What is the output of crypto::hash

Hi quangtran, you need to represent the binary string as a string of hex digits in your code:

    when RULE_INIT {
        set data "hello, world"
        log local0. "raw data = $data"
        set hash_data [CRYPTO::hash -alg sha256 $data ]
        log local0. "hashing data = $hash_data"
        binary scan $hash_data H* hash_data_hex
        log local0. "hashing data as string = $hash_data_hex"
    }

This results in my log file as:

Feb  2 17:51:16 ltm3.test.local info tmm[115055]: Rule /Common/hash_example <RULE_INIT>: raw data = hello, world
Feb  2 17:51:16 ltm3.test.local info tmm[115055]: Rule /Common/hash_example <RULE_INIT>: hashing data =         Ê~NªnéÇÒaq)HdMߺ|¿¼L6 [
Feb  2 17:51:16 ltm3.test.local info tmm[115055]: Rule /Common/hash_example <RULE_INIT>: hashing data as string = 09ca7e4eaa6e8ae9c7d261167129184883644d07dfba7cbfbc4c8a2e08360d5b

And you can see that that string matches the online generated hash as well: