Initialize Keccak before use

software/Keccak/KeccakF-1600-interface.h

@@ -18,6 +18,7 @@ http://creativecommons.org/publicdomain/zero/1.0/
 #define KeccakPermutationSize 1600
 #define KeccakPermutationSizeInBytes (KeccakPermutationSize/8)
 
+void KeccakInitialize(void);
 void KeccakInitializeState(unsigned char *state);
 void KeccakPermutation(unsigned char *state);
 void KeccakAbsorb(unsigned char *state, const unsigned char *data, unsigned int laneCount);

software/Keccak/KeccakF-1600-reference.c

@@ -20,18 +20,21 @@ typedef unsigned char UINT8;
 typedef unsigned long long int UINT64;
 
 #define nrRounds 24
-UINT64 KeccakRoundConstants[nrRounds];
+static UINT64 KeccakRoundConstants[nrRounds];
 #define nrLanes 25
-unsigned int KeccakRhoOffsets[nrLanes];
+static unsigned int KeccakRhoOffsets[nrLanes];
 
+/*
 void KeccakPermutationOnWords(UINT64 *state);
 void theta(UINT64 *A);
 void rho(UINT64 *A);
 void pi(UINT64 *A);
 void chi(UINT64 *A);
 void iota(UINT64 *A, unsigned int indexRound);
+*/
 
-void fromBytesToWords(UINT64 *stateAsWords, const unsigned char *state)
+#if (PLATFORM_BYTE_ORDER != IS_LITTLE_ENDIAN)
+static void fromBytesToWords(UINT64 *stateAsWords, const unsigned char *state)
 {
     unsigned int i, j;
 
@@ -42,7 +45,7 @@ void fromBytesToWords(UINT64 *stateAsWords, const unsigned char *state)
     }
 }
 
-void fromWordsToBytes(unsigned char *state, const UINT64 *stateAsWords)
+static void fromWordsToBytes(unsigned char *state, const UINT64 *stateAsWords)
 {
     unsigned int i, j;
 
@@ -50,6 +53,97 @@ void fromWordsToBytes(unsigned char *state, const UINT64 *stateAsWords)
         for(j=0; j<(64/8); j++)
             state[i*(64/8)+j] = (stateAsWords[i] >> (8*j)) & 0xFF;
 }
+#endif
+
+void KeccakPermutationAfterXor(unsigned char *state, const unsigned char *data, unsigned int dataLengthInBytes)
+{
+    unsigned int i;
+
+    for(i=0; i<dataLengthInBytes; i++)
+        state[i] ^= data[i];
+    KeccakPermutation(state);
+}
+
+#define index(x, y) (((x)%5)+5*((y)%5))
+#define ROL64(a, offset) ((offset != 0) ? ((((UINT64)a) << offset) ^ (((UINT64)a) >> (64-offset))) : a)
+
+static void theta(UINT64 *A)
+{
+    unsigned int x, y;
+    UINT64 C[5], D[5];
+
+    for(x=0; x<5; x++) {
+        C[x] = 0; 
+        for(y=0; y<5; y++) 
+            C[x] ^= A[index(x, y)];
+    }
+    for(x=0; x<5; x++)
+        D[x] = ROL64(C[(x+1)%5], 1) ^ C[(x+4)%5];
+    for(x=0; x<5; x++)
+        for(y=0; y<5; y++)
+            A[index(x, y)] ^= D[x];
+}
+
+static void rho(UINT64 *A)
+{
+    unsigned int x, y;
+
+    for(x=0; x<5; x++) for(y=0; y<5; y++)
+        A[index(x, y)] = ROL64(A[index(x, y)], KeccakRhoOffsets[index(x, y)]);
+}
+
+static void pi(UINT64 *A)
+{
+    unsigned int x, y;
+    UINT64 tempA[25];
+
+    for(x=0; x<5; x++) for(y=0; y<5; y++)
+        tempA[index(x, y)] = A[index(x, y)];
+    for(x=0; x<5; x++) for(y=0; y<5; y++)
+        A[index(0*x+1*y, 2*x+3*y)] = tempA[index(x, y)];
+}
+
+static void chi(UINT64 *A)
+{
+    unsigned int x, y;
+    UINT64 C[5];
+
+    for(y=0; y<5; y++) { 
+        for(x=0; x<5; x++)
+            C[x] = A[index(x, y)] ^ ((~A[index(x+1, y)]) & A[index(x+2, y)]);
+        for(x=0; x<5; x++)
+            A[index(x, y)] = C[x];
+    }
+}
+
+static void iota(UINT64 *A, unsigned int indexRound)
+{
+    A[index(0, 0)] ^= KeccakRoundConstants[indexRound];
+}
+
+static int LFSR86540(UINT8 *LFSR)
+{
+    int result = ((*LFSR) & 0x01) != 0;
+    if (((*LFSR) & 0x80) != 0)
+        // Primitive polynomial over GF(2): x^8+x^6+x^5+x^4+1
+        (*LFSR) = ((*LFSR) << 1) ^ 0x71;
+    else
+        (*LFSR) <<= 1;
+    return result;
+}
+
+void KeccakPermutationOnWords(UINT64 *state)
+{
+    unsigned int i;
+
+    for(i=0; i<nrRounds; i++) {
+        theta(state);
+        rho(state);
+        pi(state);
+        chi(state);
+        iota(state, i);
+    }
+}
 
 void KeccakPermutation(unsigned char *state)
 {
@@ -66,97 +160,7 @@ void KeccakPermutation(unsigned char *state)
 #endif
 }
 
-void KeccakPermutationAfterXor(unsigned char *state, const unsigned char *data, unsigned int dataLengthInBytes)
+static void KeccakInitializeRoundConstants()
-{
-    unsigned int i;
-
-    for(i=0; i<dataLengthInBytes; i++)
-        state[i] ^= data[i];
-    KeccakPermutation(state);
-}
-
-void KeccakPermutationOnWords(UINT64 *state)
-{
-    unsigned int i;
-
-    for(i=0; i<nrRounds; i++) {
-        theta(state);
-        rho(state);
-        pi(state);
-        chi(state);
-        iota(state, i);
-    }
-}
-
-#define index(x, y) (((x)%5)+5*((y)%5))
-#define ROL64(a, offset) ((offset != 0) ? ((((UINT64)a) << offset) ^ (((UINT64)a) >> (64-offset))) : a)
-
-void theta(UINT64 *A)
-{
-    unsigned int x, y;
-    UINT64 C[5], D[5];
-
-    for(x=0; x<5; x++) {
-        C[x] = 0; 
-        for(y=0; y<5; y++) 
-            C[x] ^= A[index(x, y)];
-    }
-    for(x=0; x<5; x++)
-        D[x] = ROL64(C[(x+1)%5], 1) ^ C[(x+4)%5];
-    for(x=0; x<5; x++)
-        for(y=0; y<5; y++)
-            A[index(x, y)] ^= D[x];
-}
-
-void rho(UINT64 *A)
-{
-    unsigned int x, y;
-
-    for(x=0; x<5; x++) for(y=0; y<5; y++)
-        A[index(x, y)] = ROL64(A[index(x, y)], KeccakRhoOffsets[index(x, y)]);
-}
-
-void pi(UINT64 *A)
-{
-    unsigned int x, y;
-    UINT64 tempA[25];
-
-    for(x=0; x<5; x++) for(y=0; y<5; y++)
-        tempA[index(x, y)] = A[index(x, y)];
-    for(x=0; x<5; x++) for(y=0; y<5; y++)
-        A[index(0*x+1*y, 2*x+3*y)] = tempA[index(x, y)];
-}
-
-void chi(UINT64 *A)
-{
-    unsigned int x, y;
-    UINT64 C[5];
-
-    for(y=0; y<5; y++) { 
-        for(x=0; x<5; x++)
-            C[x] = A[index(x, y)] ^ ((~A[index(x+1, y)]) & A[index(x+2, y)]);
-        for(x=0; x<5; x++)
-            A[index(x, y)] = C[x];
-    }
-}
-
-void iota(UINT64 *A, unsigned int indexRound)
-{
-    A[index(0, 0)] ^= KeccakRoundConstants[indexRound];
-}
-
-int LFSR86540(UINT8 *LFSR)
-{
-    int result = ((*LFSR) & 0x01) != 0;
-    if (((*LFSR) & 0x80) != 0)
-        // Primitive polynomial over GF(2): x^8+x^6+x^5+x^4+1
-        (*LFSR) = ((*LFSR) << 1) ^ 0x71;
-    else
-        (*LFSR) <<= 1;
-    return result;
-}
-
-void KeccakInitializeRoundConstants()
 {
     UINT8 LFSRstate = 0x01;
     unsigned int i, j, bitPosition;
@@ -171,7 +175,7 @@ void KeccakInitializeRoundConstants()
     }
 }
 
-void KeccakInitializeRhoOffsets()
+static void KeccakInitializeRhoOffsets()
 {
     unsigned int x, y, t, newX, newY;
 
@@ -187,7 +191,7 @@ void KeccakInitializeRhoOffsets()
     }
 }
 
-void KeccakInitialize()
+void KeccakInitialize(void)
 {
     KeccakInitializeRoundConstants();
     KeccakInitializeRhoOffsets();

software/Makefile

@@ -1,7 +1,7 @@
 CFLAGS = -Wall -Wextra -Werror -std=c99 -O3 -I Keccak -I /usr/include/libftdi1
 
-@_=	$(shell ld -lftdi 2> /dev/null)
+FOUND = $(shell ldconfig -p | grep --silent libftdi.so && echo found)
-ifeq ($$?, 0)
+ifeq ($(FOUND), found)
 	FTDI=	-lftdi
 else
 	FTDI=	-lftdi1

software/infnoise.c

@@ -251,6 +251,7 @@ int main(int argc, char **argv)
         fputs("Can't intialize health checker\n", stderr);
         return 1;
     }
+    KeccakInitialize();
     uint8_t keccakState[KeccakPermutationSizeInBytes];
     KeccakInitializeState(keccakState);