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Simple yes or no question, and I'm 90% sure that it is no... but I'm not sure.
Can a Base64 string contain tabs?
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The base 64 digits in ascending order from zero are the uppercase characters 'A' to 'Z', lowercase characters 'a' to 'z', numerals '0' to '9', and the symbols '+' and '/'. % is not allowed in base64 encoding. Save this answer.
Base64 is a binary-to-text encoding scheme. It's represented as printable ASCII characters where each Base64 character contains 6 bits of binary information. It's very useful for storing image/audio information in Strings of information.
Because line breaks are considered white-space characters in a base-64 encoding, they are ignored when converting a base-64 encoded string back to a byte array.
Base64 only contains A–Z , a–z , 0–9 , + , / and = . So the list of characters not to be used is: all possible characters minus the ones mentioned above. For special purposes . and _ are possible, too.
It depends on what you're asking. If you are asking whether or not tabs can be base-64 encoded, then the answer is "yes" since they can be treated the same as any other ASCII character.
However, if you are asking whether or not base-64 output can contain tabs, then the answer is no. The following link is for an article detailing base-64, including which characters are considered valid:
http://en.wikipedia.org/wiki/Base64
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The short answer is no - but Base64 cannot contain carriage returns either.
That is why, if you have multiple lines of Base64, you strip out any carriage returns, line feeds, and anything else that is not in the Base64 alphabet
That includes tabs.
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