File podofo_security-fixes-validate-more-encrypt-dictionary-parameters.patch of Package podofo.35912

commit 8f514d69b4ac3c9aa9f725fa93486fe4b7876642
Author: Francesco Pretto <ceztko@gmail.com>
Date:   Wed Jun 28 10:20:35 2023 +0200

    PdfEncrypt: Validate more encrypt dictionary parameters

    This was discussed in https://github.com/podofo/podofo/issues/72#issuecomment-1521737241

--- src/base/PdfEncrypt.cpp	2024-06-29 23:24:08.488484759 +0800
+++ src/base/PdfEncrypt.cpp	2024-06-30 01:19:33.526926190 +0800
@@ -1010,6 +1010,13 @@
     m_eAlgorithm = eAlgorithm;
     m_eKeyLength = static_cast<EPdfKeyLength>(length);
     m_keyLength  = length/8;
+
+    if (oValue.GetLength() < 32)
+        PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidEncryptionDict, "/O value is invalid");
+
+    if (uValue.GetLength() < 32)
+        PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidEncryptionDict, "/U value is invalid");
+
     memcpy( m_oValue, oValue.GetString(), 32 );
     memcpy( m_uValue, uValue.GetString(), 32 );
     
@@ -1702,6 +1709,22 @@
     m_eKeyLength = ePdfKeyLength_256;
     m_keyLength  = ePdfKeyLength_256 / 8;
     m_rValue	 = 5;
+
+    if (oValue.GetLength() < 48)
+        PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidEncryptionDict, "/O value is invalid");
+
+    if (oeValue.GetLength() < 32)
+        PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidEncryptionDict, "/OE value is invalid");
+
+    if (uValue.GetLength() < 48)
+        PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidEncryptionDict, "/U value is invalid");
+
+    if (ueValue.GetLength() < 32)
+        PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidEncryptionDict, "/UE value is invalid");
+
+    if (permsValue.GetLength() < 16)
+        PODOFO_RAISE_ERROR_INFO( ePdfError_InvalidEncryptionDict, "/Perms value is invalid");
+
     memcpy( m_oValue, oValue.GetString(), 48 );
     memcpy( m_oeValue, oeValue.GetString(), 32 );
     memcpy( m_uValue, uValue.GetString(), 48 );

--- src/base/PdfString.cpp	2024-06-29 23:24:08.360484891 +0800
+++ src/base/PdfString.cpp	2024-06-30 01:02:46.795354133 +0800
@@ -403,6 +403,11 @@
     pDevice->Print( m_bHex ? ">" : ")" );
 }
 
+const char* PdfString::GetString() const
+{
+    return m_buffer.GetBuffer();
+}
+
 const PdfString & PdfString::operator=( const PdfString & rhs )
 {
     this->m_bHex      = rhs.m_bHex;

--- src/base/PdfString.h	2011-01-21 22:36:59.000000000 +0800
+++ src/base/PdfString.h	2024-06-29 23:58:04.711185149 +0800
@@ -203,7 +203,7 @@
      *  \see IsUnicode
      *  \see Length
      */
-    inline const char* GetString() const;
+    const char* GetString() const;
 
     /** The contents of the strings can be read
      *  by this function.
@@ -450,14 +450,6 @@
 }
 
 // -----------------------------------------------------
-// 
-// -----------------------------------------------------
-const char* PdfString::GetString() const
-{
-    return m_buffer.GetBuffer();
-}
-
-// -----------------------------------------------------
 // 
 // -----------------------------------------------------
 const pdf_utf16be* PdfString::GetUnicode() const