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/*
* Copyright (c) 2018, [Ribose Inc](https://www.ribose.com).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <rnp/rnp.h>
#include <string.h>
#include <time.h>
#define RNP_SUCCESS 0
/* sample pass provider implementation, which always return 'password' */
static bool
example_pass_provider(rnp_ffi_t ffi,
void * app_ctx,
rnp_key_handle_t key,
const char * pgp_context,
char buf[],
size_t buf_len)
{
strncpy(buf, "password", buf_len);
return true;
}
static int
ffi_sign()
{
rnp_ffi_t ffi = NULL;
rnp_input_t keyfile = NULL;
rnp_input_t input = NULL;
rnp_output_t output = NULL;
rnp_op_sign_t sign = NULL;
rnp_key_handle_t key = NULL;
const char * message = "RNP signing sample message";
int result = 1;
/* initialize FFI object */
if (rnp_ffi_create(&ffi, "GPG", "GPG") != RNP_SUCCESS) {
return result;
}
/* load secret keyring, as it is required for signing. However, you may need to load public
* keyring as well to validate key's signatures. */
if (rnp_input_from_path(&keyfile, "secring.pgp") != RNP_SUCCESS) {
fprintf(stdout, "failed to open secring.pgp. Did you run ./generate sample?\n");
goto finish;
}
/* we may use RNP_LOAD_SAVE_SECRET_KEYS | RNP_LOAD_SAVE_PUBLIC_KEYS as well */
if (rnp_load_keys(ffi, "GPG", keyfile, RNP_LOAD_SAVE_SECRET_KEYS) != RNP_SUCCESS) {
fprintf(stdout, "failed to read secring.pgp\n");
goto finish;
}
rnp_input_destroy(keyfile);
keyfile = NULL;
/* set the password provider - we'll need password to unlock secret keys */
rnp_ffi_set_pass_provider(ffi, example_pass_provider, NULL);
/* create file input and memory output objects for the encrypted message and decrypted
* message */
if (rnp_input_from_memory(&input, (uint8_t *) message, strlen(message), false) !=
RNP_SUCCESS) {
fprintf(stdout, "failed to create input object\n");
goto finish;
}
if (rnp_output_to_path(&output, "signed.asc") != RNP_SUCCESS) {
fprintf(stdout, "failed to create output object\n");
goto finish;
}
/* initialize and configure sign operation, use
* rnp_op_sign_create_cleartext/rnp_op_sign_create_detached for cleartext or detached
* signature. */
if (rnp_op_sign_create(&sign, ffi, input, output) != RNP_SUCCESS) {
fprintf(stdout, "failed to create sign operation\n");
goto finish;
}
/* armor, file name, compression */
rnp_op_sign_set_armor(sign, true);
rnp_op_sign_set_file_name(sign, "message.txt");
rnp_op_sign_set_file_mtime(sign, time(NULL));
rnp_op_sign_set_compression(sign, "ZIP", 6);
/* signatures creation time - by default will be set to the current time as well */
rnp_op_sign_set_creation_time(sign, time(NULL));
/* signatures expiration time - by default will be 0, i.e. never expire */
rnp_op_sign_set_expiration_time(sign, 365 * 24 * 60 * 60);
/* set hash algorithm - should be compatible for all signatures */
rnp_op_sign_set_hash(sign, "SHA256");
/* now add signatures. First locate the signing key, then add and setup signature */
/* RSA signature */
if (rnp_locate_key(ffi, "userid", "rsa@key", &key) != RNP_SUCCESS) {
fprintf(stdout, "failed to locate signing key rsa@key.\n");
goto finish;
}
/* we do not need pointer to the signature so passing NULL as the last parameter */
if (rnp_op_sign_add_signature(sign, key, NULL) != RNP_SUCCESS) {
fprintf(stdout, "failed to add signature for key rsa@key.\n");
goto finish;
}
/* do not forget to destroy key handle */
rnp_key_handle_destroy(key);
key = NULL;
/* EdDSA signature */
if (rnp_locate_key(ffi, "userid", "25519@key", &key) != RNP_SUCCESS) {
fprintf(stdout, "failed to locate signing key 25519@key.\n");
goto finish;
}
if (rnp_op_sign_add_signature(sign, key, NULL) != RNP_SUCCESS) {
fprintf(stdout, "failed to add signature for key 25519@key.\n");
goto finish;
}
rnp_key_handle_destroy(key);
key = NULL;
/* finally do signing */
if (rnp_op_sign_execute(sign) != RNP_SUCCESS) {
fprintf(stdout, "failed to add signature for key 25519@key.\n");
goto finish;
}
fprintf(stdout, "Signing succeeded. See file signed.asc.\n");
result = 0;
finish:
rnp_input_destroy(keyfile);
rnp_key_handle_destroy(key);
rnp_op_sign_destroy(sign);
rnp_input_destroy(input);
rnp_output_destroy(output);
rnp_ffi_destroy(ffi);
return result;
}
int
main(int argc, char **argv)
{
return ffi_sign();
}
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