Base64#strict_decode64

strict_decode64(str)

# File tmp/rubies/ruby-3.3.0/lib/base64.rb, line 297
def strict_decode64(str)
  str.unpack1("m0")
end

Returns a string containing the decoding of an RFC-2045-compliant Base64-encoded string str:

Example

s = "VGhpcyBpcyBsaW5lIDEKVGhpcyBpcyBsaW5lIDIK"
Base64.strict_decode64(s) # => "This is line 1\nThis is line 2\n"

Non-Base64 characters in str not allowed; see Encoding Character Set above: these include newline characters and characters - and /:

Example

Base64.strict_decode64("\n") # Raises ArgumentError
Base64.strict_decode64('-')  # Raises ArgumentError
Base64.strict_decode64('_')  # Raises ArgumentError

Padding in str, if present, must be correct:

Example

Base64.strict_decode64("MDEyMzQ1Njc")   # Raises ArgumentError
Base64.strict_decode64("MDEyMzQ1Njc=")  # => "01234567"
Base64.strict_decode64("MDEyMzQ1Njc==") # Raises ArgumentError

See also #encode64 #strict_encode64 #decode64 #urlsafe_decode64 also in 3.2 · 3.1 · 3.0

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