// ENCRYPTING

1.	"openssl des-ecb -S a"
	prompts to enter password, generate key with given pass and salt,
	prepend salt header.

2.	"openssl des-ecb -pass pass:asd"
	generate salt and key, prepend salt header.

3.	"openssl des-ecb -S a -pass:asd"
	generate key from givent salt and pass, prepend header.

4.	"openssl des-ecb -S a -pass:asd -K 1"
	encrypt with GIVEN key, prepend GIVEN salt headaer.

5.	"openssl des-ecb -K 1"
	encrypt with given key, doesn't generate and prepend salt.

6.	"openssl des-ecb -S 0 -pass pass:asd -P -pbkdf2"
	generate key using PKCS5_PBKDF2_HMAC with 10000 iteration,
	8 byte salt, 3 byte key, sha256 hash function, prepend salt header.

// DECRYPTING

7.	"echo -n Salted__ | openssl des-ecb -d"
	prompts to enter password, generate key but fails to decode.

8.	"echo -n Salted__aaaaaaaa | openssl des-ecb -d"
	prompts to enter password, generate key but fails to validate padding.

9.	openssl doesn't expect "Salted__" header only when -K or -S flag supplied
	(or both simultaneously, in this case salt is discarded),
	in any other case salt should be readed from message.