19 lines
511 B
Go
19 lines
511 B
Go
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package crypto
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// Pkcs5pad is a padding function that uses the PKCS5 method.
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func Pkcs5pad(data []byte, blocksize int) []byte {
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pad := blocksize - len(data)%blocksize
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b := make([]byte, pad, pad)
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for i := 0; i < pad; i++ {
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b[i] = uint8(pad)
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}
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return append(data, b...)
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}
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// Pkcs5unpad is a stripping function that reverts the PKCS5 method.
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func Pkcs5unpad(data []byte) []byte {
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pad := int(data[len(data)-1])
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// FIXME: check that the padding bytes are all what we expect
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return data[:len(data)-pad]
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}
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