Clean up README and CONTRIBUTING (#273)
* Clean up the docs a bit * Document that qemu-user-static needs Linux
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Thom Wiggers
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@ -73,6 +73,50 @@ See the section [API](#API) below.
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8. Open a pull request on our Github repository and process the feedback given to you by the CI environment. The pull request will also set up a checklist for you and us to follow. Feel free to ask us questions via the pull request.
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### Generating implementations
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It may sometimes be helpful to generate the implementations from a shared code base.
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You can find an example of how this can be done for [SPHINCS+][sphincsclean], [Dilithium][Dilithiumclean] or [Kyber][kyberclean]
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[sphincsclean]: https://github.com/thomwiggers/sphincsplus/tree/pqcleanup
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[dilithiumclean]: https://github.com/thomwiggers/dilithium/tree/pqclean
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[kyberclean]: https://github.com/thomwiggers/kyber-clean/
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### Testing your implementations locally using the PQClean test environment
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It can be helpful to debug issues if you run the testing environment locally.
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This allows you to solve, for example, endianness problems or 32-bit problems much quicker, without waiting for the full CI runs to complete.
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You will need Docker on your computer.
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To run the ARM and powerpc containers you will need to run the following from a Linux computer:
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```sh
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docker pull multiarch/qemu-user-static:register
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docker run --rm --privileged multiarch/qemu-user-static:register --reset
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```
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Then, to launch a specific testing environment, we suggest the following command:
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```sh
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docker run \
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--rm --tty --interactive \
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--volume $PWD:/pqclean \
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--user $(id -u):$(id -g) \
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--workdir /pqclean \
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pqclean/ci-container:ARCHITECTURE \
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/bin/bash
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```
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Replace `ARCHITECTURE` by one of the following:
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* armhf\*
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* arm64\*
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* i386
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* amd64
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* unstable-ppc\*
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Items marked with \* require the `multiarch/qemu-user-static` registation step.
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API
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---
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@ -83,11 +127,11 @@ These items should be available in your `api.h` file.
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Functions:
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```c
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int PQCLEAN_YOURSCHEME_CLEAN_crypto_kem_keypair(
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int PQCLEAN_YOURSCHEME_IMPLEMENTATION_crypto_kem_keypair(
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uint8_t *pk, uint8_t *sk);
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int PQCLEAN_YOURSCHEME_CLEAN_crypto_kem_enc(
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int PQCLEAN_YOURSCHEME_IMPLEMENTATION_crypto_kem_enc(
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uint8_t *ct, uint8_t *ss, const uint8_t *pk);
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int PQCLEAN_YOURSCHEME_CLEAN_crypto_kem_dec(
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int PQCLEAN_YOURSCHEME_IMPLEMENTATION_crypto_kem_dec(
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uint8_t *ss, const uint8_t *ct, const uint8_t *sk);
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```
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@ -104,21 +148,21 @@ int PQCLEAN_YOURSCHEME_CLEAN_crypto_kem_dec(
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Functions:
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```c
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int PQCLEAN_YOURSCHEME_CLEAN_crypto_sign_keypair(
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int PQCLEAN_YOURSCHEME_IMPLEMENTATION_crypto_sign_keypair(
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uint8_t *pk, uint8_t *sk);
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int PQCLEAN_YOURSCHEME_CLEAN_crypto_sign(
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int PQCLEAN_YOURSCHEME_IMPLEMENTATION_crypto_sign(
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uint8_t *sm, size_t *smlen,
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const uint8_t *msg, size_t len,
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const uint8_t *sk);
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int PQCLEAN_YOURSCHEME_CLEAN_crypto_sign_open(
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int PQCLEAN_YOURSCHEME_IMPLEMENTATION_crypto_sign_open(
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uint8_t *m, size_t *mlen,
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const uint8_t *sm, size_t smlen,
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const uint8_t *pk);
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int PQCLEAN_YOURSCHEME_CLEAN_crypto_sign_signature(
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int PQCLEAN_YOURSCHEME_IMPLEMENTATION_crypto_sign_signature(
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uint8_t *sig, size_t *siglen,
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const uint8_t *m, size_t mlen,
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const uint8_t *sk);
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int PQCLEAN_YOURSCHEME_CLEAN_crypto_sign_verify(
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int PQCLEAN_YOURSCHEME_IMPLEMENTATION_crypto_sign_verify(
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const uint8_t *sig, size_t siglen,
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const uint8_t *m, size_t mlen,
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const uint8_t *pk);
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@ -126,14 +170,14 @@ int PQCLEAN_YOURSCHEME_CLEAN_crypto_sign_verify(
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`#define` macros:
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* `PQCLEAN_YOURSCHEME_CLEAN_CRYPTO_SECRETKEYBYTES`
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* `PQCLEAN_YOURSCHEME_CLEAN_CRYPTO_PUBLICKEYBYTES`
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* `PQCLEAN_YOURSCHEME_CLEAN_CRYPTO_ALGNAME`
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* `PQCLEAN_YOURSCHEME_CLEAN_CRYPTO_BYTES`
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* `PQCLEAN_YOURSCHEME_IMPLEMENTATION_CRYPTO_SECRETKEYBYTES`
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* `PQCLEAN_YOURSCHEME_IMPLEMENTATION_CRYPTO_PUBLICKEYBYTES`
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* `PQCLEAN_YOURSCHEME_IMPLEMENTATION_CRYPTO_ALGNAME`
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* `PQCLEAN_YOURSCHEME_IMPLEMENTATION_CRYPTO_BYTES`
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for KEMs, additionally define:
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* `PQCLEAN_YOURSCHEME_CLEAN_CRYPTO_CIPHERTEXTBYTES`
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* `PQCLEAN_YOURSCHEME_IMPLEMENTATION_CRYPTO_CIPHERTEXTBYTES`
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Please make sure your `api.h` file does not include any other files.
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63
README.md
63
README.md
@ -9,7 +9,7 @@ schemes that are in the
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[NIST post-quantum project](https://csrc.nist.gov/projects/post-quantum-cryptography).
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The goal of PQClean is to provide *standalone implementations* that
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* can easily be integrated into libraries such as [liboqs](https://openquantumsafe.org/#liboqs) or [libpqcrypto](https://libpqcrypto.org/);
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* can easily be integrated into libraries such as [liboqs](https://openquantumsafe.org/#liboqs).
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* can efficiently upstream into higher-level protocol integration efforts such as [Open Quantum Safe](https://openquantumsafe.org/#integrations);
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* can easily be integrated into benchmarking frameworks such as [SUPERCOP](https://bench.cr.yp.to/supercop.html);
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* can easily be integrated into frameworks targeting embedded platforms such as [pqm4](https://github.com/mupq/pqm4);
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@ -24,7 +24,8 @@ What PQClean is **not** aiming for is
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* including integration into higher-level applications or protocols.
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As a first main target, we are collecting C implementations that fulfill the requirements
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listed below.
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listed below. We also accept optimised implementations, but still requiring high-quality, tested code.
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Please also review our [guidelines for contributors](CONTRIBUTING.md) if you are interested in adding a scheme to PQClean.
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## Requirements on C implementations that are automatically checked
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@ -40,6 +41,7 @@ _The checking of items on this list is still being developed. Checked items shou
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* [x] Consistent test vectors across runs
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* [x] Consistent test vectors on big-endian and little-endian machines
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* [x] Consistent test vectors on 32-bit and 64-bit machines
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* [x] `const` arguments are labeled as `const`
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* [x] No errors/warnings reported by valgrind
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* [x] No errors/warnings reported by address sanitizer
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* [x] Only dependencies: `fips202.c`, `sha2.c`, `aes.c`, `randombytes.c`
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@ -65,48 +67,61 @@ _The checking of items on this list is still being developed. Checked items shou
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* Minimalist Makefiles
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* No stringification macros
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* Output-parameter pointers in functions are on the left
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* `const` arguments are labeled as `const`
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* All exported symbols are namespaced in place
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* Integer types are of fixed size where relevant, using `stdint.h` types
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* Integers used for indexing memory are of size `size_t`
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* Variable declarations at the beginning (except in `for (size_t i=...`)
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* Integer types are of fixed size where relevant, using `stdint.h` types (optional, recommended)
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* Integers used for indexing memory are of size `size_t` (optional, recommended)
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* Variable declarations at the beginning (except in `for (size_t i=...`) (optional, recommended)
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## Schemes currently in PQClean
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## Clean C implementations currently in PQClean
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For the following schemes we have implementations of one or more of their parameter sets.
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For all of these schemes we have clean C code, but for some we also have optimised code.
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Currently, the continuous-integration and testing environment of PQClean is still work in progress
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and as a consequence PQClean does not yet have many implementations.
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### Key Encapsulation Mechanisms
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<!--
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Currently, PQClean includes clean C implementations of the following KEMs:
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* Classic McEliece
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* FrodoKEM
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* Kyber
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* LedaKEM
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* NTRU
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* NewHope
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* SABER
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* ThreeBears
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* [Kyber-512](https://pq-crystals.org/kyber/)
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* [Kyber-768](https://pq-crystals.org/kyber/)
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* [Kyber-1024](https://pq-crystals.org/kyber/)
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### Signature schemes
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Currently, PQClean includes clean C implementations of the following signature schemes:
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* [Dilithium-III](https://pq-crystals.org/dilithium/)
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-->
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* Dilithium
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* Falcon
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* MQDSS
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* qTESLA
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* Rainbow
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* SPHINCS+
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## API used by PQClean
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PQClean is essentially using the same API as required for the NIST reference implementations,
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which is also used by SUPERCOP and by libpqcrypto. The only two differences to that API are
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which is also used by SUPERCOP and by libpqcrypto. The only differences to that API are
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the following:
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* All functions are namespaced;
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* All lengths are passed as type `size_t` instead of `unsigned long long`; and
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* Signatures offer two additional functions that follow the "traditional" approach used
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in most software stacks of computing and verifying signatures instead of producing and
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recovering signed messages. Specifically, those functions have the following name and signature:
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```
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int crypto_sign_signature(uint8_t *sig, size_t *siglen, const uint8_t *m, size_t mlen, const uint8_t *sk);
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int crypto_sign_verify(const uint8_t *sig, size_t siglen, const uint8_t *m, size_t mlen, const uint8_t *pk);
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```c
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int PQCLEAN_SCHEME_IMPL_crypto_sign_signature(
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uint8_t *sig, size_t *siglen,
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const uint8_t *m, size_t mlen,
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const uint8_t *sk);
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int PQCLEAN_SCHEME_IMPL_crypto_sign_verify(
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const uint8_t *sig, size_t siglen,
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const uint8_t *m, size_t mlen,
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const uint8_t *pk);
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```
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## Building PQClean
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As noted above, PQClean is **not** meant to be built as a single library: it is a collection of source code that can be easily integrated into other libraries. The PQClean repository includes various test programs which do build various files, but you should not use the resulting binaries for any purpose.
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As noted above, PQClean is **not** meant to be built as a single library: it is a collection of source code that can be easily integrated into other libraries. The PQClean repository includes various test programs which do build various files, but you should not use the resulting binaries.
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List of required dependencies: ``gcc or clang, make, python3, python-yaml library, valgrind, astyle (>= 3.0)``.
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@ -116,7 +131,7 @@ Each implementation directory in PQClean (e.g., crypto\_kem/kyber768\clean) can
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1. Copy the source code from the implementation's directory into your project.
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2. Add the files to your project's build system.
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3. Provide instantiations of any of the common cryptographic algorithms used by the implementation. This likely includes `common/randombytes.h` (a cryptographic random number generator), and possibly `common/sha2.h` (the SHA-2 hash function family) and `common/fips202.h` (the SHA-3 hash function family).
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3. Provide instantiations of any of the common cryptographic algorithms used by the implementation. This likely includes `common/randombytes.h` (a cryptographic random number generator), and possibly `common/sha2.h` (the SHA-2 hash function family), `common/aes.h` (AES implementations), `common/fips202.h` (the SHA-3 hash function family) and `common/sp800-185.h` (the cSHAKE family).
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Regarding #2, adding the files to your project's build system, each implementation in PQClean is accompanied by example two makefiles that show how one could build the files for that implementation:
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