diff --git a/fastbootd/secure.c b/fastbootd/secure.c
new file mode 100644
index 0000000..75a6f3c
--- /dev/null
+++ b/fastbootd/secure.c
@@ -0,0 +1,166 @@
+/*
+ * Copyright (c) 2009-2013, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  * Neither the name of Google, Inc. nor the names of its contributors
+ *    may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+
+#include <openssl/pem.h>
+#include <openssl/engine.h>
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#include <openssl/pem.h>
+#include <openssl/cms.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "secure.h"
+#include "debug.h"
+#include "utils.h"
+
+
+void cert_init_crypto() {
+    CRYPTO_malloc_init();
+    ERR_load_crypto_strings();
+    OpenSSL_add_all_algorithms();
+    ENGINE_load_builtin_engines();
+}
+
+X509_STORE *cert_store_from_path(const char *path) {
+
+    X509_STORE *store;
+    struct stat st;
+    X509_LOOKUP *lookup;
+
+    if (stat(path, &st)) {
+        D(ERR, "Unable to stat cert path");
+        goto error;
+    }
+
+    if (!(store = X509_STORE_new())) {
+        goto error;
+    }
+
+    if (S_ISDIR(st.st_mode)) {
+        lookup = X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir());
+        if (lookup == NULL)
+            goto error;
+        if (!X509_LOOKUP_add_dir(lookup, path, X509_FILETYPE_PEM)) {
+            D(ERR, "Error loading cert directory %s", path);
+            goto error;
+        }
+    }
+    else if(S_ISREG(st.st_mode)) {
+        lookup = X509_STORE_add_lookup(store,X509_LOOKUP_file());
+        if (lookup == NULL)
+            goto error;
+        if (!X509_LOOKUP_load_file(lookup, path, X509_FILETYPE_PEM)) {
+            D(ERR, "Error loading cert directory %s", path);
+            goto error;
+        }
+    }
+    else {
+        D(ERR, "cert path is not directory or regular file");
+        goto error;
+    }
+
+    return store;
+
+error:
+    return NULL;
+}
+
+
+int cert_read(int fd, CMS_ContentInfo **content, BIO **output) {
+    BIO *input;
+    *output = NULL;
+
+
+    input = BIO_new_fd(fd, BIO_NOCLOSE);
+    if (input == NULL) {
+        D(ERR, "Unable to open input");
+        goto error;
+    }
+
+    *content = SMIME_read_CMS(input, output);
+    if (*content == NULL) {
+        unsigned long err = ERR_peek_last_error();
+        D(ERR, "Unable to parse input file: %s", ERR_lib_error_string(err));
+        goto error_read;
+    }
+
+    BIO_free(input);
+
+    return 0;
+
+error_read:
+    BIO_free(input);
+error:
+    return 1;
+}
+
+int cert_verify(BIO *content, CMS_ContentInfo *content_info, X509_STORE *store, int *out_fd) {
+    BIO *output_temp;
+    int ret;
+
+    *out_fd = create_temp_file();
+    if (*out_fd < 0) {
+        D(ERR, "unable to create temporary file");
+        return -1;
+    }
+
+    output_temp = BIO_new_fd(*out_fd, BIO_NOCLOSE);
+    if (output_temp == NULL) {
+        D(ERR, "unable to create temporary bio");
+        close(*out_fd);
+        return -1;
+    }
+
+    ret = CMS_verify(content_info, NULL ,store, content, output_temp, 0);
+
+    if (ret == 0) {
+        char buf[256];
+        unsigned long err = ERR_peek_last_error();
+        D(ERR, "Verification failed with reason: %s, %s", ERR_lib_error_string(err),  ERR_error_string(err, buf));
+        D(ERR, "Data used: content %d", (int) content);
+    }
+
+    ERR_clear_error();
+    ERR_remove_state(0);
+
+    BIO_free(output_temp);
+
+    return ret;
+}
+
+void cert_release(BIO *content, CMS_ContentInfo *info) {
+    BIO_free(content);
+    CMS_ContentInfo_free(info);
+}
+