Index: openssl/demos/cms/cms_ddec.c |
=================================================================== |
--- openssl/demos/cms/cms_ddec.c (revision 0) |
+++ openssl/demos/cms/cms_ddec.c (revision 0) |
@@ -0,0 +1,89 @@ |
+/* S/MIME detached data decrypt example: rarely done but |
+ * should the need arise this is an 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, *dcont = NULL; |
+ X509 *rcert = NULL; |
+ EVP_PKEY *rkey = NULL; |
+ CMS_ContentInfo *cms = NULL; |
+ int ret = 1; |
+ |
+ OpenSSL_add_all_algorithms(); |
+ ERR_load_crypto_strings(); |
+ |
+ /* Read in recipient certificate and private key */ |
+ tbio = BIO_new_file("signer.pem", "r"); |
+ |
+ if (!tbio) |
+ goto err; |
+ |
+ rcert = PEM_read_bio_X509(tbio, NULL, 0, NULL); |
+ |
+ BIO_reset(tbio); |
+ |
+ rkey = PEM_read_bio_PrivateKey(tbio, NULL, 0, NULL); |
+ |
+ if (!rcert || !rkey) |
+ goto err; |
+ |
+ /* Open PEM file containing enveloped data */ |
+ |
+ in = BIO_new_file("smencr.pem", "r"); |
+ |
+ if (!in) |
+ goto err; |
+ |
+ /* Parse PEM content */ |
+ cms = PEM_read_bio_CMS(in, NULL, 0, NULL); |
+ |
+ if (!cms) |
+ goto err; |
+ |
+ /* Open file containing detached content */ |
+ dcont = BIO_new_file("smencr.out", "rb"); |
+ |
+ if (!in) |
+ goto err; |
+ |
+ out = BIO_new_file("encrout.txt", "w"); |
+ if (!out) |
+ goto err; |
+ |
+ /* Decrypt S/MIME message */ |
+ if (!CMS_decrypt(cms, rkey, rcert, dcont, out, 0)) |
+ goto err; |
+ |
+ ret = 0; |
+ |
+ err: |
+ |
+ if (ret) |
+ { |
+ fprintf(stderr, "Error Decrypting Data\n"); |
+ ERR_print_errors_fp(stderr); |
+ } |
+ |
+ if (cms) |
+ CMS_ContentInfo_free(cms); |
+ if (rcert) |
+ X509_free(rcert); |
+ if (rkey) |
+ EVP_PKEY_free(rkey); |
+ |
+ if (in) |
+ BIO_free(in); |
+ if (out) |
+ BIO_free(out); |
+ if (tbio) |
+ BIO_free(tbio); |
+ if (dcont) |
+ BIO_free(dcont); |
+ |
+ return ret; |
+ |
+ } |