zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libssl/openssl-1.1.1o/demos/smime/smsign.c b/ap/lib/libssl/openssl-1.1.1o/demos/smime/smsign.c
new file mode 100644
index 0000000..ba0adb3
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/demos/smime/smsign.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2007-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+/* Simple S/MIME signing example */
+#include <openssl/pem.h>
+#include <openssl/pkcs7.h>
+#include <openssl/err.h>
+
+int main(int argc, char **argv)
+{
+ BIO *in = NULL, *out = NULL, *tbio = NULL;
+ X509 *scert = NULL;
+ EVP_PKEY *skey = NULL;
+ PKCS7 *p7 = NULL;
+ int ret = 1;
+
+ /*
+ * For simple S/MIME signing use PKCS7_DETACHED. On OpenSSL 0.9.9 only:
+ * for streaming detached set PKCS7_DETACHED|PKCS7_STREAM for streaming
+ * non-detached set PKCS7_STREAM
+ */
+ int flags = PKCS7_DETACHED | PKCS7_STREAM;
+
+ OpenSSL_add_all_algorithms();
+ ERR_load_crypto_strings();
+
+ /* Read in signer certificate and private key */
+ tbio = BIO_new_file("signer.pem", "r");
+
+ if (!tbio)
+ goto err;
+
+ scert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
+
+ BIO_reset(tbio);
+
+ skey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL);
+
+ if (!scert || !skey)
+ goto err;
+
+ /* Open content being signed */
+
+ in = BIO_new_file("sign.txt", "r");
+
+ if (!in)
+ goto err;
+
+ /* Sign content */
+ p7 = PKCS7_sign(scert, skey, NULL, in, flags);
+
+ if (!p7)
+ goto err;
+
+ out = BIO_new_file("smout.txt", "w");
+ if (!out)
+ goto err;
+
+ if (!(flags & PKCS7_STREAM))
+ BIO_reset(in);
+
+ /* Write out S/MIME message */
+ if (!SMIME_write_PKCS7(out, p7, in, flags))
+ goto err;
+
+ ret = 0;
+
+ err:
+ if (ret) {
+ fprintf(stderr, "Error Signing Data\n");
+ ERR_print_errors_fp(stderr);
+ }
+ PKCS7_free(p7);
+ X509_free(scert);
+ EVP_PKEY_free(skey);
+ BIO_free(in);
+ BIO_free(out);
+ BIO_free(tbio);
+
+ return ret;
+
+}