From 8ab88326cbb8ce03fd5c86e62fdb9faefd352956 Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Mon, 7 Oct 2013 00:36:01 +0000
Subject: [PATCH] Restore the hexrekey pragma which was accidently deleted
 during the pragma refactoring.  Make sure the hexkey and hexrekey pragmas do
 not overflow buffers with a over-length key.

FossilOrigin-Name: 0aca31e1514b3df254c049b4251bcb199831681a
---
 manifest             | 14 +++++++-------
 manifest.uuid        |  2 +-
 src/pragma.c         | 16 ++++++++++------
 tool/mkpragmatab.tcl |  4 ++++
 4 files changed, 22 insertions(+), 14 deletions(-)

diff --git a/manifest b/manifest
index 41ee89f9cb..f73f1c1ded 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Remove\san\sincorrect\sdebugging\sassert()\sthat\swas\saccidently\sadded\sduring\sthe\nSTAT4\senhancement.
-D 2013-10-06T22:52:51.495
+C Restore\sthe\shexrekey\spragma\swhich\swas\saccidently\sdeleted\sduring\sthe\npragma\srefactoring.\s\sMake\ssure\sthe\shexkey\sand\shexrekey\spragmas\sdo\snot\noverflow\sbuffers\swith\sa\sover-length\skey.
+D 2013-10-07T00:36:01.510
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -210,7 +210,7 @@ F src/parse.y a97566d6da75075589a7c716d1bda14b586cf8da
 F src/pcache.c f8043b433a57aba85384a531e3937a804432a346
 F src/pcache.h a5e4f5d9f5d592051d91212c5949517971ae6222
 F src/pcache1.c a467393909a4ed7ca9de066d85ba5c5b04a5be63
-F src/pragma.c 5a4d8d9c3c7d22ef920487a260ea3d4b59d3b3a6
+F src/pragma.c b65c8273162818095cfd2dd37bbbf791710de560
 F src/prepare.c fa6988589f39af8504a61731614cd4f6ae71554f
 F src/printf.c da9119eb31a187a4b99f60aa4a225141c0ebb74b
 F src/random.c 0b2dbc37fdfbfa6bd455b091dfcef5bdb32dba68
@@ -1088,7 +1088,7 @@ F tool/lempar.c 01ca97f87610d1dac6d8cd96ab109ab1130e76dc
 F tool/mkautoconfamal.sh f8d8dbf7d62f409ebed5134998bf5b51d7266383
 F tool/mkkeywordhash.c bb52064aa614e1426445e4b2b9b00eeecd23cc79
 F tool/mkopts.tcl 66ac10d240cc6e86abd37dc908d50382f84ff46e
-F tool/mkpragmatab.tcl 33fa7a6e824b14f7b04109ed75b19f3e9e228412
+F tool/mkpragmatab.tcl ceaaeebcd882864caefe4176592ca6fa4648fab1
 F tool/mkspeedsql.tcl a1a334d288f7adfe6e996f2e712becf076745c97
 F tool/mksqlite3c-noext.tcl 8bce31074e4cbe631bb7676526a048335f4c9f02
 F tool/mksqlite3c.tcl d344cc3144a0271cd853c5e3df36e9f31d78d619
@@ -1121,7 +1121,7 @@ F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/wherecosttest.c f407dc4c79786982a475261866a161cd007947ae
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P 087af29ee2e1572f8668dd0152a14d7f9796a530
-R 51b296de6c6fe46f937c9d0db2bd86cb
+P 2bb7f74bbd467b74581699d16b06758f9c9457dc
+R cb77936fe5ecaea76a165316bdd4333b
 U drh
-Z e830bdf0fada797e73e5410e79960d79
+Z 43e1a965446b3e0121e18fe95479d9fc
diff --git a/manifest.uuid b/manifest.uuid
index 9fa53530b1..4aae2f1188 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-2bb7f74bbd467b74581699d16b06758f9c9457dc
\ No newline at end of file
+0aca31e1514b3df254c049b4251bcb199831681a
\ No newline at end of file
diff --git a/src/pragma.c b/src/pragma.c
index f533b71c21..4e5d012a95 100644
--- a/src/pragma.c
+++ b/src/pragma.c
@@ -208,6 +208,10 @@ static const struct sPragmaNames {
     /* ePragTyp:  */ PragTyp_HEXKEY,
     /* ePragFlag: */ 0,
     /* iArg:      */ 0 },
+  { /* zName:     */ "hexrekey",
+    /* ePragTyp:  */ PragTyp_HEXKEY,
+    /* ePragFlag: */ 0,
+    /* iArg:      */ 0 },
 #endif
 #if !defined(SQLITE_OMIT_CHECK)
   { /* zName:     */ "ignore_check_constraints",
@@ -416,7 +420,7 @@ static const struct sPragmaNames {
     /* ePragFlag: */ 0,
     /* iArg:      */ SQLITE_WriteSchema|SQLITE_RecoveryMode },
 };
-/* Number of pragmas: 55 on by default, 66 total. */
+/* Number of pragmas: 55 on by default, 67 total. */
 /* End of the automatically generated pragma table.
 ***************************************************************************/
 
@@ -2177,12 +2181,12 @@ void sqlite3Pragma(
   }
   case PragTyp_HEXKEY: {
     if( zRight ){
-      int i, h1, h2;
+      u8 iByte;
+      int i;
       char zKey[40];
-      for(i=0; (h1 = zRight[i])!=0 && (h2 = zRight[i+1])!=0; i+=2){
-        h1 += 9*(1&(h1>>6));
-        h2 += 9*(1&(h2>>6));
-        zKey[i/2] = (h2 & 0x0f) | ((h1 & 0xf)<<4);
+      for(i=0, iByte=0; i<sizeof(zKey)*2 && sqlite3Isxdigit(zRight[i]); i++){
+        iByte = (iByte<<4) + sqlite3HexToInt(zRight[i]);
+        if( (i&1)!=0 ) zKey[i/2] = iByte;
       }
       if( (zLeft[3] & 0xf)==0xb ){
         sqlite3_key_v2(db, zDb, zKey, i/2);
diff --git a/tool/mkpragmatab.tcl b/tool/mkpragmatab.tcl
index 4416616f50..a5d9f5ab6d 100644
--- a/tool/mkpragmatab.tcl
+++ b/tool/mkpragmatab.tcl
@@ -254,6 +254,10 @@ set pragma_def {
   NAME: hexkey
   IF:   defined(SQLITE_HAS_CODEC)
 
+  NAME: hexrekey
+  TYPE: HEXKEY
+  IF:   defined(SQLITE_HAS_CODEC)
+
   NAME: activate_extensions
   IF:   defined(SQLITE_HAS_CODEC) || defined(SQLITE_ENABLE_CEROD)