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Overview
Comment:Fix safe mode authorizer callback to reject disallowed UDFs. Reported at Forum post 07beac8056151b2f.
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SHA3-256: cefc032473ac5ad244c0b6402c541b2f76c0c65a041bda03bfbe7c0e2c11fac2
User & Date: larrybr 2022-12-04 23:20:38
Context
2022-12-26
15:44
Fix safe mode authorizer callback to reject disallowed UDFs. Reported at Forum post 07beac8056151b2f. (check-in: 70964b8a user: drh tags: branch-3.40)
2022-12-05
02:52
Improved query planner cost estimates. Fix for ticket [e8b674241947eb3b]. (check-in: 1b779afa user: drh tags: trunk)
2022-12-04
23:20
Fix safe mode authorizer callback to reject disallowed UDFs. Reported at Forum post 07beac8056151b2f. (check-in: cefc0324 user: larrybr tags: trunk)
22:13
Fix safe mode authorizer callback to reject disallowed UDFs. Tests to follow. UPDATE: checked into the wrong branch. (Closed-Leaf check-in: 4d934f00 user: larrybr tags: wrong branch.)
08:16
Export sqlite3_result_zeroblob/zeroblob64() to wasm. (check-in: a60e5662 user: stephan tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/shell.c.in.
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    "fts3_tokenizer",
    "load_extension",
    "readfile",
    "writefile",
    "zipfile",
    "zipfile_cds",
  };
  UNUSED_PARAMETER(zA2);
  UNUSED_PARAMETER(zA3);
  UNUSED_PARAMETER(zA4);
  switch( op ){
    case SQLITE_ATTACH: {
#ifndef SQLITE_SHELL_FIDDLE
      /* In WASM builds the filesystem is a virtual sandbox, so
      ** there's no harm in using ATTACH. */
      failIfSafeMode(p, "cannot run ATTACH in safe mode");
#endif
      break;
    }
    case SQLITE_FUNCTION: {
      int i;
      for(i=0; i<ArraySize(azProhibitedFunctions); i++){
        if( sqlite3_stricmp(zA1, azProhibitedFunctions[i])==0 ){
          failIfSafeMode(p, "cannot use the %s() function in safe mode",
                         azProhibitedFunctions[i]);
        }
      }
      break;
    }
  }








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    "fts3_tokenizer",
    "load_extension",
    "readfile",
    "writefile",
    "zipfile",
    "zipfile_cds",
  };
  UNUSED_PARAMETER(zA1);
  UNUSED_PARAMETER(zA3);
  UNUSED_PARAMETER(zA4);
  switch( op ){
    case SQLITE_ATTACH: {
#ifndef SQLITE_SHELL_FIDDLE
      /* In WASM builds the filesystem is a virtual sandbox, so
      ** there's no harm in using ATTACH. */
      failIfSafeMode(p, "cannot run ATTACH in safe mode");
#endif
      break;
    }
    case SQLITE_FUNCTION: {
      int i;
      for(i=0; i<ArraySize(azProhibitedFunctions); i++){
        if( sqlite3_stricmp(zA2, azProhibitedFunctions[i])==0 ){
          failIfSafeMode(p, "cannot use the %s() function in safe mode",
                         azProhibitedFunctions[i]);
        }
      }
      break;
    }
  }
︙︙
Changes to test/shell2.test.
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# Reported at https://sqlite.org/forum/forumpost/718f489a43be3197
do_test shell2-1.4.7 {
  catchcmd ":memory:" {
 SELECT 'unclosed;}
} {1 {Parse error near line 2: unrecognized token: "'unclosed;"
  SELECT 'unclosed;
         ^--- error here}}













finish_test








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# Reported at https://sqlite.org/forum/forumpost/718f489a43be3197
do_test shell2-1.4.7 {
  catchcmd ":memory:" {
 SELECT 'unclosed;}
} {1 {Parse error near line 2: unrecognized token: "'unclosed;"
  SELECT 'unclosed;
         ^--- error here}}

# Verify that safe mode rejects certain UDFs
# Reported at https://sqlite.org/forum/forumpost/07beac8056151b2f
do_test shell2-1.4.8 {
  catchcmd "-safe :memory:" {
 SELECT edit('DoNotCare');}
} {1 {line 2: cannot use the edit() function in safe mode}}
do_test shell2-1.4.9 {
  catchcmd "-safe :memory:" {
 SELECT writefile('DoNotCare', x'');}
} {1 {line 2: cannot use the writefile() function in safe mode}}


finish_test