Index: openssl/demos/cms/cms_enc.c |
=================================================================== |
--- openssl/demos/cms/cms_enc.c (revision 0) |
+++ openssl/demos/cms/cms_enc.c (revision 0) |
@@ -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; |
+ |
+ } |