CRYPT_TDES_IvSet Function

Copyint CRYPT_TDES_IvSet(
    CRYPT_TDES_CTX* tdes, 
    const unsigned char* iv
);

This function changes the initialization vector (IV) of a TDES context, but leaves the key alone.

None.

• BAD_FUNC_ARG - An invalid pointer was passed to the function.

• 0 - An invalid pointer was not passed to the function.

The IV must be 8 bytes long.

CopyCRYPT_TDES_CTX mcDes3;
int            ret;
byte           out1[TDES_SIZE];
byte           out2[TDES_SIZE];

strncpy((char*)key, "1234567890abcdefghijklmn", 24);
strncpy((char*)iv,  "12345678", 8);

ret = CRYPT_TDES_KeySet(&mcDes3, key, iv, CRYPT_TDES_ENCRYPTION);
ret = CRYPT_TDES_IvSet(&mcDes3, iv);
ret = CRYPT_TDES_CBC_Encrypt(&mcDes3, out1, ourData, TDES_SIZE);
ret = CRYPT_TDES_KeySet(&mcDes3, key, iv, CRYPT_TDES_DECRYPTION);
ret = CRYPT_TDES_CBC_Decrypt(&mcDes3, out2, out1, TDES_TEST_SIZE);