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Merge pull request #3679 from Rohde-Schwarz/pqc/frodokem
PQC: FrodoKEM
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| /* | ||
| * FrodoKEM matrix generator based on SHAKE | ||
| * | ||
| * 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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| #ifndef BOTAN_FRODOKEM_SHAKE_GENERATOR_H_ | ||
| #define BOTAN_FRODOKEM_SHAKE_GENERATOR_H_ | ||
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| #include <botan/internal/frodo_constants.h> | ||
| #include <botan/internal/frodo_types.h> | ||
| #include <botan/internal/loadstor.h> | ||
| #include <botan/internal/shake_xof.h> | ||
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| #include <span> | ||
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| namespace Botan { | ||
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| inline auto create_shake_row_generator(const FrodoKEMConstants& constants, StrongSpan<const FrodoSeedA> seed_a) { | ||
| BOTAN_ASSERT_NOMSG(constants.mode().is_shake()); | ||
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| return [xof = SHAKE_128_XOF(), a = FrodoSeedA(seed_a)](std::span<uint8_t> out, uint16_t i) mutable { | ||
| xof.clear(); | ||
| // TODO: update that once #3707 is merged | ||
| // potentially add a new method: std::array<uint8_t, XX> as_le(uintXX_t) | ||
| std::array<uint8_t, 2> le; | ||
| store_le(i, le.data()); | ||
| xof.update(le); | ||
| xof.update(a); | ||
| xof.output(out); | ||
| }; | ||
| } | ||
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| } // namespace Botan | ||
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| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| <defines> | ||
| FRODOKEM_SHAKE -> 20231114 | ||
| </defines> | ||
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| <module_info> | ||
| name -> "FrodoKEM" | ||
| </module_info> | ||
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| <requires> | ||
| shake_xof | ||
| frodokem_common | ||
| </requires> |
56 changes: 56 additions & 0 deletions
56
src/lib/pubkey/frodokem/frodokem_aes/frodo_aes_generator.h
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * FrodoKEM matrix generator based on AES | ||
| * | ||
| * 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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| #ifndef BOTAN_FRODOKEM_AES_GENERATOR_H_ | ||
| #define BOTAN_FRODOKEM_AES_GENERATOR_H_ | ||
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| #include <botan/internal/aes.h> | ||
| #include <botan/internal/frodo_constants.h> | ||
| #include <botan/internal/frodo_types.h> | ||
| #include <botan/internal/loadstor.h> | ||
| #include <botan/internal/stl_util.h> | ||
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| #include <functional> | ||
| #include <span> | ||
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| namespace Botan { | ||
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| inline auto create_aes_row_generator(const FrodoKEMConstants& constants, StrongSpan<const FrodoSeedA> seed_a) { | ||
| BOTAN_ASSERT_NOMSG(constants.mode().is_aes()); | ||
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| auto setup_aes = [](StrongSpan<const FrodoSeedA> seed) { | ||
| AES_128 aes; | ||
| aes.set_key(seed); | ||
| return aes; | ||
| }; | ||
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| return [n = constants.n(), aes = setup_aes(seed_a)](std::span<uint8_t> out, uint16_t i) { | ||
| BufferStuffer out_bs(out); | ||
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| for(size_t j = 0; j < n; j += 8) { | ||
| // set up the to-be-encrypted 'b' value in the out variable | ||
| // for in-place encryption of the block cipher | ||
| auto out_coefs = out_bs.next(aes.block_size()); | ||
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| // b = i || j || 0000... | ||
| store_le(static_cast<uint16_t>(i), out_coefs.data()); | ||
| store_le(static_cast<uint16_t>(j), out_coefs.data() + sizeof(uint16_t)); | ||
| for(size_t ii = 4; ii < out_coefs.size(); ++ii) { | ||
| out_coefs[ii] = 0; | ||
| } | ||
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| aes.encrypt(out_coefs); | ||
| } | ||
| }; | ||
| } | ||
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| } // namespace Botan | ||
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| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| <defines> | ||
| FRODOKEM_AES -> 20231103 | ||
| </defines> | ||
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| <module_info> | ||
| name -> "FrodoKEM (AES)" | ||
| </module_info> | ||
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| <requires> | ||
| aes | ||
| frodokem_common | ||
| </requires> |
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