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minizip: Check length of comment, filename, and extra field, in zipOpenNewFileInZip4_64 #843

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minizip: Check length of comment, filename, and extra field, in zipOpenNewFileInZip4_64 #843

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11 changes: 11 additions & 0 deletions contrib/minizip/zip.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1043,6 +1043,17 @@ extern int ZEXPORT zipOpenNewFileInZip4_64(zipFile file, const char* filename, c
return ZIP_PARAMERROR;
#endif

// The filename and comment length must fit in 16 bits.
if ((filename!=NULL) && (strlen(filename)>0xffff))
return ZIP_PARAMERROR;
if ((comment!=NULL) && (strlen(comment)>0xffff))
return ZIP_PARAMERROR;
// The extra field length must fit in 16 bits. If the member also requires
// a Zip64 extra block, that will also need to fit within that 16-bit
// length, but that will be checked for later.
if ((size_extrafield_local>0xffff) || (size_extrafield_global>0xffff))
return ZIP_PARAMERROR;

zi = (zip64_internal*)file;

if (zi->in_opened_file_inzip == 1)
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