84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
/* Copyright (c) 2017, Google Inc.
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
|
|
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
|
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
|
|
|
|
#include <map>
|
|
#include <vector>
|
|
|
|
#include <openssl/bio.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/pem.h>
|
|
|
|
#include "internal.h"
|
|
|
|
|
|
static const struct argument kArguments[] = {
|
|
{"-key", kRequiredArgument, "The private key, in PEM format, to sign with"},
|
|
{"-digest", kOptionalArgument, "The digest algorithm to use"},
|
|
{"", kOptionalArgument, ""},
|
|
};
|
|
|
|
bool Sign(const std::vector<std::string> &args) {
|
|
std::map<std::string, std::string> args_map;
|
|
if (!ParseKeyValueArguments(&args_map, args, kArguments)) {
|
|
PrintUsage(kArguments);
|
|
return false;
|
|
}
|
|
|
|
// Load the private key.
|
|
bssl::UniquePtr<BIO> bio(BIO_new(BIO_s_file()));
|
|
if (!bio || !BIO_read_filename(bio.get(), args_map["-key"].c_str())) {
|
|
return false;
|
|
}
|
|
bssl::UniquePtr<EVP_PKEY> key(
|
|
PEM_read_bio_PrivateKey(bio.get(), nullptr, nullptr, nullptr));
|
|
if (!key) {
|
|
return false;
|
|
}
|
|
|
|
const EVP_MD *md = nullptr;
|
|
if (args_map.count("-digest")) {
|
|
md = EVP_get_digestbyname(args_map["-digest"].c_str());
|
|
if (md == nullptr) {
|
|
fprintf(stderr, "Unknown digest algorithm: %s\n",
|
|
args_map["-digest"].c_str());
|
|
return false;
|
|
}
|
|
}
|
|
|
|
bssl::ScopedEVP_MD_CTX ctx;
|
|
if (!EVP_DigestSignInit(ctx.get(), nullptr, md, nullptr, key.get())) {
|
|
return false;
|
|
}
|
|
|
|
std::vector<uint8_t> data;
|
|
if (!ReadAll(&data, stdin)) {
|
|
fprintf(stderr, "Error reading input.\n");
|
|
return false;
|
|
}
|
|
|
|
size_t sig_len = EVP_PKEY_size(key.get());
|
|
std::unique_ptr<uint8_t[]> sig(new uint8_t[sig_len]);
|
|
if (!EVP_DigestSign(ctx.get(), sig.get(), &sig_len, data.data(),
|
|
data.size())) {
|
|
return false;
|
|
}
|
|
|
|
if (fwrite(sig.get(), 1, sig_len, stdout) != sig_len) {
|
|
fprintf(stderr, "Error writing signature.\n");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|