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451 lines
12 KiB
451 lines
12 KiB
#include "px5g-openssl.hpp"
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#include <array>
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#include <iostream>
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#include <string>
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#include <string_view>
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#include <unistd.h>
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class argv_view { // TODO(pst): use std::span when available.
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private:
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std::basic_string_view<const char *> data;
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public:
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argv_view(const argv_view &) = delete;
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argv_view(argv_view &&) = delete;
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auto operator=(const argv_view &) -> argv_view & = delete;
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auto operator=(argv_view &&) -> argv_view & = delete;
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argv_view(const char ** argv, int argc) :
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data{argv, static_cast<size_t>(argc)} {}
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inline auto operator[] (size_t pos) const -> std::string_view
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{ return std::string_view{data[pos]}; }
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[[nodiscard]] inline constexpr auto size() const noexcept -> size_t
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{ return data.size(); }
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~argv_view() = default;
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};
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static const auto default_validity = 30;
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auto checkend(const argv_view & argv) -> int;
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void eckey(const argv_view & argv);
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void rsakey(const argv_view & argv);
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void selfsigned(const argv_view & argv);
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inline auto parse_int(const std::string_view & arg) -> int
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{
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size_t pos;
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int ret = stoi(std::string{arg}, &pos);
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if (pos < arg.size()) {
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throw std::runtime_error("number has trailing char");
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}
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return ret;
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}
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inline auto parse_curve(const std::string_view & name) -> int
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{
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if (name=="P-384") { return NID_secp384r1; }
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if (name=="P-521") { return NID_secp521r1; }
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if (name=="P-256" || name=="secp256r1") { return NID_X9_62_prime256v1; }
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if (name=="secp192r1") { return NID_X9_62_prime192v1; }
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return OBJ_sn2nid(name.data());
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// not: if (curve == 0) { curve = EC_curve_nist2nid(name.c_str()); }
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}
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auto checkend(const argv_view & argv) -> int
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{
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bool use_pem = true;
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std::string crtpath{};
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time_t seconds = 0;
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for (size_t i=2; i<argv.size(); ++i) {
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if (argv[i]=="-der") {
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use_pem = false;
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} else if (argv[i]=="-in") {
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++i;
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if (i >= argv.size()) {
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throw std::runtime_error("checkend error: -in misses filename");
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}
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if (!crtpath.empty()) {
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if (argv[i] == crtpath) {
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std::cerr<<"checkend warning: repeated same -in file\n";
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} else {
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throw std::runtime_error
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("checkend error: more than one -in file");
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}
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}
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crtpath = argv[i];
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}
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else if (argv[i][0]=='-') {
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std::cerr<<"checkend warning: skipping option "<<argv[i]<<std::endl;
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} else { // main option:
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intmax_t num = 0;
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try {
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num = parse_int(argv[i]);
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} catch (...) {
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auto errmsg = std::string{"checkend error: invalid time "};
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errmsg += argv[i];
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std::throw_with_nested(std::runtime_error(errmsg));
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}
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seconds = static_cast<time_t>(num);
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if (num!=static_cast<intmax_t>(seconds)) {
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auto errmsg = std::string{"checkend error: time too big "};
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errmsg += argv[i];
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throw std::runtime_error(errmsg);
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}
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}
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}
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bool valid = checkend(crtpath, seconds, use_pem);
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std::cout<<"Certificate will"<<(valid ? " not " : " ")<<"expire"<<std::endl;
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return (valid ? 0 : 1);
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}
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void eckey(const argv_view & argv)
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{
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bool has_main_option = false;
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bool use_pem = true;
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std::string keypath{};
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int curve = NID_X9_62_prime256v1;
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for (size_t i=2; i < argv.size(); ++i) {
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if (argv[i]=="-der") {
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use_pem = false;
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} else if (argv[i]=="-out") {
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++i;
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if (i >= argv.size()) {
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throw std::runtime_error("eckey error: -out misses filename");
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}
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if (!keypath.empty()) {
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if (argv[i]==keypath) {
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std::cerr<<"eckey warning: repeated same -out file\n";
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} else {
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throw std::runtime_error
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("eckey error: more than one -out file");
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}
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}
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keypath = argv[i];
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}
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else if (argv[i][0]=='-') {
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std::cerr<<"eckey warning: skipping option "<<argv[i]<<std::endl;
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} else { //main option:
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if (has_main_option) {
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throw std::runtime_error
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("eckey error: more than one main option");
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} //else:
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has_main_option = true;
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curve = parse_curve(argv[i]);
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}
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}
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write_key(gen_eckey(curve), keypath, use_pem);
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}
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void rsakey(const argv_view & argv)
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{
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bool has_main_option = false;
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bool use_pem = true;
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std::string keypath{};
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BN_ULONG exponent = RSA_F4;
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int keysize = rsa_min_modulus_bits;
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for (size_t i=2; i < argv.size(); ++i) {
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if (argv[i]=="-der") {
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use_pem = false;
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} else if (argv[i]=="-3") {
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exponent = 3;
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} else if (argv[i]=="-out") {
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++i;
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if (i >= argv.size()) {
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throw std::runtime_error("rsakey error: -out misses filename");
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}
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if (!keypath.empty()) {
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if (argv[i]==keypath) {
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std::cerr<<"rsakey warning: repeated -out file"<<std::endl;
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} else {
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throw std::runtime_error
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("rsakey error: more than one -out file");
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}
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}
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keypath = argv[i];
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}
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else if (argv[i][0]=='-') {
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std::cerr<<"rsakey warning: skipping option "<<argv[i]<<std::endl;
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} else { //main option:
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if (has_main_option) {
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throw std::runtime_error("rsakey error: more than one keysize");
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} //else:
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has_main_option = true;
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try {
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keysize = parse_int(argv[i]);
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} catch (...) {
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std::string errmsg{"rsakey error: invalid keysize "};
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errmsg += argv[i];
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std::throw_with_nested(std::runtime_error(errmsg));
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}
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}
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}
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write_key(gen_rsakey(keysize, exponent), keypath, use_pem);
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}
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void selfsigned(const argv_view & argv)
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{
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bool use_pem = true;
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int days = default_validity;
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std::string keypath{};
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std::string crtpath{};
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std::string subject{};
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bool use_rsa = true;
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int keysize = rsa_min_modulus_bits;
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BN_ULONG exponent = RSA_F4;
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int curve = NID_X9_62_prime256v1;
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for (size_t i=2; i < argv.size(); ++i) {
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if (argv[i]=="-der") {
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use_pem = false;
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} else if (argv[i]=="-days") {
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++i;
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try {
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days = parse_int(argv[i]);
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} catch (...) {
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std::string errmsg{"selfsigned error: not a number for -days "};
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errmsg += argv[i].substr(4);
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std::throw_with_nested(std::runtime_error(errmsg));
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}
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}
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else if (argv[i]=="-newkey") {
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++i;
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if (i >= argv.size()) {
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throw std::runtime_error
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("selfsigned error: -newkey misses algorithm option");
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}
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static constexpr auto rsa_prefix = std::string_view{"rsa:"};
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if (argv[i]=="ec") {
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use_rsa = false;
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} else if (argv[i].rfind(rsa_prefix, 0) == 0) {
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use_rsa = true;
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try {
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keysize = parse_int(argv[i].substr(rsa_prefix.size()));
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} catch (...) {
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std::string errmsg{"selfsigned error: invalid keysize "};
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errmsg += argv[i].substr(4);
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std::throw_with_nested(std::runtime_error(errmsg));
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}
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} else {
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throw std::runtime_error("selfsigned error: invalid algorithm");
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}
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}
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else if (argv[i]=="-pkeyopt") {
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++i;
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if (i >= argv.size()) {
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throw std::runtime_error
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("selfsigned error: -pkeyopt misses value");
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}
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static constexpr auto curve_prefix =
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std::string_view{"ec_paramgen_curve:"};
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if (argv[i].rfind(curve_prefix, 0) != 0) {
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throw std::runtime_error("selfsigned error: -pkeyopt invalid");
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}
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curve = parse_curve(argv[i].substr(curve_prefix.size()));
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}
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else if (argv[i]=="-keyout") {
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++i;
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if (i >= argv.size()) {
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throw std::runtime_error
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("selfsigned error: -keyout misses path");
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}
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if (!keypath.empty()) {
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if (argv[i]==keypath) {
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std::cerr<<"selfsigned warning: repeated -keyout file\n";
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} else {
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throw std::runtime_error
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("selfsigned error: more than one -keyout file");
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}
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}
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keypath = argv[i];
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}
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else if (argv[i]=="-out") {
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++i;
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if (i >= argv.size()) {
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throw std::runtime_error
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("selfsigned error: -out misses filename");
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}
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if (!crtpath.empty()) {
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if (argv[i]==crtpath) {
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std::cerr<<"selfsigned warning: repeated same -out file\n";
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} else {
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throw std::runtime_error
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("selfsigned error: more than one -out file");
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}
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}
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crtpath = argv[i];
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}
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else if (argv[i]=="-subj") {
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++i;
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if (i >= argv.size()) {
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throw std::runtime_error
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("selfsigned error: -subj misses value");
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}
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if (!subject.empty()) {
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if (argv[i]==subject) {
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std::cerr<<"selfsigned warning: repeated same -subj\n";
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} else {
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throw std::runtime_error
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("selfsigned error: more than one -subj value");
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}
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}
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subject = argv[i];
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}
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else {
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std::cerr<<"selfsigned warning: skipping option "<<argv[i]<<std::endl;
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}
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}
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auto pkey = use_rsa ? gen_rsakey(keysize, exponent) : gen_eckey(curve);
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selfsigned(pkey, days, subject, crtpath, use_pem);
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if (!keypath.empty()) { write_key(pkey, keypath, use_pem); }
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}
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auto main(int argc, const char ** argv) -> int
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{
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auto args = argv_view{argv, argc};
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auto cmds = std::array{
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std::array<std::string, 2>{"checkend",
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" [-der] [-in certificate_path] [seconds_remaining]"
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},
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std::array<std::string, 2>{"eckey",
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" [-der] [-out key_path] [curve_name]"
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},
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std::array<std::string, 2>{"rsakey",
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" [-der] [-out key_path] [-3] [key_size]"
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},
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std::array<std::string, 2>{"selfsigned",
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" [-der] [-keyout key_path] [-out certificate_path]"
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" [-newkey ec|rsa:key_size] [-pkeyopt ec_paramgen_curve:name]"
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" [-days validity] [-subj /C=.../ST=.../L=.../O=.../CN=.../... ]"
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},
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};
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try {
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if (argc < 2) { throw std::runtime_error("error: no argument"); }
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if (args[1]==cmds[0][0]) {return checkend(args);}
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if (args[1]==cmds[1][0]) { eckey(args); }
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else if (args[1]==cmds[2][0]) { rsakey(args); }
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else if (args[1]==cmds[3][0]) { selfsigned(args); }
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else { throw std::runtime_error("error: argument not recognized"); }
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}
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catch (const std::exception & e) {
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auto usage = std::string{"usage: \n"} ;
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for (auto cmd : cmds) {
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usage += std::string{4, ' '} + *argv +" "+ cmd[0] + cmd[1] +"\n";
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}
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std::cerr<<usage<<std::flush;
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auto print_nested =
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[](auto && self, const std::exception & outer, int depth=0) -> void
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{
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std::cerr<<std::string(depth, '\t')<<outer.what()<<std::endl;
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try { std::rethrow_if_nested(outer); }
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catch (const std::exception & inner) { self(self, inner, depth+1); }
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};
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print_nested(print_nested, e);
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return 1;
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}
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catch (...) {
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std::cerr<<*argv<<" unknown error."<<std::endl;
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return 2;
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}
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return 0;
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}
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