Lost data at the buffer during symmetric block encryption
Dear All,
I am sorry to bother you...I need your help...
Have you faced such problem - loose some data at the end of a buffer...
The code is like this
I want to encrypt a file 1024 blocks by 1024 blocks
and at the final block which is not 1024 blocks will do the final management
like follows:
unsigned char inbuf[1024], outbuf[1024];
// Obtain the file size
fseek(fin, 0, SEEK_END);
size = ftell(fin);
rewind(fin);
buffer = (char *)malloc(size);
output = (char *)malloc(size);
int shift = 0;
int kBufferSize = 1024;
fread(buffer, 1, size, fin);
if (buffer == NULL) exit(2);
// THE PROBLEM STARTS HERE, TAKE 1024 BYTES SLIDINGLY
while (shift size) {
inlen = 0;
for (int i=0; ikBufferSize; i++) {
if (i+shift size){
inbuf[i] = (unsigned)buffer[i+shift];
inlen++;
}
}
if (!EVP_DecryptUpdate(ctx, outbuf, outlen, inbuf, inlen)) {
printf(ERROR 1);
exit(-1);
}
for (int j=0; joutlen; j++)
if (j+shift size) {
output[j+shift] = (char)outbuf[j];
printf(%c, output[j+shift]); //PRINT 1
}
shift+=kBufferSize;
}
if (!EVP_DecryptFinal(ctx, outbuf, outlen)) {
printf(ERROR 2);
exit(-1);
}
for (int k=0; koutlen; k++) {
output[k+shift] = (char)outbuf[k];
printf(%c, output[k+shift]); //PRINT 2
}
printf(\nsize:%d\n, size); // PRINT 3
printf(output size:%d\n, strlen(output)); // PRINT 4
for (int x=0; xsize; x++) {
printf(%c, output[x]); // PRINT 5
}
fwrite(output, 1, size, fout);
===
You don't have to look into the codes. When I try to deal with a file
test.txt which has a sentence This is a test.. The problem is at the end
of the code, it prints out:
This is a test. //THIS IS THE CORRECT DATA IN OUTPUT BUFFER (PRINT 1 2)
size: 16 //THIS IS THE SIZE OF THE FILE WHICHI IS CORRECT TOO (PRINT 3)
output size: 8 //NOW I DON'T UNDERSTAND WHY HERE... (PRINT 4)
This is //THERE IS SOME DATA MISSED IN THE OUTPUT BUFFER (PRINT 5)
Please help me if you have the time. I don't know why there is some data
lost in the buffer...
Thousand thanks. Wish you all the best.
Best regards,
Jordan Cheun Ngen, Chong
INF-4067 Universiteit Twente
Postbus 217
7500 AE Enschede
The Netherlands
Distributed and Embedded Systems (DIES)
Office Phone: +31 53 4894655
Web site: http://www.cs.utwente.nl/~chong
Email Add.: [EMAIL PROTECTED]
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Encrypt and decrypt a big char array
Dear all, Sorry to bother you. I wish to encrypt a big chunk of char array (like 3000bytes) using a symmetric key (for example Blowfish 16 bytes)... However I am not sure how to do that... Could you please help me out?? I really need your expertise for this issue. Thank you very much. Wish you all the best Best regards, Jordan Cheun Ngen, Chong INF-4067 Universiteit Twente Postbus 217 7500 AE Enschede The Netherlands Distributed and Embedded Systems (DIES) Office Phone: +31 53 4894655 Web site: http://www.cs.utwente.nl/~chong Email Add.: [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
Problems with BIO_s_mem and BIO_s_file
Dear all,
I have an encrypted char *, to be decrypted using the private key read from
the PKCS12 protection file (which is done!!). Now the problem lies into the
BIO_s_mem and BIO_s_file (the encrypted char * is Base64 encoded)
I have run the two tests:
1. Store the char * into a file called temp.tmp, and write the following
code:
/* START **/
b64 = BIO_new(BIO_f_base64());
bio2 = BIO_new_file(temp.tmp, rb);
bio2 = BIO_push(b64, bio2);
if ((inlen2 = BIO_read(bio2, ecryptedData, 128)) = 0) {
printf(error 1);
exit(-1);
}
encryptedData[128] = '\0';
// decryption with the private key
if (EVP_PKEY_decrypt(decryptedData, encryptedData, 128, privKey) == -1) {
printf(error 2);
exit(-1);
}
/ END */
IT WORKS FINE!
2. Then I test the following code, by reading in the char * directly into a
BIO_s_mem:
/* START **/
b64 = BIO_new(BIO_f_base64());
bio2 = BIO_new(BIO_s_mem());
BIO_write(bio2, data, 128);
bio2 = BIO_push(b64, bio2);
if ((inlen2 = BIO_read(b64, encryptedData, 128)) = 0) {
printf(error 1);
exit(-1);
}
encryptedData[128] = '\0';
// decryption with the private key
if (EVP_PKEY_decrypt(decryptedData, encryptedData, 128, privKey) == -1) {
printf(error 2);
exit(-1);
}
/ END */
THE MESSAGE error 2 is printed.
What is the difference (of course there must be a difference, but I wish you
could help me)? Is there something wrong with the code 2? When I printed out
the encryptedData array as a string (printf(%s\n, encryptedData)), they
look the same. Please help. Thousand thanks.
Best regards,
Jordan Cheun Ngen, Chong
INF-4067 Universiteit Twente
Postbus 217
7500 AE Enschede
The Netherlands
Distributed and Embedded Systems (DIES)
Office Phone: +31 53 4894655
Web site: http://www.cs.utwente.nl/~chong
Email Add.: [EMAIL PROTECTED]
__
OpenSSL Project http://www.openssl.org
User Support Mailing List[EMAIL PROTECTED]
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RE: How to load a P12 certificate?
Title: ??: How to load a P12 certificate?
Thanks
to you, YongYue,
HoweverI am not sure what do you mean by
"Initialize lib..."
Could
you please be more specific? I am really sorry to bother you
again.
Thanks
again for your help.
Best
regards,Jordan Cheun Ngen,
ChongINF-4067 Universiteit TwentePostbus 2177500 AE EnschedeThe
NetherlandsDistributed and Embedded Systems
(DIES)Office Phone: +31 53
4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.:
[EMAIL PROTECTED]
-Original Message-From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of YONG.YUESent: Tuesday, September 18, 2001 3:12
AMTo: '[EMAIL PROTECTED]'Subject: ??: How to
load a P12 certificate?
i think
u should initialize the openssl lib first..
--: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] Jordan C N
Chong: 2001917 21:04:
[EMAIL PROTECTED]: RE: How to load a P12
certificate?
Dear YongYue
I
am sorry to bother you again. Thousand thanks for your help indeed. After
testing your code, sadly it doesn't work. I have done two tests on the
codes:
1.
Put nothing (or some wrong password) at the password field during
parsing
2.
Test whether the m_pcert and m_pkey are NULL
the first one doesn't do anything at all to the
codes.
the second one, well I am not sure, m_pkey is
NULL.
I
do need your help. Thousand thanks.
All the best.
Best
regards,Jordan Cheun
Ngen, ChongINF-4067 Universiteit TwentePostbus 2177500 AE
EnschedeThe NetherlandsDistributed and Embedded Systems
(DIES)Office Phone: +31
53 4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.:
[EMAIL PROTECTED]
-Original Message-From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of
YONG.YUESent: Thursday, September 13, 2001 10:54
AMTo: '[EMAIL PROTECTED]'Subject: ??: How to
load a P12 certificate?
just refer to this code
// new bio mem
area m_biopkcs12 = BIO_new_file(szpkcsfile, "rb");
if(m_biopkcs12
== NULL) {
bError =
false;
goto
finish; } // parse pkcs12
m_pkcs12 =
d2i_PKCS12_bio(m_biopkcs12, NULL);
if(m_pkcs12 ==
NULL) {
bError =
false;
goto
finish; } // nLen = PKCS12_parse(m_pkcs12, szpkcspasswd, m_pkey,
m_pcert, NULL);
if(nLen 0)
{
bError =
false;
goto
finish; } // BIO_free_all(m_biopkcs12);
return
true;
Look at PKCS12_Parse(). You provide it a buffer
with the PKCS#12 and the password for the
private key, and it returns an X509 object
and a EVP_PKEY object.
Could you please tell me, which document should I look to
regards this? Thanks again for your help. Wish you
all the best.
__
OpenSSL
Project
http://www.openssl.org User
Support Mailing
List
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Manager
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Padding?
Dear all, Sorry to bother you all. I am doing symmetric encryption and decryption. For encryption, I am using Java class libraries from IAIK. For decryption, I wish to use OpenSSL cryptography library. I am using Blowfish algorithm. For encryption, using CBC mode and PKCS5 padding. Therefore, I wish to know whether OpenSSL cryptography provides standard padding service? From that, IV may (I reckon) be avoided... (If I am wrong, could you please correct me?). Do you have any suggestions? Thank you very much. wish you all the best. Best regards, Jordan Cheun Ngen, Chong INF-4067 Universiteit Twente Postbus 217 7500 AE Enschede The Netherlands Distributed and Embedded Systems (DIES) Office Phone: +31 53 4894655 Web site: http://www.cs.utwente.nl/~chong Email Add.: [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
Padding for symmetric algorithm
Dear all, Sorry to bother you all. If you have received this email before, I am sorry to send it again because my mail server has some problem. I wish to do symmetric encryption and decryption. For encryption, I am using Java crypthography library from IAIK. For decryption, I am using OpenSSL C++ cryptography library. At encryption, I am using blowfish, CBC mode, and PKCS5 padding. Does OpenSSL cryptography library support PKCS standard padding, so that IV is not needed (please correct me if I am wrong about this statement). And, I have a char * of blowfish key which is encoded from the key generated by using Java cryptography library. Is there a routine to convert this char * into the blowfish key using OpenSSL? Your help is highly appreciated. Thousand thanks. Wish you all the best. Best regards, Jordan Cheun Ngen, Chong INF-4067 Universiteit Twente Postbus 217 7500 AE Enschede The Netherlands Distributed and Embedded Systems (DIES) Office Phone: +31 53 4894655 Web site: http://www.cs.utwente.nl/~chong Email Add.: [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
Padding?
Dear all, Sorry to bother. Does symmetric algorithm provided by OpenSSL cryptography library support padding? Like PKCS5 Padding for Blowfish encryption and decryption (for IV). Thanks. Best regards, Jordan Cheun Ngen, Chong INF-4067 Universiteit Twente Postbus 217 7500 AE Enschede The Netherlands Distributed and Embedded Systems (DIES) Office Phone: +31 53 4894655 Web site: http://www.cs.utwente.nl/~chong Email Add.: [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
Confused with the cryptography library.
Dear all, I am using Openssl 0.9.6 cryptograhy library. According to http://www.openssl.org/docs/crypto/EVP_EncryptInit.html there is a method EVP_CIPHER_CTX_set_padding under openssl/evp.h However I tried to find it, I couldn't find it. Is it because this is the incorrect version, or there is other reasons? Please help. Thank you very much. Best regards, Jordan Cheun Ngen, Chong INF-4067 Universiteit Twente Postbus 217 7500 AE Enschede The Netherlands Distributed and Embedded Systems (DIES) Office Phone: +31 53 4894655 Web site: http://www.cs.utwente.nl/~chong Email Add.: [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
RE: How to load a P12 certificate?
Title: ??: How to load a P12 certificate?
Dear
YongYue
I am
sorry to bother you again. Thousand thanks for your help indeed. After testing
your code, sadly it doesn't work. I have done two tests on the
codes:
1. Put
nothing (or some wrong password) at the password field during
parsing
2.
Test whether the m_pcert and m_pkey are NULL
the
first one doesn't do anything at all to the codes.
the
second one, well I am not sure, m_pkey is NULL.
I do
need your help. Thousand thanks.
All
the best.
Best
regards,Jordan Cheun Ngen,
ChongINF-4067 Universiteit TwentePostbus 2177500 AE EnschedeThe
NetherlandsDistributed and Embedded Systems
(DIES)Office Phone: +31 53
4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.:
[EMAIL PROTECTED]
-Original Message-From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of YONG.YUESent: Thursday, September 13, 2001 10:54
AMTo: '[EMAIL PROTECTED]'Subject: ??: How to
load a P12 certificate?
just refer to this code
// new bio mem
area m_biopkcs12 = BIO_new_file(szpkcsfile, "rb");
if(m_biopkcs12 ==
NULL) {
bError = false;
goto finish;
}
// parse
pkcs12 m_pkcs12 = d2i_PKCS12_bio(m_biopkcs12, NULL);
if(m_pkcs12 ==
NULL) {
bError = false;
goto finish;
}
//
nLen =
PKCS12_parse(m_pkcs12, szpkcspasswd, m_pkey, m_pcert, NULL);
if(nLen
0) {
bError = false;
goto finish;
}
//
BIO_free_all(m_biopkcs12);
return
true;
Look at PKCS12_Parse(). You provide it a buffer
with the PKCS#12 and the password for the private
key, and it returns an X509 object and a EVP_PKEY
object.
Could you please tell me, which document should I look to
regards this? Thanks again for your help. Wish you all
the best.
__
OpenSSL
Project
http://www.openssl.org User Support
Mailing
List
[EMAIL PROTECTED] Automated List
Manager
[EMAIL PROTECTED]
RE: How to load a P12 certificate?
Title: ??: How to load a P12 certificate?
Dear
Yong Yue
It is
you again that helps me :D Thousand thanks.
But
could you please direct me to a documentation about this
codes?
So
that I could understand it more :)
Thousand thanks again for your
kindness
Wish
you all the best
Best
regards,Jordan Cheun Ngen,
ChongINF-4067 Universiteit TwentePostbus 2177500 AE EnschedeThe
NetherlandsDistributed and Embedded Systems
(DIES)Office Phone: +31 53
4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.:
[EMAIL PROTECTED]
-Original Message-From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of YONG.YUESent: Thursday, September 13, 2001 10:54
AMTo: '[EMAIL PROTECTED]'Subject: ??: How to
load a P12 certificate?
just refer to this code
// new bio mem
area m_biopkcs12 = BIO_new_file(szpkcsfile, "rb");
if(m_biopkcs12 ==
NULL) {
bError = false;
goto finish;
}
// parse
pkcs12 m_pkcs12 = d2i_PKCS12_bio(m_biopkcs12, NULL);
if(m_pkcs12 ==
NULL) {
bError = false;
goto finish;
}
//
nLen =
PKCS12_parse(m_pkcs12, szpkcspasswd, m_pkey, m_pcert, NULL);
if(nLen
0) {
bError = false;
goto finish;
}
//
BIO_free_all(m_biopkcs12);
return
true;
Look at PKCS12_Parse(). You provide it a buffer
with the PKCS#12 and the password for the private
key, and it returns an X509 object and a EVP_PKEY
object.
Could you please tell me, which document should I look to
regards this? Thanks again for your help. Wish you all
the best.
__
OpenSSL
Project
http://www.openssl.org User Support
Mailing
List
[EMAIL PROTECTED] Automated List
Manager
[EMAIL PROTECTED]
Encryption and Decryption (as/symmetric)
Dear all, I am terribly sorry for keep spamming you with these questions. I am too fresh and too new to OpenSSL cryptography, and wishing desperately for some documents (I have looked at the SSLeay Documentation) or some information on this useful technology. I really appreciate your help, advices and time for solving my problems. Till now, most of my problems are solved because of your valuable effort. Now, I have several questions which I guess I could solve myself (if I am really good in OpenSSL technology). 1. I get bothered by the unsigned char * and char *. I have to decrypt a symmetric key with a RSA private key. Now, the symmetric key is encoded by Base64 form. It basically is char *. Thanks to Yue's help, I manage to decode the char * using BIO routines. Now, I am not sure I could extract the private key from P12, and I also not sure how to decrypt the char * of key using that private key... ... I tried to use EVP routine (EVP_PKEY_decrypt) but as I said the unsigned thing really bothers me, and the whole application crashed when I run it... PLEASE HELP ME WITH SOME ADVICES OR HINTS... 2. Symmetric decryption with Blowfish. Even if the number 1 is succeded. How to load the char * (or unsigned char *) of the key for the Blowfish decryption?? PLEASE HELP ME WITH SOME HINTS... Thousand thanks for everything. For at least reading this long email. And sorry to bother you again and again. Wish you all the best. Best regards, Jordan Cheun Ngen, Chong INF-4067 Universiteit Twente Postbus 217 7500 AE Enschede The Netherlands Distributed and Embedded Systems (DIES) Office Phone: +31 53 4894655 Web site: http://www.cs.utwente.nl/~chong Email Add.: [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
RE: How to load a P12 certificate?
Thanks to you Dale :) Look at PKCS12_Parse(). You provide it a buffer with the PKCS#12 and the password for the private key, and it returns an X509 object and a EVP_PKEY object. Could you please tell me, which document should I look to regards this? Thanks again for your help. Wish you all the best. __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
Please Help: Crypto library with Visual C++
Dear All, Thousand thanks for your help. I really appreciate that. Your help really means a lot to me... Now, the problem is about the VC setting, I am not sure how to set the directory settings for the project For example, I copied all the files from the directory crypto in the openssl-x-x to another directory, and then rename it to openssl. I include the header file of envelope evp/evp.h. But when I compile the file, the compiler complains it couldn't find the file openssl/opensslconf.h (which exists in the crypto directory). I hope you could understand my problem. So... I am really confused on how to set up the directory. I don't want to modify all the header files. Is there alternative ways? Please help. Thousand thanks. Wish you all the best. Best regards, Jordan Cheun Ngen, Chong INF-4067 Universiteit Twente Postbus 217 7500 AE Enschede The Netherlands Distributed and Embedded Systems (DIES) Office Phone: +31 53 4894655 Web site: http://www.cs.utwente.nl/~chong Email Add.: [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
RE: Please Help: Crypto library with Visual C++
Title: ??: Please Help: Crypto library with Visual C++ thousand thanks for your help :D it helps a lot and it works fine now... Now, pls. one more thing, I tried to decode a Base64 encoded string into the string is (for example) :KljL0/zpzt8Y/UtenpqyMPt3JjQTFV5uofM349JXCY1z2i08XKzTW7LlpgnPDLh48Trbq6b/TErJ3UwFvbo8TOf8l4Xnp9yI6RtTWJlVZzJ5+AnY7lKLThSq8fgpVqwnJGVjfIHev6AI9qKHT+8vhN9tTacdU6WkZ6oYiOTb0jE= I am not sure how Do you know where I could some example codes, or perhaps some references on this stuff? very struggling indeed :) Thanks again for everything. Best regards,Jordan Cheun Ngen, ChongINF-4067 Universiteit TwentePostbus 2177500 AE EnschedeThe NetherlandsDistributed and Embedded Systems (DIES)Office Phone: +31 53 4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.: [EMAIL PROTECTED] -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of YONG.YUESent: Monday, September 10, 2001 11:17 AMTo: '[EMAIL PROTECTED]'Subject: ??: Please Help: Crypto library with Visual C++ i think all necessary files for your application is as follows: openssl-0.9.6a/out32dll/ : ssleay32.dll libeay32.dll ssleay32.lib libeay32.rls openssl-0.9.6a/inc32/openssl - this directory contains all head files needed you can do this by two means first : you copy the inc32/openssl to the vc include directory such as D:\Program Files\Microsoft Visual Studio\VC98\INCLUDE\openssl ... vc++ can find this head file automaticly. this one seems much more easy ..haha second ..you make a directory called include parallel to your project diectory.. copy openssl head files to this directory .. then in your project setting: c++ /preprocessor /additonal include directories ... add : ..\include then all ok .. have a good time -ÔʼÓʼþ- ·¢¼þÈË: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]´ú±í Jordan C N Chong ·¢ËÍʱ¼ä: 2001Äê9ÔÂ10ÈÕ 15:43 ÊÕ¼þÈË: openss-user Ö÷Ìâ: Please Help: Crypto library with Visual C++ Dear All, Thousand thanks for your help. I really appreciate that. Your help really means a lot to me... Now, the problem is about the VC setting, I am not sure how to set the directory settings for the project For example, I copied all the files from the directory "crypto" in the "openssl-x-x" to another directory, and then rename it to "openssl". I include the header file of envelope "evp/evp.h". But when I compile the file, the compiler complains it couldn't find the file "openssl/opensslconf.h" (which exists in the "crypto" directory). I hope you could understand my problem. So... I am really confused on how to set up the directory. I don't want to modify all the header files. Is there alternative ways? Please help. Thousand thanks. Wish you all the best. Best regards, Jordan Cheun Ngen, Chong INF-4067 Universiteit Twente Postbus 217 7500 AE Enschede The Netherlands Distributed and Embedded Systems (DIES) Office Phone: +31 53 4894655 Web site: http://www.cs.utwente.nl/~chong Email Add.: [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
RE: Please Help: Crypto library with Visual C++
Title: ??: Please Help: Crypto library with Visual C++ Dear Yong Yue I am sorry to bother you again. The description is clear enough on the URL you gave me. However, I looked at the BIO explanation on http://www.columbia.edu/~ariel/ssleay/bio.html I am not sure how to read in some data from a file to the BIO filter/sink/source Is there any example for this purpose? I am really really terribly sorry to bother you. Thanks for your help. Wish you all the best. Best regards,Jordan Cheun Ngen, ChongINF-4067 Universiteit TwentePostbus 2177500 AE EnschedeThe NetherlandsDistributed and Embedded Systems (DIES)Office Phone: +31 53 4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.: [EMAIL PROTECTED] -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of YONG.YUESent: Monday, September 10, 2001 12:19 PMTo: '[EMAIL PROTECTED]'Subject: ??: Please Help: Crypto library with Visual C++ u can follow this link: http://www.openssl.org/docs/crypto/BIO_f_base64.html# -原始邮件-发件人: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]代表 Jordan C N Chong发送时间: 2001年9月10日 18:04收件人: [EMAIL PROTECTED]主题: RE: Please Help: Crypto library with Visual C++ thousand thanks for your help :D it helps a lot and it works fine now... Now, pls. one more thing, I tried to decode a Base64 encoded string into the string is (for example) :KljL0/zpzt8Y/UtenpqyMPt3JjQTFV5uofM349JXCY1z2i08XKzTW7LlpgnPDLh48Trbq6b/TErJ3UwFvbo8TOf8l4Xnp9yI6RtTWJlVZzJ5+AnY7lKLThSq8fgpVqwnJGVjfIHev6AI9qKHT+8vhN9tTacdU6WkZ6oYiOTb0jE= I am not sure how Do you know where I could some example codes, or perhaps some references on this stuff? very struggling indeed :) Thanks again for everything. Best regards,Jordan Cheun Ngen, ChongINF-4067 Universiteit TwentePostbus 2177500 AE EnschedeThe NetherlandsDistributed and Embedded Systems (DIES)Office Phone: +31 53 4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.: [EMAIL PROTECTED] -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of YONG.YUESent: Monday, September 10, 2001 11:17 AMTo: '[EMAIL PROTECTED]'Subject: ??: Please Help: Crypto library with Visual C++ i think all necessary files for your application is as follows: openssl-0.9.6a/out32dll/ : ssleay32.dll libeay32.dll ssleay32.lib libeay32.rls openssl-0.9.6a/inc32/openssl - this directory contains all head files needed you can do this by two means first : you copy the inc32/openssl to the vc include directory such as D:\Program Files\Microsoft Visual Studio\VC98\INCLUDE\openssl ... vc++ can find this head file automaticly. this one seems much more easy ..haha second ..you make a directory called include parallel to your project diectory.. copy openssl head files to this directory .. then in your project setting: c++ /preprocessor /additonal include directories ... add : ..\include then all ok .. have a good time -ÔʼÓʼþ- ·¢¼þÈË: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]´ú±í Jordan C N Chong ·¢ËÍʱ¼ä: 2001Äê9ÔÂ10ÈÕ 15:43 ÊÕ¼þÈË: openss-user Ö÷Ìâ: Please Help: Crypto library with Visual C++ Dear All, Thousand thanks for your help. I really appreciate that. Your help really means a lot to me... Now, the problem is about the VC setting, I am not sure how to set the directory settings for the project For example, I copied all the files from the directory "crypto" in the "openssl-x-x" to another directory, and then rename it to "openssl". I include the header file of envelope "evp/evp.h". But when I compile the file, the compiler complains it couldn't find the file "openssl/opensslconf.h" (which exists in the "crypto" directory). I hope you could understand my problem. So... I am really confused on how to set up the directory. I don't want to modify all the header files. Is there alternative ways? Please help. Thousand thanks. Wish you all the best. Best regards, Jordan Cheun Ngen, Chong INF-4067 Universiteit Twente Postbus 217 7500 AE Enschede The Netherlands Distributed and Embedded Systems (DIES)
RE: Please Help: BIO!!
Title: ??: Please Help: Crypto library with Visual C++
Hi,
Thanks
for your reply. I have tried, still the memory leak problem happens
:)
and
the whole application crashes
my
code is like this:
BIO *bio, *b64;BIO
*bio_out;char inbuf[128];int
inlen;b64 = BIO_new(BIO_f_base64());bio =
BIO_new_file("content.key", "rb"); bio_out = BIO_new_fp(stdout,
BIO_NOCLOSE);bio = BIO_push(b64, bio);while ((inlen =
BIO_read(bio, inbuf, 128)) 0) {BIO_write(bio_out, inbuf,
inlen);}
BIO_free_all(bio);
what I
wish to do is, read the data from the file content.key
and
then decode the data
and
then convert the decoded data in to a char * (or perhaps to another new
file)
but
here what i do is just print out the decoded data :)
i am
sorry to bother you that much.
pls
forgive
and
pls help if you have the time :D
thousand thanks. Wish you all the
best.
Best
regards,Jordan Cheun Ngen,
ChongINF-4067 Universiteit TwentePostbus 2177500 AE EnschedeThe
NetherlandsDistributed and Embedded Systems
(DIES)Office Phone: +31 53
4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.:
[EMAIL PROTECTED]
-Original Message-From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of ??Sent: Monday, September 10, 2001 1:24
PMTo: '[EMAIL PROTECTED]'Subject: ??: Please
Help: Crypto library with Visual C++
oh
nothing do not be nervous
i think
if you want to read data from a file
first
you must construct a
BIO * mbio = BIO_new_file(filename , "rb") object
then build another BIO* b64 =BIO_new(BIO_f_base64());
then mbio = BIO_push(b64,
mbio);
all ok
...
read data from
while((inlen =
BIO_read(mbio, inbuf, strlen(message))) 0)
{
do as you
wish
}// remember free all bio resource BIO_free_all(bio);
can this solve your problem?
RE: Please Help: BIO!!
Title: ??: Please Help: Crypto library with Visual C++
HI :D
Sorry to bother you again.
I
think I have found the reason :)
it is
because the Project setting is incorrect (thanks for your hints
indeed)
I have
to set the Code Generation (under tag C/C++), the "Use run-time library" to
"Multithreaded DLL" :D
All
the best.
Best
regards,Jordan Cheun Ngen,
ChongINF-4067 Universiteit TwentePostbus 2177500 AE EnschedeThe
NetherlandsDistributed and Embedded Systems
(DIES)Office Phone: +31 53
4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.:
[EMAIL PROTECTED]
-Original Message-From:
[EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of ??Sent: Monday, September 10, 2001 1:48
PMTo: '[EMAIL PROTECTED]'Subject: ??: Please
Help: BIO!!
oh when application crash .. it normally beacause link mfc lib
problem
you may try use mfc in shared dll or mfc instatic
dll
it may ok..
as for memory leak ..
begin ..
OpenSSL_add_all_algorithms();SSL_load_error_strings();
your code...
End:
ERR_free_strings();EVP_cleanup();
see u later...:)
-原始邮件-发件人: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]代表 Jordan C N
Chong发送时间: 2001年9月10日 19:43收件人:
[EMAIL PROTECTED]主题: RE: Please Help:
BIO!!
Hi,
Thanks for your reply. I have tried, still the
memory leak problem happens :)
and the whole application
crashes
my
code is like this:
BIO *bio, *b64;BIO
*bio_out;char inbuf[128];int
inlen;b64 = BIO_new(BIO_f_base64());bio
= BIO_new_file("content.key", "rb"); bio_out = BIO_new_fp(stdout,
BIO_NOCLOSE);bio = BIO_push(b64, bio);while
((inlen = BIO_read(bio, inbuf, 128)) 0)
{BIO_write(bio_out, inbuf,
inlen);}
BIO_free_all(bio);
what I wish to do is, read the data from the file
content.key
and then decode the data
and then convert the decoded data in to a char *
(or perhaps to another new file)
but here what i do is just print out the decoded
data :)
i
am sorry to bother you that much.
pls forgive
and pls help if you have the time
:D
thousand thanks. Wish you all the
best.
Best
regards,Jordan Cheun
Ngen, ChongINF-4067 Universiteit TwentePostbus 2177500 AE
EnschedeThe NetherlandsDistributed and Embedded Systems
(DIES)Office Phone: +31
53 4894655Web site: http://www.cs.utwente.nl/~chongEmail Add.:
[EMAIL PROTECTED]
-Original Message-From:
[EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of
??Sent: Monday, September 10, 2001 1:24 PMTo:
'[EMAIL PROTECTED]'Subject: ??: Please Help: Crypto
library with Visual C++
oh
nothing do not be nervous
i
think if you want to read data from a file
first you must construct a
BIO * mbio =
BIO_new_file(filename , "rb") object
then build another BIO* b64
=BIO_new(BIO_f_base64());
then mbio =
BIO_push(b64, mbio);
all ok
...
read data from
while((inlen =
BIO_read(mbio, inbuf, strlen(message))) 0)
{
do as you
wish
}// remember free all bio resource BIO_free_all(bio);
can this solve your problem?
Use OpenSSL Crypto. How?
Dear all, Please help. I wish to use OpenSSL cryptography for developing an application. However I am not sure how to do that? Is there any reference, example, or perhaps tutorial for using the OpenSSL crypto? Please help. Thanks. Best regards, Jordan Cheun Ngen, Chong Room 4067 Distributed and Embeded Systems Group Centre for Telematics and Information Technology University of Twente Faculty Informatica 7522 NB Enschede The Netherlands Office Phone: +31 53 4894655 Web site: http://www.cs.utwente.nl/~chong Email Add.: [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
RE: Please Help: Crypto
Dear Dirk, Have a look at http://www.iconsinc.com/~agray/ossldev/nt and pick the workspace for the version of OpenSSL you want to use (you'll still need to download the src tarball of OpenSSLvx.y.z). CU, Dirk Thanks for your reply. I don't understand here. All I wish to do is to use the OpenSSL cryptography library... but not OpenSSL.. Although I have already installed the OpenSSL with Apache server on my machine... 1. to do enc/decryption 2. signature generation and verification 3. certificate management However I wish to know whether there is a specific direction on achieving that... like: 1. how to use the provided OpenSSL crypto API? 2. any settings on VC++ 6.0 for that? 3. any library (.LIB) needed? etc. Please help. Thanks. __ OpenSSL Project http://www.openssl.org User Support Mailing List[EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
