Remove usage of Fingerprint functions

e2e/singleUse/responseFingerprint.go

@@ -21,7 +21,8 @@ const responseFPConstant = "responseFPConstant"
 // the given key number.
 func ResponseFingerprint(dhKey *cyclic.Int, keyNum uint64) format.Fingerprint {
 	// Create fingerprint
-	fp := format.NewFingerprint(makeKeyHash(dhKey, keyNum, responseFPConstant))
+	fp := format.Fingerprint{}
+	copy(fp[:], makeKeyHash(dhKey, keyNum, responseFPConstant))
 
 	// Set the first bit as zero to ensure everything stays in the group
 	fp[0] &= 0b01111111

e2e/singleUse/responseFingerprint_test.go

@@ -24,12 +24,13 @@ func TestResponseFingerprint(t *testing.T) {
 	dhKey := diffieHellman.GeneratePublicKey(diffieHellman.GeneratePrivateKey(
 		diffieHellman.DefaultPrivateKeyLength, grp, prng), grp)
 	testFP := ResponseFingerprint(dhKey, 0)
+	testFPb64 := base64.StdEncoding.EncodeToString(testFP[:])
 
-	if expectedFP != testFP.String() {
+	if expectedFP != testFPb64 {
 		t.Errorf("ResponseFingerprint() did not return the expected "+
 			"fingerprint for public key %s."+
 			"\nexpected: %s\nreceived: %s",
-			dhKey.Text(10), expectedFP, testFP)
+			dhKey.Text(10), expectedFP, testFPb64)
 	}
 }
 

e2e/singleUse/transmitFingerprint.go

@@ -18,7 +18,8 @@ const transmitFPConstant = "transmitFPConstant"
 // message.
 func TransmitFingerprint(dhKey *cyclic.Int) format.Fingerprint {
 	// Create fingerprint
-	fp := format.NewFingerprint(makeHash(dhKey, []byte(transmitFPConstant)))
+	fp := format.Fingerprint{}
+	copy(fp[:], makeHash(dhKey, []byte(transmitFPConstant)))
 
 	// Set the first bit as zero to ensure everything stays in the group
 	fp[0] &= 0b01111111

e2e/singleUse/transmitFingerprint_test.go

@@ -38,12 +38,13 @@ func TestTransmitFingerprint_Consistency(t *testing.T) {
 		dhKey := diffieHellman.GeneratePublicKey(diffieHellman.GeneratePrivateKey(
 			diffieHellman.DefaultPrivateKeyLength, grp, prng), grp)
 		testFP := TransmitFingerprint(dhKey)
+		testFPb64 := base64.StdEncoding.EncodeToString(testFP[:])
 
-		if expected != testFP.String() {
+		if expected != testFPb64 {
 			t.Errorf("TransmitFingerprint() did not return the expected "+
 				"fingerprint for public key %s at index %d."+
 				"\nexpected: %s\nreceived: %s",
-				dhKey.Text(10), i, expected, testFP)
+				dhKey.Text(10), i, expected, testFPb64)
 		}
 	}
 }