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HMAC fix

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This commit is contained in:
Adam Ierymenko 2019-09-04 15:22:15 -07:00
parent e8f8b0f8e5
commit 82b7e1dbcb
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3 changed files with 65 additions and 36 deletions
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19
node/AES.hpp
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@ -16,6 +16,7 @@
#include "Constants.hpp"
#include "Utils.hpp"
#include "SHA512.hpp"
#if (defined(__amd64) || defined(__amd64__) || defined(__x86_64) || defined(__x86_64__) || defined(__AMD64) || defined(__AMD64__) || defined(_M_X64))
#include <wmmintrin.h>
@ -246,6 +247,24 @@ public:
#endif
}
/**
* Use HMAC-SHA-384 as a PRF to generate four AES keys from one master
*
* @param masterKey Master 256-bit key
* @param k1 GMAC key
* @param k2 GMAC auth tag masking (ECB encryption) key
* @param k3 CTR IV masking (ECB encryption) key
* @param k4 AES-CTR key
*/
static inline void initGmacCtrKeys(const uint8_t masterKey[32],AES &k1,AES &k2,AES &k3,AES &k4)
{
uint64_t kbuf[6];
for(uint8_t kno=0;kno<4;++kno) {
HMACSHA384(masterKey,&kno,1,(uint8_t *)kbuf);
k1.init((const uint8_t *)kbuf);
}
}
private:
static const uint32_t Te0[256];
static const uint32_t Te1[256];