[bug fix] encrypt raw data without utf-8 encoding

[UndeadFu]

when I use rsa encrypt with "RAW", the result is wrong when the input contains no-ascii data.
I don't know if it's nesessary to "encodeUtf8(input)", but the bug fixed when i remove it.

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[ThomasNotTom]

It seems to fail the unit tests. Might be worth double checking what the 'expected behaviour' actually is. It may be better to add your implementation as an option, rather than altering the standard implementation?

[UndeadFu]

It seems to fail the unit tests. Might be worth double checking what the 'expected behaviour' actually is. It may be better to add your implementation as an option, rather than altering the standard implementation?

Thank you.I think the failure is caused by some wrong of the unit tests. The input of rsa should be seem as 'raw bytes' but not 'utf-8'. The encoding should be choose by user. Like the rightBottom in this img.