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/*
* (C) 2015,2017 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/ffi.h>
#include <botan/internal/ffi_util.h>
#include <botan/internal/ffi_pkey.h>
#include <botan/internal/ffi_rng.h>
#include <botan/data_src.h>
#include <botan/hash.h>
#include <botan/pkcs8.h>
#include <botan/pk_keys.h>
#include <botan/x509_key.h>
#include <botan/pk_algs.h>
#if defined(BOTAN_HAS_HASH_ID)
#include <botan/hash_id.h>
#endif
extern "C" {
using namespace Botan_FFI;
int botan_privkey_create(botan_privkey_t* key_obj,
const char* algo_name,
const char* algo_params,
botan_rng_t rng_obj)
{
return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() {
if(key_obj == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
*key_obj = nullptr;
if(rng_obj == nullptr)
return BOTAN_FFI_ERROR_NULL_POINTER;
Botan::RandomNumberGenerator& rng = safe_get(rng_obj);
std::unique_ptr<Botan::Private_Key> key(
Botan::create_private_key(algo_name ? algo_name : "RSA",
rng,
algo_params ? algo_params : ""));
if(key)
{
*key_obj = new botan_privkey_struct(key.release());
return BOTAN_FFI_SUCCESS;
}
else
{
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
}
});
}
int botan_privkey_load(botan_privkey_t* key, botan_rng_t rng_obj,
const uint8_t bits[], size_t len,
const char* password)
{
*key = nullptr;
return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() {
Botan::DataSource_Memory src(bits, len);
Botan::RandomNumberGenerator& rng = safe_get(rng_obj);
std::unique_ptr<Botan::Private_Key> pkcs8;
if(password == nullptr)
{
pkcs8.reset(Botan::PKCS8::load_key(src, rng));
}
else
{
pkcs8.reset(Botan::PKCS8::load_key(src, rng, static_cast<std::string>(password)));
}
if(pkcs8)
{
*key = new botan_privkey_struct(pkcs8.release());
return BOTAN_FFI_SUCCESS;
}
return BOTAN_FFI_ERROR_UNKNOWN_ERROR;
});
}
int botan_privkey_destroy(botan_privkey_t key)
{
return BOTAN_FFI_CHECKED_DELETE(key);
}
int botan_pubkey_load(botan_pubkey_t* key,
const uint8_t bits[], size_t bits_len)
{
*key = nullptr;
return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() {
Botan::DataSource_Memory src(bits, bits_len);
std::unique_ptr<Botan::Public_Key> pubkey(Botan::X509::load_key(src));
if(pubkey == nullptr)
return BOTAN_FFI_ERROR_UNKNOWN_ERROR;
*key = new botan_pubkey_struct(pubkey.release());
return BOTAN_FFI_SUCCESS;
});
}
int botan_pubkey_destroy(botan_pubkey_t key)
{
return BOTAN_FFI_CHECKED_DELETE(key);
}
int botan_privkey_export_pubkey(botan_pubkey_t* pubout, botan_privkey_t key_obj)
{
return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() {
std::unique_ptr<Botan::Public_Key>
pubkey(Botan::X509::load_key(Botan::X509::BER_encode(safe_get(key_obj))));
*pubout = new botan_pubkey_struct(pubkey.release());
return BOTAN_FFI_SUCCESS;
});
}
int botan_pubkey_algo_name(botan_pubkey_t key, char out[], size_t* out_len)
{
return BOTAN_FFI_DO(Botan::Public_Key, key, k, { return write_str_output(out, out_len, k.algo_name()); });
}
int botan_pubkey_check_key(botan_pubkey_t key, botan_rng_t rng, uint32_t flags)
{
const bool strong = (flags & BOTAN_CHECK_KEY_EXPENSIVE_TESTS);
return BOTAN_FFI_DO(Botan::Public_Key, key, k,
{ return (k.check_key(safe_get(rng), strong) == true) ? 0 : -1; });
}
int botan_privkey_check_key(botan_privkey_t key, botan_rng_t rng, uint32_t flags)
{
const bool strong = (flags & BOTAN_CHECK_KEY_EXPENSIVE_TESTS);
return BOTAN_FFI_DO(Botan::Private_Key, key, k,
{ return (k.check_key(safe_get(rng), strong) == true) ? 0 : -1; });
}
int botan_pubkey_export(botan_pubkey_t key, uint8_t out[], size_t* out_len, uint32_t flags)
{
return BOTAN_FFI_DO(Botan::Public_Key, key, k, {
if(flags == BOTAN_PRIVKEY_EXPORT_FLAG_DER)
return write_vec_output(out, out_len, Botan::X509::BER_encode(k));
else if(flags == BOTAN_PRIVKEY_EXPORT_FLAG_PEM)
return write_str_output(out, out_len, Botan::X509::PEM_encode(k));
else
return BOTAN_FFI_ERROR_BAD_FLAG;
});
}
int botan_privkey_export(botan_privkey_t key, uint8_t out[], size_t* out_len, uint32_t flags)
{
return BOTAN_FFI_DO(Botan::Private_Key, key, k, {
if(flags == BOTAN_PRIVKEY_EXPORT_FLAG_DER)
return write_vec_output(out, out_len, Botan::PKCS8::BER_encode(k));
else if(flags == BOTAN_PRIVKEY_EXPORT_FLAG_PEM)
return write_str_output(out, out_len, Botan::PKCS8::PEM_encode(k));
else
return BOTAN_FFI_ERROR_BAD_FLAG;
});
}
int botan_privkey_export_encrypted(botan_privkey_t key,
uint8_t out[], size_t* out_len,
botan_rng_t rng_obj,
const char* pass,
const char* /*ignored - pbe*/,
uint32_t flags)
{
return botan_privkey_export_encrypted_pbkdf_iter(key, out, out_len, rng_obj, pass, 100000, nullptr, nullptr, flags);
}
int botan_privkey_export_encrypted_pbkdf_msec(botan_privkey_t key,
uint8_t out[], size_t* out_len,
botan_rng_t rng_obj,
const char* pass,
uint32_t pbkdf_msec,
size_t* pbkdf_iters_out,
const char* maybe_cipher,
const char* maybe_pbkdf_hash,
uint32_t flags)
{
return BOTAN_FFI_DO(Botan::Private_Key, key, k, {
const std::chrono::milliseconds pbkdf_time(pbkdf_msec);
Botan::RandomNumberGenerator& rng = safe_get(rng_obj);
const std::string cipher = (maybe_cipher ? maybe_cipher : "");
const std::string pbkdf_hash = (maybe_pbkdf_hash ? maybe_pbkdf_hash : "");
if(flags == BOTAN_PRIVKEY_EXPORT_FLAG_DER)
{
return write_vec_output(out, out_len,
Botan::PKCS8::BER_encode_encrypted_pbkdf_msec(k, rng, pass, pbkdf_time, pbkdf_iters_out, cipher, pbkdf_hash));
}
else if(flags == BOTAN_PRIVKEY_EXPORT_FLAG_PEM)
{
return write_str_output(out, out_len,
Botan::PKCS8::PEM_encode_encrypted_pbkdf_msec(k, rng, pass, pbkdf_time, pbkdf_iters_out, cipher, pbkdf_hash));
}
else
{
return -2;
}
});
}
int botan_privkey_export_encrypted_pbkdf_iter(botan_privkey_t key,
uint8_t out[], size_t* out_len,
botan_rng_t rng_obj,
const char* pass,
size_t pbkdf_iter,
const char* maybe_cipher,
const char* maybe_pbkdf_hash,
uint32_t flags)
{
return BOTAN_FFI_DO(Botan::Private_Key, key, k, {
Botan::RandomNumberGenerator& rng = safe_get(rng_obj);
const std::string cipher = (maybe_cipher ? maybe_cipher : "");
const std::string pbkdf_hash = (maybe_pbkdf_hash ? maybe_pbkdf_hash : "");
if(flags == BOTAN_PRIVKEY_EXPORT_FLAG_DER)
{
return write_vec_output(out, out_len,
Botan::PKCS8::BER_encode_encrypted_pbkdf_iter(k, rng, pass, pbkdf_iter, cipher, pbkdf_hash));
}
else if(flags == BOTAN_PRIVKEY_EXPORT_FLAG_PEM)
{
return write_str_output(out, out_len,
Botan::PKCS8::PEM_encode_encrypted_pbkdf_iter(k, rng, pass, pbkdf_iter, cipher, pbkdf_hash));
}
else
{
return -2;
}
});
}
int botan_pubkey_estimated_strength(botan_pubkey_t key, size_t* estimate)
{
return BOTAN_FFI_DO(Botan::Public_Key, key, k, { *estimate = k.estimated_strength(); });
}
int botan_pubkey_fingerprint(botan_pubkey_t key, const char* hash_fn,
uint8_t out[], size_t* out_len)
{
return BOTAN_FFI_DO(Botan::Public_Key, key, k, {
std::unique_ptr<Botan::HashFunction> h(Botan::HashFunction::create(hash_fn));
return write_vec_output(out, out_len, h->process(k.public_key_bits()));
});
}
int botan_pkcs_hash_id(const char* hash_name, uint8_t pkcs_id[], size_t* pkcs_id_len)
{
#if defined(BOTAN_HAS_HASH_ID)
return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() {
const std::vector<uint8_t> hash_id = Botan::pkcs_hash_id(hash_name);
return write_output(pkcs_id, pkcs_id_len, hash_id.data(), hash_id.size());
});
#else
return BOTAN_FFI_ERROR_NOT_IMPLEMENTED;
#endif
}
}
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