OPENSSL_Uplink no OPENSSL_Applink 错误分析

分析1:

我新建了一个dll A.dll,而A.dll要调用openssl的dll, 然后新建一个win32应用程序B去调用A中的导出函数,此时必须include一次且仅一次 /include/openssl/applink.c 到你的B工程里去,而不能include到A.dll工程里,或者把/include/openssl/applink.c拷贝到B个工程里去,否则就会出现,运行时错误 OPENSSL_Uplink(0098E000,07): no OPENSSL_Applink

因为openssl源码Uplink.c中是这样子 : h=GetModuleHandle(NULL))   applink=(void**(*)())GetProcAddress(h,"OPENSSL_Applink");

可以看出 openssl 通过GetModuleHandle(NULL)取得的句柄h去调用Applink()函数(Applink函数就是applink.c中的一个导出函数), Applink()函数不属于openssl的dll内部函数的一部分(通过dll分析器看出这个函数不存在),但是因为GetModuleHandle(NULL)取得的句柄会始终指向应用程序的句柄(比如上面例子中的B工程)而非dll句柄, 所以必须把applink.c文件应用程序的一部分编译.

下面是我在openssl-user mail list中的提问,和有些人给我的答复:

From: [email protected]
To: [email protected]
Subject: RE: OPENSSL_Uplink(0099E000,07): no OPENSSL_Applink
Date: Wed, 12 Nov 2008 01:51:11 +0000

hi Ger Hobbelt
 thank you soooooooo much .
your answer 2) solve my problem well. 
because there exists libeay32.dll ,ssleay32.dll ,my own dll and my application. my own dll call  libeay32.dll and ssleay32.dll. And my application call my own dll.
according to Ger Hobbelt's suggestion 2), firstly I used a tool to analyse the exports functions of  libeay32.dll ,ssleay32.dll and  my own dll.  I found that dll exports functions don't contain OPENSSL_Applink() function.  Also I look up the source code of Uplink.c which call OPENSSL_Applink() function.  Uplink.c use  to get a handle h, and then use to got the address of OPENSSL_Applink() .  when I use libeay32.dll ,ssleay32.dll in my application , this handle h will point to the application but not my own dll.
So I should add applink.c to my application as a part of my application source code , never add it to my own dll source code.
 
Leo Yang

Best Regards
 
MSN: [email protected]



> Date: Tue, 11 Nov 2008 17:35:03 +0100
> From: [email protected]
> To: [email protected]
> Subject: Re: OPENSSL_Uplink(0099E000,07): no OPENSSL_Applink
> CC: [email protected]
> 
> Hm, never used this OPENSSL_Uplink/Applink glue before... (I have my
> own OpenSSL MSVC2005 projects, which I always use inside my solutions)
> 
> Anyway, a quick check leads me to two possible answers:
> 
> 1) somewhere APPMACROS_ONLY was #define'd before your actual
> 
> > extern "C"
> > {
> > #include
> > }
> 
> code bit.
> 
> A simple change should be able to verify if this is actually the matter:
> 
> extern "C"
> {
> #undef APPMACROS_ONLY
> #include
> }
> 
> as then the problem should be gone.
> 
> However, there's a chance:
> 
> 2) ... that you are compiling this code into a DLL of your own (given
> your description of the issue, my guess is this is what you are doing.
> Correct?).
> 
> Given that the Uplink code looks at the *application module* for the
> Applink export, you may not find it when it is actually exported from
> a DLL instead of the EXE itself.
> 
> NOTE: the above is 'guesswork': I haven't checked.
> 
> 
> To fix the above, moving the
> 
> > extern "C"
> > {
> > #include
> > }
> 
> code snippet to the main application source code should resolve the
> matter, preferrably by placing it in the same source file as your
> WinMain() / main() function.
> 
> 
> 
> To help you see who exports what and depends on whom, you may search
> the Net for a free tool called 'Dependency Walker' (
> http://www.dependencywalker.com/ ) which is a very handy tool when you
> need to check what is going regarding DLL/EXE dependencies and
> function/data import/exports.
> 
> 
> 
> 
> 
> 
> On Tue, Nov 11, 2008 at 11:09 AM, 念材 杨 wrote:
> > hi all
> >
> > I meet a run time error "OPENSSL_Uplink(0099E000,07): no OPENSSL_Applink"
> > which feaze me several days.
> > this is my project description:
> > I had download openssl-0.9.8i. then build it and install it correctly
> > following the INSTALL.WIN32 instruction.
> > I use vs2005 to develop my project
> > and I had set vs2005 environment such as "MultiThread Debug DLL" etc.
> > Because it works well in my other projects.
> > this project is a bit different because the below function is called by a
> > dll project. but the function is the same in dll project and application
> > project.
> > [source code]
> > // "MyCryptlib.cpp"
> > #include "stdafx.h"
> > #include
> > #include "MyCryptlib.h"
> > #include
> > using namespace std;
> > extern "C"
> > {
> > #include
> > }
> > CONF *config=NULL;
> > BIO *bio_err=NULL;
> > // encrypt data
> > #define RSA_SIGN 1
> > #define RSA_VERIFY 2
> > #define RSA_ENCRYPT 3
> > #define RSA_DECRYPT 4
> > #define KEY_PRIVKEY 1
> > #define KEY_PUBKEY 2
> > #define KEY_CERT 3
> > //int EncryptData()
> > int EncryptData(unsigned char* indata, unsigned char* outdata, char*
> > pubkeyfile, int& len)
> > {
> >
> >
> > ENGINE *e = NULL;
> > BIO *in = NULL, *out = NULL;
> > char *infile = NULL, *outfile = NULL;
> > #ifndef OPENSSL_NO_ENGINE
> > char *engine = NULL;
> > #endif
> > char *keyfile = NULL;
> > char rsa_mode = RSA_VERIFY, key_type = KEY_PRIVKEY;
> > int keyform = FORMAT_PEM;
> > char need_priv = 0, badarg = 0, rev = 0;
> > char hexdump = 0, asn1parse = 0;
> > X509 *x;
> > EVP_PKEY *pkey = NULL;
> > RSA *rsa = NULL;
> > unsigned char *rsa_in = NULL, *rsa_out = NULL, pad;
> > char *passargin = NULL, *passin = NULL;
> > int rsa_inlen, rsa_outlen = 0;
> > int keysize;
> > int ret = 1;
> >
> > CRYPTO_malloc_init();
> > SSL_library_init();
> > if(!bio_err) bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
> > if (!load_config(bio_err, NULL))
> > goto end;
> > ERR_load_crypto_strings();
> > OpenSSL_add_all_algorithms();
> > pad = RSA_PKCS1_PADDING;
> >
> >
> > rsa_mode = RSA_ENCRYPT;
> > key_type = KEY_PUBKEY;
> > keyfile = pubkeyfile;
> > //infile = "data.txt";
> > //outfile = "data.ssl";
> > //cerr <<"just for testing BIO_printf/n" << endl;
> >
> > if(need_priv && (key_type != KEY_PRIVKEY)) {
> > BIO_printf(bio_err, "A private key is needed for this operation/n");
> > goto end;
> > }
> > #ifndef OPENSSL_NO_ENGINE
> > e = setup_engine(bio_err, engine, 0);
> > #endif
> > if(!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {
> > BIO_printf(bio_err, "Error getting password/n");
> > goto end;
> > }
> > /* FIXME: seed PRNG only if needed */
> > app_RAND_load_file(NULL, bio_err, 0);
> >
> > switch(key_type) {
> > case KEY_PRIVKEY:
> > pkey = load_key(bio_err, keyfile, keyform, 0,
> > passin, e, "Private Key");
> > break;
> > case KEY_PUBKEY:
> > pkey = load_pubkey(bio_err, keyfile, keyform, 0,
> > NULL, e, "Public Key");
> > break;
> > case KEY_CERT:
> > x = load_cert(bio_err, keyfile, keyform,
> > NULL, e, "Certificate");
> > if(x) {
> > pkey = X509_get_pubkey(x);
> > X509_free(x);
> > }
> > break;
> > }
> > if(!pkey) {
> > return 1;
> > }
> > rsa = EVP_PKEY_get1_RSA(pkey);
> > EVP_PKEY_free(pkey);
> > if(!rsa) {
> > BIO_printf(bio_err, "Error getting RSA key/n");
> > ERR_print_errors(bio_err);
> > goto end;
> > }
> >
> > if(infile) {
> > if(!(in = BIO_new_file(infile, "rb"))) {
> > BIO_printf(bio_err, "Error Reading Input File/n");
> > ERR_print_errors(bio_err);
> > goto end;
> > }
> > } else in = BIO_new_fp(stdin, BIO_NOCLOSE);
> > if(outfile) {
> > if(!(out = BIO_new_file(outfile, "wb"))) {
> > BIO_printf(bio_err, "Error Reading Output File/n");
> > ERR_print_errors(bio_err);
> > goto end;
> > }
> > } else {
> > out = BIO_new_fp(stdout, BIO_NOCLOSE);
> > #ifdef OPENSSL_SYS_VMS
> > {
> > BIO *tmpbio = BIO_new(BIO_f_linebuffer());
> > out = BIO_push(tmpbio, out);
> > }
> > #endif
> > }
> > keysize = RSA_size(rsa);
> > rsa_in = (unsigned char *)OPENSSL_malloc(keysize * 2);
> > rsa_out = (unsigned char *)OPENSSL_malloc(keysize);
> > /* Read the input data */
> > //rsa_inlen = BIO_read(in, rsa_in, keysize * 2);
> > rsa_inlen = strlen((char *)indata);
> > strcpy((char*)rsa_in, (char*)indata);
> > if(rsa_inlen <= 0) {
> > BIO_printf(bio_err, "Error reading input Data/n");
> > exit(1);
> > }
> >
> > if(rev) {
> > int i;
> > unsigned char ctmp;
> > for(i = 0; i < rsa_inlen/2; i++) {
> > ctmp = rsa_in[i];
> > rsa_in[i] = rsa_in[rsa_inlen - 1 - i];
> > rsa_in[rsa_inlen - 1 - i] = ctmp;
> > }
> > }
> > switch(rsa_mode) {
> > case RSA_VERIFY:
> > rsa_outlen = RSA_public_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
> > break;
> > case RSA_SIGN:
> > rsa_outlen = RSA_private_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
> > break;
> > case RSA_ENCRYPT:
> > rsa_outlen = RSA_public_encrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
> > break;
> > case RSA_DECRYPT:
> > rsa_outlen = RSA_private_decrypt(rsa_inlen, rsa_in, rsa_out, rsa, pad);
> > break;
> > }
> >
> > if(rsa_outlen <= 0) {
> > BIO_printf(bio_err, "RSA operation error/n");
> > ERR_print_errors(bio_err);
> > goto end;
> > }
> > memcpy(outdata, rsa_out, rsa_outlen);
> > outdata[rsa_outlen] = 0;
> > len = rsa_outlen;
> > //cout<<"%%%%%%%%%%len%%%%%%%%%"< > > ret = 0;
> > if(asn1parse) {
> > if(!ASN1_parse_dump(out, rsa_out, rsa_outlen, 1, -1)) {
> > ERR_print_errors(bio_err);
> > }
> > } else if(hexdump) BIO_dump(out, (char *)rsa_out, rsa_outlen);
> > else BIO_write(out, rsa_out, rsa_outlen);
> > end:
> > RSA_free(rsa);
> > BIO_free(in);
> > BIO_free_all(out);
> > if(rsa_in) OPENSSL_free(rsa_in);
> > if(rsa_out) OPENSSL_free(rsa_out);
> > if(passin) OPENSSL_free(passin);
> > return ret;
> > }
> >
> > this function use a pass in a buffer (indata) , and expect a buffer
> > (outdata) out. outdata contains encrypted data.
> >
> > please help me ! thank you for your kind in advance.
> >
> > by the way, I wirte above EncryptData function referring to rsa source code.
> >
> >
> >
> >
> >
> >
> >
> > ________________________________
> > Invite your mail contacts to join your friends list with Windows Live
> > Spaces. It's easy! Try it!
> 
> 
> 
> -- 
> Met vriendelijke groeten / Best regards,
> 
> Ger Hobbelt
> 
> --------------------------------------------------
> web: http://www.hobbelt.com/
> http://www.hebbut.net/
> mail: [email protected]
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