pkcs7pad

Documentation

Overview

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

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

Index

• func Decode(buf []byte) ([]byte, error)
• func Encode(buf []byte, size int) []byte

Functions

func Decode

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

Decode 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.

func Encode

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

Encode 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).