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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>
#define RNP_SUCCESS 0
/* example key provider which loads key from file based on its keyid */
static void
example_key_provider(rnp_ffi_t ffi,
void * app_ctx,
const char *identifier_type,
const char *identifier,
bool secret)
{
rnp_input_t input = NULL;
char filename[32] = {0};
if (strcmp(identifier_type, "keyid")) {
if (strcmp(identifier_type, "fingerprint")) {
fprintf(stdout, "Unsupported key search: %s = %s\n", identifier_type, identifier);
return;
}
/* if we search by fp then keyid is last 16 chars */
if (strlen(identifier) < 40) {
fprintf(stdout, "Invalid fingerprint: %s\n", identifier);
return;
}
identifier += 24;
}
snprintf(filename, sizeof(filename), "key-%s-%s.asc", identifier, secret ? "sec" : "pub");
if (rnp_input_from_path(&input, filename) != RNP_SUCCESS) {
fprintf(stdout, "failed to open key file %s\n", filename);
return;
}
if (rnp_load_keys(
ffi, "GPG", input, RNP_LOAD_SAVE_SECRET_KEYS | RNP_LOAD_SAVE_PUBLIC_KEYS) !=
RNP_SUCCESS) {
fprintf(stdout, "failed to load key from file %s\n", filename);
}
rnp_input_destroy(input);
}
static int
ffi_verify()
{
rnp_ffi_t ffi = NULL;
rnp_op_verify_t verify = NULL;
rnp_input_t input = NULL;
rnp_output_t output = NULL;
uint8_t * buf = NULL;
size_t buf_len = 0;
size_t sigcount = 0;
int result = 1;
/* initialize FFI object */
if (rnp_ffi_create(&ffi, "GPG", "GPG") != RNP_SUCCESS) {
return result;
}
/* we do not load any keys here since we'll use key provider */
rnp_ffi_set_key_provider(ffi, example_key_provider, NULL);
/* create file input and memory output objects for the signed message and verified
* message */
if (rnp_input_from_path(&input, "signed.asc") != RNP_SUCCESS) {
fprintf(stdout, "failed to open file 'signed.asc'. Did you run the sign example?\n");
goto finish;
}
if (rnp_output_to_memory(&output, 0) != RNP_SUCCESS) {
fprintf(stdout, "failed to create output object\n");
goto finish;
}
if (rnp_op_verify_create(&verify, ffi, input, output) != RNP_SUCCESS) {
fprintf(stdout, "failed to create verification context\n");
goto finish;
}
if (rnp_op_verify_execute(verify) != RNP_SUCCESS) {
fprintf(stdout, "failed to execute verification operation\n");
goto finish;
}
/* now check signatures and get some info about them */
if (rnp_op_verify_get_signature_count(verify, &sigcount) != RNP_SUCCESS) {
fprintf(stdout, "failed to get signature count\n");
goto finish;
}
for (size_t i = 0; i < sigcount; i++) {
rnp_op_verify_signature_t sig = NULL;
rnp_result_t sigstatus = RNP_SUCCESS;
rnp_key_handle_t key = NULL;
char * keyid = NULL;
if (rnp_op_verify_get_signature_at(verify, i, &sig) != RNP_SUCCESS) {
fprintf(stdout, "failed to get signature %d\n", (int) i);
goto finish;
}
if (rnp_op_verify_signature_get_key(sig, &key) != RNP_SUCCESS) {
fprintf(stdout, "failed to get signature's %d key\n", (int) i);
goto finish;
}
if (rnp_key_get_keyid(key, &keyid) != RNP_SUCCESS) {
fprintf(stdout, "failed to get key id %d\n", (int) i);
rnp_key_handle_destroy(key);
goto finish;
}
sigstatus = rnp_op_verify_signature_get_status(sig);
fprintf(stdout, "Status for signature from key %s : %d\n", keyid, (int) sigstatus);
rnp_buffer_destroy(keyid);
rnp_key_handle_destroy(key);
}
/* get the verified message from the output structure */
if (rnp_output_memory_get_buf(output, &buf, &buf_len, false) != RNP_SUCCESS) {
goto finish;
}
fprintf(stdout, "Verified message:\n%.*s\n", (int) buf_len, buf);
result = 0;
finish:
rnp_op_verify_destroy(verify);
rnp_input_destroy(input);
rnp_output_destroy(output);
rnp_ffi_destroy(ffi);
return result;
}
int
main(int argc, char **argv)
{
return ffi_verify();
}
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