EVP_EncryptFinal and EVP_DecryptFinal must be used only one time after the
last update.
2011/11/28 Jussi Peltonen <pelt...@gmail.com>:
> I think I'm loadaing the correct DLL versions.
>
> From the Visual Studio IDE I can see that the libaye32.dll is loaded
> from the debug folder where I copied it.
>
> libeay32.dll D:\work\openssl\ssl_test\debug\libeay32.dll N/A N/A
> Symbols
> loaded. D:\work\openssl\ssl_test\debug\libeay32.pdb 5 1.00.0.5
> 25.11.2011
> 11:34 10000000-10113000 [7580] ssl_test.exe: Native
>
> libeay32.dll is of version 1.0.0.5. I have built it from the source code.
>
> Having the libeay32.pdb file in the same folder I'm able to step into
> EVP_DecryptUpdate():
>
> evp_enc.c, lines 426-427:
>
> if (fix_len)
> *outl += b;
>
> The "fix_len" flag"is not set during the first decrypt block but is
> set during the rest of the blocks as the output of my test program
> shows. Because of that increment the output buffer in my program
> becomes larger that the original data before it is encrypted.
>
> outp += (olen + tlen); // olen too big here
>
>
> 2011/11/28 Michael S. Zick <open...@morethan.org>:
>> On Mon November 28 2011, Jussi Peltonen wrote:
>>> Mike,
>>> Did you read the original post? Why does not the blowfish sample work
>>> on Windows XP?
>>>
>>
>> Yup,
>> My guess is a similar problem -
>> not loading the *.dll version that you expected/intended to load
>> or not linking against the *.dll version that you expected/intended.
>>
>> M$ and *nix systems use different library locating/loading
>> algorithms - I can't help you with sorting out your M$ problem.
>>
>> Mike
>>
>>> Jussi
>>>
>>> 2011/11/28 Michael S. Zick <open...@morethan.org>:
>>> > On Mon November 28 2011, Jussi Peltonen wrote:
>>> >> No, it doesn't work on Linux either, if I link my test program using
>>> >> OpenSSL 1.0.0e.
>>> >>
>>> >> The test program works on Linux if I link it differently.
>>> >>
>>> >> $ ldd blowfish
>>> >> libcrypto.so.1 => /usr/lib/libcrypto.so.1 (0x40022000)
>>> >> libc.so.6 => /lib/i686/libc.so.6 (0x400de000)
>>> >> libdl.so.2 => /lib/libdl.so.2 (0x4020e000)
>>> >> /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)
>>> >>
>>> >>
>>> >> /usr/lib/libcrypto.so -> libcrypto.so.0.9.6
>>> >>
>>> >> Is this a bug?
>>> >>
>>> >
>>> > Only of your installation's /etc/ld.so.conf contents. ;-)
>>> > or the included files/directories.
>>> >
>>> > Fix as required and then run ldconfig, see: "man ldconfig"
>>> >
>>> > Mike
>>> >> Jussi
>>> >>
>>> >> 2011/11/24 Jussi Peltonen <pelt...@gmail.com>:
>>> >> > Hello,
>>> >> >
>>> >> > newbie question regarding the Blowfish algorithm: why do my
>>> >> > encrypt/decypt functions fail on Windows XP SP3 with OpenSSL 1.0.0e?
>>> >> > The same functions work on my Linux workstation.
>>> >> >
>>> >> > Windows output:
>>> >> > ============
>>> >> > Encrypt:
>>> >> > encrypting 7680 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 512 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > encrypted 7744 bytes
>>> >> >
>>> >> > Decrypt:
>>> >> > decrypting 7744 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1032 bytes <= why 1032 instead of 1024?
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1032 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1032 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1032 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1032 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1032 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 520 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > decrypted 7736 bytes
>>> >> >
>>> >> > Linux output:
>>> >> > ==========
>>> >> > encrypting 7680 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > EVP_DecryptUpdate 512 bytes
>>> >> > EVP_DecryptFinal 8 bytes
>>> >> > encrypted 7744 bytes
>>> >> >
>>> >> > decrypting 7744 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 1024 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > EVP_DecryptUpdate 512 bytes
>>> >> > EVP_DecryptFinal 0 bytes
>>> >> > decrypted 7680 bytes
>>> >> >
>>> >> >
>>> >> > Source code:
>>> >> >
>>> >> > static int
>>> >> > decrypt (unsigned char *inbuf, int size, unsigned char *outbuf,
>>> >> > int *outsz)
>>> >> > {
>>> >> > int olen, tlen, n, left;
>>> >> > unsigned char *inp = inbuf;
>>> >> > unsigned char *outp = outbuf;
>>> >> > EVP_CIPHER_CTX ctx;
>>> >> >
>>> >> > printf("decrypting %d bytes\n", size);
>>> >> >
>>> >> > EVP_CIPHER_CTX_init (&ctx);
>>> >> > EVP_DecryptInit (&ctx, EVP_bf_cbc (), key, iv);
>>> >> >
>>> >> > left = size;
>>> >> > *outsz = 0;
>>> >> >
>>> >> > while (left > 0)
>>> >> > {
>>> >> > n = (left > OP_SIZE ? OP_SIZE : left);
>>> >> > olen = 0;
>>> >> > memset((void *)outp, 0, IP_SIZE);
>>> >> > if (EVP_DecryptUpdate (&ctx, outp, &olen, inp, n) != 1)
>>> >> > {
>>> >> > return -1;
>>> >> > }
>>> >> > printf("EVP_DecryptUpdate %d bytes\n", olen);
>>> >> >
>>> >> > if (EVP_DecryptFinal (&ctx, outp + olen, &tlen) != 1)
>>> >> > {
>>> >> > return -1;
>>> >> > }
>>> >> > printf("EVP_DecryptFinal %d bytes\n", tlen);
>>> >> >
>>> >> > *outsz = ((*outsz) + olen + tlen);
>>> >> > inp += n;
>>> >> > left -= n;
>>> >> > outp += (olen + tlen);
>>> >> > }
>>> >> >
>>> >> > printf("decrypted %d bytes\n", *outsz);
>>> >> >
>>> >> > EVP_CIPHER_CTX_cleanup (&ctx);
>>> >> > return 0;
>>> >> > }
>>> >> >
>>> >> > static int
>>> >> > encrypt (unsigned char *inbuf, int size, unsigned char *outbuf, int
>>> >> > *outsz)
>>> >> > {
>>> >> > int olen, tlen, n, left;
>>> >> > unsigned char *inp = inbuf;
>>> >> > unsigned char *outp = outbuf;
>>> >> > EVP_CIPHER_CTX ctx;
>>> >> >
>>> >> > printf("encrypting %d bytes\n", size);
>>> >> >
>>> >> > EVP_CIPHER_CTX_init (&ctx);
>>> >> > EVP_EncryptInit (&ctx, EVP_bf_cbc (), key, iv);
>>> >> >
>>> >> >
>>> >> > left = size;
>>> >> > *outsz = 0;
>>> >> >
>>> >> > while (left > 0)
>>> >> > {
>>> >> > n = (left > IP_SIZE ? IP_SIZE : left);
>>> >> > olen = 0;
>>> >> > if (EVP_EncryptUpdate (&ctx, outp, &olen, inp, n) != 1)
>>> >> > {
>>> >> > return -1;
>>> >> > }
>>> >> > printf("EVP_DecryptUpdate %d bytes\n", olen);
>>> >> >
>>> >> > if (EVP_EncryptFinal (&ctx, outp + olen, &tlen) != 1)
>>> >> > {
>>> >> > return -1;
>>> >> > }
>>> >> > printf("EVP_DecryptFinal %d bytes\n", tlen);
>>> >> >
>>> >> > *outsz = ((*outsz) + olen + tlen);
>>> >> > inp += n;
>>> >> > left -= n;
>>> >> > outp += (olen + tlen);
>>> >> > }
>>> >> >
>>> >> > printf("encrypted %d bytes\n", *outsz);
>>> >> >
>>> >> > EVP_CIPHER_CTX_cleanup (&ctx);
>>> >> > return 0;
>>> >> > }
>>> >> >
>>> >> > Cheers,
>>> >> > Jussi
>>> >> >
>>> >> ______________________________________________________________________
>>> >> OpenSSL Project http://www.openssl.org
>>> >> User Support Mailing List openssl-users@openssl.org
>>> >> Automated List Manager majord...@openssl.org
>>> >>
>>> >>
>>> >
>>> >
>>> > ______________________________________________________________________
>>> > OpenSSL Project http://www.openssl.org
>>> > User Support Mailing List openssl-users@openssl.org
>>> > Automated List Manager majord...@openssl.org
>>> >
>>> ______________________________________________________________________
>>> OpenSSL Project http://www.openssl.org
>>> User Support Mailing List openssl-users@openssl.org
>>> Automated List Manager majord...@openssl.org
>>>
>>>
>>
>>
>> ______________________________________________________________________
>> OpenSSL Project http://www.openssl.org
>> User Support Mailing List openssl-users@openssl.org
>> Automated List Manager majord...@openssl.org
>>
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