# class OpenSSL::X509::Store

The `X509` certificate store holds trusted CA certificates used to verify peer certificates.

The easiest way to create a useful certificate store is:

    cert_store = OpenSSL::X509::Store.new
    cert_store.set_default_paths

This will use your system's built-in certificates.

If your system does not have a default set of certificates you can obtain a set extracted from Mozilla CA certificate store by cURL maintainers here: curl.haxx.se/docs/caextract.html (You may wish to use the firefox-db2pem.sh script to extract the certificates from a local install to avoid man-in-the-middle attacks.)

After downloading or generating a cacert.pem from the above link you can create a certificate store from the pem file like this:

    cert_store = OpenSSL::X509::Store.new
    cert_store.add_file 'cacert.pem'

The certificate store can be used with an SSLSocket like this:

    ssl_context = OpenSSL::SSL::SSLContext.new
    ssl_context.verify_mode = OpenSSL::SSL::VERIFY_PEER
    ssl_context.cert_store = cert_store

    tcp_socket = TCPSocket.open 'example.com', 443

    ssl_socket = OpenSSL::SSL::SSLSocket.new tcp_socket, ssl_context

### Attributes

chain[R]

The certificate chain constructed by the last call of `verify`.

error[R]

The error code set by the last call of `verify`.

error_string[R]

The description for the error code set by the last call of `verify`.

verify_callback[R]

The callback for additional certificate verification. It is invoked for each untrusted certificate in the chain.

The callback is invoked with two values, a boolean that indicates if the pre-verification by `OpenSSL` has succeeded or not, and the `StoreContext` in use. The callback must return either true or false.

### Public Class Methods

X509::Store.new → store click to toggle source

Creates a new `X509::Store`.

    static VALUE
    ossl_x509store_initialize(int argc, VALUE *argv, VALUE self)
    {
        X509_STORE *store;

    /* BUG: This method takes any number of arguments but appears to ignore them. */
        GetX509Store(self, store);
    #if !defined(HAVE_OPAQUE_OPENSSL)
        /* [Bug #405] [Bug #1678] [Bug #3000]; already fixed? */
        store->ex_data.sk = NULL;
    #endif
        X509_STORE_set_verify_cb(store, x509store_verify_cb);
        ossl_x509store_set_vfy_cb(self, Qnil);

        /* last verification status */
        rb_iv_set(self, "@error", Qnil);
        rb_iv_set(self, "@error_string", Qnil);
        rb_iv_set(self, "@chain", Qnil);
        rb_iv_set(self, "@time", Qnil);

        return self;
    }

### Public Instance Methods

add_cert(cert) click to toggle source

Adds the `OpenSSL::X509::Certificate` cert to the certificate store.

    static VALUE
    ossl_x509store_add_cert(VALUE self, VALUE arg)
    {
        X509_STORE *store;
        X509 *cert;

        cert = GetX509CertPtr(arg); /* NO NEED TO DUP */
        GetX509Store(self, store);
        if (X509_STORE_add_cert(store, cert) != 1){
            ossl_raise(eX509StoreError, NULL);
        }

        return self;
    }

add_crl(crl) → self click to toggle source

Adds the `OpenSSL::X509::CRL` crl to the store.

    static VALUE
    ossl_x509store_add_crl(VALUE self, VALUE arg)
    {
        X509_STORE *store;
        X509_CRL *crl;

        crl = GetX509CRLPtr(arg); /* NO NEED TO DUP */
        GetX509Store(self, store);
        if (X509_STORE_add_crl(store, crl) != 1){
            ossl_raise(eX509StoreError, NULL);
        }

        return self;
    }

add_file(file) → self click to toggle source

Adds the certificates in file to the certificate store. file is the path to the file, and the file contains one or more certificates in PEM format concatenated together.

    static VALUE
    ossl_x509store_add_file(VALUE self, VALUE file)
    {
        X509_STORE *store;
        X509_LOOKUP *lookup;
        char *path = NULL;

        if(file != Qnil){
            rb_check_safe_obj(file);
            path = StringValueCStr(file);
        }
        GetX509Store(self, store);
        lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
        if(lookup == NULL) ossl_raise(eX509StoreError, NULL);
        if(X509_LOOKUP_load_file(lookup, path, X509_FILETYPE_PEM) != 1){
            ossl_raise(eX509StoreError, NULL);
        }
    #if OPENSSL_VERSION_NUMBER < 0x10101000 || defined(LIBRESSL_VERSION_NUMBER)
        /*
         * X509_load_cert_crl_file() which is called from X509_LOOKUP_load_file()
         * did not check the return value of X509_STORE_add_{cert,crl}(), leaking
         * "cert already in hash table" errors on the error queue, if duplicate
         * certificates are found. This will be fixed by OpenSSL 1.1.1.
         */
        ossl_clear_error();
    #endif

        return self;
    }

add_path(path) → self click to toggle source

Adds path as the hash dir to be looked up by the store.

    static VALUE
    ossl_x509store_add_path(VALUE self, VALUE dir)
    {
        X509_STORE *store;
        X509_LOOKUP *lookup;
        char *path = NULL;

        if(dir != Qnil){
            rb_check_safe_obj(dir);
            path = StringValueCStr(dir);
        }
        GetX509Store(self, store);
        lookup = X509_STORE_add_lookup(store, X509_LOOKUP_hash_dir());
        if(lookup == NULL) ossl_raise(eX509StoreError, NULL);
        if(X509_LOOKUP_add_dir(lookup, path, X509_FILETYPE_PEM) != 1){
            ossl_raise(eX509StoreError, NULL);
        }

        return self;
    }

flags = flags click to toggle source

Sets flags to the `Store`. flags consists of zero or more of the constants defined in with name V_FLAG_* or'ed together.

    static VALUE
    ossl_x509store_set_flags(VALUE self, VALUE flags)
    {
        X509_STORE *store;
        long f = NUM2LONG(flags);

        GetX509Store(self, store);
        X509_STORE_set_flags(store, f);

        return flags;
    }

purpose = purpose click to toggle source

Sets the store's purpose to purpose. If specified, the verifications on the store will check every untrusted certificate's extensions are consistent with the purpose. The purpose is specified by constants:

- X509::PURPOSE_SSL_CLIENT

- X509::PURPOSE_SSL_SERVER

- X509::PURPOSE_NS_SSL_SERVER

- X509::PURPOSE_SMIME_SIGN

- X509::PURPOSE_SMIME_ENCRYPT

- X509::PURPOSE_CRL_SIGN

- X509::PURPOSE_ANY

- X509::PURPOSE_OCSP_HELPER

- X509::PURPOSE_TIMESTAMP_SIGN

    static VALUE
    ossl_x509store_set_purpose(VALUE self, VALUE purpose)
    {
        X509_STORE *store;
        int p = NUM2INT(purpose);

        GetX509Store(self, store);
        X509_STORE_set_purpose(store, p);

        return purpose;
    }

set_default_paths click to toggle source

Configures store to look up CA certificates from the system default certificate store as needed basis. The location of the store can usually be determined by:

- OpenSSL::X509::DEFAULT_CERT_FILE

- OpenSSL::X509::DEFAULT_CERT_DIR

    static VALUE
    ossl_x509store_set_default_paths(VALUE self)
    {
        X509_STORE *store;

        GetX509Store(self, store);
        if (X509_STORE_set_default_paths(store) != 1){
            ossl_raise(eX509StoreError, NULL);
        }

        return Qnil;
    }

time = time click to toggle source

Sets the time to be used in verifications.

    static VALUE
    ossl_x509store_set_time(VALUE self, VALUE time)
    {
        rb_iv_set(self, "@time", time);
        return time;
    }

trust = trust click to toggle source

    static VALUE
    ossl_x509store_set_trust(VALUE self, VALUE trust)
    {
        X509_STORE *store;
        int t = NUM2INT(trust);

        GetX509Store(self, store);
        X509_STORE_set_trust(store, t);

        return trust;
    }

verify(cert, chain = nil) → true | false click to toggle source

Performs a certificate verification on the `OpenSSL::X509::Certificate` cert.

chain can be an array of `OpenSSL::X509::Certificate` that is used to construct the certificate chain.

If a block is given, it overrides the callback set by `verify_callback=`.

After finishing the verification, the error information can be retrieved by `error`, `error_string`, and the resulting complete certificate chain can be retrieved by `chain`.

    static VALUE
    ossl_x509store_verify(int argc, VALUE *argv, VALUE self)
    {
        VALUE cert, chain;
        VALUE ctx, proc, result;

        rb_scan_args(argc, argv, "11", &cert, &chain);
        ctx = rb_funcall(cX509StoreContext, rb_intern("new"), 3, self, cert, chain);
        proc = rb_block_given_p() ?  rb_block_proc() :
               rb_iv_get(self, "@verify_callback");
        rb_iv_set(ctx, "@verify_callback", proc);
        result = rb_funcall(ctx, rb_intern("verify"), 0);

        rb_iv_set(self, "@error", ossl_x509stctx_get_err(ctx));
        rb_iv_set(self, "@error_string", ossl_x509stctx_get_err_string(ctx));
        rb_iv_set(self, "@chain", ossl_x509stctx_get_chain(ctx));

        return result;
    }

verify_callback=(p1) click to toggle source

General callback for `OpenSSL` verify

    static VALUE
    ossl_x509store_set_vfy_cb(VALUE self, VALUE cb)
    {
        X509_STORE *store;

        GetX509Store(self, store);
        X509_STORE_set_ex_data(store, store_ex_verify_cb_idx, (void *)cb);
        rb_iv_set(self, "@verify_callback", cb);

        return cb;
    }