Fix SQLCipher subspec

Author: jberkel

Sources/SQLite/Core/Blob.swift

@@ -27,8 +27,8 @@ public final class Blob {
 
     public let data: NSData
 
-    public var bytes: UnsafeRawPointer {
-        data.bytes
+    public var bytes: UnsafePointer<UInt8> {
+        data.bytes.assumingMemoryBound(to: UInt8.self)
     }
 
     public var length: Int {
@@ -64,7 +64,6 @@ public final class Blob {
 
     public func toHex() -> String {
         guard length > 0 else { return "" }
-        let bytes = bytes.assumingMemoryBound(to: UInt8.self)
 
         var hex = ""
         for idx in 0..<length {

Sources/SQLite/Extensions/Cipher.swift

@@ -32,7 +32,7 @@ extension Connection {
     }
 
     public func key(_ key: Blob, db: String = "main") throws {
-        try _key_v2(db: db, keyPointer: key.bytes, keySize: key.bytes.count)
+        try _key_v2(db: db, keyPointer: key.bytes, keySize: key.length)
     }
 
     /// Same as `key(_ key: String, db: String = "main")`, running "PRAGMA cipher_migrate;"
@@ -53,7 +53,7 @@ extension Connection {
 
     /// Same as `[`keyAndMigrate(_ key: String, db: String = "main")` accepting byte array as key
     public func keyAndMigrate(_ key: Blob, db: String = "main") throws {
-        try _key_v2(db: db, keyPointer: key.bytes, keySize: key.bytes.count, migrate: true)
+        try _key_v2(db: db, keyPointer: key.bytes, keySize: key.length, migrate: true)
     }
 
     /// Change the key on an open database. NB: only works if the database is already encrypted.
@@ -68,7 +68,7 @@ extension Connection {
     }
 
     public func rekey(_ key: Blob, db: String = "main") throws {
-        try _rekey_v2(db: db, keyPointer: key.bytes, keySize: key.bytes.count)
+        try _rekey_v2(db: db, keyPointer: key.bytes, keySize: key.length)
     }
 
     /// Converts a non-encrypted database to an encrypted one.

Tests/SQLiteTests/Core/BlobTests.swift

@@ -34,4 +34,8 @@ class BlobTests: XCTestCase {
         XCTAssertEqual(blob1, blob2)
         XCTAssertNotEqual(blob1, blob3)
     }
+
+    func XXX_test_init_with_mutable_data_fails() {
+        _ = Blob(data: NSMutableData())
+    }
 }