我正在使用OpenSSL的 C-API,但我对如何在OpenSSL中使用IV ( 初始化向量 )感到困惑。
说,我有
plaintext.txt file = "This is a top secret." Key = "example#########" IV = 010203040506070809000a0b0c0d0e0f
当我使用OpenSSL AES-128-CBC加密时,我应该得到:
e5accdb667e8e569b1b34f423508c15422631198454e104ceb658f5918800c22
当我尝试这个时(密钥转换为hex),这是真的:
openssl enc -aes-128-cbc -e -in plaintext.txt -out ciphertext.bin -K 6578616d706c65232323232323232323 -iv 010203040506070809000a0b0c0d0e0f
我明白了:
xxd -p ciphertext.bin e5accdb667e8e569b1b34f423508c15422631198454e104ceb658f5918800c22
但是我用C得到了不同的密文
char plaintext[] = "This is a top secret."; unsigned char iv[16] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x00, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F }; unsigned char ciphertext[] = { 0xe5, 0xac, 0xcd, 0xb6, 0x67, 0xe8, 0xe5, 0x69, 0xb1, 0xb3, 0x4f, 0x42, 0x35, 0x08, 0xc1, 0x54, 0x22, 0x63, 0x11, 0x98, 0x45, 0x4e, 0x10, 0x4c, 0xeb, 0x65, 0x8f, 0x59, 0x18, 0x80, 0x0c, 0x22 };
key(example)位于words.txt
文件中。
我的加密过程:
while(fgets(words, 16, wordsfile)) { //for getting key and padding index = strlen(words) - 1; //key "example" is the last word in words.txt while(index < 16) { words[index] = 0x20; index++; } words[index] = '