| 276 | } |
| 277 | |
| 278 | func (r *EncryptReader) Read(p []byte) (int, error) { |
| 279 | if r.ready > 0 { |
| 280 | n, err := r.buf.Read(p[:min(len(p), r.ready)]) |
| 281 | r.ready -= n |
| 282 | return n, err |
| 283 | } |
| 284 | if r.err != nil { |
| 285 | return 0, r.err |
| 286 | } |
| 287 | if len(p) == 0 { |
| 288 | return 0, nil |
| 289 | } |
| 290 | |
| 291 | if err := r.feedBuffer(); err != nil { |
| 292 | r.err = err |
| 293 | return 0, err |
| 294 | } |
| 295 | |
| 296 | n, err := r.buf.Read(p[:min(len(p), r.ready)]) |
| 297 | r.ready -= n |
| 298 | return n, err |
| 299 | } |
| 300 | |
| 301 | // feedBuffer reads and encrypts the next chunk from r.src and appends it to |
| 302 | // r.buf. It sets r.ready to the number of newly available bytes in r.buf. |