Dev EVP Unterstand

[Razack]

I'm not sure, that this code is correct?

 

thx for help

 

code:

#include <stdio.h>

#include <openssl/evp.h>

 

int main(int argc, char *argv[])

{

                unsigned char text[]="Hello World!";

                char key[]="password";

                char iv[]="12345678";

 

                unsigned char outbuf[1024];

                int outlen, tmplen, i;

 

                EVP_CIPHER_CTX ctx;

                EVP_CIPHER_CTX_init(&ctx);

 

                EVP_EncryptInit_ex(&ctx,EVP_aes_256_cbc(),NULL,key,iv);

                EVP_EncryptUpdate(&ctx,outbuf,&outlen,text,strlen(text));

                EVP_EncryptFinal_ex(&ctx,outbuf+outlen,&tmplen);

                               outlen+=tmplen;

                EVP_CIPHER_CTX_cleanup(&ctx);

 

                printf("%s\n",outbuf);

 

                EVP_DecryptInit_ex(&ctx,EVP_aes_256_cbc(),NULL,key,iv);

                EVP_DecryptUpdate(&ctx,outbuf,&outlen,text,strlen(text));

                EVP_DecryptFinal_ex(&ctx,outbuf+outlen,&tmplen);

                               outlen+=tmplen;

                EVP_CIPHER_CTX_cleanup(&ctx);

                

                printf("%s\n",text);

}