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pkcs7: update parameter names and documentation

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Signed-off-by: Sumner Evans <sumner.evans@automattic.com>
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Sumner Evans 2024-05-20 10:57:51 -06:00
commit dd1dfb9bab
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1 changed files with 12 additions and 12 deletions
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24
crypto/pkcs7/pkcs7.go
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@ -8,23 +8,23 @@ package pkcs7
import "bytes"
// Pad implements PKCS#7 padding as defined in [RFC2315]. It pads the plaintext
// to the given blockSize in the range [1, 255]. This is normally used in
// AES-CBC encryption.
// Pad implements PKCS#7 padding as defined in [RFC2315]. It pads the data to
// the given blockSize in the range [1, 255]. This is normally used in AES-CBC
// encryption.
//
// [RFC2315]: https://www.ietf.org/rfc/rfc2315.txt
func Pad(plaintext []byte, blockSize int) []byte {
padding := blockSize - len(plaintext)%blockSize
return append(plaintext, bytes.Repeat([]byte{byte(padding)}, padding)...)
func Pad(data []byte, blockSize int) []byte {
padding := blockSize - len(data)%blockSize
return append(data, bytes.Repeat([]byte{byte(padding)}, padding)...)
}
// Unpad implements PKCS#7 unpadding as defined in [RFC2315]. It unpads the
// plaintext by reading the padding amount from the last byte of the plaintext.
// This is normally used in AES-CBC decryption.
// data by reading the padding amount from the last byte of the data. This is
// normally used in AES-CBC decryption.
//
// [RFC2315]: https://www.ietf.org/rfc/rfc2315.txt
func Unpad(plaintext []byte) []byte {
length := len(plaintext)
unpadding := int(plaintext[length-1])
return plaintext[:length-unpadding]
func Unpad(data []byte) []byte {
length := len(data)
unpadding := int(data[length-1])
return data[:length-unpadding]
}