LESSON 172 OF 414 · PROJECTS: EVERYDAY PROGRAMS

Password Strength V5 - Common Password Dictionary in Kotlin

Practice

Use a dictionary (or set) as a fast lookup table to reject well-known weak passwords.

You start with:

val common = setOf("password", "123456", "qwerty", "letmein")
val password = "qwerty"

Build:

Password: qwerty
Common: True
Weak: reject

Rules:

Print "Password: " followed by the password.
Look the password up in the set common and store the result as a boolean.
Print "Common: " followed by the boolean. Write it as True or False with a capital letter, exactly as in the example (your language's own boolean prints differently, so choose the text yourself).
If it is common, print "Weak: reject"; otherwise print "Strong: accept".

Try other passwords: with Tr0ub4dor the output is

Password: Tr0ub4dor
Common: False
Strong: accept

Use a Set<String> built with setOf(...) and call .contains(password).

val common = setOf("password", "123456", "qwerty", "letmein")
val password = "qwerty"

println("Password: " + password)
val isCommon = common.contains(password)
println("Common: " + (if (isCommon) "True" else "False"))
if (isCommon) {
    println("Weak: reject")
} else {
    println("Strong: accept")
}

STEP 1 OF 5

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Password Strength V5 - Common Password Dictionary in Kotlin

Password Strength V5 in Kotlin