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43 lines
933 B
Go
43 lines
933 B
Go
package s3crypto
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import (
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"io"
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)
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// Cipher interface allows for either encryption and decryption of an object
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type Cipher interface {
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Encrypter
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Decrypter
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}
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// Encrypter interface with only the encrypt method
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type Encrypter interface {
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Encrypt(io.Reader) io.Reader
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}
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// Decrypter interface with only the decrypt method
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type Decrypter interface {
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Decrypt(io.Reader) io.Reader
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}
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// CryptoReadCloser handles closing of the body and allowing reads from the decrypted
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// content.
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type CryptoReadCloser struct {
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Body io.ReadCloser
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Decrypter io.Reader
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isClosed bool
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}
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// Close lets the CryptoReadCloser satisfy io.ReadCloser interface
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func (rc *CryptoReadCloser) Close() error {
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rc.isClosed = true
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return rc.Body.Close()
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}
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// Read lets the CryptoReadCloser satisfy io.ReadCloser interface
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func (rc *CryptoReadCloser) Read(b []byte) (int, error) {
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if rc.isClosed {
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return 0, io.EOF
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}
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return rc.Decrypter.Read(b)
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}
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