diff options
| author | Jun Fang <jun_fang@foxitsoftware.com> | 2015-04-09 09:59:41 -0700 |
|---|---|---|
| committer | Jun Fang <jun_fang@foxitsoftware.com> | 2015-04-09 09:59:41 -0700 |
| commit | 1ed2ceb70476b135a3dedbb45549d6b3bc6ecdea (patch) | |
| tree | 315f30c198dc74541008a08a800abf0a1d46d8a1 | |
| parent | cbcc7305fd8d0d0fbed316ed092642de10c3b207 (diff) | |
| download | pdfium-1ed2ceb70476b135a3dedbb45549d6b3bc6ecdea.tar.xz | |
Fix a global buffer overflow in GCPDF_CIDFont::_CharCodeFromUnicodechromium/2368chromium/2367chromium/2366chromium/2365chromium/2364
There is not a code page (CP) used for converting unicode to mutli-bytes
if the coding scheme is CID coding. Only return 0 if CID can't be retrieved.
The difference on Windows and other platforms should be the function used
for converting rather than others.
BUG=466790
R=tsepez@chromium.org
Review URL: https://codereview.chromium.org/1074653002
| -rw-r--r-- | core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp b/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp index cbfa19d084..1ce91f9ed6 100644 --- a/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp +++ b/core/src/fpdfapi/fpdf_font/fpdf_font_cid.cpp @@ -830,6 +830,12 @@ FX_DWORD CPDF_CIDFont::_CharCodeFromUnicode(FX_WCHAR unicode) const break; } } + + if (unicode < 0x80) { + return static_cast<FX_DWORD>(unicode); + } else if (m_pCMap->m_Coding == CIDCODING_CID) { + return 0; + } #if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_ FX_BYTE buffer[32]; int ret = FXSYS_WideCharToMultiByte(g_CharsetCPs[m_pCMap->m_Coding], 0, &unicode, 1, (char*)buffer, 4, NULL, NULL); @@ -840,15 +846,10 @@ FX_DWORD CPDF_CIDFont::_CharCodeFromUnicode(FX_WCHAR unicode) const } return 0; #endif - if (unicode < 0x80) { - return (FX_DWORD)unicode; - } else { - if (m_pCMap->m_pEmbedMap) { - return _EmbeddedCharcodeFromUnicode(m_pCMap->m_pEmbedMap, m_pCMap->m_Charset, unicode); - } else { - return 0; - } + if (m_pCMap->m_pEmbedMap) { + return _EmbeddedCharcodeFromUnicode(m_pCMap->m_pEmbedMap, m_pCMap->m_Charset, unicode); } + return 0; } static void FT_UseCIDCharmap(FXFT_Face face, int coding) { |