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/*
* (C) 2010,2014,2015 Jack Lloyd
* (C) 2015 René Korthaus
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include "cli.h"
#if defined(BOTAN_HAS_PUBLIC_KEY_CRYPTO)
#include <botan/base64.h>
#include <botan/pk_keys.h>
#include <botan/pkcs8.h>
#include <botan/pubkey.h>
#if defined(BOTAN_HAS_DL_GROUP)
#include <botan/dl_group.h>
#endif
#if defined(BOTAN_HAS_RSA)
#include <botan/rsa.h>
#endif
#if defined(BOTAN_HAS_DSA)
#include <botan/dsa.h>
#endif
#if defined(BOTAN_HAS_ECDSA)
#include <botan/ecdsa.h>
#endif
#if defined(BOTAN_HAS_CURVE_25519)
#include <botan/curve25519.h>
#endif
#if defined(BOTAN_HAS_MCELIECE)
#include <botan/mceliece.h>
#endif
namespace Botan_CLI {
class PK_Keygen final : public Command
{
public:
PK_Keygen() : Command("keygen --algo=RSA --params= --passphrase= --pbe= --pbe-millis=300 --der-out") {}
static std::unique_ptr<Botan::Private_Key> do_keygen(const std::string& algo,
const std::string& params,
Botan::RandomNumberGenerator& rng)
{
typedef std::function<std::unique_ptr<Botan::Private_Key> (std::string)> gen_fn;
std::map<std::string, gen_fn> generators;
#if defined(BOTAN_HAS_RSA)
generators["RSA"] = [&rng](std::string param) -> std::unique_ptr<Botan::Private_Key> {
if(param.empty())
param = "2048";
return std::unique_ptr<Botan::Private_Key>(
new Botan::RSA_PrivateKey(rng, Botan::to_u32bit(param)));
};
#endif
#if defined(BOTAN_HAS_DSA)
generators["DSA"] = [&rng](std::string param) -> std::unique_ptr<Botan::Private_Key> {
if(param.empty())
param = "dsa/botan/2048";
return std::unique_ptr<Botan::Private_Key>(
new Botan::DSA_PrivateKey(rng, Botan::DL_Group(param)));
};
#endif
#if defined(BOTAN_HAS_ECDSA)
generators["ECDSA"] = [&rng](std::string param) {
if(param.empty())
param = "secp256r1";
Botan::EC_Group grp(param);
return std::unique_ptr<Botan::Private_Key>(
new Botan::ECDSA_PrivateKey(rng, grp));
};
#endif
#if defined(BOTAN_HAS_CURVE_25519)
generators["Curve25519"] = [&rng](std::string /*ignored*/) {
return std::unique_ptr<Botan::Private_Key>(
new Botan::Curve25519_PrivateKey(rng));
};
#endif
#if defined(BOTAN_HAS_MCELIECE)
generators["McEliece"] = [&rng](std::string param) {
if(param.empty())
param = "2280,45";
std::vector<std::string> param_parts = Botan::split_on(param, ',');
if(param_parts.size() != 2)
throw CLI_Usage_Error("Bad McEliece parameters " + param);
return std::unique_ptr<Botan::Private_Key>(
new Botan::McEliece_PrivateKey(rng,
Botan::to_u32bit(param_parts[0]),
Botan::to_u32bit(param_parts[1])));
};
#endif
auto gen = generators.find(algo);
if(gen == generators.end())
{
throw CLI_Error_Unsupported("keygen", algo);
}
return gen->second(params);
}
void go() override
{
std::unique_ptr<Botan::Private_Key> key(do_keygen(get_arg("algo"), get_arg("params"), rng()));
const std::string pass = get_arg("passphrase");
const bool der_out = flag_set("der-out");
const std::chrono::milliseconds pbe_millis(get_arg_sz("pbe-millis"));
const std::string pbe = get_arg("pbe");
if(der_out)
{
if(pass.empty())
{
write_output(Botan::PKCS8::BER_encode(*key));
}
else
{
write_output(Botan::PKCS8::BER_encode(*key, rng(), pass, pbe_millis, pbe));
}
}
else
{
if(pass.empty())
{
output() << Botan::PKCS8::PEM_encode(*key);
}
else
{
output() << Botan::PKCS8::PEM_encode(*key, rng(), pass, pbe_millis, pbe);
}
}
}
};
BOTAN_REGISTER_COMMAND("keygen", PK_Keygen);
namespace {
std::string algo_default_emsa(const std::string& key)
{
if(key == "RSA")
return "EMSA4"; // PSS
else if(key == "ECDSA" || key == "DSA")
return "EMSA1";
else if(key == "RW")
return "EMSA2";
else
return "EMSA1";
}
}
class PK_Sign final : public Command
{
public:
PK_Sign() : Command("sign --passphrase= --hash=SHA-256 --emsa= key file") {}
void go() override
{
std::unique_ptr<Botan::Private_Key> key(Botan::PKCS8::load_key(get_arg("key"),
rng(),
get_arg("passphrase")));
if(!key)
throw CLI_Error("Unable to load private key");
const std::string sig_padding =
get_arg_or("emsa", algo_default_emsa(key->algo_name())) + "(" + get_arg("hash") + ")";
Botan::PK_Signer signer(*key, sig_padding);
this->read_file(get_arg("file"),
[&signer](const uint8_t b[], size_t l) { signer.update(b, l); });
output() << Botan::base64_encode(signer.signature(rng())) << "\n";
}
};
BOTAN_REGISTER_COMMAND("sign", PK_Sign);
class PK_Verify final : public Command
{
public:
PK_Verify() : Command("verify --hash=SHA-256 --emsa= pubkey file signature") {}
void go() override
{
std::unique_ptr<Botan::Public_Key> key(Botan::X509::load_key(get_arg("pubkey")));
if(!key)
throw CLI_Error("Unable to load public key");
const std::string sig_padding =
get_arg_or("emsa", algo_default_emsa(key->algo_name())) + "(" + get_arg("hash") + ")";
Botan::PK_Verifier verifier(*key, sig_padding);
this->read_file(get_arg("file"),
[&verifier](const uint8_t b[], size_t l) { verifier.update(b, l); });
const Botan::secure_vector<uint8_t> signature =
Botan::base64_decode(this->slurp_file_as_str(get_arg("signature")));
const bool valid = verifier.check_signature(signature);
output() << "Signature is " << (valid ? "valid" : "invalid") << "\n";
}
};
BOTAN_REGISTER_COMMAND("verify", PK_Verify);
#if defined(BOTAN_HAS_DL_GROUP)
class Gen_DL_Group final : public Command
{
public:
Gen_DL_Group() : Command("gen_dl_group --pbits=1024 --qbits=0 --type=subgroup") {}
void go() override
{
const size_t pbits = get_arg_sz("pbits");
const std::string type = get_arg("type");
if(type == "strong")
{
Botan::DL_Group grp(rng(), Botan::DL_Group::Strong, pbits);
output() << grp.PEM_encode(Botan::DL_Group::ANSI_X9_42);
}
else if(type == "subgroup")
{
Botan::DL_Group grp(rng(), Botan::DL_Group::Prime_Subgroup, pbits, get_arg_sz("qbits"));
output() << grp.PEM_encode(Botan::DL_Group::ANSI_X9_42);
}
else
throw CLI_Usage_Error("Invalid DL type '" + type + "'");
}
};
BOTAN_REGISTER_COMMAND("gen_dl_group", Gen_DL_Group);
#endif
class PKCS8_Tool final : public Command
{
public:
PKCS8_Tool() : Command("pkcs8 --pass-in= --pub-out --der-out --pass-out= --pbe= --pbe-millis=300 key") {}
void go() override
{
std::unique_ptr<Botan::Private_Key> key(
Botan::PKCS8::load_key(get_arg("key"),
rng(),
get_arg("pass-in")));
const std::chrono::milliseconds pbe_millis(get_arg_sz("pbe-millis"));
const std::string pbe = get_arg("pbe");
const bool der_out = flag_set("der-out");
if(flag_set("pub-out"))
{
if(der_out)
{
write_output(Botan::X509::BER_encode(*key));
}
else
{
output() << Botan::X509::PEM_encode(*key);
}
}
else
{
const std::string pass = get_arg("pass-out");
if(der_out)
{
if(pass.empty())
{
write_output(Botan::PKCS8::BER_encode(*key));
}
else
{
write_output(Botan::PKCS8::BER_encode(*key, rng(), pass, pbe_millis, pbe));
}
}
else
{
if(pass.empty())
{
output() << Botan::PKCS8::PEM_encode(*key);
}
else
{
output() << Botan::PKCS8::PEM_encode(*key, rng(), pass, pbe_millis, pbe);
}
}
}
}
};
BOTAN_REGISTER_COMMAND("pkcs8", PKCS8_Tool);
}
#endif
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