pkcs7pad

README

Package pkcs7pad implements PKCS#7 padding, as defined in RFC 5652.

Godoc.

Documentation

Overview

Package pkcs7pad implements PKCS#7 padding, as defined in RFC 5652.

https://tools.ietf.org/html/rfc5652#section-6.3

Index

• func Pad(buf []byte, size int) []byte
• func Unpad(buf []byte) ([]byte, error)

Functions

func Pad

func Pad(buf []byte, size int) []byte

Pad appends PKCS#7 padding to the given buffer such that the resulting slice of bytes has a length divisible by the given size. If you are using this function to pad a plaintext before encrypting it with a block cipher, the size should be equal to the block size of the cipher (e.g., aes.BlockSize).

func Unpad

func Unpad(buf []byte) ([]byte, error)

Unpad returns a subslice of the input buffer with trailing PKCS#7 padding removed. It checks the correctness of the padding bytes in constant time, and returns an error if the padding bytes are malformed.