[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/ext/userauth/userauth.c

Index: third_party/sqlite/sqlite-src-3080704/ext/userauth/userauth.c
diff --git a/third_party/sqlite/sqlite-src-3080704/ext/userauth/userauth.c b/third_party/sqlite/sqlite-src-3080704/ext/userauth/userauth.c
deleted file mode 100644
index 6ce99053d3666f0b21846cbc741e3f56be9b190d..0000000000000000000000000000000000000000
--- a/third_party/sqlite/sqlite-src-3080704/ext/userauth/userauth.c
+++ /dev/null
@@ -1,355 +0,0 @@
-/*
-** 2014-09-08
-**
-** The author disclaims copyright to this source code.  In place of
-** a legal notice, here is a blessing:
-**
-**    May you do good and not evil.
-**    May you find forgiveness for yourself and forgive others.
-**    May you share freely, never taking more than you give.
-**
-*************************************************************************
-**
-** This file contains the bulk of the implementation of the
-** user-authentication extension feature.  Some parts of the user-
-** authentication code are contained within the SQLite core (in the
-** src/ subdirectory of the main source code tree) but those parts
-** that could reasonable be separated out are moved into this file.
-**
-** To compile with the user-authentication feature, append this file to
-** end of an SQLite amalgamation, then add the SQLITE_USER_AUTHENTICATION
-** compile-time option.  See the user-auth.txt file in the same source
-** directory as this file for additional information.
-*/
-#ifdef SQLITE_USER_AUTHENTICATION
-#ifndef _SQLITEINT_H_
-# include "sqliteInt.h"
-#endif
-
-/*
-** Prepare an SQL statement for use by the user authentication logic.
-** Return a pointer to the prepared statement on success.  Return a
-** NULL pointer if there is an error of any kind.
-*/
-static sqlite3_stmt *sqlite3UserAuthPrepare(
-  sqlite3 *db,
-  const char *zFormat,
-  ...
-){
-  sqlite3_stmt *pStmt;
-  char *zSql;
-  int rc;
-  va_list ap;
-  int savedFlags = db->flags;
-
-  va_start(ap, zFormat);
-  zSql = sqlite3_vmprintf(zFormat, ap);
-  va_end(ap);
-  if( zSql==0 ) return 0;
-  db->flags |= SQLITE_WriteSchema;
-  rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
-  db->flags = savedFlags;
-  sqlite3_free(zSql);
-  if( rc ){
-    sqlite3_finalize(pStmt);
-    pStmt = 0;
-  }
-  return pStmt;
-}
-
-/*
-** Check to see if the sqlite_user table exists in database zDb.
-*/
-static int userTableExists(sqlite3 *db, const char *zDb){
-  int rc;
-  sqlite3_mutex_enter(db->mutex);
-  sqlite3BtreeEnterAll(db);
-  if( db->init.busy==0 ){
-    char *zErr = 0;
-    sqlite3Init(db, &zErr);
-    sqlite3DbFree(db, zErr);
-  }
-  rc = sqlite3FindTable(db, "sqlite_user", zDb)!=0;
-  sqlite3BtreeLeaveAll(db);
-  sqlite3_mutex_leave(db->mutex);
-  return rc;
-}
-
-/*
-** Check to see if database zDb has a "sqlite_user" table and if it does
-** whether that table can authenticate zUser with nPw,zPw.  Write one of
-** the UAUTH_* user authorization level codes into *peAuth and return a
-** result code.
-*/
-static int userAuthCheckLogin(
-  sqlite3 *db,               /* The database connection to check */
-  const char *zDb,           /* Name of specific database to check */
-  u8 *peAuth                 /* OUT: One of UAUTH_* constants */
-){
-  sqlite3_stmt *pStmt;
-  int rc;
-
-  *peAuth = UAUTH_Unknown;
-  if( !userTableExists(db, "main") ){
-    *peAuth = UAUTH_Admin;  /* No sqlite_user table.  Everybody is admin. */
-    return SQLITE_OK;
-  }
-  if( db->auth.zAuthUser==0 ){
-    *peAuth = UAUTH_Fail;
-    return SQLITE_OK;
-  }
-  pStmt = sqlite3UserAuthPrepare(db,
-            "SELECT pw=sqlite_crypt(?1,pw), isAdmin FROM \"%w\".sqlite_user"
-            " WHERE uname=?2", zDb);
-  if( pStmt==0 ) return SQLITE_NOMEM;
-  sqlite3_bind_blob(pStmt, 1, db->auth.zAuthPW, db->auth.nAuthPW,SQLITE_STATIC);
-  sqlite3_bind_text(pStmt, 2, db->auth.zAuthUser, -1, SQLITE_STATIC);
-  rc = sqlite3_step(pStmt);
-  if( rc==SQLITE_ROW && sqlite3_column_int(pStmt,0) ){
-    *peAuth = sqlite3_column_int(pStmt, 1) + UAUTH_User;
-  }else{
-    *peAuth = UAUTH_Fail;
-  }
-  return sqlite3_finalize(pStmt);
-}
-int sqlite3UserAuthCheckLogin(
-  sqlite3 *db,               /* The database connection to check */
-  const char *zDb,           /* Name of specific database to check */
-  u8 *peAuth                 /* OUT: One of UAUTH_* constants */
-){
-  int rc;
-  u8 savedAuthLevel;
-  assert( zDb!=0 );
-  assert( peAuth!=0 );
-  savedAuthLevel = db->auth.authLevel;
-  db->auth.authLevel = UAUTH_Admin;
-  rc = userAuthCheckLogin(db, zDb, peAuth);
-  db->auth.authLevel = savedAuthLevel;
-  return rc;
-}
-
-/*
-** If the current authLevel is UAUTH_Unknown, the take actions to figure
-** out what authLevel should be
-*/
-void sqlite3UserAuthInit(sqlite3 *db){
-  if( db->auth.authLevel==UAUTH_Unknown ){
-    u8 authLevel = UAUTH_Fail;
-    sqlite3UserAuthCheckLogin(db, "main", &authLevel);
-    db->auth.authLevel = authLevel;
-    if( authLevel<UAUTH_Admin ) db->flags &= ~SQLITE_WriteSchema;
-  }
-}
-
-/*
-** Implementation of the sqlite_crypt(X,Y) function.
-**
-** If Y is NULL then generate a new hash for password X and return that
-** hash.  If Y is not null, then generate a hash for password X using the
-** same salt as the previous hash Y and return the new hash.
-*/
-void sqlite3CryptFunc(
-  sqlite3_context *context,
-  int NotUsed,
-  sqlite3_value **argv
-){
-  const char *zIn;
-  int nIn, ii;
-  u8 *zOut;
-  char zSalt[8];
-  zIn = sqlite3_value_blob(argv[0]);
-  nIn = sqlite3_value_bytes(argv[0]);
-  if( sqlite3_value_type(argv[1])==SQLITE_BLOB
-   && sqlite3_value_bytes(argv[1])==nIn+sizeof(zSalt)
-  ){
-    memcpy(zSalt, sqlite3_value_blob(argv[1]), sizeof(zSalt));
-  }else{
-    sqlite3_randomness(sizeof(zSalt), zSalt);
-  }
-  zOut = sqlite3_malloc( nIn+sizeof(zSalt) );
-  if( zOut==0 ){
-    sqlite3_result_error_nomem(context);
-  }else{
-    memcpy(zOut, zSalt, sizeof(zSalt));
-    for(ii=0; ii<nIn; ii++){
-      zOut[ii+sizeof(zSalt)] = zIn[ii]^zSalt[ii&0x7];
-    }
-    sqlite3_result_blob(context, zOut, nIn+sizeof(zSalt), sqlite3_free);
-  }
-}
-
-/*
-** If a database contains the SQLITE_USER table, then the
-** sqlite3_user_authenticate() interface must be invoked with an
-** appropriate username and password prior to enable read and write
-** access to the database.
-**
-** Return SQLITE_OK on success or SQLITE_ERROR if the username/password
-** combination is incorrect or unknown.
-**
-** If the SQLITE_USER table is not present in the database file, then
-** this interface is a harmless no-op returnning SQLITE_OK.
-*/
-int sqlite3_user_authenticate(
-  sqlite3 *db,           /* The database connection */
-  const char *zUsername, /* Username */
-  const char *zPW,       /* Password or credentials */
-  int nPW                /* Number of bytes in aPW[] */
-){
-  int rc;
-  u8 authLevel = UAUTH_Fail;
-  db->auth.authLevel = UAUTH_Unknown;
-  sqlite3_free(db->auth.zAuthUser);
-  sqlite3_free(db->auth.zAuthPW);
-  memset(&db->auth, 0, sizeof(db->auth));
-  db->auth.zAuthUser = sqlite3_mprintf("%s", zUsername);
-  if( db->auth.zAuthUser==0 ) return SQLITE_NOMEM;
-  db->auth.zAuthPW = sqlite3_malloc( nPW+1 );
-  if( db->auth.zAuthPW==0 ) return SQLITE_NOMEM;
-  memcpy(db->auth.zAuthPW,zPW,nPW);
-  db->auth.nAuthPW = nPW;
-  rc = sqlite3UserAuthCheckLogin(db, "main", &authLevel);
-  db->auth.authLevel = authLevel;
-  sqlite3ExpirePreparedStatements(db);
-  if( rc ){
-    return rc;           /* OOM error, I/O error, etc. */
-  }
-  if( authLevel<UAUTH_User ){
-    return SQLITE_AUTH;  /* Incorrect username and/or password */
-  }
-  return SQLITE_OK;      /* Successful login */
-}
-
-/*
-** The sqlite3_user_add() interface can be used (by an admin user only)
-** to create a new user.  When called on a no-authentication-required
-** database, this routine converts the database into an authentication-
-** required database, automatically makes the added user an
-** administrator, and logs in the current connection as that user.
-** The sqlite3_user_add() interface only works for the "main" database, not
-** for any ATTACH-ed databases.  Any call to sqlite3_user_add() by a
-** non-admin user results in an error.
-*/
-int sqlite3_user_add(
-  sqlite3 *db,           /* Database connection */
-  const char *zUsername, /* Username to be added */
-  const char *aPW,       /* Password or credentials */
-  int nPW,               /* Number of bytes in aPW[] */
-  int isAdmin            /* True to give new user admin privilege */
-){
-  sqlite3_stmt *pStmt;
-  int rc;
-  sqlite3UserAuthInit(db);
-  if( db->auth.authLevel<UAUTH_Admin ) return SQLITE_AUTH;
-  if( !userTableExists(db, "main") ){
-    if( !isAdmin ) return SQLITE_AUTH;
-    pStmt = sqlite3UserAuthPrepare(db, 
-              "CREATE TABLE sqlite_user(\n"
-              "  uname TEXT PRIMARY KEY,\n"
-              "  isAdmin BOOLEAN,\n"
-              "  pw BLOB\n"
-              ") WITHOUT ROWID;");
-    if( pStmt==0 ) return SQLITE_NOMEM;
-    sqlite3_step(pStmt);
-    rc = sqlite3_finalize(pStmt);
-    if( rc ) return rc;
-  }
-  pStmt = sqlite3UserAuthPrepare(db, 
-            "INSERT INTO sqlite_user(uname,isAdmin,pw)"
-            " VALUES(%Q,%d,sqlite_crypt(?1,NULL))",
-            zUsername, isAdmin!=0);
-  if( pStmt==0 ) return SQLITE_NOMEM;
-  sqlite3_bind_blob(pStmt, 1, aPW, nPW, SQLITE_STATIC);
-  sqlite3_step(pStmt);
-  rc = sqlite3_finalize(pStmt);
-  if( rc ) return rc;
-  if( db->auth.zAuthUser==0 ){
-    assert( isAdmin!=0 );
-    sqlite3_user_authenticate(db, zUsername, aPW, nPW);
-  }
-  return SQLITE_OK;
-}
-
-/*
-** The sqlite3_user_change() interface can be used to change a users
-** login credentials or admin privilege.  Any user can change their own
-** login credentials.  Only an admin user can change another users login
-** credentials or admin privilege setting.  No user may change their own 
-** admin privilege setting.
-*/
-int sqlite3_user_change(
-  sqlite3 *db,           /* Database connection */
-  const char *zUsername, /* Username to change */
-  const char *aPW,       /* Modified password or credentials */
-  int nPW,               /* Number of bytes in aPW[] */
-  int isAdmin            /* Modified admin privilege for the user */
-){
-  sqlite3_stmt *pStmt;
-  int rc;
-  u8 authLevel;
-
-  authLevel = db->auth.authLevel;
-  if( authLevel<UAUTH_User ){
-    /* Must be logged in to make a change */
-    return SQLITE_AUTH;
-  }
-  if( strcmp(db->auth.zAuthUser, zUsername)!=0 ){
-    if( db->auth.authLevel<UAUTH_Admin ){
-      /* Must be an administrator to change a different user */
-      return SQLITE_AUTH;
-    }
-  }else if( isAdmin!=(authLevel==UAUTH_Admin) ){
-    /* Cannot change the isAdmin setting for self */
-    return SQLITE_AUTH;
-  }
-  db->auth.authLevel = UAUTH_Admin;
-  if( !userTableExists(db, "main") ){
-    /* This routine is a no-op if the user to be modified does not exist */
-  }else{
-    pStmt = sqlite3UserAuthPrepare(db,
-              "UPDATE sqlite_user SET isAdmin=%d, pw=sqlite_crypt(?1,NULL)"
-              " WHERE uname=%Q", isAdmin, zUsername);
-    if( pStmt==0 ){
-      rc = SQLITE_NOMEM;
-    }else{
-      sqlite3_bind_blob(pStmt, 1, aPW, nPW, SQLITE_STATIC);
-      sqlite3_step(pStmt);
-      rc = sqlite3_finalize(pStmt);
-    }
-  }
-  db->auth.authLevel = authLevel;
-  return rc;
-}
-
-/*
-** The sqlite3_user_delete() interface can be used (by an admin user only)
-** to delete a user.  The currently logged-in user cannot be deleted,
-** which guarantees that there is always an admin user and hence that
-** the database cannot be converted into a no-authentication-required
-** database.
-*/
-int sqlite3_user_delete(
-  sqlite3 *db,           /* Database connection */
-  const char *zUsername  /* Username to remove */
-){
-  sqlite3_stmt *pStmt;
-  if( db->auth.authLevel<UAUTH_Admin ){
-    /* Must be an administrator to delete a user */
-    return SQLITE_AUTH;
-  }
-  if( strcmp(db->auth.zAuthUser, zUsername)==0 ){
-    /* Cannot delete self */
-    return SQLITE_AUTH;
-  }
-  if( !userTableExists(db, "main") ){
-    /* This routine is a no-op if the user to be deleted does not exist */
-    return SQLITE_OK;
-  }
-  pStmt = sqlite3UserAuthPrepare(db,
-              "DELETE FROM sqlite_user WHERE uname=%Q", zUsername);
-  if( pStmt==0 ) return SQLITE_NOMEM;
-  sqlite3_step(pStmt);
-  return sqlite3_finalize(pStmt);
-}
-
-#endif /* SQLITE_USER_AUTHENTICATION */