114 lines
4.3 KiB
C
114 lines
4.3 KiB
C
/* MIT License
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*
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* Copyright (c) 2016-2022 INRIA, CMU and Microsoft Corporation
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* Copyright (c) 2022-2023 HACL* Contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef __Hacl_Ed25519_H
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#define __Hacl_Ed25519_H
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#include <string.h>
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#include "krml/internal/types.h"
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#include "krml/lowstar_endianness.h"
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#include "krml/internal/target.h"
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#include "Hacl_Streaming_Types.h"
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#include "Hacl_Krmllib.h"
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/********************************************************************************
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Verified C library for EdDSA signing and verification on the edwards25519 curve.
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********************************************************************************/
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/**
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Compute the public key from the private key.
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The outparam `public_key` points to 32 bytes of valid memory, i.e., uint8_t[32].
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The argument `private_key` points to 32 bytes of valid memory, i.e., uint8_t[32].
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*/
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void Hacl_Ed25519_secret_to_public(uint8_t *public_key, uint8_t *private_key);
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/**
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Compute the expanded keys for an Ed25519 signature.
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The outparam `expanded_keys` points to 96 bytes of valid memory, i.e., uint8_t[96].
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The argument `private_key` points to 32 bytes of valid memory, i.e., uint8_t[32].
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If one needs to sign several messages under the same private key, it is more efficient
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to call `expand_keys` only once and `sign_expanded` multiple times, for each message.
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*/
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void Hacl_Ed25519_expand_keys(uint8_t *expanded_keys, uint8_t *private_key);
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/**
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Create an Ed25519 signature with the (precomputed) expanded keys.
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The outparam `signature` points to 64 bytes of valid memory, i.e., uint8_t[64].
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The argument `expanded_keys` points to 96 bytes of valid memory, i.e., uint8_t[96].
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The argument `msg` points to `msg_len` bytes of valid memory, i.e., uint8_t[msg_len].
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The argument `expanded_keys` is obtained through `expand_keys`.
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If one needs to sign several messages under the same private key, it is more efficient
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to call `expand_keys` only once and `sign_expanded` multiple times, for each message.
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*/
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void
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Hacl_Ed25519_sign_expanded(
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uint8_t *signature,
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uint8_t *expanded_keys,
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uint32_t msg_len,
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uint8_t *msg);
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/**
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Create an Ed25519 signature.
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The outparam `signature` points to 64 bytes of valid memory, i.e., uint8_t[64].
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The argument `private_key` points to 32 bytes of valid memory, i.e., uint8_t[32].
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The argument `msg` points to `msg_len` bytes of valid memory, i.e., uint8_t[msg_len].
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The function first calls `expand_keys` and then invokes `sign_expanded`.
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If one needs to sign several messages under the same private key, it is more efficient
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to call `expand_keys` only once and `sign_expanded` multiple times, for each message.
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*/
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void
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Hacl_Ed25519_sign(uint8_t *signature, uint8_t *private_key, uint32_t msg_len, uint8_t *msg);
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/**
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Verify an Ed25519 signature.
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The function returns `true` if the signature is valid and `false` otherwise.
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The argument `public_key` points to 32 bytes of valid memory, i.e., uint8_t[32].
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The argument `msg` points to `msg_len` bytes of valid memory, i.e., uint8_t[msg_len].
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The argument `signature` points to 64 bytes of valid memory, i.e., uint8_t[64].
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*/
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bool
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Hacl_Ed25519_verify(uint8_t *public_key, uint32_t msg_len, uint8_t *msg, uint8_t *signature);
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#if defined(__cplusplus)
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}
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#endif
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#define __Hacl_Ed25519_H_DEFINED
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#endif
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