diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_read_support_format_7zip.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_read_support_format_7zip.c | 37 |
1 files changed, 30 insertions, 7 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_read_support_format_7zip.c b/Utilities/cmlibarchive/libarchive/archive_read_support_format_7zip.c index 7d7e70243f..722edf1dbf 100644 --- a/Utilities/cmlibarchive/libarchive/archive_read_support_format_7zip.c +++ b/Utilities/cmlibarchive/libarchive/archive_read_support_format_7zip.c @@ -287,6 +287,7 @@ struct _7zip { const unsigned char *next_in; int64_t avail_in; int64_t total_in; + int64_t stream_in; unsigned char *next_out; int64_t avail_out; int64_t total_out; @@ -775,7 +776,7 @@ archive_read_format_7zip_read_header(struct archive_read *a, } /* Set up a more descriptive format name. */ - sprintf(zip->format_name, "7-Zip"); + snprintf(zip->format_name, sizeof(zip->format_name), "7-Zip"); a->archive.archive_format_name = zip->format_name; return (ret); @@ -986,15 +987,30 @@ ppmd_read(void *p) struct _7zip *zip = (struct _7zip *)(a->format->data); Byte b; - if (zip->ppstream.avail_in == 0) { - archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT, - "Truncated RAR file data"); - zip->ppstream.overconsumed = 1; - return (0); + if (zip->ppstream.avail_in <= 0) { + /* + * Ppmd7_DecodeSymbol might require reading multiple bytes + * and we are on boundary; + * last resort to read using __archive_read_ahead. + */ + ssize_t bytes_avail = 0; + const uint8_t* data = __archive_read_ahead(a, + zip->ppstream.stream_in+1, &bytes_avail); + if(bytes_avail < zip->ppstream.stream_in+1) { + archive_set_error(&a->archive, + ARCHIVE_ERRNO_FILE_FORMAT, + "Truncated 7z file data"); + zip->ppstream.overconsumed = 1; + return (0); + } + zip->ppstream.next_in++; + b = data[zip->ppstream.stream_in]; + } else { + b = *zip->ppstream.next_in++; } - b = *zip->ppstream.next_in++; zip->ppstream.avail_in--; zip->ppstream.total_in++; + zip->ppstream.stream_in++; return (b); } @@ -1485,6 +1501,7 @@ decompress(struct archive_read *a, struct _7zip *zip, } zip->ppstream.next_in = t_next_in; zip->ppstream.avail_in = t_avail_in; + zip->ppstream.stream_in = 0; zip->ppstream.next_out = t_next_out; zip->ppstream.avail_out = t_avail_out; if (zip->ppmd7_stat == 0) { @@ -2840,8 +2857,10 @@ slurp_central_directory(struct archive_read *a, struct _7zip *zip, /* CRC check. */ if (crc32(0, (const unsigned char *)p + 12, 20) != archive_le32dec(p + 8)) { +#ifdef DONT_FAIL_ON_CRC_ERROR archive_set_error(&a->archive, -1, "Header CRC error"); return (ARCHIVE_FATAL); +#endif } next_header_offset = archive_le64dec(p + 12); @@ -2891,8 +2910,10 @@ slurp_central_directory(struct archive_read *a, struct _7zip *zip, /* Check the EncodedHeader CRC.*/ if (r == 0 && zip->header_crc32 != next_header_crc) { archive_set_error(&a->archive, -1, +#ifndef DONT_FAIL_ON_CRC_ERROR "Damaged 7-Zip archive"); r = -1; +#endif } if (r == 0) { if (zip->si.ci.folders[0].digest_defined) @@ -2943,9 +2964,11 @@ slurp_central_directory(struct archive_read *a, struct _7zip *zip, /* Check the Header CRC.*/ if (check_header_crc && zip->header_crc32 != next_header_crc) { +#ifndef DONT_FAIL_ON_CRC_ERROR archive_set_error(&a->archive, -1, "Malformed 7-Zip archive"); return (ARCHIVE_FATAL); +#endif } break; default: |