1 files changed, 89 insertions, 0 deletions

diff --git a/src/lib/libssl/src/demos/smime/smsign.c b/src/lib/libssl/src/demos/smime/smsign.c
new file mode 100644
index 0000000000..ba78830cff
--- /dev/null
+++ b/src/lib/libssl/src/demos/smime/smsign.c
@@ -0,0 +1,89 @@
+/* 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);
+                }
+
+        if (p7)
+                PKCS7_free(p7);
+        if (scert)
+                X509_free(scert);
+        if (skey)
+                EVP_PKEY_free(skey);
+
+        if (in)
+                BIO_free(in);
+        if (out)
+                BIO_free(out);
+        if (tbio)
+                BIO_free(tbio);
+
+        return ret;
+
+        }