Encrypted output is different in openssl command and openssl C Program - c

Question

I wrote a simple openssl program to perform 'AES-128-CBC' encryption.
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <openssl/conf.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#define KEY_SIZE 16
#define IV_SIZE 16
void handleErrors(void)
{
ERR_print_errors_fp(stderr);
abort();
}
void hexdump(const void* data, size_t size) {
char ascii[17];
size_t i, j;
ascii[16] = '\0';
for (i = 0; i < size; ++i) {
printf("%02X ", ((unsigned char*)data)[i]);
if (((unsigned char*)data)[i] >= ' ' && ((unsigned char*)data)[i] <= '~') {
ascii[i % 16] = ((unsigned char*)data)[i];
} else {
ascii[i % 16] = '.';
}
if ((i+1) % 8 == 0 || i+1 == size) {
printf(" ");
if ((i+1) % 16 == 0) {
printf("| %s \n", ascii);
} else if (i+1 == size) {
ascii[(i+1) % 16] = '\0';
if ((i+1) % 16 <= 8) {
printf(" ");
}
for (j = (i+1) % 16; j < 16; ++j) {
printf(" ");
}
printf("| %s \n", ascii);
}
}
}
}
int encrypt_file(void)
{
EVP_CIPHER_CTX *ctx;
char plain_text[12] = "Hello World";
size_t plaintext_len = 12;
unsigned char *ciphertext = NULL;
int ciphertext_maxlen = plaintext_len + EVP_CIPHER_block_size(EVP_aes_128_cbc())*2 - 1;
int len = 0, ciphertext_len = 0;
ciphertext = (unsigned char *)malloc(ciphertext_maxlen * sizeof(unsigned char));
unsigned char key[KEY_SIZE]= {0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11};
unsigned char iv[IV_SIZE] = {0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22};
hexdump(key, 16);
hexdump(iv, 16);
/* Create and initialise the context */
if(!(ctx = EVP_CIPHER_CTX_new()))
handleErrors();
if (1 != EVP_EncryptInit_ex(ctx, EVP_aes_128_cbc(), NULL, key, iv))
handleErrors();
if (1 != EVP_EncryptUpdate(ctx, ciphertext, &len, plain_text, plaintext_len))
handleErrors();
ciphertext_len = len;
if( EVP_EncryptFinal_ex(ctx, ciphertext + len, &len) != 1 )
handleErrors();
ciphertext_len += len;
printf("ciphertext len:%d\n", ciphertext_len);
EVP_CIPHER_CTX_free(ctx);
hexdump(ciphertext, ciphertext_len);
free(ciphertext);
return 0;
}
int main(int argc, char *argv[])
{
encrypt_file();
return 0;
}
When i am running this program it's generating cipher text.
11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 11 | ................
22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 22 | """"""""""""""""
ciphertext len:16
4F 55 95 1F D9 A6 34 F1 2F 90 06 2B 82 F8 C2 19 | OU....4./..+....
I am trying to verify whether my C code is working fine or not by passing the same parameters to openssl commands
jamal#jamal-VirtualBox:~$ echo "Hello World" > plaintext.txt
jamal#jamal-VirtualBox:~$ cat plaintext.txt
Hello World
jamal#jamal-VirtualBox:~$ openssl enc -aes-128-cbc -in plaintext.txt -K '11111111111111111111111111111111' -iv '22222222222222222222222222222222' -out openssl_enc.txt -p
salt=F3753875307F0000
key=11111111111111111111111111111111
iv =22222222222222222222222222222222
jamal#jamal-VirtualBox:~$ hexdump openssl_enc.txt
0000000 ea60 4e8e a289 ea50 ee19 0edc 81ea 557d
0000010
Why is the cipher bytes generated by C code not same as the one generated by openssl command. Am i missing anything in Code?