- if #key > blocksize then
- key = hash(key)
- end
-
- for i = 1,#key do
- ipad[i] = xor(ipad[i],key:sub(i,i):byte())
- opad[i] = xor(opad[i],key:sub(i,i):byte())
- end
-
- opad = arraystr(opad)
- ipad = arraystr(ipad)
-
- if hex then
- return hash(opad..hash(ipad..message), true)
- else
- return hash(opad..hash(ipad..message))
- end
-end
-
-function md5(key, message, hex)
- return hmac(key, message, hashes.md5, 64, hex)
-end
-
-function sha1(key, message, hex)
- return hmac(key, message, hashes.sha1, 64, hex)
-end
-
-function sha256(key, message, hex)
- return hmac(key, message, hashes.sha256, 64, hex)
-end