diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c b/Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c index 1399e07667..c50ba84ea8 100644 --- a/Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c +++ b/Utilities/cmlibarchive/libarchive/archive_read_support_format_zip.c @@ -181,6 +181,14 @@ struct zip { char init_decryption; /* Decryption buffer. */ + /* + * The decrypted data starts at decrypted_ptr and + * extends for decrypted_bytes_remaining. Decryption + * adds new data to the end of this block, data is returned + * to clients from the beginning. When the block hits the + * end of decrypted_buffer, it has to be shuffled back to + * the beginning of the buffer. + */ unsigned char *decrypted_buffer; unsigned char *decrypted_ptr; size_t decrypted_buffer_size; @@ -1293,8 +1301,9 @@ zip_read_data_deflate(struct archive_read *a, const void **buff, if (zip->tctx_valid || zip->cctx_valid) { if (zip->decrypted_bytes_remaining < (size_t)bytes_avail) { - size_t buff_remaining = zip->decrypted_buffer_size - - (zip->decrypted_ptr - zip->decrypted_buffer); + size_t buff_remaining = + (zip->decrypted_buffer + zip->decrypted_buffer_size) + - (zip->decrypted_ptr + zip->decrypted_bytes_remaining); if (buff_remaining > (size_t)bytes_avail) buff_remaining = (size_t)bytes_avail; |