mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2025-09-04 13:52:52 +02:00
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* (c) ZeroTier, Inc.
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* https://www.zerotier.com/
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*/
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#ifndef ZT_SHA512_HPP
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#define ZT_SHA512_HPP
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#include "Constants.hpp"
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#ifdef __APPLE__
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#include <CommonCrypto/CommonDigest.h>
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#endif
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#define ZT_SHA512_DIGEST_SIZE 64
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#define ZT_SHA384_DIGEST_SIZE 48
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#define ZT_SHA512_BLOCK_SIZE 128
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#define ZT_SHA384_BLOCK_SIZE 128
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#define ZT_HMACSHA384_LEN 48
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namespace ZeroTier {
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// SHA384 and SHA512 are actually in the standard libraries on MacOS and iOS
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#ifdef __APPLE__
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#define ZT_HAVE_NATIVE_SHA512 1
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static ZT_INLINE void SHA512(void* digest, const void* data, unsigned int len)
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{
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CC_SHA512_CTX ctx;
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CC_SHA512_Init(&ctx);
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CC_SHA512_Update(&ctx, data, len);
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CC_SHA512_Final(reinterpret_cast<unsigned char*>(digest), &ctx);
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}
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static ZT_INLINE void SHA384(void* digest, const void* data, unsigned int len)
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{
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CC_SHA512_CTX ctx;
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CC_SHA384_Init(&ctx);
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CC_SHA384_Update(&ctx, data, len);
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CC_SHA384_Final(reinterpret_cast<unsigned char*>(digest), &ctx);
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}
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static ZT_INLINE void SHA384(void* digest, const void* data0, unsigned int len0, const void* data1, unsigned int len1)
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{
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CC_SHA512_CTX ctx;
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CC_SHA384_Init(&ctx);
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CC_SHA384_Update(&ctx, data0, len0);
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CC_SHA384_Update(&ctx, data1, len1);
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CC_SHA384_Final(reinterpret_cast<unsigned char*>(digest), &ctx);
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}
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#endif
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#ifndef ZT_HAVE_NATIVE_SHA512
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void SHA512(void* digest, const void* data, unsigned int len);
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void SHA384(void* digest, const void* data, unsigned int len);
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void SHA384(void* digest, const void* data0, unsigned int len0, const void* data1, unsigned int len1);
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#endif
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/**
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* Compute HMAC SHA-384 using a 256-bit key
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*
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* @param key Secret key
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* @param msg Message to HMAC
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* @param msglen Length of message
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* @param mac Buffer to fill with result
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*/
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void HMACSHA384(const uint8_t key[ZT_SYMMETRIC_KEY_SIZE], const void* msg, unsigned int msglen, uint8_t mac[48]);
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/**
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* Compute KBKDF (key-based key derivation function) using HMAC-SHA-384 as a PRF
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*
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* @param key Source master key
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* @param label A label indicating the key's purpose in the ZeroTier system
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* @param context An arbitrary "context" or zero if not applicable
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* @param iter Key iteration for generation of multiple keys for the same label/context
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* @param out Output to receive derived key
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*/
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void KBKDFHMACSHA384(const uint8_t key[ZT_SYMMETRIC_KEY_SIZE], char label, char context, uint32_t iter, uint8_t out[ZT_SYMMETRIC_KEY_SIZE]);
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} // namespace ZeroTier
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#endif
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