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KBKDF

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Adam Ierymenko 2019-09-05 11:39:16 -07:00
parent 70648d006d
commit 44dd52d08f
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3 changed files with 47 additions and 13 deletions
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17
node/SHA512.hpp
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@ -32,6 +32,12 @@
#define ZT_HMACSHA384_LEN 48
#define ZT_PROTO_KBKDF_LABEL_KEY_USE_HMAC 'H'
#define ZT_PROTO_KBKDF_LABEL_KEY_USE_AES_GMAC_SIV_K1 '1'
#define ZT_PROTO_KBKDF_LABEL_KEY_USE_AES_GMAC_SIV_K2 '2'
#define ZT_PROTO_KBKDF_LABEL_KEY_USE_AES_GMAC_SIV_K3 '3'
#define ZT_PROTO_KBKDF_LABEL_KEY_USE_AES_GMAC_SIV_K4 '4'
namespace ZeroTier {
#ifdef __APPLE__
@ -102,6 +108,17 @@ void SHA384(void *digest,const void *data0,unsigned int len0,const void *data1,u
*/
void HMACSHA384(const uint8_t key[32],const void *msg,const unsigned int msglen,uint8_t mac[48]);
/**
* Compute KBKDF (key-based key derivation function) using HMAC-SHA-384 as a PRF
*
* @param key Source master key
* @param label A label indicating the key's purpose in the ZeroTier system
* @param context An arbitrary "context" or zero if not applicable
* @param iter Key iteration for generation of multiple keys for the same label/context
* @param out Output to receive derived key
*/
void KBKDFHMACSHA384(const uint8_t key[32],const char label,const char context,const uint32_t iter,uint8_t out[32]);
} // namespace ZeroTier
#endif