Add integrity and global hash check to validation (#851)

Co-authored-by: rstanciu <[email protected]>

Cargo.toml

@@ -46,7 +46,7 @@ serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 serde_yaml = "0.9"
 spreet = { version = "0.8", default-features = false }
-sqlite-hashes = "0.2"
+sqlite-hashes = "0.3"
 sqlx = { version = "0.7", features = ["sqlite"] }
 subst = { version = "0.2", features = ["yaml"] }
 thiserror = "1"

martin-mbtiles/src/bin/main.rs

@@ -2,7 +2,9 @@ use std::path::{Path, PathBuf};
 
 use anyhow::Result;
 use clap::{Parser, Subcommand};
-use martin_mbtiles::{apply_mbtiles_diff, copy_mbtiles_file, Mbtiles, TileCopierOptions};
+use martin_mbtiles::{
+    apply_mbtiles_diff, copy_mbtiles_file, IntegrityCheck, Mbtiles, TileCopierOptions,
+};
 use sqlx::sqlite::SqliteConnectOptions;
 use sqlx::{Connection, SqliteConnection};
 
@@ -62,6 +64,12 @@ enum Commands {
     Validate {
         /// MBTiles file to validate
         file: PathBuf,
+        /// Value to specify the extent of the SQLite integrity check performed
+        #[arg(long, value_enum, default_value_t=IntegrityCheck::default())]
+        integrity_check: IntegrityCheck,
+        /// Generate a hash of the tile data hashes and store under the 'global_hash' key in metadata
+        #[arg(long)]
+        regenerate_global_hash: bool,
     },
 }
 
@@ -85,8 +93,12 @@ async fn main() -> Result<()> {
         } => {
             apply_mbtiles_diff(src_file, diff_file).await?;
         }
-        Commands::Validate { file } => {
-            validate_mbtiles(file.as_path()).await?;
+        Commands::Validate {
+            file,
+            integrity_check,
+            regenerate_global_hash,
+        } => {
+            validate_mbtiles(file.as_path(), integrity_check, regenerate_global_hash).await?;
         }
     }
 
@@ -111,11 +123,18 @@ async fn meta_set_value(file: &Path, key: &str, value: Option<String>) -> Result
     Ok(())
 }
 
-async fn validate_mbtiles(file: &Path) -> Result<()> {
+async fn validate_mbtiles(
+    file: &Path,
+    integrity_check: IntegrityCheck,
+    regenerate_global_hash: bool,
+) -> Result<()> {
     let mbt = Mbtiles::new(file)?;
     let opt = SqliteConnectOptions::new().filename(file).read_only(true);
     let mut conn = SqliteConnection::connect_with(&opt).await?;
-    mbt.validate_mbtiles(&mut conn).await?;
+    mbt.validate_mbtiles(integrity_check, &mut conn).await?;
+    if regenerate_global_hash {
+        mbt.generate_global_hash(&mut conn).await?;
+    }
     Ok(())
 }
 
@@ -127,8 +146,8 @@ mod tests {
     use clap::Parser;
     use martin_mbtiles::{CopyDuplicateMode, TileCopierOptions};
 
-    use crate::Args;
     use crate::Commands::{ApplyDiff, Copy, MetaGetValue, MetaSetValue, Validate};
+    use crate::{Args, IntegrityCheck};
 
     #[test]
     fn test_copy_no_arguments() {
@@ -407,6 +426,8 @@ mod tests {
                 verbose: false,
                 command: Validate {
                     file: PathBuf::from("src_file"),
+                    integrity_check: IntegrityCheck::Quick,
+                    regenerate_global_hash: false
                 }
             }
         );

martin-mbtiles/src/errors.rs

@@ -3,8 +3,6 @@ use std::path::PathBuf;
 use martin_tile_utils::TileInfo;
 use sqlite_hashes::rusqlite;
 
-use crate::mbtiles::MbtType;
-
 #[derive(thiserror::Error, Debug)]
 pub enum MbtError {
     #[error("SQL Error {0}")]
@@ -22,11 +20,14 @@ pub enum MbtError {
     #[error("Invalid data format for MBTile file {0}")]
     InvalidDataFormat(String),
 
+    #[error("Integrity check failed for MBTile file {0} for the following reasons: \n {1:?}")]
+    FailedIntegrityCheck(String, Vec<String>),
+
     #[error("Invalid tile data for MBTile file {0}")]
     InvalidTileData(String),
 
-    #[error("Incorrect data format for MBTile file {0}; expected {1:?} and got {2:?}")]
-    IncorrectDataFormat(String, &'static [MbtType], MbtType),
+    #[error("Expected global_hash value in metadata table for MBTiles file {0}")]
+    GlobalHashValueNotFound(String),
 
     #[error(r#"Filename "{0}" passed to SQLite must be valid UTF-8"#)]
     InvalidFilenameType(PathBuf),

martin-mbtiles/src/lib.rs

@@ -7,7 +7,7 @@ mod mbtiles_queries;
 mod tile_copier;
 
 pub use errors::MbtError;
-pub use mbtiles::{Mbtiles, Metadata};
+pub use mbtiles::{IntegrityCheck, Mbtiles, Metadata};
 pub use mbtiles_pool::MbtilesPool;
 pub use tile_copier::{
     apply_mbtiles_diff, copy_mbtiles_file, CopyDuplicateMode, TileCopierOptions,

martin-mbtiles/src/mbtiles.rs

@@ -16,14 +16,15 @@ use martin_tile_utils::{Format, TileInfo};
 use serde_json::{Value as JSONValue, Value};
 use sqlite_hashes::register_md5_function;
 use sqlite_hashes::rusqlite::Connection as RusqliteConnection;
+use sqlx::sqlite::SqliteRow;
 use sqlx::{query, Row, SqliteExecutor};
 use tilejson::{tilejson, Bounds, Center, TileJSON};
 
 use crate::errors::{MbtError, MbtResult};
 use crate::mbtiles_queries::{
     is_flat_tables_type, is_flat_with_hash_tables_type, is_normalized_tables_type,
 };
-use crate::MbtError::{IncorrectDataFormat, InvalidTileData};
+use crate::MbtError::{FailedIntegrityCheck, GlobalHashValueNotFound, InvalidTileData};
 
 #[derive(Clone, Debug, PartialEq)]
 pub struct Metadata {
@@ -42,6 +43,15 @@ pub enum MbtType {
     Normalized,
 }
 
+#[derive(PartialEq, Eq, Default, Debug, Clone)]
+#[cfg_attr(feature = "cli", derive(ValueEnum))]
+pub enum IntegrityCheck {
+    Full,
+    #[default]
+    Quick,
+    Off,
+}
+
 #[derive(Clone, Debug)]
 pub struct Mbtiles {
     filepath: String,
@@ -378,33 +388,102 @@ impl Mbtiles {
         Err(MbtError::NoUniquenessConstraint(self.filepath.clone()))
     }
 
-    pub async fn validate_mbtiles<T>(&self, conn: &mut T) -> MbtResult<()>
+    async fn get_global_hash<T>(&self, conn: &mut T) -> MbtResult<Option<String>>
     where
         for<'e> &'e mut T: SqliteExecutor<'e>,
     {
+        let rusqlite_conn = RusqliteConnection::open(Path::new(&self.filepath()))?;
+        register_md5_function(&rusqlite_conn)?;
         let mbttype = self.detect_type(&mut *conn).await?;
 
         let sql = match mbttype {
             MbtType::Flat => {
-                return Err(IncorrectDataFormat(
-                    self.filepath().to_string(),
-                    &[MbtType::FlatWithHash, MbtType::Normalized],
-                    MbtType::Flat,
-                ));
-            }
-            MbtType::FlatWithHash => {
-                "SELECT * FROM tiles_with_hash WHERE tile_hash!=hex(md5(tile_data)) LIMIT 1;"
+                println!("Cannot generate global hash, no hash column in flat table format. Skipping global_hash generation...");
+                return Ok(None);
             }
-            MbtType::Normalized => {
-                "SELECT * FROM images WHERE tile_id!=hex(md5(tile_data)) LIMIT 1;"
+            MbtType::FlatWithHash => "SELECT hex(md5_concat(cast(zoom_level AS text), cast(tile_column AS text), cast(tile_row AS text), tile_hash)) FROM tiles_with_hash ORDER BY zoom_level, tile_column, tile_row;",
+            MbtType::Normalized => "SELECT hex(md5_concat(cast(zoom_level AS text), cast(tile_column AS text), cast(tile_row AS text), tile_id)) FROM map ORDER BY zoom_level, tile_column, tile_row;"
+        };
+
+        Ok(Some(rusqlite_conn.query_row_and_then(sql, [], |row| {
+            row.get::<_, String>(0)
+        })?))
+    }
+
+    pub async fn generate_global_hash<T>(&self, conn: &mut T) -> MbtResult<()>
+    where
+        for<'e> &'e mut T: SqliteExecutor<'e>,
+    {
+        if let Some(global_hash) = self.get_global_hash(&mut *conn).await? {
+            self.set_metadata_value(conn, "global_hash", Some(global_hash))
+                .await
+        } else {
+            Ok(())
+        }
+    }
+
+    pub async fn validate_mbtiles<T>(
+        &self,
+        integrity_check: IntegrityCheck,
+        conn: &mut T,
+    ) -> MbtResult<()>
+    where
+        for<'e> &'e mut T: SqliteExecutor<'e>,
+    {
+        // SQLite Integrity check
+        if integrity_check != IntegrityCheck::Off {
+            let sql = if integrity_check == IntegrityCheck::Full {
+                "PRAGMA integrity_check;"
+            } else {
+                "PRAGMA quick_check;"
+            };
+
+            let result = query(sql)
+                .map(|row: SqliteRow| row.get::<String, _>(0))
+                .fetch_all(&mut *conn)
+                .await?;
+
+            if result.len() > 1
+                || result.get(0).ok_or(FailedIntegrityCheck(
+                    self.filepath().to_string(),
+                    vec!["SQLite could not perform integrity check".to_string()],
+                ))? != "ok"
+            {
+                return Err(FailedIntegrityCheck(self.filepath().to_string(), result));
             }
         }
-        .to_string();
+
+        let mbttype = self.detect_type(&mut *conn).await?;
+
+        if mbttype == MbtType::Flat {
+            println!(
+                "No hash column in flat table format, skipping hash-based validation steps..."
+            );
+            return Ok(());
+        }
 
         let rusqlite_conn = RusqliteConnection::open(Path::new(self.filepath()))?;
         register_md5_function(&rusqlite_conn)?;
 
-        if rusqlite_conn.prepare(&sql)?.exists(())? {
+        // Global hash check
+        if let Some(global_hash) = self.get_metadata_value(&mut *conn, "global_hash").await? {
+            if let Some(new_global_hash) = self.get_global_hash(&mut *conn).await? {
+                if global_hash != new_global_hash {
+                    return Err(InvalidTileData(self.filepath().to_string()));
+                }
+            }
+        } else {
+            return Err(GlobalHashValueNotFound(self.filepath().to_string()));
+        }
+
+        // Per-tile hash check
+        let sql = if mbttype == MbtType::FlatWithHash {
+            "SELECT 1 FROM tiles_with_hash WHERE tile_hash != hex(md5(tile_data)) LIMIT 1;"
+        } else {
+            "SELECT 1 FROM images WHERE tile_id != hex(md5(tile_data)) LIMIT 1;"
+        };
+
+        if rusqlite_conn.prepare(sql)?.exists(())? {
             return Err(InvalidTileData(self.filepath().to_string()));
         }
 
@@ -569,16 +648,24 @@ mod tests {
     async fn validate_valid_file() {
         let (mut conn, mbt) = open("../tests/fixtures/files/zoomed_world_cities.mbtiles").await;
 
-        mbt.validate_mbtiles(&mut conn).await.unwrap();
+        mbt.validate_mbtiles(IntegrityCheck::Quick, &mut conn)
+            .await
+            .unwrap();
     }
 
     #[actix_rt::test]
     async fn validate_invalid_file() {
         let (mut conn, mbt) =
             open("../tests/fixtures/files/invalid_zoomed_world_cities.mbtiles").await;
 
+        print!(
+            "VLAUE {:?}",
+            mbt.validate_mbtiles(IntegrityCheck::Quick, &mut conn).await
+        );
         assert!(matches!(
-            mbt.validate_mbtiles(&mut conn).await.unwrap_err(),
+            mbt.validate_mbtiles(IntegrityCheck::Quick, &mut conn)
+                .await
+                .unwrap_err(),
             MbtError::InvalidTileData(..)
         ));
     }

martin-mbtiles/src/tile_copier.rs

@@ -31,11 +31,11 @@ pub struct TileCopierOptions {
     src_file: PathBuf,
     /// MBTiles file to write to
     dst_file: PathBuf,
-    /// TODO: add documentation Output format of the destination file, ignored if the file exists. if not specified, defaults to the type of source
+    /// Output format of the destination file, ignored if the file exists. If not specified, defaults to the type of source
     #[cfg_attr(feature = "cli", arg(long, value_enum))]
     dst_mbttype: Option<MbtType>,
     /// Specify copying behaviour when tiles with duplicate (zoom_level, tile_column, tile_row) values are found
-    #[cfg_attr(feature = "cli", arg(long, value_enum, default_value_t = CopyDuplicateMode::Override))]
+    #[cfg_attr(feature = "cli", arg(long, value_enum, default_value_t = CopyDuplicateMode::default()))]
     on_duplicate: CopyDuplicateMode,
     /// Minimum zoom level to copy
     #[cfg_attr(feature = "cli", arg(long, conflicts_with("zoom_levels")))]
@@ -49,6 +49,9 @@ pub struct TileCopierOptions {
     /// Compare source file with this file, and only copy non-identical tiles to destination
     #[cfg_attr(feature = "cli", arg(long))]
     diff_with_file: Option<PathBuf>,
+    /// Skip generating a global hash for mbtiles validation. By default, if dst_mbttype is flat-with-hash or normalized, generate a global hash and store in the metadata table
+    #[cfg_attr(feature = "cli", arg(long))]
+    skip_global_hash: bool,
 }
 
 #[cfg(feature = "cli")]
@@ -101,6 +104,7 @@ impl TileCopierOptions {
             min_zoom: None,
             max_zoom: None,
             diff_with_file: None,
+            skip_global_hash: false,
         }
     }
 
@@ -133,6 +137,11 @@ impl TileCopierOptions {
         self.diff_with_file = Some(diff_with_file);
         self
     }
+
+    pub fn skip_global_hash(mut self, skip_global_hash: bool) -> Self {
+        self.skip_global_hash = skip_global_hash;
+        self
+    }
 }
 
 impl TileCopier {
@@ -226,6 +235,12 @@ impl TileCopier {
             }
         };
 
+        if !self.options.skip_global_hash
+            && (dst_mbttype == FlatWithHash || dst_mbttype == Normalized)
+        {
+            self.dst_mbtiles.generate_global_hash(&mut conn).await?;
+        }
+
         Ok(conn)
     }