69 lines
1.0 KiB
Go
69 lines
1.0 KiB
Go
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package secretstore
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import (
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"crypto/aes"
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"crypto/cipher"
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"io"
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)
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func (s *Store) NewReader(reader io.Reader) (r io.Reader, err error) {
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iv := [aes.BlockSize]byte{}
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err = readFull(reader, iv[:])
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if err != nil {
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return
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}
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r = storeReader{reader, s.NewDecrypter(iv)}
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return
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}
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type storeReader struct {
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reader io.Reader
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decrypter cipher.Stream
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}
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func (r storeReader) Read(ba []byte) (n int, err error) {
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n, err = r.reader.Read(ba)
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if n > 0 {
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r.decrypter.XORKeyStream(ba[:n], ba[:n])
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}
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return
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}
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func (s *Store) NewWriter(writer io.Writer) (r io.Writer, err error) {
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iv := [aes.BlockSize]byte{}
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if err = randRead(iv[:]); err != nil {
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return
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}
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_, err = writer.Write(iv[:])
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if err != nil {
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return
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}
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r = storeWriter{writer, s.NewEncrypter(iv)}
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return
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}
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type storeWriter struct {
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writer io.Writer
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encrypter cipher.Stream
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}
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func (r storeWriter) Write(ba []byte) (n int, err error) {
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if len(ba) == 0 {
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return
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}
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encBA := make([]byte, len(ba))
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r.encrypter.XORKeyStream(encBA, ba)
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n, err = r.writer.Write(encBA)
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return
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}
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