func (e *Block) DecryptCBC(input, iv []byte) ([]byte, error) {
length := len(input)
plaintext := make([]byte, length)
if len(iv) != e.BlockSize {
return plaintext, IVSizeError
}
// Loop over each block
for a, b := 0, e.BlockSize; b <= length; a, b = a+e.BlockSize, b+e.BlockSize {
plainslice := make([]byte, e.BlockSize)
plainslice, err := e.DecryptCBCBlock(input[a:b], iv)
if err != nil {
return plaintext, err
}
copy(plaintext[a:b], plainslice)
iv = input[a:b]
}
if conversion.DetectPKCS(plaintext) {
plaintext = conversion.UnPadPKCS(plaintext)
}
return plaintext, nil
}
func (e *Block) DecryptECB(input []byte) ([]byte, error) {
length := len(input)
plaintext := make([]byte, length)
// Loop over each block
for a, b := 0, e.BlockSize; b <= length; a, b = a+e.BlockSize, b+e.BlockSize {
plainslice := plaintext[a:b]
plainslice, err := e.DecryptECBBlock(input[a:b])
if err != nil {
return plaintext, err
}
copy(plaintext[a:b], plainslice)
}
if conversion.DetectPKCS(plaintext) {
plaintext = conversion.UnPadPKCS(plaintext)
}
return plaintext, nil
}