diff options
Diffstat (limited to 'src/lib/ffi/ffi_pkey_algs.cpp')
| -rw-r--r-- | src/lib/ffi/ffi_pkey_algs.cpp | 757 |
1 files changed, 757 insertions, 0 deletions
diff --git a/src/lib/ffi/ffi_pkey_algs.cpp b/src/lib/ffi/ffi_pkey_algs.cpp new file mode 100644 index 000000000..8cb9b785e --- /dev/null +++ b/src/lib/ffi/ffi_pkey_algs.cpp @@ -0,0 +1,757 @@ +/* +* (C) 2015,2017 Jack Lloyd +* (C) 2017 Ribose Inc +* +* 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/internal/ffi_mp.h> + +#if defined(BOTAN_HAS_ECC_PUBLIC_KEY_CRYPTO) + #include <botan/ecc_key.h> +#endif + +#if defined(BOTAN_HAS_DL_PUBLIC_KEY_FAMILY) + #include <botan/dl_algo.h> +#endif + +#if defined(BOTAN_HAS_RSA) + #include <botan/rsa.h> +#endif + +#if defined(BOTAN_HAS_ELGAMAL) + #include <botan/elgamal.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_SM2) + #include <botan/sm2.h> +#endif + +#if defined(BOTAN_HAS_ECDH) + #include <botan/ecdh.h> +#endif + +#if defined(BOTAN_HAS_CURVE_25519) + #include <botan/curve25519.h> +#endif + +#if defined(BOTAN_HAS_ED25519) + #include <botan/ed25519.h> +#endif + +#if defined(BOTAN_HAS_MCELIECE) + #include <botan/mceliece.h> +#endif + +#if defined(BOTAN_HAS_MCEIES) + #include <botan/mceies.h> +#endif + +namespace { + +#if defined(BOTAN_HAS_ECC_PUBLIC_KEY_CRYPTO) + +// These are always called within an existing try/catch block + +template<class ECPrivateKey_t> +int privkey_load_ec(std::unique_ptr<ECPrivateKey_t>& key, + const Botan::BigInt& scalar, + const char* curve_name) + { + if(curve_name == nullptr) + return BOTAN_FFI_ERROR_NULL_POINTER; + + Botan::Null_RNG null_rng; + Botan::EC_Group grp(curve_name); + key.reset(new ECPrivateKey_t(null_rng, grp, scalar)); + return BOTAN_FFI_SUCCESS; + } + +template<class ECPublicKey_t> +int pubkey_load_ec(std::unique_ptr<ECPublicKey_t>& key, + const Botan::BigInt& public_x, + const Botan::BigInt& public_y, + const char* curve_name) + { + if(curve_name == nullptr) + return BOTAN_FFI_ERROR_NULL_POINTER; + + Botan::Null_RNG null_rng; + Botan::EC_Group grp(curve_name); + Botan::PointGFp uncompressed_point(grp.get_curve(), public_x, public_y); + key.reset(new ECPublicKey_t(grp, uncompressed_point)); + return BOTAN_FFI_SUCCESS; + } + +#endif + +Botan::BigInt pubkey_get_field(const Botan::Public_Key& key, + const std::string& field) + { + // Maybe this should be `return key.get_integer_field(field_name)`? + +#if defined(BOTAN_HAS_RSA) + if(const Botan::RSA_PublicKey* rsa = dynamic_cast<const Botan::RSA_PublicKey*>(&key)) + { + if(field == "n") + return rsa->get_n(); + else if(field == "e") + return rsa->get_e(); + else + throw Botan::Exception("Field not supported"); + } +#endif + +#if defined(BOTAN_HAS_DL_PUBLIC_KEY_FAMILY) + // Handles DSA, ElGamal, etc + if(const Botan::DL_Scheme_PublicKey* dl = dynamic_cast<const Botan::DL_Scheme_PublicKey*>(&key)) + { + if(field == "p") + return dl->group_p(); + else if(field == "q") + return dl->group_q(); + else if(field == "g") + return dl->group_g(); + else if(field == "y") + return dl->get_y(); + else + throw Botan::Exception("Field not supported"); + } +#endif + +#if defined(BOTAN_HAS_ECC_PUBLIC_KEY_CRYPTO) + if(const Botan::EC_PublicKey* ecc = dynamic_cast<const Botan::EC_PublicKey*>(&key)) + { + if(field == "public_x") + return ecc->public_point().get_affine_x(); + else if(field == "public_y") + return ecc->public_point().get_affine_y(); + else if(field == "base_x") + return ecc->domain().get_base_point().get_affine_x(); + else if(field == "base_y") + return ecc->domain().get_base_point().get_affine_y(); + else if(field == "p") + return ecc->domain().get_curve().get_p(); + else if(field == "a") + return ecc->domain().get_curve().get_a(); + else if(field == "b") + return ecc->domain().get_curve().get_b(); + else if(field == "cofactor") + return ecc->domain().get_cofactor(); + else if(field == "order") + return ecc->domain().get_order(); + else + throw Botan::Exception("Field not supported"); + } +#endif + + // Some other algorithm type not supported by this function + throw Botan::Exception("Unsupported algorithm type for botan_pubkey_get_field"); + } + +Botan::BigInt privkey_get_field(const Botan::Private_Key& key, + const std::string& field) + { + //return key.get_integer_field(field); + +#if defined(BOTAN_HAS_RSA) + + if(const Botan::RSA_PrivateKey* rsa = dynamic_cast<const Botan::RSA_PrivateKey*>(&key)) + { + if(field == "p") + return rsa->get_p(); + else if(field == "q") + return rsa->get_q(); + else if(field == "d") + return rsa->get_d(); + else if(field == "c") + return rsa->get_c(); + else if(field == "d1") + return rsa->get_d1(); + else if(field == "d2") + return rsa->get_d2(); + else + return pubkey_get_field(key, field); + } +#endif + +#if defined(BOTAN_HAS_DL_PUBLIC_KEY_FAMILY) + // Handles DSA, ElGamal, etc + if(const Botan::DL_Scheme_PrivateKey* dl = dynamic_cast<const Botan::DL_Scheme_PrivateKey*>(&key)) + { + if(field == "x") + return dl->get_x(); + else + return pubkey_get_field(key, field); + } +#endif + +#if defined(BOTAN_HAS_ECC_PUBLIC_KEY_CRYPTO) + if(const Botan::EC_PrivateKey* ecc = dynamic_cast<const Botan::EC_PrivateKey*>(&key)) + { + if(field == "x") + return ecc->private_value(); + else + return pubkey_get_field(key, field); + } +#endif + + // Some other algorithm type not supported by this function + throw Botan::Exception("Unsupported algorithm type for botan_privkey_get_field"); + } + +} + +extern "C" { + +using namespace Botan_FFI; + +int botan_pubkey_get_field(botan_mp_t output, + botan_pubkey_t key, + const char* field_name_cstr) + { + if(field_name_cstr == nullptr) + return BOTAN_FFI_ERROR_NULL_POINTER; + + const std::string field_name(field_name_cstr); + + return BOTAN_FFI_DO(Botan::Public_Key, key, k, { + safe_get(output) = pubkey_get_field(k, field_name); + }); + } + +int botan_privkey_get_field(botan_mp_t output, + botan_privkey_t key, + const char* field_name_cstr) + { + if(field_name_cstr == nullptr) + return BOTAN_FFI_ERROR_NULL_POINTER; + + const std::string field_name(field_name_cstr); + + return BOTAN_FFI_DO(Botan::Private_Key, key, k, { + safe_get(output) = privkey_get_field(k, field_name); + }); + } + +/* RSA specific operations */ + +int botan_privkey_create_rsa(botan_privkey_t* key_obj, botan_rng_t rng_obj, size_t n_bits) + { +#if defined(BOTAN_HAS_RSA) + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + if(key_obj == nullptr || rng_obj == nullptr) + return BOTAN_FFI_ERROR_NULL_POINTER; + if(n_bits < 1024 || n_bits > 16*1024) + return BOTAN_FFI_ERROR_BAD_PARAMETER; + + *key_obj = nullptr; + + Botan::RandomNumberGenerator& rng = safe_get(rng_obj); + std::unique_ptr<Botan::Private_Key> key(new Botan::RSA_PrivateKey(rng, n_bits)); + *key_obj = new botan_privkey_struct(key.release()); + return BOTAN_FFI_SUCCESS; + }); +#else + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_privkey_load_rsa(botan_privkey_t* key, + botan_mp_t rsa_p, botan_mp_t rsa_q, botan_mp_t rsa_e) + { +#if defined(BOTAN_HAS_RSA) + *key = nullptr; + + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + *key = new botan_privkey_struct(new Botan::RSA_PrivateKey(safe_get(rsa_p), + safe_get(rsa_q), + safe_get(rsa_e))); + return BOTAN_FFI_SUCCESS; + }); +#else + BOTAN_UNUSED(key, rsa_p, rsa_q, rsa_e); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_pubkey_load_rsa(botan_pubkey_t* key, + botan_mp_t n, botan_mp_t e) + { +#if defined(BOTAN_HAS_RSA) + *key = nullptr; + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + *key = new botan_pubkey_struct(new Botan::RSA_PublicKey(safe_get(n), safe_get(e))); + return BOTAN_FFI_SUCCESS; + }); +#else + BOTAN_UNUSED(key, n, e); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_privkey_rsa_get_p(botan_mp_t p, botan_privkey_t key) + { + return botan_privkey_get_field(p, key, "p"); + } + +int botan_privkey_rsa_get_q(botan_mp_t q, botan_privkey_t key) + { + return botan_privkey_get_field(q, key, "q"); + } + +int botan_privkey_rsa_get_n(botan_mp_t n, botan_privkey_t key) + { + return botan_privkey_get_field(n, key, "n"); + } + +int botan_privkey_rsa_get_e(botan_mp_t e, botan_privkey_t key) + { + return botan_privkey_get_field(e, key, "e"); + } + +int botan_privkey_rsa_get_d(botan_mp_t d, botan_privkey_t key) + { + return botan_privkey_get_field(d, key, "d"); + } + +int botan_pubkey_rsa_get_e(botan_mp_t e, botan_pubkey_t key) + { + return botan_pubkey_get_field(e, key, "e"); + } + +int botan_pubkey_rsa_get_n(botan_mp_t n, botan_pubkey_t key) + { + return botan_pubkey_get_field(n, key, "n"); + } + +/* DSA specific operations */ + +int botan_privkey_load_dsa(botan_privkey_t* key, + botan_mp_t p, botan_mp_t q, botan_mp_t g, botan_mp_t x) + { +#if defined(BOTAN_HAS_DSA) + *key = nullptr; + + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + Botan::Null_RNG null_rng; + Botan::DL_Group group(safe_get(p), safe_get(q), safe_get(g)); + *key = new botan_privkey_struct(new Botan::DSA_PrivateKey(null_rng, group, safe_get(x))); + return BOTAN_FFI_SUCCESS; + }); +#else + BOTAN_UNUSED(key, p, q, g, x); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_pubkey_load_dsa(botan_pubkey_t* key, + botan_mp_t p, botan_mp_t q, botan_mp_t g, botan_mp_t y) + { +#if defined(BOTAN_HAS_DSA) + *key = nullptr; + + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + Botan::DL_Group group(safe_get(p), safe_get(q), safe_get(g)); + *key = new botan_pubkey_struct(new Botan::DSA_PublicKey(group, safe_get(y))); + return BOTAN_FFI_SUCCESS; + }); +#else + BOTAN_UNUSED(key, p, q, g, y); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_privkey_dsa_get_x(botan_mp_t x, botan_privkey_t key) + { + return botan_privkey_get_field(x, key, "x"); + } + +int botan_pubkey_dsa_get_p(botan_mp_t p, botan_pubkey_t key) + { + return botan_pubkey_get_field(p, key, "p"); + } + +int botan_pubkey_dsa_get_q(botan_mp_t q, botan_pubkey_t key) + { + return botan_pubkey_get_field(q, key, "q"); + } + +int botan_pubkey_dsa_get_g(botan_mp_t g, botan_pubkey_t key) + { + return botan_pubkey_get_field(g, key, "g"); + } + +int botan_pubkey_dsa_get_y(botan_mp_t y, botan_pubkey_t key) + { + return botan_pubkey_get_field(y, key, "y"); + } + +int botan_privkey_create_ecdsa(botan_privkey_t* key_obj, botan_rng_t rng_obj, const char* param_str) + { +#if defined(BOTAN_HAS_ECDSA) + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + if(key_obj == nullptr || rng_obj == nullptr || param_str == nullptr || *param_str == 0) + return BOTAN_FFI_ERROR_NULL_POINTER; + + *key_obj = nullptr; + + Botan::RandomNumberGenerator& rng = safe_get(rng_obj); + Botan::EC_Group grp(param_str); + std::unique_ptr<Botan::Private_Key> key(new Botan::ECDSA_PrivateKey(rng, grp)); + *key_obj = new botan_privkey_struct(key.release()); + return BOTAN_FFI_SUCCESS; + }); +#else + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +/* ECDSA specific operations */ + +int botan_pubkey_load_ecdsa(botan_pubkey_t* key, + const botan_mp_t public_x, + const botan_mp_t public_y, + const char* curve_name) + { +#if defined(BOTAN_HAS_ECDSA) + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + std::unique_ptr<Botan::ECDSA_PublicKey> p_key; + + int rc = pubkey_load_ec(p_key, safe_get(public_x), safe_get(public_y), curve_name); + if(rc == BOTAN_FFI_SUCCESS) + *key = new botan_pubkey_struct(p_key.release()); + + return rc; + }); +#else + BOTAN_UNUSED(key, public_x, public_y, curve_name); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_privkey_load_ecdsa(botan_privkey_t* key, + const botan_mp_t scalar, + const char* curve_name) + { +#if defined(BOTAN_HAS_ECDSA) + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + std::unique_ptr<Botan::ECDSA_PrivateKey> p_key; + int rc = privkey_load_ec(p_key, safe_get(scalar), curve_name); + if(rc == BOTAN_FFI_SUCCESS) + *key = new botan_privkey_struct(p_key.release()); + return rc; + }); +#else + BOTAN_UNUSED(key, scalar, curve_name); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +/* ElGamal specific operations */ + +int botan_pubkey_load_elgamal(botan_pubkey_t* key, + botan_mp_t p, botan_mp_t g, botan_mp_t y) + { +#if defined(BOTAN_HAS_ELGAMAL) + *key = nullptr; + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + Botan::DL_Group group(safe_get(p), safe_get(g)); + *key = new botan_pubkey_struct(new Botan::ElGamal_PublicKey(group, safe_get(y))); + return BOTAN_FFI_SUCCESS; + }); +#else + BOTAN_UNUSED(key, p, g, y); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_privkey_load_elgamal(botan_privkey_t* key, + botan_mp_t p, botan_mp_t g, botan_mp_t x) + { +#if defined(BOTAN_HAS_ELGAMAL) + *key = nullptr; + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + Botan::Null_RNG null_rng; + Botan::DL_Group group(safe_get(p), safe_get(g)); + *key = new botan_privkey_struct(new Botan::ElGamal_PrivateKey(null_rng, group, safe_get(x))); + return BOTAN_FFI_SUCCESS; + }); +#else + BOTAN_UNUSED(key, p, g, x); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +/* ECDH + x25519 specific operations */ + +int botan_privkey_create_ecdh(botan_privkey_t* key_obj, botan_rng_t rng_obj, const char* param_str) + { + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + if(key_obj == nullptr || rng_obj == nullptr || param_str == nullptr || *param_str == 0) + return BOTAN_FFI_ERROR_NULL_POINTER; + + *key_obj = nullptr; + + const std::string params(param_str); + +#if defined(BOTAN_HAS_CURVE_25519) + if(params == "curve25519") + { + std::unique_ptr<Botan::Private_Key> key(new Botan::Curve25519_PrivateKey(safe_get(rng_obj))); + *key_obj = new botan_privkey_struct(key.release()); + return BOTAN_FFI_SUCCESS; + } +#endif + +#if defined(BOTAN_HAS_ECDH) + Botan::EC_Group grp(params); + std::unique_ptr<Botan::Private_Key> key(new Botan::ECDH_PrivateKey(safe_get(rng_obj), grp)); + *key_obj = new botan_privkey_struct(key.release()); + return BOTAN_FFI_SUCCESS; +#endif + + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; + }); + } + +int botan_pubkey_load_ecdh(botan_pubkey_t* key, + const botan_mp_t public_x, + const botan_mp_t public_y, + const char* curve_name) + { +#if defined(BOTAN_HAS_ECDH) + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + std::unique_ptr<Botan::ECDH_PublicKey> p_key; + int rc = pubkey_load_ec(p_key, safe_get(public_x), safe_get(public_y), curve_name); + + if(rc == BOTAN_FFI_SUCCESS) + *key = new botan_pubkey_struct(p_key.release()); + return rc; + }); +#else + BOTAN_UNUSED(key, public_x, public_y, curve_name); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_privkey_load_ecdh(botan_privkey_t* key, + const botan_mp_t scalar, + const char* curve_name) + { +#if defined(BOTAN_HAS_ECDH) + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + std::unique_ptr<Botan::ECDH_PrivateKey> p_key; + int rc = privkey_load_ec(p_key, safe_get(scalar), curve_name); + if(rc == BOTAN_FFI_SUCCESS) + *key = new botan_privkey_struct(p_key.release()); + return rc; + }); +#else + BOTAN_UNUSED(key, scalar, curve_name); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +/* SM2 specific operations */ + +int botan_pubkey_load_sm2(botan_pubkey_t* key, + const botan_mp_t public_x, + const botan_mp_t public_y, + const char* curve_name) + { +#if defined(BOTAN_HAS_SM2) + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + std::unique_ptr<Botan::SM2_Signature_PublicKey> p_key; + if(!pubkey_load_ec(p_key, safe_get(public_x), safe_get(public_y), curve_name)) + { + *key = new botan_pubkey_struct(p_key.release()); + return BOTAN_FFI_SUCCESS; + } + return BOTAN_FFI_ERROR_UNKNOWN_ERROR; + }); +#else + BOTAN_UNUSED(key, public_x, public_y, curve_name); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_privkey_load_sm2(botan_privkey_t* key, + const botan_mp_t scalar, + const char* curve_name) + { +#if defined(BOTAN_HAS_SM2) + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + std::unique_ptr<Botan::SM2_Signature_PrivateKey> p_key; + int rc = privkey_load_ec(p_key, safe_get(scalar), curve_name); + + if(rc == BOTAN_FFI_SUCCESS) + *key = new botan_privkey_struct(p_key.release()); + return rc; + }); +#else + BOTAN_UNUSED(key, scalar, curve_name); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +/* Ed25519 specific operations */ + +int botan_privkey_load_ed25519(botan_privkey_t* key, + const uint8_t privkey[32]) + { +#if defined(BOTAN_HAS_ED25519) + *key = nullptr; + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + const Botan::secure_vector<uint8_t> privkey_vec(privkey, privkey + 32); + *key = new botan_privkey_struct(new Botan::Ed25519_PrivateKey(privkey_vec)); + return BOTAN_FFI_SUCCESS; + }); +#else + BOTAN_UNUSED(key, privkey); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_pubkey_load_ed25519(botan_pubkey_t* key, + const uint8_t pubkey[32]) + { +#if defined(BOTAN_HAS_ED25519) + *key = nullptr; + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + const std::vector<uint8_t> pubkey_vec(pubkey, pubkey + 32); + *key = new botan_pubkey_struct(new Botan::Ed25519_PublicKey(pubkey_vec)); + return BOTAN_FFI_SUCCESS; + }); +#else + BOTAN_UNUSED(key, pubkey); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_privkey_ed25519_get_privkey(botan_privkey_t key, + uint8_t output[64]) + { +#if defined(BOTAN_HAS_ED25519) + return BOTAN_FFI_DO(Botan::Private_Key, key, k, { + if(Botan::Ed25519_PrivateKey* ed = dynamic_cast<Botan::Ed25519_PrivateKey*>(&k)) + { + const Botan::secure_vector<uint8_t>& key = ed->get_private_key(); + if(key.size() != 64) + return BOTAN_FFI_ERROR_INSUFFICIENT_BUFFER_SPACE; + Botan::copy_mem(output, key.data(), key.size()); + return BOTAN_FFI_SUCCESS; + } + else + { + return BOTAN_FFI_ERROR_BAD_PARAMETER; + } + }); +#else + BOTAN_UNUSED(key, output); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_pubkey_ed25519_get_pubkey(botan_pubkey_t key, + uint8_t output[32]) + { +#if defined(BOTAN_HAS_ED25519) + return BOTAN_FFI_DO(Botan::Public_Key, key, k, { + if(Botan::Ed25519_PublicKey* ed = dynamic_cast<Botan::Ed25519_PublicKey*>(&k)) + { + const std::vector<uint8_t>& key = ed->get_public_key(); + if(key.size() != 32) + return BOTAN_FFI_ERROR_INSUFFICIENT_BUFFER_SPACE; + Botan::copy_mem(output, key.data(), key.size()); + return BOTAN_FFI_SUCCESS; + } + else + { + return BOTAN_FFI_ERROR_BAD_PARAMETER; + } + }); +#else + BOTAN_UNUSED(key, output); + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_privkey_create_mceliece(botan_privkey_t* key_obj, botan_rng_t rng_obj, size_t n, size_t t) + { +#if defined(BOTAN_HAS_MCELIECE) + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + if(key_obj == nullptr || rng_obj == nullptr || n == 0 || t == 0) + return BOTAN_FFI_ERROR_NULL_POINTER; + + *key_obj = nullptr; + + Botan::RandomNumberGenerator& rng = safe_get(rng_obj); + std::unique_ptr<Botan::Private_Key> key(new Botan::McEliece_PrivateKey(rng, n, t)); + *key_obj = new botan_privkey_struct(key.release()); + return BOTAN_FFI_SUCCESS; + }); +#else + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + } + +int botan_mceies_decrypt(botan_privkey_t mce_key_obj, + const char* aead, + const uint8_t ct[], size_t ct_len, + const uint8_t ad[], size_t ad_len, + uint8_t out[], size_t* out_len) + { + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + Botan::Private_Key& key = safe_get(mce_key_obj); + +#if defined(BOTAN_HAS_MCELIECE) && defined(BOTAN_HAS_MCEIES) + Botan::McEliece_PrivateKey* mce = dynamic_cast<Botan::McEliece_PrivateKey*>(&key); + if(!mce) + return BOTAN_FFI_ERROR_BAD_PARAMETER; + + const Botan::secure_vector<uint8_t> pt = mceies_decrypt(*mce, ct, ct_len, ad, ad_len, aead); + return write_vec_output(out, out_len, pt); +#else + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + }); + } + +int botan_mceies_encrypt(botan_pubkey_t mce_key_obj, + botan_rng_t rng_obj, + const char* aead, + const uint8_t pt[], size_t pt_len, + const uint8_t ad[], size_t ad_len, + uint8_t out[], size_t* out_len) + { + return ffi_guard_thunk(BOTAN_CURRENT_FUNCTION, [=]() { + Botan::Public_Key& key = safe_get(mce_key_obj); + Botan::RandomNumberGenerator& rng = safe_get(rng_obj); + +#if defined(BOTAN_HAS_MCELIECE) && defined(BOTAN_HAS_MCEIES) + Botan::McEliece_PublicKey* mce = dynamic_cast<Botan::McEliece_PublicKey*>(&key); + if(!mce) + return BOTAN_FFI_ERROR_BAD_PARAMETER; + + Botan::secure_vector<uint8_t> ct = mceies_encrypt(*mce, pt, pt_len, ad, ad_len, rng, aead); + return write_vec_output(out, out_len, ct); +#else + return BOTAN_FFI_ERROR_NOT_IMPLEMENTED; +#endif + }); + } + +} |