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Implement FrodoKEM and eFrodoKEM according to ISO 20230314
Integrated into CLI benchmarking tool and X.509 tests Co-Authored-By: René Meusel <[email protected]>
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| /* | ||
| * FrodoKEM modes and constants | ||
| * Based on the MIT licensed reference implementation by the designers | ||
| * (https://github.com/microsoft/PQCrypto-LWEKE/tree/master/src) | ||
| * | ||
| * The Fellowship of the FrodoKEM: | ||
| * (C) 2023 Jack Lloyd | ||
| * 2023 René Meusel, Amos Treiber - Rohde & Schwarz Cybersecurity | ||
| * | ||
| * Botan is released under the Simplified BSD License (see license.txt) | ||
| */ | ||
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| #include <botan/internal/frodo_constants.h> | ||
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| #include <botan/xof.h> | ||
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| namespace Botan { | ||
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| FrodoKEMConstants::FrodoKEMConstants(FrodoKEMMode mode) : m_mode(mode) { | ||
| #if !defined(BOTAN_HAS_AES) | ||
| BOTAN_ARG_CHECK(!mode.is_aes(), "cannot instantiate AES-based FrodoKEM: This build does not support AES"); | ||
| #endif | ||
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| //Common for all parameter sets: | ||
| m_n_bar = 8; | ||
| m_len_a = 128; | ||
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| if(mode.is_ephemeral()) { | ||
| m_len_salt = 0; | ||
| } | ||
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| switch(mode.mode()) { | ||
| case FrodoKEMMode::FrodoKEM640_SHAKE: | ||
| case FrodoKEMMode::FrodoKEM640_AES: | ||
| case FrodoKEMMode::eFrodoKEM640_SHAKE: | ||
| case FrodoKEMMode::eFrodoKEM640_AES: | ||
| m_nist_strength = 128; | ||
| m_d = 15; | ||
| m_n = 640; | ||
| m_b = 2; | ||
| if(mode.is_static()) { | ||
| m_len_salt = 256; | ||
| m_len_se = 256; | ||
| } else if(mode.is_ephemeral()) { | ||
| m_len_se = 128; | ||
| } else { | ||
| BOTAN_ASSERT_UNREACHABLE(); | ||
| } | ||
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| m_cdf_table = {4643, 13363, 20579, 25843, 29227, 31145, 32103, 32525, 32689, 32745, 32762, 32766, 32767}; | ||
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| m_shake = "SHAKE-128"; | ||
| break; | ||
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| case FrodoKEMMode::FrodoKEM976_SHAKE: | ||
| case FrodoKEMMode::FrodoKEM976_AES: | ||
| case FrodoKEMMode::eFrodoKEM976_SHAKE: | ||
| case FrodoKEMMode::eFrodoKEM976_AES: | ||
| m_nist_strength = 192; | ||
| m_d = 16; | ||
| m_n = 976; | ||
| m_b = 3; | ||
| if(mode.is_static()) { | ||
| m_len_salt = 384; | ||
| m_len_se = 384; | ||
| } else if(mode.is_ephemeral()) { | ||
| m_len_se = 192; | ||
| } else { | ||
| BOTAN_ASSERT_UNREACHABLE(); | ||
| } | ||
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| m_cdf_table = {5638, 15915, 23689, 28571, 31116, 32217, 32613, 32731, 32760, 32766, 32767}; | ||
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| m_shake = "SHAKE-256"; | ||
| break; | ||
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| case FrodoKEMMode::FrodoKEM1344_SHAKE: | ||
| case FrodoKEMMode::FrodoKEM1344_AES: | ||
| case FrodoKEMMode::eFrodoKEM1344_SHAKE: | ||
| case FrodoKEMMode::eFrodoKEM1344_AES: | ||
| m_nist_strength = 256; | ||
| m_d = 16; | ||
| m_n = 1344; | ||
| m_b = 4; | ||
| if(mode.is_static()) { | ||
| m_len_salt = 512; | ||
| m_len_se = 512; | ||
| } else if(mode.is_ephemeral()) { | ||
| m_len_se = 256; | ||
| } else { | ||
| BOTAN_ASSERT_UNREACHABLE(); | ||
| } | ||
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| m_cdf_table = {9142, 23462, 30338, 32361, 32725, 32765, 32767}; | ||
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| m_shake = "SHAKE-256"; | ||
| break; | ||
| } | ||
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| m_shake_xof = XOF::create_or_throw(m_shake); | ||
| } | ||
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| FrodoKEMConstants::~FrodoKEMConstants() = default; | ||
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| XOF& FrodoKEMConstants::SHAKE_XOF() const { | ||
| m_shake_xof->clear(); | ||
| return *m_shake_xof; | ||
| } | ||
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| } // namespace Botan |
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