Commit 17287562 authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Detached encrypt/decrypt example, fix decrypt sample.

parent a12a6b99

demos/cms/cms_ddec.c

0 → 100644
+89 −0
Original line number Diff line number Diff line 
/* 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;



	}

demos/cms/cms_dec.c

+4 −4
Original line number Diff line number Diff line
@@ -29,20 +29,20 @@ int main(int argc, char **argv) 
	if (!rcert || !rkey)

		goto err;



	/* Open content being signed */

	/* Open S/MIME message to decrypt */



	in = BIO_new_file("smencr.txt", "r");



	if (!in)

		goto err;



	/* Sign content */

	/* Parse message */

	cms = SMIME_read_CMS(in, NULL);



	if (!cms)

		goto err;



	out = BIO_new_file("encrout.txt", "w");

	out = BIO_new_file("decout.txt", "w");

	if (!out)

		goto err;
@@ -56,7 +56,7 @@ int main(int argc, char **argv) 


	if (ret)

		{

		fprintf(stderr, "Error Signing Data\n");

		fprintf(stderr, "Error Decrypting Data\n");

		ERR_print_errors_fp(stderr);

		}

demos/cms/cms_denc.c

0 → 100644
+97 −0
Original line number Diff line number Diff line 
/* S/MIME detached data encrypt 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, *dout = NULL;

	X509 *rcert = NULL;

	STACK_OF(X509) *recips = NULL;

	CMS_ContentInfo *cms = NULL;

	int ret = 1;



	int flags = CMS_STREAM|CMS_DETACHED;



	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");



	dout = BIO_new_file("smencr.out", "wb");



	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.pem", "w");

	if (!out)

		goto err;



	if (!CMS_final(cms, in, dout, flags))

		goto err;



	/* Write out CMS structure without content */

	if (!PEM_write_bio_CMS(out, cms))

		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 (dout)

		BIO_free(dout);

	if (tbio)

		BIO_free(tbio);



	return ret;



	}