diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c | 79 |
1 files changed, 70 insertions, 9 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c b/Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c index dc1563d..4c56834 100644 --- a/Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c +++ b/Utilities/cmlibarchive/libarchive/archive_read_support_format_rar.c @@ -304,8 +304,15 @@ struct rar ssize_t avail_in; const unsigned char *next_in; } br; + + /* + * Custom field to denote that this archive contains encrypted entries + */ + int has_encrypted_entries; }; +static int archive_read_support_format_rar_capabilities(struct archive_read *); +static int archive_read_format_rar_has_encrypted_entries(struct archive_read *); static int archive_read_format_rar_bid(struct archive_read *, int); static int archive_read_format_rar_options(struct archive_read *, const char *, const char *); @@ -646,6 +653,12 @@ archive_read_support_format_rar(struct archive *_a) } memset(rar, 0, sizeof(*rar)); + /* + * Until enough data has been read, we cannot tell about + * any encrypted entries yet. + */ + rar->has_encrypted_entries = ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW; + r = __archive_read_register_format(a, rar, "rar", @@ -655,7 +668,9 @@ archive_read_support_format_rar(struct archive *_a) archive_read_format_rar_read_data, archive_read_format_rar_read_data_skip, archive_read_format_rar_seek_data, - archive_read_format_rar_cleanup); + archive_read_format_rar_cleanup, + archive_read_support_format_rar_capabilities, + archive_read_format_rar_has_encrypted_entries); if (r != ARCHIVE_OK) free(rar); @@ -663,6 +678,27 @@ archive_read_support_format_rar(struct archive *_a) } static int +archive_read_support_format_rar_capabilities(struct archive_read * a) +{ + (void)a; /* UNUSED */ + return (ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_DATA + | ARCHIVE_READ_FORMAT_CAPS_ENCRYPT_METADATA); +} + +static int +archive_read_format_rar_has_encrypted_entries(struct archive_read *_a) +{ + if (_a && _a->format) { + struct rar * rar = (struct rar *)_a->format->data; + if (rar) { + return rar->has_encrypted_entries; + } + } + return ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW; +} + + +static int archive_read_format_rar_bid(struct archive_read *a, int best_bid) { const char *p; @@ -755,7 +791,7 @@ archive_read_format_rar_options(struct archive_read *a, { struct rar *rar; int ret = ARCHIVE_FAILED; - + rar = (struct rar *)(a->format->data); if (strcmp(key, "hdrcharset") == 0) { if (val == NULL || val[0] == 0) @@ -797,6 +833,17 @@ archive_read_format_rar_read_header(struct archive_read *a, rar = (struct rar *)(a->format->data); + /* + * It should be sufficient to call archive_read_next_header() for + * a reader to determine if an entry is encrypted or not. If the + * encryption of an entry is only detectable when calling + * archive_read_data(), so be it. We'll do the same check there + * as well. + */ + if (rar->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) { + rar->has_encrypted_entries = 0; + } + /* RAR files can be generated without EOF headers, so return ARCHIVE_EOF if * this fails. */ @@ -857,9 +904,14 @@ archive_read_format_rar_read_header(struct archive_read *a, sizeof(rar->reserved2)); } + /* Main header is password encrytped, so we cannot read any + file names or any other info about files from the header. */ if (rar->main_flags & MHD_PASSWORD) { - archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, + archive_entry_set_is_metadata_encrypted(entry, 1); + archive_entry_set_is_data_encrypted(entry, 1); + rar->has_encrypted_entries = 1; + archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "RAR encryption support unavailable."); return (ARCHIVE_FATAL); } @@ -938,6 +990,10 @@ archive_read_format_rar_read_data(struct archive_read *a, const void **buff, struct rar *rar = (struct rar *)(a->format->data); int ret; + if (rar->has_encrypted_entries == ARCHIVE_READ_FORMAT_ENCRYPTION_DONT_KNOW) { + rar->has_encrypted_entries = 0; + } + if (rar->bytes_unconsumed > 0) { /* Consume as much as the decompressor actually used. */ __archive_read_consume(a, rar->bytes_unconsumed); @@ -957,7 +1013,7 @@ archive_read_format_rar_read_data(struct archive_read *a, const void **buff, { case COMPRESS_METHOD_STORE: ret = read_data_stored(a, buff, size, offset); - break; + break; case COMPRESS_METHOD_FASTEST: case COMPRESS_METHOD_FAST: @@ -967,13 +1023,13 @@ archive_read_format_rar_read_data(struct archive_read *a, const void **buff, ret = read_data_compressed(a, buff, size, offset); if (ret != ARCHIVE_OK && ret != ARCHIVE_WARN) __archive_ppmd7_functions.Ppmd7_Free(&rar->ppmd7_context, &g_szalloc); - break; + break; default: archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "Unsupported compression method for RAR file."); ret = ARCHIVE_FATAL; - break; + break; } return (ret); } @@ -1290,9 +1346,14 @@ read_header(struct archive_read *a, struct archive_entry *entry, if (rar->file_flags & FHD_PASSWORD) { + archive_entry_set_is_data_encrypted(entry, 1); + rar->has_encrypted_entries = 1; archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, "RAR encryption support unavailable."); - return (ARCHIVE_FATAL); + /* Since it is only the data part itself that is encrypted we can at least + extract information about the currently processed entry and don't need + to return ARCHIVE_FATAL here. */ + /*return (ARCHIVE_FATAL);*/ } if (rar->file_flags & FHD_LARGE) @@ -1377,7 +1438,7 @@ read_header(struct archive_read *a, struct archive_entry *entry, flagbyte = *(p + offset++); flagbits = 8; } - + flagbits -= 2; switch((flagbyte >> flagbits) & 3) { @@ -2611,7 +2672,7 @@ expand(struct archive_read *a, int64_t end) if ((symbol = read_next_symbol(a, &rar->maincode)) < 0) return (ARCHIVE_FATAL); rar->output_last_match = 0; - + if (symbol < 256) { lzss_emit_literal(rar, symbol); |