I'm having difficulty using the SHA/MD5 periperal library code. I'm trying to calculate a keyed hash of a simple string, namely "Hi There".
Using a key consisting of 16 bytes of 0x0B, the resulting keyed hash should be as follows:
HMAC-SHA-256 = b0344c61d8db38535ca8afceaf0bf12b881dc200c9833da726e9376c2e32cff7
This example key, data, and expected results come from RFC 4231.
The resulting value after the SHAMD5HMACProcess function is not correct. I have a software implementation under Linux that does result in the expected values so I believe my input data and key are right.
Here's the code I'm testing:
memset(g_ui32HMACKey, 0, sizeof(g_ui32HMACKey));
memset(g_ui32DataToHash, 0, sizeof(g_ui32DataToHash));
for (i=0; i<16; i++) { g_ui32HMACKey[i] = 0x0b; }
g_ui32DataToHash[0] = 'H';
g_ui32DataToHash[1] = 'i';
g_ui32DataToHash[2] = ' ';
g_ui32DataToHash[3] = 'T';
g_ui32DataToHash[4] = 'h';
g_ui32DataToHash[5] = 'e';
g_ui32DataToHash[6] = 'r';
g_ui32DataToHash[7] = 'e';
SysCtlPeripheralEnable(SYSCTL_PERIPH_CCM0);
while(!SysCtlPeripheralReady(SYSCTL_PERIPH_CCM0)) { }
SHAMD5Reset(SHAMD5_BASE);
SHAMD5ConfigSet(SHAMD5_BASE, SHAMD5_ALGO_HMAC_SHA256);
SHAMD5HMACKeySet(SHAMD5_BASE, g_ui32HMACKey);
SHAMD5HMACProcess(SHAMD5_BASE, g_ui32DataToHash, 8, pui32HashResult);
