feat: support sslmode=verify-ca and sslmode=verify-full with sslrootcert for PostgreSQL

dbhub.toml.example

@@ -56,6 +56,18 @@ dsn = "postgres://postgres:postgres@localhost:5432/myapp"
 # aws_region = "eu-west-1"
 # sslmode = "require"
 
+# PostgreSQL with certificate verification (e.g., AWS RDS)
+# [[sources]]
+# id = "rds_pg_verified"
+# type = "postgres"
+# host = "mydb.abc123.eu-west-1.rds.amazonaws.com"
+# port = 5432
+# database = "myapp"
+# user = "app_user"
+# password = "secure_password"
+# sslmode = "verify-ca"
+# sslrootcert = "~/.ssl/rds-combined-ca-bundle.pem"
+
 # Production PostgreSQL (behind SSH bastion, lazy connection)
 # [[sources]]
 # id = "prod_pg"
@@ -323,8 +335,11 @@ dsn = "postgres://postgres:postgres@localhost:5432/myapp"
 #   ssh_keepalive_count_max (max missed keepalive responses, default: 3)
 #
 # SSL Mode (for network databases, not SQLite):
-#   sslmode = "disable"   # No SSL
-#   sslmode = "require"   # SSL without certificate verification
+#   sslmode = "disable"      # No SSL
+#   sslmode = "require"      # SSL without certificate verification
+#   sslmode = "verify-ca"    # SSL with CA certificate verification (PostgreSQL only)
+#   sslmode = "verify-full"  # SSL with CA + hostname verification (PostgreSQL only)
+#   sslrootcert = "~/.ssl/ca.pem"  # CA certificate path (requires verify-ca or verify-full)
 #
 # SQL Server Authentication:
 #   authentication = "ntlm"                              # Windows/NTLM auth (requires domain)

src/config/__tests__/toml-loader.test.ts

@@ -509,6 +509,172 @@ dsn = "postgres://user:pass@localhost:5432/testdb"
         expect(result).toBeTruthy();
         expect(result?.sources[0].sslmode).toBeUndefined();
       });
+
+      it('should accept sslmode = "verify-ca" for PostgreSQL', () => {
+        const tomlContent = `
+[[sources]]
+id = "test_db"
+type = "postgres"
+host = "localhost"
+database = "testdb"
+user = "user"
+password = "pass"
+sslmode = "verify-ca"
+`;
+        fs.writeFileSync(path.join(tempDir, 'dbhub.toml'), tomlContent);
+
+        const result = loadTomlConfig();
+
+        expect(result).toBeTruthy();
+        expect(result?.sources[0].sslmode).toBe('verify-ca');
+      });
+
+      it('should accept sslmode = "verify-full" for PostgreSQL', () => {
+        const tomlContent = `
+[[sources]]
+id = "test_db"
+type = "postgres"
+host = "localhost"
+database = "testdb"
+user = "user"
+password = "pass"
+sslmode = "verify-full"
+`;
+        fs.writeFileSync(path.join(tempDir, 'dbhub.toml'), tomlContent);
+
+        const result = loadTomlConfig();
+
+        expect(result).toBeTruthy();
+        expect(result?.sources[0].sslmode).toBe('verify-full');
+      });
+
+      it('should reject sslmode = "verify-ca" for MySQL', () => {
+        const tomlContent = `
+[[sources]]
+id = "test_db"
+type = "mysql"
+host = "localhost"
+database = "testdb"
+user = "user"
+password = "pass"
+sslmode = "verify-ca"
+`;
+        fs.writeFileSync(path.join(tempDir, 'dbhub.toml'), tomlContent);
+
+        expect(() => loadTomlConfig()).toThrow("sslmode 'verify-ca' which is only supported for PostgreSQL");
+      });
+
+      it('should reject sslmode = "verify-full" for MariaDB', () => {
+        const tomlContent = `
+[[sources]]
+id = "test_db"
+type = "mariadb"
+host = "localhost"
+database = "testdb"
+user = "user"
+password = "pass"
+sslmode = "verify-full"
+`;
+        fs.writeFileSync(path.join(tempDir, 'dbhub.toml'), tomlContent);
+
+        expect(() => loadTomlConfig()).toThrow("sslmode 'verify-full' which is only supported for PostgreSQL");
+      });
+
+      it('should reject sslmode = "verify-ca" for SQL Server', () => {
+        const tomlContent = `
+[[sources]]
+id = "test_db"
+type = "sqlserver"
+host = "localhost"
+database = "testdb"
+user = "user"
+password = "pass"
+sslmode = "verify-ca"
+`;
+        fs.writeFileSync(path.join(tempDir, 'dbhub.toml'), tomlContent);
+
+        expect(() => loadTomlConfig()).toThrow("sslmode 'verify-ca' which is only supported for PostgreSQL");
+      });
+
+      it('should reject sslrootcert when sslmode is "require"', () => {
+        const certPath = path.join(tempDir, 'ca.pem');
+        fs.writeFileSync(certPath, 'cert-content');
+
+        const tomlContent = `
+[[sources]]
+id = "test_db"
+type = "postgres"
+host = "localhost"
+database = "testdb"
+user = "user"
+password = "pass"
+sslmode = "require"
+sslrootcert = '${certPath}'
+`;
+        fs.writeFileSync(path.join(tempDir, 'dbhub.toml'), tomlContent);
+
+        expect(() => loadTomlConfig()).toThrow("sslrootcert requires sslmode 'verify-ca' or 'verify-full'");
+      });
+
+      it('should reject sslrootcert when sslmode is not set', () => {
+        const certPath = path.join(tempDir, 'ca.pem');
+        fs.writeFileSync(certPath, 'cert-content');
+
+        const tomlContent = `
+[[sources]]
+id = "test_db"
+type = "postgres"
+host = "localhost"
+database = "testdb"
+user = "user"
+password = "pass"
+sslrootcert = '${certPath}'
+`;
+        fs.writeFileSync(path.join(tempDir, 'dbhub.toml'), tomlContent);
+
+        expect(() => loadTomlConfig()).toThrow("sslrootcert requires sslmode 'verify-ca' or 'verify-full'");
+      });
+
+      it('should accept sslrootcert with sslmode = "verify-ca" when file exists', () => {
+        const certPath = path.join(tempDir, 'ca.pem');
+        fs.writeFileSync(certPath, 'cert-content');
+
+        const tomlContent = `
+[[sources]]
+id = "test_db"
+type = "postgres"
+host = "localhost"
+database = "testdb"
+user = "user"
+password = "pass"
+sslmode = "verify-ca"
+sslrootcert = '${certPath}'
+`;
+        fs.writeFileSync(path.join(tempDir, 'dbhub.toml'), tomlContent);
+
+        const result = loadTomlConfig();
+
+        expect(result).toBeTruthy();
+        expect(result?.sources[0].sslmode).toBe('verify-ca');
+        expect(result?.sources[0].sslrootcert).toBe(certPath);
+      });
+
+      it('should reject sslrootcert when file does not exist', () => {
+        const tomlContent = `
+[[sources]]
+id = "test_db"
+type = "postgres"
+host = "localhost"
+database = "testdb"
+user = "user"
+password = "pass"
+sslmode = "verify-ca"
+sslrootcert = "/nonexistent/ca.pem"
+`;
+        fs.writeFileSync(path.join(tempDir, 'dbhub.toml'), tomlContent);
+
+        expect(() => loadTomlConfig()).toThrow("sslrootcert file not found: '/nonexistent/ca.pem'");
+      });
     });
 
     describe('SQL Server authentication validation', () => {
@@ -978,6 +1144,41 @@ dsn = "postgres://user:pass@localhost:5432/testdb"
       expect(dsn).toBe('postgres://user:pass@localhost:5432/testdb?sslmode=require');
     });
 
+    it('should build PostgreSQL DSN with verify-ca and sslrootcert', () => {
+      const source: SourceConfig = {
+        id: 'pg_verify',
+        type: 'postgres',
+        host: 'rds.amazonaws.com',
+        port: 5432,
+        database: 'testdb',
+        user: 'user',
+        password: 'pass',
+        sslmode: 'verify-ca',
+        sslrootcert: '/path/to/ca-bundle.pem'
+      };
+
+      const dsn = buildDSNFromSource(source);
+
+      expect(dsn).toBe('postgres://user:pass@rds.amazonaws.com:5432/testdb?sslmode=verify-ca&sslrootcert=%2Fpath%2Fto%2Fca-bundle.pem');
+    });
+
+    it('should build PostgreSQL DSN with verify-full without sslrootcert', () => {
+      const source: SourceConfig = {
+        id: 'pg_verify_full',
+        type: 'postgres',
+        host: 'localhost',
+        port: 5432,
+        database: 'testdb',
+        user: 'user',
+        password: 'pass',
+        sslmode: 'verify-full'
+      };
+
+      const dsn = buildDSNFromSource(source);
+
+      expect(dsn).toBe('postgres://user:pass@localhost:5432/testdb?sslmode=verify-full');
+    });
+
     it('should build MySQL DSN with sslmode', () => {
       const source: SourceConfig = {
         id: 'mysql_ssl',

src/config/toml-loader.ts

@@ -324,21 +324,44 @@ function validateSourceConfig(source: SourceConfig, configPath: string): void {
 
   // Validate sslmode if provided
   if (source.sslmode !== undefined) {
-    // SQLite doesn't support SSL (local file-based database)
     if (source.type === "sqlite") {
       throw new Error(
         `Configuration file ${configPath}: source '${source.id}' has sslmode but SQLite does not support SSL. ` +
           `Remove the sslmode field for SQLite sources.`
       );
     }
 
-    const validSslModes = ["disable", "require"];
+    const validSslModes = ["disable", "require", "verify-ca", "verify-full"];
     if (!validSslModes.includes(source.sslmode)) {
       throw new Error(
         `Configuration file ${configPath}: source '${source.id}' has invalid sslmode '${source.sslmode}'. ` +
           `Valid values: ${validSslModes.join(", ")}`
       );
     }
+
+    if ((source.sslmode === "verify-ca" || source.sslmode === "verify-full") && source.type !== "postgres") {
+      throw new Error(
+        `Configuration file ${configPath}: source '${source.id}' has sslmode '${source.sslmode}' which is only supported for PostgreSQL. ` +
+          `Valid values for ${source.type}: disable, require`
+      );
+    }
+  }
+
+  // Validate sslrootcert if provided
+  if (source.sslrootcert !== undefined) {
+    if (source.sslmode !== "verify-ca" && source.sslmode !== "verify-full") {
+      throw new Error(
+        `Configuration file ${configPath}: source '${source.id}' has sslrootcert but sslmode is '${source.sslmode ?? "not set"}'. ` +
+          `sslrootcert requires sslmode 'verify-ca' or 'verify-full'`
+      );
+    }
+
+    const expandedPath = expandHomeDir(source.sslrootcert);
+    if (!fs.existsSync(expandedPath)) {
+      throw new Error(
+        `Configuration file ${configPath}: source '${source.id}' sslrootcert file not found: '${expandedPath}'`
+      );
+    }
   }
 
   // Validate SQL Server authentication options
@@ -437,6 +460,11 @@ function processSourceConfigs(
       processed.ssh_key = expandHomeDir(processed.ssh_key);
     }
 
+    // Expand ~ in sslrootcert path
+    if (processed.sslrootcert) {
+      processed.sslrootcert = expandHomeDir(processed.sslrootcert);
+    }
+
     // Expand ~ in SQLite database path (if relative)
     if (processed.type === "sqlite" && processed.database) {
       processed.database = expandHomeDir(processed.database);
@@ -596,6 +624,15 @@ export function buildDSNFromSource(source: SourceConfig): string {
     queryParams.push(`sslmode=${source.sslmode}`);
   }
 
+  if (
+    source.sslrootcert &&
+    source.type === "postgres" &&
+    (source.sslmode === "verify-ca" || source.sslmode === "verify-full")
+  ) {
+    const expandedCertPath = expandHomeDir(source.sslrootcert);
+    queryParams.push(`sslrootcert=${encodeURIComponent(expandedCertPath)}`);
+  }
+
   // Append query string if any params exist
   if (queryParams.length > 0) {
     dsn += `?${queryParams.join("&")}`;