exe stops building and returns multiple linker errors about symbol
conflicts between OpenSSL and VBoxRT.lib, and several unresolved externals.
How could that be?
=================================================
Now, all the gore details.
I'm trying to build Windows version of VirtualBox 5.1.22 with latest libraries,
particularly:
* curl 7.54.0
* OpenSSL 1.1.0e
* gSOAP 2.8.45
With gSOAP 2.8.44 it compiled without problems, but with 2.8.45 linker errors
occur when trying to link vboxwebsrv.exe. I compared gSOAP source code for those
versions and narrowed it down to specific change that causes the problem:
gsoap_2.8.44.zip\gsoap-2.8\gsoap\stdsoap2.cpp:3575 soap_ssl_crl()
X509_VERIFY_PARAM *param = X509_VERIFY_PARAM_new();
X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK);
X509_STORE_set1_param(store, param);
X509_VERIFY_PARAM_free(param);
gsoap_2.8.45.zip\gsoap-2.8\gsoap\stdsoap2.cpp:3578 soap_ssl_crl()
X509_STORE_set_flags(store, X509_V_FLAG_CRL_CHECK | X509_V_FLAG_CRL_CHECK_ALL);
(Four lines were replaced with one.)
Actually, there are several files that are identical to this stdsoap2.cpp:
* stdsoap2.c
* samples\calc_vs2005\calc_vs2005\stdsoap2.cpp
* VisualStudio2005\wsdl2h\wsdl2h\stdsoap2.cpp
I didn't investigate which ones are used, so when I'm talking about just
stdsoap2.cpp I mean all of them: copying, editing, etc., so that they always
remain identical to each other.
Now, if I use 2.8.45 and try to build vboxwebsrv.exe I get the following output:
libcrypto.lib(x509_lu.obj) : error LNK2005: X509_STORE_add_lookup already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(stack.obj) : error LNK2005: OPENSSL_sk_num already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(stack.obj) : error LNK2005: OPENSSL_sk_value already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(stack.obj) : error LNK2005: OPENSSL_sk_pop_free already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(mem.obj) : error LNK2005: CRYPTO_free already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(x509_cmp.obj) : error LNK2005: X509_get_subject_name already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(err.obj) : error LNK2005: ERR_clear_error already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(err.obj) : error LNK2005: ERR_error_string_n already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(err.obj) : error LNK2005: ERR_error_string already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(err.obj) : error LNK2005: ERR_get_error already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(err.obj) : error LNK2005: ERR_peek_error already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(x509_vfy.obj) : error LNK2005: X509_STORE_CTX_get_error already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(x509_vfy.obj) : error LNK2005: X509_STORE_CTX_set_error already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(x_x509.obj) : error LNK2005: X509_free already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(v3_utl.obj) : error LNK2005: X509V3_conf_free already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(x509_ext.obj) : error LNK2005: X509_get_ext_d2i already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(asn1_lib.obj) : error LNK2005: ASN1_STRING_data already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(v3_genn.obj) : error LNK2005: GENERAL_NAME_free already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(init.obj) : error LNK2005: OPENSSL_init_crypto already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(x509name.obj) : error LNK2005: X509_NAME_get_entry already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(x509name.obj) : error LNK2005: X509_NAME_ENTRY_get_data already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(x509name.obj) : error LNK2005: X509_NAME_get_index_by_NID already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(bio_lib.obj) : error LNK2005: BIO_free already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(bio_lib.obj) : error LNK2005: BIO_read already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(bio_lib.obj) : error LNK2005: BIO_write already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(a_strex.obj) : error LNK2005: ASN1_STRING_to_UTF8 already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(dh_lib.obj) : error LNK2005: DH_free already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(v3_alt.obj) : error LNK2005: i2v_GENERAL_NAMES already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(rand_lib.obj) : error LNK2005: RAND_seed already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(rand_lib.obj) : error LNK2005: RAND_pseudo_bytes already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(rand_lib.obj) : error LNK2005: RAND_status already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(bss_file.obj) : error LNK2005: BIO_new_file already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(pem_pkey.obj) : error LNK2005: PEM_read_bio_DHparams already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(bss_sock.obj) : error LNK2005: BIO_new_socket already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(dh_check.obj) : error LNK2005: DH_check already defined in VBoxRT.lib(VBoxRT.dll)
libcrypto.lib(e_capi.obj) : error LNK2019: unresolved external symbol __imp_CertFreeCertificateContext referenced in function capi_free_key
libcrypto.lib(e_capi.obj) : error LNK2019: unresolved external symbol __imp_CertGetCertificateContextProperty referenced in function capi_get_prov_info
libcrypto.lib(e_capi.obj) : error LNK2019: unresolved external symbol __imp_CertOpenStore referenced in function capi_open_store
libcrypto.lib(e_capi.obj) : error LNK2019: unresolved external symbol __imp_CertFindCertificateInStore referenced in function capi_find_cert
libcrypto.lib(e_capi.obj) : error LNK2019: unresolved external symbol __imp_CertEnumCertificatesInStore referenced in function capi_find_cert
libcrypto.lib(e_capi.obj) : error LNK2019: unresolved external symbol __imp_CertCloseStore referenced in function capi_find_key
libcrypto.lib(e_capi.obj) : error LNK2019: unresolved external symbol __imp_CertDuplicateCertificateContext referenced in function capi_load_ssl_client_cert
C:/Devel/VirtualBox-src/out/win.amd64/release/obj/vboxwebsrv/vboxwebsrv.exe : fatal error LNK1120: 7 unresolved externals
If I edit stdsoap2.cpp and replace that one X509_STORE_set_flags() call with
those 4 lines from 2.8.44, everything is compiled and linked without any errors
or warnings.
I then tried to substitute OpenSSL functions to find out how they might cause
such linkage problem. I ended up with even stranger results.
1. First, I take the "patched" 2.8.45 version which compiles correctly.
2. Then I add the x509_store_st structure definition into stdsoap2.cpp by
copying it from openssl-1.1.0e\crypto\x509\x509_lcl.h (I will need it later);
check that it still compiles without any problems.
3. In the openssl-1.1.0e\crypto\x509\x509_lu.c I find the function definition:
int X509_STORE_set1_param(X509_STORE *ctx, X509_VERIFY_PARAM *param)
{
return X509_VERIFY_PARAM_set1(ctx->param, param);
}
and replace X509_STORE_set1_param() call in the stdsoap2.cpp with the its
contents:
X509_VERIFY_PARAM *param = X509_VERIFY_PARAM_new();
X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK);
X509_VERIFY_PARAM_set1(store->param, param); /* <---- HERE */
X509_VERIFY_PARAM_free(param);
4. Now I try to compile the code - and obtain the same linker errors posted
above! (Plus 3 more duplicates: X509_VERIFY_PARAM_free, X509_VERIFY_PARAM_new,
X509_VERIFY_PARAM_set_flags).
What is happening here?
--
Bye. With best regards,
Konstantin Vlasov.
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