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Diffstat (limited to 'openssl/demos/cms/cms_enc.c')
-rw-r--r--openssl/demos/cms/cms_enc.c92
1 files changed, 92 insertions, 0 deletions
diff --git a/openssl/demos/cms/cms_enc.c b/openssl/demos/cms/cms_enc.c
new file mode 100644
index 000000000..916b479d3
--- /dev/null
+++ b/openssl/demos/cms/cms_enc.c
@@ -0,0 +1,92 @@
+/* Simple S/MIME encrypt example */
+#include <openssl/pem.h>
+#include <openssl/cms.h>
+#include <openssl/err.h>
+
+int main(int argc, char **argv)
+ {
+ BIO *in = NULL, *out = NULL, *tbio = NULL;
+ X509 *rcert = NULL;
+ STACK_OF(X509) *recips = NULL;
+ CMS_ContentInfo *cms = NULL;
+ int ret = 1;
+
+ /*
+ * On OpenSSL 1.0.0 and later only:
+ * for streaming set CMS_STREAM
+ */
+ int flags = CMS_STREAM;
+
+ OpenSSL_add_all_algorithms();
+ ERR_load_crypto_strings();
+
+ /* Read in recipient certificate */
+ tbio = BIO_new_file("signer.pem", "r");
+
+ if (!tbio)
+ goto err;
+
+ rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL);
+
+ if (!rcert)
+ goto err;
+
+ /* Create recipient STACK and add recipient cert to it */
+ recips = sk_X509_new_null();
+
+ if (!recips || !sk_X509_push(recips, rcert))
+ goto err;
+
+ /* sk_X509_pop_free will free up recipient STACK and its contents
+ * so set rcert to NULL so it isn't freed up twice.
+ */
+ rcert = NULL;
+
+ /* Open content being encrypted */
+
+ in = BIO_new_file("encr.txt", "r");
+
+ if (!in)
+ goto err;
+
+ /* encrypt content */
+ cms = CMS_encrypt(recips, in, EVP_des_ede3_cbc(), flags);
+
+ if (!cms)
+ goto err;
+
+ out = BIO_new_file("smencr.txt", "w");
+ if (!out)
+ goto err;
+
+ /* Write out S/MIME message */
+ if (!SMIME_write_CMS(out, cms, in, flags))
+ goto err;
+
+ ret = 0;
+
+ err:
+
+ if (ret)
+ {
+ fprintf(stderr, "Error Encrypting Data\n");
+ ERR_print_errors_fp(stderr);
+ }
+
+ if (cms)
+ CMS_ContentInfo_free(cms);
+ if (rcert)
+ X509_free(rcert);
+ if (recips)
+ sk_X509_pop_free(recips, X509_free);
+
+ if (in)
+ BIO_free(in);
+ if (out)
+ BIO_free(out);
+ if (tbio)
+ BIO_free(tbio);
+
+ return ret;
+
+ }