Comments for Your Friendly Neighbourhood Infidel

Comment on Openssl AES encryption example by Guenther

Guenther — Thu, 26 Aug 2010 03:01:55 +0000

Minou, a simple #include will do the trick too.

Comment on Openssl AES encryption example by minou

minou — Thu, 29 Jul 2010 14:32:17 +0000

I got the same error as George (AES_BLOCK_SIZE) undeclared. It is really weird cuz aes is actually implemented in most openssl’s. The problem seems to be just the constant itself. So i just added at the beginning :
#define AES_BLOCK_SIZE 256
and it worked as a charm.

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ircblows — Sun, 20 Jun 2010 05:04:15 +0000

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Comment on Ranked Bollywood Actors List by Kranthi

Kranthi — Fri, 04 Jun 2010 10:02:22 +0000

After Rock bottom, there is 50 feet of crap and after that there is Tushhaaaaaaaaar KKKapoor.

Comment on Openssl AES encryption example by John

John — Fri, 09 Apr 2010 22:50:42 +0000

Minor point…
This line of code in aes_init():
printf(”Key size is %d bits – should be 256 bits\n”, i);
should be:
printf(”Key size is %d bits – should be 256 bits\n”, i*8);

Comment on Actionscript 3 port of openssl’s AES cipher by Saju

Saju — Mon, 29 Mar 2010 09:25:26 +0000

http://saju.net.in/code/aes_as3/example.as – shows how to uses these classes. To talk to Java you will have to setup a method to communicate between your AS3 program & your Java program. You can usually do this using sockets or files

Comment on Actionscript 3 port of openssl’s AES cipher by Corneliu Bogdan

Corneliu Bogdan — Sun, 28 Mar 2010 20:11:57 +0000

Hello,

I’m also interested in this. Could you please send me too an example? I would like to use this between AS3 and Java.

Thank you,
Corneliu

Comment on Openssl AES encryption example by Saju

Saju — Tue, 16 Mar 2010 03:59:33 +0000

EVP_EncryptUpdate() modifies c_len to the actual amount of data written. TEVP_EncryptUpdate() cannot write more than *len + AES_BLOCK_SIZE. EVP_EncryptFinal_ex() writes the final bytes if any are needed, i.e if EVP_EncryptUpdate() has written out the entire cipher text EVP_EncryptFinal() will not write any bytes. i.e c_len + f_len <= *len + AES_BLOCK_SIZE is guaranteed by the apis.

Comment on Openssl AES encryption example by Timeon

Timeon — Mon, 15 Mar 2010 22:12:16 +0000

Saju, First, thanks for a great post. Second a question. I’m a little confused by the memory allocation in aes_encrypt.

c_len is allocated for ciphertext, however, appereantly c_len + f_len bytes are written into it.

Comment on Openssl AES encryption example by Ge0rge

Ge0rge — Thu, 11 Mar 2010 15:40:59 +0000

Thanks for the great work Saju! You helped me really much:)
I have some problems with compilling,i am getting these errors:

newmain.c:62: error: ‘AES_BLOCK_SIZE’ undeclared (first use in this function)
newmain.c:62: error: (Each undeclared identifier is reported only once
newmain.c:62: error: for each function it appears in.)

As you can see all are at the line :
int c_len = *len + AES_BLOCK_SIZE, f_len = 0;

I have tried the printf command you told to george but it didn’t work:(
Also i have checked the openssl/opensslconf.h and i can’t find anything about OPENSSL_NO_AES.I have find it at openssl/evp.h like this:
#ifndef OPENSSL_NO_AES
const EVP_CIPHER *EVP_aes_128_ecb(void);
const EVP_CIPHER *EVP_aes_128_cbc(void);
const EVP_CIPHER *EVP_aes_128_cfb1(void);
const EVP_CIPHER *EVP_aes_128_cfb8(void);
const EVP_CIPHER *EVP_aes_128_cfb128(void);
# define EVP_aes_128_cfb EVP_aes_128_cfb128
const EVP_CIPHER *EVP_aes_128_ofb(void);

Thanks for the help anyway :-)