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.

See also StoreContext#chain.

error [R]

The error code set by the last call of verify.

See also StoreContext#error.

error_string [R]

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

See also StoreContext#error_string.

verify_callback [R]

The callback for additional certificate verification. It is invoked for each certificate in the chain and can be used to implement custom certificate verification conditions.

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 can use StoreContext#error= to change the error code as needed. The callback must return either true or false.

NOTE: any exception raised within the callback will be ignored.

See also the man page X509_STORE_CTX_set_verify_cb(3).

Public Class Methods

X509::Store.new → store

Creates a new X509::Store.

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

    GetX509Store(self, store);
    if (argc != 0)
        rb_warn("OpenSSL::X509::Store.new does not take any arguments");
#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);

    return self;
}

Public Instance Methods

add_cert(cert) → self

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

See also the man page X509_STORE_add_cert(3).

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, "X509_STORE_add_cert");

    return self;
}
add_crl(crl) → self

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

See also the man page X509_STORE_add_crl(3).

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, "X509_STORE_add_crl");

    return self;
}
add_file(file) → self

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.

See also the man page X509_LOOKUP_file(3).

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

    GetX509Store(self, store);
    path = StringValueCStr(file);
    lookup = X509_STORE_add_lookup(store, X509_LOOKUP_file());
    if (!lookup)
        ossl_raise(eX509StoreError, "X509_STORE_add_lookup");
    if (X509_LOOKUP_load_file(lookup, path, X509_FILETYPE_PEM) != 1)
        ossl_raise(eX509StoreError, "X509_LOOKUP_load_file");
#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

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

See also the man page X509_LOOKUP_hash_dir(3).

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

    GetX509Store(self, store);
    path = StringValueCStr(dir);
    lookup = X509_STORE_add_lookup(store, X509_LOOKUP_hash_dir());
    if (!lookup)
        ossl_raise(eX509StoreError, "X509_STORE_add_lookup");
    if (X509_LOOKUP_add_dir(lookup, path, X509_FILETYPE_PEM) != 1)
        ossl_raise(eX509StoreError, "X509_LOOKUP_add_dir");

    return self;
}
flags = flags

Sets the default flags used by certificate chain verification performed with the Store.

flags consists of zero or more of the constants defined in OpenSSL::X509 with name V_FLAG_* or’ed together.

OpenSSL::X509::StoreContext#flags= can be used to change the flags for a single verification operation.

See also the man page X509_VERIFY_PARAM_set_flags(3).

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

Sets the store’s default verification purpose. If specified, the verifications on the store will check every 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

OpenSSL::X509::StoreContext#purpose= can be used to change the value for a single verification operation.

See also the man page X509_VERIFY_PARAM_set_purpose(3).

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

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

See also the man page X509_STORE_set_default_paths(3).

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, "X509_STORE_set_default_paths");

    return Qnil;
}
time = time

Sets the time to be used in the certificate verifications with the store. By default, if not specified, the current system time is used.

OpenSSL::X509::StoreContext#time= can be used to change the value for a single verification operation.

See also the man page X509_VERIFY_PARAM_set_time(3).

static VALUE
ossl_x509store_set_time(VALUE self, VALUE time)
{
    X509_STORE *store;
    X509_VERIFY_PARAM *param;

    GetX509Store(self, store);
#ifdef HAVE_X509_STORE_GET0_PARAM
    param = X509_STORE_get0_param(store);
#else
    param = store->param;
#endif
    X509_VERIFY_PARAM_set_time(param, NUM2LONG(rb_Integer(time)));
    return time;
}
trust = trust

Sets the default trust settings used by the certificate verification with the store.

OpenSSL::X509::StoreContext#trust= can be used to change the value for a single verification operation.

See also the man page X509_VERIFY_PARAM_set_trust(3).

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

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)

General callback for OpenSSL verify

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

    GetX509Store(self, store);
    rb_iv_set(self, "@verify_callback", cb);
    // We don't need to trigger a write barrier because `rb_iv_set` did it.
    X509_STORE_set_ex_data(store, store_ex_verify_cb_idx, (void *)cb);

    return cb;
}