diff --git a/composer.json b/composer.json
index 751b1fe..51b790c 100644
--- a/composer.json
+++ b/composer.json
@@ -4,7 +4,8 @@
   "type": "library",
   "require": {
     "ext-FFI": "*",
-    "php": "^7.4"
+    "php": "^7.4",
+    "ext-openssl": "*"
   },
   "require-dev": {
     "phpstan/phpstan": "^0.11.19",
diff --git a/resources/x509.h b/resources/x509.h
index 8c596d1..e72c646 100644
--- a/resources/x509.h
+++ b/resources/x509.h
@@ -234,6 +234,42 @@ struct stack_st_X509_CRL {
   _STACK stack;
 };
 
+typedef struct x509_lookup_st X509_LOOKUP;
+
+typedef struct x509_object_st
+ {
+
+ int type;
+ union {
+  char *ptr;
+  X509 *x509;
+  X509_CRL *crl;
+  EVP_PKEY *pkey;
+  } data;
+ } X509_OBJECT;
+
+struct stack_st_X509_LOOKUP { _STACK stack; };
+struct stack_st_X509_OBJECT { _STACK stack; };
+
+typedef struct x509_lookup_method_st {
+  const char *name;
+  int (*new_item)(X509_LOOKUP *ctx);
+  void (*free)(X509_LOOKUP *ctx);
+  int (*init)(X509_LOOKUP *ctx);
+  int (*shutdown)(X509_LOOKUP *ctx);
+  int (*ctrl)(X509_LOOKUP *ctx, int cmd, const char *argc, long argl,
+              char **ret);
+  int (*get_by_subject)(X509_LOOKUP *ctx, int type, X509_NAME *name,
+                        X509_OBJECT *ret);
+  int (*get_by_issuer_serial)(X509_LOOKUP *ctx, int type, X509_NAME *name,
+                              ASN1_INTEGER *serial, X509_OBJECT *ret);
+  int (*get_by_fingerprint)(X509_LOOKUP *ctx, int type,
+                            const unsigned char *bytes, int len,
+                            X509_OBJECT *ret);
+  int (*get_by_alias)(X509_LOOKUP *ctx, int type, const char *str, int len,
+                      X509_OBJECT *ret);
+} X509_LOOKUP_METHOD;
+
 X509 *X509_new(void);
 X509 *X509_dup(X509 *x509);
 void X509_free(X509 *a);
@@ -241,7 +277,13 @@ void X509_free(X509 *a);
 X509_STORE *X509_STORE_new(void);
 void X509_STORE_free(X509_STORE *v);
 
+X509_LOOKUP *X509_STORE_add_lookup(X509_STORE *v, X509_LOOKUP_METHOD *m);
+
 X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void);
-  X509_LOOKUP_METHOD *X509_LOOKUP_file(void);
+X509_LOOKUP_METHOD *X509_LOOKUP_file(void);
+X509_LOOKUP_METHOD *X509_LOOKUP_mem(void);
+
+int X509_load_cert_file(X509_LOOKUP *ctx, const char *file, int type);
 
-  int X509_load_cert_file(X509_LOOKUP *ctx, const char *file, int type);
\ No newline at end of file
+int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc,
+ long argl, char **ret);
\ No newline at end of file
diff --git a/src/OpenSSL.php b/src/OpenSSL.php
index 79b0a78..afa7a0b 100644
--- a/src/OpenSSL.php
+++ b/src/OpenSSL.php
@@ -5,6 +5,7 @@ namespace Cijber;
 
 use Cijber\OpenSSL\FFIWrapper;
 use Cijber\OpenSSL\Instance;
+use Cijber\OpenSSL\X509Store;
 use FFI;
 
 /**
@@ -71,6 +72,10 @@ class OpenSSL
 
     public static function CAStore()
     {
-        
+        if (static::$caStore === null) {
+            static::$caStore = X509Store::default();
+        }
+
+        return static::$caStore;
     }
 }
diff --git a/src/OpenSSL/PKCS7/Signed.php b/src/OpenSSL/PKCS7/Signed.php
index 432476d..6fe4c6c 100644
--- a/src/OpenSSL/PKCS7/Signed.php
+++ b/src/OpenSSL/PKCS7/Signed.php
@@ -5,18 +5,14 @@ namespace Cijber\OpenSSL\PKCS7;
 
 use Cijber\OpenSSL;
 use Cijber\OpenSSL\BIO;
-use Cijber\OpenSSL\PKCS7;
 use Cijber\OpenSSL\Stack\X509Stack;
 use Cijber\OpenSSL\X509Store;
-use FFI;
-use FFI\CData;
 
 class Signed
 {
     use Helpers;
 
 
-
     public function getCerts(): X509Stack
     {
 
@@ -25,14 +21,14 @@ class Signed
         return $stack;
     }
 
-    public function verify(string $plain, ?X509Store $x509Store = null)
+    public function verify(string $plain, int $flags, ?X509Store $x509Store = null)
     {
         if ($x509Store === null) {
             $x509Store = OpenSSL::CAStore();
         }
 
         $buffer = BIO::buffer($plain);
-        $x = $this->ffi->PKCS7_verify($this->parent, null, null, $buffer->getCData(), null, 0);
+        $x = $this->ffi->PKCS7_verify($this->parent, null, $x509Store->getCData(), $buffer->getCData(), null, $flags);
         return $x === 1;
     }
 }
diff --git a/src/OpenSSL/X509.php b/src/OpenSSL/X509.php
index 29cfbf9..fb8a2bb 100644
--- a/src/OpenSSL/X509.php
+++ b/src/OpenSSL/X509.php
@@ -9,6 +9,8 @@ use FFI;
 
 class X509 extends CBackedObjectWithOwner
 {
+    const FILETYPE_DEFAULT = 3;
+
     const TYPE = "X509*";
 
     public static function new(): X509
diff --git a/src/OpenSSL/X509Store.php b/src/OpenSSL/X509Store.php
index 3b73a3f..16b2bd2 100644
--- a/src/OpenSSL/X509Store.php
+++ b/src/OpenSSL/X509Store.php
@@ -15,6 +15,24 @@ class X509Store extends CBackedObjectWithOwner
         return new X509Store($ffi, $x509);
     }
 
+    public static function default(): X509Store
+    {
+        $store = X509Store::new();
+        $obj = $store->cObj;
+        $ffi = $store->ffi;
+        $lookup = $ffi->X509_STORE_add_lookup($obj, $ffi->X509_LOOKUP_file());
+        if ($lookup === null || !$ffi->X509_LOOKUP_ctrl($lookup, 1, null, X509::FILETYPE_DEFAULT, null)) {
+            throw new \RuntimeException("Couldn't load default CA files");
+        }
+
+        $lookup = $ffi->X509_STORE_add_lookup($obj, $ffi->X509_LOOKUP_hash_dir());
+        if ($lookup === null || !$ffi->X509_LOOKUP_ctrl($lookup, 2, null, X509::FILETYPE_DEFAULT, null)) {
+            throw new \RuntimeException("Couldn't load default CA files");
+        }
+
+        return $store;
+    }
+
     public function freeObject()
     {
         $this->ffi->X509_STORE_free($this->cObj);
diff --git a/tests/PKCS7Test.php b/tests/PKCS7Test.php
index f80237c..883805b 100644
--- a/tests/PKCS7Test.php
+++ b/tests/PKCS7Test.php
@@ -37,7 +37,8 @@ class PKCS7Test extends TestCase
         $plain = file_get_contents(__DIR__ . "/data/pkcs7/1.SF");
         $pkcs7 = PKCS7::loadFromDER($der);
         $signed = $pkcs7->asSigned();
-        $result = $signed->verify($plain);
+        $result = $signed->verify($plain, PKCS7_NOVERIFY);
+        $this->assertTrue($result);
     }
 
     public function testLoadingGarbageDER()