<\/P>
\n
<\/P>
\n
#include <stdio.h><\/P>
\n
#include <stdio.h>
#include <string.h>
#include <openssl\/evp.h>
#include <openssl\/objects.h>
#include <openssl\/rand.h><\/P>
\n
<\/P>
\n
int main(int argc, char* argv[])
{
int i;<\/P>
\n
<\/P>
\n
\/\/ salt bufer length = 8
unsigned char salt[8];
\/\/ EVP_CIPHER = Cipher structure
const EVP_CIPHER *cipher = NULL;
\/\/ password pointer. password = “aaaa”
char *password = “aaaa”;
<\/P>
\n
\/\/ \ud0a4\uc640 IV\uac00 \uc800\uc7a5\ub420 \ubcc0\uc218\ub97c \uc815\uc758\ud558\uace0 \uae38\uc774\ub294 OpenSSL\uc5d0\uc11c \uc54c\uc544\uc11c \uc815\ud574\uc900\ub2e4.
unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];<\/P>
\n
<\/P>
\n
int ret = 0;<\/P>
\n
\/\/ PRNG\ub97c \ud1b5\ud574 \ub79c\ub364 \uc218\ub97c \ub9cc\ub4e4\uace0 \uadf8 \uac12\uc744 Salt\uc5d0 \uc800\uc7a5\ud55c\ub2e4. \uae38\uc774\ub294 8
ret = RAND_pseudo_bytes(salt, 8);
<\/P>
\n
\/\/ PRNG\uc5d0\uc11c \uc5d0\ub7ec\uac00 \ubc1c\uc0dd\ud560 \uacbd\uc6b0 \uc5d0\ub7ec \uba54\uc2dc\uc9c0\ub97c \ucd9c\ub825\ud558\uace0 \ud504\ub85c\uadf8\ub7a8\uc744 \uc885\ub8cc\ud55c\ub2e4.
if(ret < 0) {
printf(“Can’t generate random number.n”);
return 0;
}<\/P>
\n
<\/P>
\n
\/\/ \uc554\ud638\ud654 \uad6c\uc870\uccb4\uc758 \uc778\uc2a4\ud134\uc2a4\ub97c \uc0dd\uc131. \uc5ec\uae30\uc11c\ub294 DES\uc758 ECB \ubaa8\ub4dc\uc758 \uc554\ud638\ud654 \uad6c\uc870\uccb4 \uc0dd\uc131
cipher = EVP_des_ecb();<\/P>
\n
<\/P>
\n
\/\/ \ud0a4\uc640 IV\ub97c \uc0dd\uc131\ud568. \uc778\uc790\ub294 \uc554\ud638\ud654 \uad6c\uc870\uccb4, \ub2e4\uc774\uc81c\uc2a4\ud2b8 \uad6c\uc870\uccb4, salt \uac12, \ud328\uc2a4\uc6cc\ub4dc<\/P>
\n
\/\/ \uce74\uc6b4\ud2b8\ub294 \uc0dd\uc131\ub420 \ud0a4\uc640 IV\ub97c \uc800\uc7a5\ud560 \ubcc0\uc218<\/P>
\n
\/\/ \ub2e4\uc774\uc81c\uc2a4\ud2b8 \uad6c\uc870\uccb4\ub294 EVP_md5() \ud568\uc218\ub97c \ud1b5\ud574 \uc0dd\uc131. \uce74\uc6b4\ud2b8\ub294 \ud55c\ubc88
EVP_BytesToKey(cipher, EVP_md5(), salt, (unsigned char *)password, strlen(password), 1, key, iv);<\/P>
\n
\/\/ display salt
for(i = 0; i < sizeof(salt); i++) {
printf(“%02X”, salt[i]);
}<\/P>
\n
\/\/ Display key
if(cipher->key_len > 0) {
for(i = 0; i < cipher->key_len; i++) {
printf(“%02X”, key[i]);
}
}<\/P>
\n
<\/P>
\n
\/\/ Display IV
if(cipher->iv_len > 0) {
for(i = 0; i < cipher->iv_len; i++) {
printf(“%02X”, iv[i]);
}
}<\/P>
\n
<\/P>
\n
return 0;
}
<\/P><\/p>\n","protected":false},"excerpt":{"rendered":"
#include <stdio.h> #include <stdio.h>#include <string.h>#include <openssl\/evp.h>#include <openssl\/objects.h>#include <openssl\/rand.h> int main(int argc, char* argv[]){ int i; \/\/ salt bufer length = 8 unsigned char salt[8]; … Continue reading