libsql-ffi: Update vendored SQLite3MultipleCiphers to 1.9.0 (#2245)

Author: penberg

libsql-ffi/bundled/SQLite3MultipleCiphers/.editorconfig

@@ -0,0 +1,16 @@
+# This is the EditorConfig (http://editorconfig.org/) coding style file for
+# SQLite3 Multiple Ciphers.
+
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+
+[makefile.*]
+indent_style = tab
+indent_size = 8

libsql-ffi/bundled/SQLite3MultipleCiphers/CHANGELOG.md

@@ -7,6 +7,70 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.9.0] - 2024-10-22
+
+### Changed
+
+- Based on SQLite version 3.47.0
+- Changed signature of cipher scheme method `GenerateKey` (affects only developers of dynamic cipher schemes)
+
+### Fixed
+
+- Using differing KDF and HMAC algorithms resulted in databases incompatible with the original SQLCipher library. Setting the parameter `hmac_algorithm_compat` to 0 restores the (incompatible) behaviour.
+
+## [1.8.7] - 2024-08-14
+
+### Changed
+
+- Based on SQLite version 3.46.1
+
+## [1.8.6] - 2024-06-14
+
+### Changed
+
+- Removed extern keyword in function declarations
+- Cleaned up white space
+- Added SQLITE_PRIVATE for several internal functions
+- The cipher configuration parameter `legacy_page_size` now accepts only valid page sizes
+- The cipher configuration parameter `plaintext_header_size` now accepts only values that are multiples of 16
+
+### Fixed
+
+- Fixed issue [#156](../../issues/156)) - corrupted database if MMAP_SIZE > 0 was used
+- Fixed issue [#158](../../issues/158)) - add check to verify compatibility of source and target database in backup operation
+- Fixed issue [#160](../../issues/160)) - fix accessing memory out of array bounds
+- Fixed issue [#162](../../issues/162)) - fix loading/storing misaligned data
+- Fixed issue [#164](../../issues/164)) - fix return of error messages from rekey
+- Fixed issue [#165](../../issues/165)) - fix rekey function by enforcing page size and number of reserved bytes per page
+- Fixed issue [#166](../../issues/166)) - missing attribute SQLITE_PRIVATE for several internal functions
+- Fixed issue [#167](../../issues/167)) - improve VFS error reporting
+- Fixed issue [#168](../../issues/168)) - add check for encryption support
+
+## [1.8.5] - 2024-05-24
+
+### Changed
+
+- Based on SQLite version 3.46.0
+
+## [1.8.4] - 2024-03-14
+
+### Changed
+
+- Based on SQLite version 3.45.2
+- Disable user authentication extension by default
+
+## [1.8.3] - 2024-01-31
+
+### Changed
+
+- Based on SQLite version 3.45.1
+
+## [1.8.2] - 2024-01-16
+
+### Changed
+
+- Based on SQLite version 3.45.0
+
 ## [1.8.1] - 2023-12-02
 
 ### Changed
@@ -469,7 +533,15 @@ The following ciphers are supported:
 - AES 256 Bit CBC - SHA1/SHA256/SHA512 HMAC ([SQLCipher](https://www.zetetic.net/sqlcipher/), database versions 1, 2, 3, and 4)
 - RC4 - No HMAC ([System.Data.SQLite](http://system.data.sqlite.org))
 
-[Unreleased]: ../../compare/v1.8.0...HEAD
+[Unreleased]: ../../compare/v1.9.0...HEAD
+[1.9.0]: ../../compare/v1.8.7...v1.9.0
+[1.8.7]: ../../compare/v1.8.6...v1.8.7
+[1.8.6]: ../../compare/v1.8.5...v1.8.6
+[1.8.5]: ../../compare/v1.8.4...v1.8.5
+[1.8.4]: ../../compare/v1.8.3...v1.8.4
+[1.8.3]: ../../compare/v1.8.2...v1.8.3
+[1.8.2]: ../../compare/v1.8.1...v1.8.2
+[1.8.1]: ../../compare/v1.8.0...v1.8.1
 [1.8.0]: ../../compare/v1.7.4...v1.8.0
 [1.7.4]: ../../compare/v1.7.3...v1.7.4
 [1.7.3]: ../../compare/v1.7.2...v1.7.3

libsql-ffi/bundled/SQLite3MultipleCiphers/CMakeLists.txt

@@ -32,7 +32,7 @@ OPTION(SQLITE_ENABLE_JSON1 "Enable extension 'json1'" ON)
 OPTION(SQLITE_ENABLE_RTREE "Enable extension 'rtree'" ON)
 OPTION(SQLITE_ENABLE_UUID "Enable extension 'uuid'" ON)
 OPTION(SQLITE_USE_URI "Enable the URI filename process logic" ON)
-OPTION(SQLITE_USER_AUTHENTICATION "Enable extension 'user authentication'" ON)
+OPTION(SQLITE_USER_AUTHENTICATION "Enable extension 'user authentication'" OFF)
 OPTION(SQLITE_ENABLE_PREUPDATE_HOOK "Enable preupdate hooks" OFF)
 OPTION(SQLITE_ENABLE_SESSION "Enable session extension" OFF)
 OPTION(SQLITE_SHELL_IS_UTF8 "Shell command line arguments in UTF-8 encoding" ON)
@@ -64,7 +64,6 @@ OPTION(SQLITE3MC_USE_SQLCIPHER_LEGACY "Use sqlcipher legacy mode as default" OFF
 
 # Additional memory security (filling freed memory allocations with zeros or random data)
 OPTION(SQLITE3MC_SECURE_MEMORY "Enable pragma to secure freed memory" OFF)
-OPTION(SQLITE3MC_USE_RANDOM_FILL_MEMORY "Fill freed memory with random data" OFF)
 
 # Omit AES hardware support
 OPTION(SQLITE3MC_OMIT_AES_HARDWARE_SUPPORT "Omit AES hardware support" OFF)
@@ -182,12 +181,6 @@ if(SQLITE3MC_SECURE_MEMORY)
     SQLITE3MC_SECURE_MEMORY=1
   )
 endif()
-if(SQLITE3MC_USE_RANDOM_FILL_MEMORY)
-  set(SQLITE3MC_BASE_DEFINITIONS 
-    ${SQLITE3MC_BASE_DEFINITIONS}
-    SQLITE3MC_USE_RANDOM_FILL_MEMORY=1
-  )
-endif()
 
 if(SQLITE3MC_USE_MINIZ OR _SQLITE3MC_REQUIRE_ZLIB)
   if(_SQLITE3MC_REQUIRE_ZLIB)

libsql-ffi/bundled/SQLite3MultipleCiphers/LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019-2020 Ulrich Telle
+Copyright (c) 2019-2024 Ulrich Telle
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

libsql-ffi/bundled/SQLite3MultipleCiphers/Makefile.am

@@ -24,7 +24,7 @@ ACLOCAL_AMFLAGS = -I admin/m4
 AM_CXXFLAGS = -I$(top_srcdir)/src
 AM_CFLAGS   = -I$(top_srcdir)/src
 
-AM_CFLAGS += -std=c99 -DSQLITE_THREADSAFE=1 -DSQLITE_DQS=0 -DSQLITE_MAX_ATTACHED=10 -DSQLITE_SOUNDEX=1 -DSQLITE_ENABLE_COLUMN_METADATA=1 -DSQLITE_SECURE_DELETE=1 -DSQLITE_ENABLE_DESERIALIZE=1 -DSQLITE_ENABLE_FTS3=1 -DSQLITE_ENABLE_FTS3_PARENTHESIS=1 -DSQLITE_ENABLE_FTS4=1 -DSQLITE_ENABLE_FTS5=1 -DSQLITE_ENABLE_JSON1=1 -DSQLITE_ENABLE_RTREE=1 -DSQLITE_ENABLE_GEOPOLY=1 -DSQLITE_ENABLE_PREUPDATE_HOOK=1 -DSQLITE_ENABLE_SESSION=1 -DSQLITE_CORE=1 -DSQLITE_ENABLE_EXTFUNC=1 -DSQLITE_ENABLE_MATH_FUNCTIONS=1 -DSQLITE_ENABLE_CSV=1 -DSQLITE_ENABLE_SHA3=1 -DSQLITE_ENABLE_CARRAY=1 -DSQLITE_ENABLE_FILEIO=1 -DSQLITE_ENABLE_SERIES=1 -DSQLITE_ENABLE_UUID=1 -DSQLITE_ENABLE_REGEXP=1 -DSQLITE_TEMP_STORE=2 -DSQLITE_USE_URI=1 -DSQLITE_USER_AUTHENTICATION=1 $(X86_FLAGS) $(ARM_FLAGS)
+AM_CFLAGS += -std=c99 -DSQLITE_THREADSAFE=1 -DSQLITE_DQS=0 -DSQLITE_MAX_ATTACHED=10 -DSQLITE_SOUNDEX=1 -DSQLITE_ENABLE_COLUMN_METADATA=1 -DSQLITE_SECURE_DELETE=1 -DSQLITE_ENABLE_DESERIALIZE=1 -DSQLITE_ENABLE_FTS3=1 -DSQLITE_ENABLE_FTS3_PARENTHESIS=1 -DSQLITE_ENABLE_FTS4=1 -DSQLITE_ENABLE_FTS5=1 -DSQLITE_ENABLE_JSON1=1 -DSQLITE_ENABLE_RTREE=1 -DSQLITE_ENABLE_GEOPOLY=1 -DSQLITE_ENABLE_PREUPDATE_HOOK=1 -DSQLITE_ENABLE_SESSION=1 -DSQLITE_CORE=1 -DSQLITE_ENABLE_EXTFUNC=1 -DSQLITE_ENABLE_MATH_FUNCTIONS=1 -DSQLITE_ENABLE_CSV=1 -DSQLITE_ENABLE_SHA3=1 -DSQLITE_ENABLE_CARRAY=1 -DSQLITE_ENABLE_FILEIO=1 -DSQLITE_ENABLE_SERIES=1 -DSQLITE_ENABLE_UUID=1 -DSQLITE_ENABLE_REGEXP=1 -DSQLITE_TEMP_STORE=2 -DSQLITE_USE_URI=1 -DSQLITE_USER_AUTHENTICATION=0 $(X86_FLAGS) $(ARM_FLAGS)
 
 if HOST_WINDOWS
 AM_CFLAGS += -DSQLITE_API=__declspec\(dllexport\)
@@ -138,7 +138,7 @@ sqlite3shell_SOURCES = \
     src/sqlite3mc.c \
     src/shell.c
 
-sqlite3shell_CFLAGS = -I$(top_srcdir)/src -std=c99 -D_GNU_SOURCE -DSQLITE_THREADSAFE=1 -DSQLITE_DQS=0 -DSQLITE_MAX_ATTACHED=10 -DSQLITE_SOUNDEX=1 -DSQLITE_ENABLE_COLUMN_METADATA=1 -DSQLITE_SECURE_DELETE=1 -DSQLITE_ENABLE_DESERIALIZE=1 -DSQLITE_ENABLE_FTS3=1 -DSQLITE_ENABLE_FTS3_PARENTHESIS=1 -DSQLITE_ENABLE_FTS4=1 -DSQLITE_ENABLE_FTS5=1 -DSQLITE_ENABLE_JSON1=1 -DSQLITE_ENABLE_RTREE=1 -DSQLITE_ENABLE_GEOPOLY=1 -DSQLITE_ENABLE_PREUPDATE_HOOK=1 -DSQLITE_ENABLE_SESSION=1 -DSQLITE_CORE=1 -DSQLITE_ENABLE_EXTFUNC=1 -DSQLITE_ENABLE_MATH_FUNCTIONS=1 -DSQLITE_ENABLE_CSV=1 -DSQLITE_ENABLE_CARRAY=1 -DSQLITE_ENABLE_UUID=1 -DSQLITE_TEMP_STORE=2 -DSQLITE_USE_URI=1 -DSQLITE_USER_AUTHENTICATION=1 -DSQLITE_ENABLE_DBPAGE_VTAB=1 -DSQLITE_ENABLE_DBSTAT_VTAB=1 -DSQLITE_ENABLE_STMTVTAB=1 -DSQLITE_ENABLE_UNKNOWN_SQL_FUNCTION=1 $(X86_FLAGS) $(ARM_FLAGS)
+sqlite3shell_CFLAGS = -I$(top_srcdir)/src -std=c99 -D_GNU_SOURCE -DSQLITE_THREADSAFE=1 -DSQLITE_DQS=0 -DSQLITE_MAX_ATTACHED=10 -DSQLITE_SOUNDEX=1 -DSQLITE_ENABLE_COLUMN_METADATA=1 -DSQLITE_SECURE_DELETE=1 -DSQLITE_ENABLE_DESERIALIZE=1 -DSQLITE_ENABLE_FTS3=1 -DSQLITE_ENABLE_FTS3_PARENTHESIS=1 -DSQLITE_ENABLE_FTS4=1 -DSQLITE_ENABLE_FTS5=1 -DSQLITE_ENABLE_JSON1=1 -DSQLITE_ENABLE_RTREE=1 -DSQLITE_ENABLE_GEOPOLY=1 -DSQLITE_ENABLE_PREUPDATE_HOOK=1 -DSQLITE_ENABLE_SESSION=1 -DSQLITE_CORE=1 -DSQLITE_ENABLE_EXTFUNC=1 -DSQLITE_ENABLE_MATH_FUNCTIONS=1 -DSQLITE_ENABLE_CSV=1 -DSQLITE_ENABLE_CARRAY=1 -DSQLITE_ENABLE_UUID=1 -DSQLITE_TEMP_STORE=2 -DSQLITE_USE_URI=1 -DSQLITE_USER_AUTHENTICATION=0 -DSQLITE_ENABLE_DBPAGE_VTAB=1 -DSQLITE_ENABLE_DBSTAT_VTAB=1 -DSQLITE_ENABLE_STMTVTAB=1 -DSQLITE_ENABLE_UNKNOWN_SQL_FUNCTION=1 $(X86_FLAGS) $(ARM_FLAGS)
 
 if HOST_WINDOWS
 sqlite3shell_LDADD =

libsql-ffi/bundled/SQLite3MultipleCiphers/configure.ac

@@ -1,10 +1,10 @@
 dnl Process this script with autoconf to create configure for sqlite3mc library
 dnl
-dnl Copyright (C) 2019-2023 Ulrich Telle <ulrich@telle-online.de>
+dnl Copyright (C) 2019-2024 Ulrich Telle <ulrich@telle-online.de>
 dnl
 dnl This file is covered by the same licence as the entire SQLite3 Multiple Ciphers package.
 
-AC_INIT([sqlite3mc], [1.8.1], [ulrich@telle-online.de])
+AC_INIT([sqlite3mc], [1.9.0], [ulrich@telle-online.de])
 
 dnl This is the version tested with, might work with earlier ones.
 AC_PREREQ([2.69])

libsql-ffi/bundled/SQLite3MultipleCiphers/premake5.lua

@@ -92,10 +92,9 @@ project "sqlite3mc_lib"
 --    "SQLITE_ENABLE_SQLAR=1"
 --    "SQLITE_ENABLE_ZIPFILE=1"
     "SQLITE3MC_SECURE_MEMORY=$(SQLITE3MC_SECURE_MEMORY)",
---    "SQLITE3MC_USE_RANDOM_FILL_MEMORY=$(SQLITE3MC_USE_RANDOM_FILL_MEMORY)",
     "SQLITE_TEMP_STORE=2",
     "SQLITE_USE_URI=1",
-    "SQLITE_USER_AUTHENTICATION=1",
+    "SQLITE_USER_AUTHENTICATION=0",
 -- Compatibility with official SQLite3 shell
     "SQLITE_ENABLE_DBPAGE_VTAB=1",
     "SQLITE_ENABLE_DBSTAT_VTAB=1",
@@ -190,10 +189,9 @@ project "sqlite3mc_dll"
 --    "SQLITE_ENABLE_SQLAR=1"
 --    "SQLITE_ENABLE_ZIPFILE=1"
     "SQLITE3MC_SECURE_MEMORY=$(SQLITE3MC_SECURE_MEMORY)",
---    "SQLITE3MC_USE_RANDOM_FILL_MEMORY=$(SQLITE3MC_USE_RANDOM_FILL_MEMORY)",
     "SQLITE_TEMP_STORE=2",
     "SQLITE_USE_URI=1",
-    "SQLITE_USER_AUTHENTICATION=1"
+    "SQLITE_USER_AUTHENTICATION=0"
   }
 
   -- Intermediate directory
@@ -251,7 +249,7 @@ project "sqlite3mc_shell"
     "SQLITE_SHELL_IS_UTF8=1",
     "SQLITE_ENABLE_SESSION=1",
     "SQLITE_ENABLE_DBPAGE_VTAB=1",
-    "SQLITE_USER_AUTHENTICATION=1"
+    "SQLITE_USER_AUTHENTICATION=0"
   }
 
   -- Intermediate directory
@@ -342,10 +340,9 @@ project "sqlite3mc_libicu"
 --    "SQLITE_ENABLE_SQLAR=1"
 --    "SQLITE_ENABLE_ZIPFILE=1"
     "SQLITE3MC_SECURE_MEMORY=$(SQLITE3MC_SECURE_MEMORY)",
---    "SQLITE3MC_USE_RANDOM_FILL_MEMORY=$(SQLITE3MC_USE_RANDOM_FILL_MEMORY)",
     "SQLITE_TEMP_STORE=2",
     "SQLITE_USE_URI=1",
-    "SQLITE_USER_AUTHENTICATION=1",
+    "SQLITE_USER_AUTHENTICATION=0",
 -- Compatibility with official SQLite3 shell
     "SQLITE_ENABLE_DBPAGE_VTAB=1",
     "SQLITE_ENABLE_DBSTAT_VTAB=1",
@@ -453,10 +450,9 @@ project "sqlite3mc_dllicu"
 --    "SQLITE_ENABLE_SQLAR=1"
 --    "SQLITE_ENABLE_ZIPFILE=1"
     "SQLITE3MC_SECURE_MEMORY=$(SQLITE3MC_SECURE_MEMORY)",
---    "SQLITE3MC_USE_RANDOM_FILL_MEMORY=$(SQLITE3MC_USE_RANDOM_FILL_MEMORY)",
     "SQLITE_TEMP_STORE=2",
     "SQLITE_USE_URI=1",
-    "SQLITE_USER_AUTHENTICATION=1"
+    "SQLITE_USER_AUTHENTICATION=0"
   }
 
   -- Intermediate directory
@@ -526,7 +522,7 @@ project "sqlite3mc_shellicu"
     "SQLITE_SHELL_IS_UTF8=1",
     "SQLITE_ENABLE_SESSION=1",
     "SQLITE_ENABLE_DBPAGE_VTAB=1",
-    "SQLITE_USER_AUTHENTICATION=1"
+    "SQLITE_USER_AUTHENTICATION=0"
   }
 
   -- Intermediate directory

libsql-ffi/bundled/SQLite3MultipleCiphers/readme.md

@@ -10,10 +10,10 @@ The code was mainly developed under Windows, but was tested under Linux as well.
 
 ## Version information
 
-* 1.8.1 - *December 2023*
-  - Based on SQLite version 3.44.2
-  - Fixed issue #133 - missing API symbols
-  - Applied several modifications to improve support for [SQLite3 WASM](https://sqlite.org/wasm/)
+* 1.9.0 - *October 2024*
+  - Based on SQLite version 3.47.0
+  - Changed signature of cipher scheme method `GenerateKey` (affects only developers of dynamic cipher schemes)
+  - Using differing KDF and HMAC algorithms resulted in databases incompatible with the original SQLCipher library. Setting the parameter `hmac_algorithm_compat` to 0 restores the (incompatible) behaviour.
 
 For further version information please consult the [CHANGELOG](CHANGELOG.md).
 

libsql-ffi/bundled/SQLite3MultipleCiphers/scripts/patchshell.sh

@@ -14,7 +14,10 @@ die() {
     exit 2
 }
 
-sed -e '/^      oputf("SQLite version/{n;N;d}' "$INPUT" \
+sed -e '/^      sputf(stdout, "SQLite version/{n;N;d}' "$INPUT" \
   | sed '/#ifdef SQLITE_CUSTOM_INCLUDE/!{p;d;};n;n;n;a #if SQLITE3MC_USE_MINIZ != 0 && !defined(SQLITE_ENABLE_COMPRESS)\n#include "miniz.c"\n#ifdef SQLITE_HAVE_ZLIB\n#undef SQLITE_HAVE_ZLIB\n#endif\n#define SQLITE_HAVE_ZLIB 1\n#endif\n' \
   | sed '/#include <zlib.h>/c #include "zlibwrap.h"' \
-  | sed '/^      oputf("SQLite version/c \      extern char* sqlite3mc_version();\n      oputf("SQLite version \%s \%.19s%s" \/\*extra-version-info\*\/\n        " (\%s)\\n" \/\*SQLite3-Multiple-Ciphers-version-info\*\/\n        "Enter \\".help\\" for usage hints.\\n\",\n        sqlite3_libversion(), sqlite3_sourceid(), SHELL_CIO_CHAR_SET, sqlite3mc_version());'
+  | sed '/^      sqlite3_fprintf(stdout,$/c \      extern char* sqlite3mc_version();\n      sqlite3_fprintf(stdout,' \
+  | sed '/^            "SQLite version/c \            "SQLite version \%s \%.19s%s" \/\*extra-version-info\*\/\n            " (\%s)\\n" \/\*SQLite3-Multiple-Ciphers-version-info\*\/' \
+  | sed '/^            sqlite3_libversion(), sqlite3_sourceid(), SHELL_CIO_CHAR_SET);/c \            sqlite3_libversion(), sqlite3_sourceid(), SHELL_CIO_CHAR_SET, sqlite3mc_version());' \
+  | sed '/^          sqlite3_libversion(), sqlite3_sourceid());/a \    extern char* sqlite3mc_version();\n    sqlite3_fprintf(p->out, "\%s\\n", sqlite3mc_version());'

libsql-ffi/bundled/SQLite3MultipleCiphers/scripts/patchsqlite3.sh

@@ -17,7 +17,7 @@ die() {
 # 1) Intercept VFS pragma handling
 # 2) Add handling of KEY parameter in ATTACH statements
 sed 's/sqlite3_file_control\(.*SQLITE_FCNTL_PRAGMA\)/sqlite3mcFileControlPragma\1/' "$INPUT" \
-    | sed '/\#endif \/\* SQLITE3\_H \*\//a \ \n\/\* Function prototypes of SQLite3 Multiple Ciphers \*\/\nSQLITE_PRIVATE int sqlite3mcCheckVfs(const char*);\nSQLITE_PRIVATE int sqlite3mcFileControlPragma(sqlite3*, const char*, int, void*);\nSQLITE_PRIVATE int sqlite3mcHandleAttachKey(sqlite3*, const char*, const char*, sqlite3_value*, char**);\nSQLITE_PRIVATE int sqlite3mcHandleMainKey(sqlite3*, const char*);\ntypedef struct PgHdr PgHdrMC;\nSQLITE_PRIVATE void* sqlite3mcPagerCodec(PgHdrMC* pPg);\ntypedef struct Pager PagerMC;\nSQLITE_PRIVATE int sqlite3mcPagerHasCodec(PagerMC* pPager);\nSQLITE_PRIVATE void sqlite3mcInitMemoryMethods();' \
+    | sed '/\#endif \/\* SQLITE3\_H \*\//a \ \n\/\* Function prototypes of SQLite3 Multiple Ciphers \*\/\nSQLITE_PRIVATE int sqlite3mcCheckVfs(const char*);\nSQLITE_PRIVATE int sqlite3mcFileControlPragma(sqlite3*, const char*, int, void*);\nSQLITE_PRIVATE int sqlite3mcHandleAttachKey(sqlite3*, const char*, const char*, sqlite3_value*, char**);\nSQLITE_PRIVATE int sqlite3mcHandleMainKey(sqlite3*, const char*);\ntypedef struct PgHdr PgHdrMC;\nSQLITE_PRIVATE void* sqlite3mcPagerCodec(PgHdrMC* pPg);\ntypedef struct Pager PagerMC;\nSQLITE_PRIVATE int sqlite3mcPagerHasCodec(PagerMC* pPager);\nSQLITE_PRIVATE void sqlite3mcInitMemoryMethods();\nSQLITE_PRIVATE int sqlite3mcIsBackupSupported(sqlite3*, const char*, sqlite3*, const char*);' \
     | sed '/\#define MAX\_PATHNAME 512/c #if SQLITE3MC\_MAX\_PATHNAME \> 512\n#define MAX_PATHNAME SQLITE3MC\_MAX\_PATHNAME\n#else\n#define MAX_PATHNAME 512\n#endif' \
     | sed '/pData = pPage->pData;/c \  if( (pData = sqlite3mcPagerCodec(pPage))==0 ) return SQLITE_NOMEM_BKPT;' \
     | sed '/pData = p->pData;/c \        if( (pData = sqlite3mcPagerCodec(p))==0 ) return SQLITE_NOMEM;' \
@@ -26,4 +26,5 @@ sed 's/sqlite3_file_control\(.*SQLITE_FCNTL_PRAGMA\)/sqlite3mcFileControlPragma\
     | sed '/sqlite3_free_filename(zOpen);/i \\n  \/\* Handle encryption related URI parameters. \*\/\n  if( rc==SQLITE_OK ){\n    rc = sqlite3mcHandleMainKey(db, zOpen);\n  }' \
     | sed '/^  if( sqlite3PCacheIsDirty(pPager->pPCache) ) return 0;/a \  if( sqlite3mcPagerHasCodec(pPager) != 0 ) return 0;' \
     | sed '/^  }else if( USEFETCH(pPager) ){/c \  }else if( USEFETCH(pPager) && sqlite3mcPagerHasCodec(pPager) == 0 ){' \
-    | sed '/^  if( rc!=SQLITE_OK ) memset(&mem0, 0, sizeof(mem0));/a \\n  \/\* Initialize wrapper for memory management.\*\/\n  if( rc==SQLITE_OK ) {\n    sqlite3mcInitMemoryMethods();\n  }\n'
+    | sed '/^  if( rc!=SQLITE_OK ) memset(&mem0, 0, sizeof(mem0));/a \\n  \/\* Initialize wrapper for memory management.\*\/\n  if( rc==SQLITE_OK ) {\n    sqlite3mcInitMemoryMethods();\n  }\n' \
+    | sed '/Lock the source database handle./i \  \/\* Check whether databases are compatible with backup \*\/\n  if (!sqlite3mcIsBackupSupported(pSrcDb, zSrcDb, pDestDb, zDestDb)){\n    sqlite3ErrorWithMsg(pDestDb, SQLITE_ERROR, \"backup is not supported with incompatible source and target databases\");\n    return NULL;\n  }\n'