diff options
Diffstat (limited to 'botan/src/pubkey/nr')
-rw-r--r-- | botan/src/pubkey/nr/info.txt | 22 | ||||
-rw-r--r-- | botan/src/pubkey/nr/nr.cpp | 134 | ||||
-rw-r--r-- | botan/src/pubkey/nr/nr.h | 63 | ||||
-rw-r--r-- | botan/src/pubkey/nr/nr_core.cpp | 62 | ||||
-rw-r--r-- | botan/src/pubkey/nr/nr_core.h | 37 | ||||
-rw-r--r-- | botan/src/pubkey/nr/nr_op.cpp | 71 | ||||
-rw-r--r-- | botan/src/pubkey/nr/nr_op.h | 53 |
7 files changed, 442 insertions, 0 deletions
diff --git a/botan/src/pubkey/nr/info.txt b/botan/src/pubkey/nr/info.txt new file mode 100644 index 0000000..c89820a --- /dev/null +++ b/botan/src/pubkey/nr/info.txt @@ -0,0 +1,22 @@ +realname "Nyberg-Rueppel" + +define NYBERG_RUEPPEL + +load_on auto + +<add> +nr.cpp +nr.h +nr_core.cpp +nr_core.h +nr_op.cpp +nr_op.h +</add> + +<requires> +dl_algo +dl_group +keypair +libstate +numbertheory +</requires> diff --git a/botan/src/pubkey/nr/nr.cpp b/botan/src/pubkey/nr/nr.cpp new file mode 100644 index 0000000..ad4ae78 --- /dev/null +++ b/botan/src/pubkey/nr/nr.cpp @@ -0,0 +1,134 @@ +/* +* Nyberg-Rueppel +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/nr.h> +#include <botan/numthry.h> +#include <botan/keypair.h> +#include <botan/look_pk.h> + +namespace Botan { + +/* +* NR_PublicKey Constructor +*/ +NR_PublicKey::NR_PublicKey(const DL_Group& grp, const BigInt& y1) + { + group = grp; + y = y1; + X509_load_hook(); + } + +/* +* Algorithm Specific X.509 Initialization Code +*/ +void NR_PublicKey::X509_load_hook() + { + core = NR_Core(group, y); + } + +/* +* Nyberg-Rueppel Verification Function +*/ +SecureVector<byte> NR_PublicKey::verify(const byte sig[], u32bit sig_len) const + { + return core.verify(sig, sig_len); + } + +/* +* Return the maximum input size in bits +*/ +u32bit NR_PublicKey::max_input_bits() const + { + return (group_q().bits() - 1); + } + +/* +* Return the size of each portion of the sig +*/ +u32bit NR_PublicKey::message_part_size() const + { + return group_q().bytes(); + } + +/* +* Create a NR private key +*/ +NR_PrivateKey::NR_PrivateKey(RandomNumberGenerator& rng, + const DL_Group& grp, + const BigInt& x_arg) + { + group = grp; + x = x_arg; + + if(x == 0) + { + x = BigInt::random_integer(rng, 2, group_q() - 1); + PKCS8_load_hook(rng, true); + } + else + PKCS8_load_hook(rng, false); + } + +/* +* Algorithm Specific PKCS #8 Initialization Code +*/ +void NR_PrivateKey::PKCS8_load_hook(RandomNumberGenerator& rng, + bool generated) + { + if(y == 0) + y = power_mod(group_g(), x, group_p()); + core = NR_Core(group, y, x); + + if(generated) + gen_check(rng); + else + load_check(rng); + } + +/* +* Nyberg-Rueppel Signature Operation +*/ +SecureVector<byte> NR_PrivateKey::sign(const byte in[], u32bit length, + RandomNumberGenerator& rng) const + { + const BigInt& q = group_q(); + + BigInt k; + do + k.randomize(rng, q.bits()); + while(k >= q); + + return core.sign(in, length, k); + } + +/* +* Check Private Nyberg-Rueppel Parameters +*/ +bool NR_PrivateKey::check_key(RandomNumberGenerator& rng, bool strong) const + { + if(!DL_Scheme_PrivateKey::check_key(rng, strong) || x >= group_q()) + return false; + + if(!strong) + return true; + + try + { + KeyPair::check_key(rng, + get_pk_signer(*this, "EMSA1(SHA-1)"), + get_pk_verifier(*this, "EMSA1(SHA-1)") + ); + } + catch(Self_Test_Failure) + { + return false; + } + + return true; + } + +} diff --git a/botan/src/pubkey/nr/nr.h b/botan/src/pubkey/nr/nr.h new file mode 100644 index 0000000..144c5ec --- /dev/null +++ b/botan/src/pubkey/nr/nr.h @@ -0,0 +1,63 @@ +/* +* Nyberg-Rueppel +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#ifndef BOTAN_NYBERG_RUEPPEL_H__ +#define BOTAN_NYBERG_RUEPPEL_H__ + +#include <botan/dl_algo.h> +#include <botan/nr_core.h> + +namespace Botan { + +/* +* Nyberg-Rueppel Public Key +*/ +class BOTAN_DLL NR_PublicKey : public PK_Verifying_with_MR_Key, + public virtual DL_Scheme_PublicKey + { + public: + std::string algo_name() const { return "NR"; } + + SecureVector<byte> verify(const byte[], u32bit) const; + u32bit max_input_bits() const; + + DL_Group::Format group_format() const { return DL_Group::ANSI_X9_57; } + u32bit message_parts() const { return 2; } + u32bit message_part_size() const; + + NR_PublicKey() {} + NR_PublicKey(const DL_Group&, const BigInt&); + protected: + NR_Core core; + private: + void X509_load_hook(); + }; + +/* +* Nyberg-Rueppel Private Key +*/ +class BOTAN_DLL NR_PrivateKey : public NR_PublicKey, + public PK_Signing_Key, + public virtual DL_Scheme_PrivateKey + { + public: + SecureVector<byte> sign(const byte[], u32bit, + RandomNumberGenerator& rng) const; + + bool check_key(RandomNumberGenerator& rng, bool) const; + + NR_PrivateKey() {} + + NR_PrivateKey(RandomNumberGenerator&, const DL_Group&, + const BigInt& = 0); + private: + void PKCS8_load_hook(RandomNumberGenerator&, bool = false); + }; + +} + +#endif diff --git a/botan/src/pubkey/nr/nr_core.cpp b/botan/src/pubkey/nr/nr_core.cpp new file mode 100644 index 0000000..afa1115 --- /dev/null +++ b/botan/src/pubkey/nr/nr_core.cpp @@ -0,0 +1,62 @@ +/* +* NR Core +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/nr_core.h> +#include <botan/numthry.h> +#include <botan/pk_engine.h> +#include <botan/parsing.h> +#include <algorithm> + +namespace Botan { + +/* +* NR_Core Constructor +*/ +NR_Core::NR_Core(const DL_Group& group, const BigInt& y, const BigInt& x) + { + op = Engine_Core::nr_op(group, y, x); + } + +/* +* NR_Core Copy Constructor +*/ +NR_Core::NR_Core(const NR_Core& core) + { + op = 0; + if(core.op) + op = core.op->clone(); + } + +/* +* NR_Core Assignment Operator +*/ +NR_Core& NR_Core::operator=(const NR_Core& core) + { + delete op; + if(core.op) + op = core.op->clone(); + return (*this); + } + +/* +* NR Verification Operation +*/ +SecureVector<byte> NR_Core::verify(const byte in[], u32bit length) const + { + return op->verify(in, length); + } + +/* +* NR Signature Operation +*/ +SecureVector<byte> NR_Core::sign(const byte in[], u32bit length, + const BigInt& k) const + { + return op->sign(in, length, k); + } + +} diff --git a/botan/src/pubkey/nr/nr_core.h b/botan/src/pubkey/nr/nr_core.h new file mode 100644 index 0000000..4837736 --- /dev/null +++ b/botan/src/pubkey/nr/nr_core.h @@ -0,0 +1,37 @@ +/* +* NR Core +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#ifndef BOTAN_NR_CORE_H__ +#define BOTAN_NR_CORE_H__ + +#include <botan/nr_op.h> +#include <botan/dl_group.h> + +namespace Botan { + +/* +* NR Core +*/ +class BOTAN_DLL NR_Core + { + public: + SecureVector<byte> sign(const byte[], u32bit, const BigInt&) const; + SecureVector<byte> verify(const byte[], u32bit) const; + + NR_Core& operator=(const NR_Core&); + + NR_Core() { op = 0; } + NR_Core(const NR_Core&); + NR_Core(const DL_Group&, const BigInt&, const BigInt& = 0); + ~NR_Core() { delete op; } + private: + NR_Operation* op; + }; + +} + +#endif diff --git a/botan/src/pubkey/nr/nr_op.cpp b/botan/src/pubkey/nr/nr_op.cpp new file mode 100644 index 0000000..b5efa3d --- /dev/null +++ b/botan/src/pubkey/nr/nr_op.cpp @@ -0,0 +1,71 @@ +/* +* NR Operations +* (C) 1999-2007 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#include <botan/nr_op.h> + +namespace Botan { + +/* +* Default_NR_Op Constructor +*/ +Default_NR_Op::Default_NR_Op(const DL_Group& grp, const BigInt& y1, + const BigInt& x1) : x(x1), y(y1), group(grp) + { + powermod_g_p = Fixed_Base_Power_Mod(group.get_g(), group.get_p()); + powermod_y_p = Fixed_Base_Power_Mod(y, group.get_p()); + mod_p = Modular_Reducer(group.get_p()); + mod_q = Modular_Reducer(group.get_q()); + } + +/* +* Default NR Verify Operation +*/ +SecureVector<byte> Default_NR_Op::verify(const byte in[], u32bit length) const + { + const BigInt& q = group.get_q(); + + if(length != 2*q.bytes()) + return false; + + BigInt c(in, q.bytes()); + BigInt d(in + q.bytes(), q.bytes()); + + if(c.is_zero() || c >= q || d >= q) + throw Invalid_Argument("Default_NR_Op::verify: Invalid signature"); + + BigInt i = mod_p.multiply(powermod_g_p(d), powermod_y_p(c)); + return BigInt::encode(mod_q.reduce(c - i)); + } + +/* +* Default NR Sign Operation +*/ +SecureVector<byte> Default_NR_Op::sign(const byte in[], u32bit length, + const BigInt& k) const + { + if(x == 0) + throw Internal_Error("Default_NR_Op::sign: No private key"); + + const BigInt& q = group.get_q(); + + BigInt f(in, length); + + if(f >= q) + throw Invalid_Argument("Default_NR_Op::sign: Input is out of range"); + + BigInt c = mod_q.reduce(powermod_g_p(k) + f); + if(c.is_zero()) + throw Internal_Error("Default_NR_Op::sign: c was zero"); + BigInt d = mod_q.reduce(k - x * c); + + SecureVector<byte> output(2*q.bytes()); + c.binary_encode(output + (output.size() / 2 - c.bytes())); + d.binary_encode(output + (output.size() - d.bytes())); + return output; + } + +} diff --git a/botan/src/pubkey/nr/nr_op.h b/botan/src/pubkey/nr/nr_op.h new file mode 100644 index 0000000..cba1465 --- /dev/null +++ b/botan/src/pubkey/nr/nr_op.h @@ -0,0 +1,53 @@ +/* +* NR Operations +* (C) 1999-2008 Jack Lloyd +* +* Distributed under the terms of the Botan license +*/ + +#ifndef BOTAN_NR_OPS_H__ +#define BOTAN_NR_OPS_H__ + +#include <botan/pow_mod.h> +#include <botan/numthry.h> +#include <botan/reducer.h> +#include <botan/dl_group.h> + +namespace Botan { + +/* +* NR Operation +*/ +class BOTAN_DLL NR_Operation + { + public: + virtual SecureVector<byte> verify(const byte[], u32bit) const = 0; + virtual SecureVector<byte> sign(const byte[], u32bit, + const BigInt&) const = 0; + virtual NR_Operation* clone() const = 0; + virtual ~NR_Operation() {} + }; + +/* +* Botan's Default NR Operation +*/ +class BOTAN_DLL Default_NR_Op : public NR_Operation + { + public: + SecureVector<byte> verify(const byte[], u32bit) const; + SecureVector<byte> sign(const byte[], u32bit, const BigInt&) const; + + NR_Operation* clone() const { return new Default_NR_Op(*this); } + + Default_NR_Op(const DL_Group&, const BigInt&, const BigInt&); + private: + const BigInt x, y; + const DL_Group group; + Fixed_Base_Power_Mod powermod_g_p, powermod_y_p; + Modular_Reducer mod_p, mod_q; + }; + + +} + +#endif |