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-rw-r--r--src/sw/hash_tester.c89
-rwxr-xr-xsrc/sw/hash_tester.py76
2 files changed, 114 insertions, 51 deletions
diff --git a/src/sw/hash_tester.c b/src/sw/hash_tester.c
index d02db41..f202a03 100644
--- a/src/sw/hash_tester.c
+++ b/src/sw/hash_tester.c
@@ -63,15 +63,16 @@
#define EOC 0xaa
#define READ_CMD 0x10
#define WRITE_CMD 0x11
+#define RESET_CMD 0x01
/* response codes */
#define SOR 0xaa
#define EOR 0x55
-#define UNKNOWN 0xfe
-#define ERROR 0xfd
#define READ_OK 0x7f
#define WRITE_OK 0x7e
#define RESET_OK 0x7d
+#define UNKNOWN 0xfe
+#define ERROR 0xfd
/* addresses and codes common to all hash cores */
#define ADDR_NAME0 0x00
@@ -253,26 +254,16 @@ int i2c_write(uint8_t *buf, int len)
return 0;
}
-int i2c_read(uint8_t *buf, int len)
+int i2c_read(uint8_t *b)
{
- int i;
-
- if (debug)
- printf("read [");
-
- for (i = 0; i < len; ++i) {
- if (read(i2cfd, &buf[i], 1) != 1) {
- fprintf(stderr, "i2c read failed on byte %d: ", i);
- perror("");
- return 1;
- }
- if (debug)
- printf(" %02x", buf[i]);
+ /* read() on the i2c device only returns one byte at a time,
+ * and tc_get_resp() needs to parse the response one byte at a time
+ */
+ if (read(i2cfd, b, 1) != 1) {
+ perror("i2c read failed");
+ return 1;
}
- if (debug)
- printf(" ]\n");
-
return 0;
}
@@ -307,12 +298,58 @@ int tc_send_read_cmd(uint8_t addr0, uint8_t addr1)
return i2c_write(buf, sizeof(buf));
}
-int tc_get_resp(uint8_t *expected, int len)
+int tc_get_resp(uint8_t *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; ++i) {
+ if (i2c_read(&buf[i]) != 0)
+ return 1;
+ if ((i == 0) && (buf[i] != SOR)) {
+ /* we've gotten out of sync, and there's probably nothing we can do */
+ fprintf(stderr, "response byte 0: expected 0x%02x (SOR), got 0x%02x\n",
+ SOR, buf[0]);
+ return 1;
+ }
+ else if (i == 1) { /* response code */
+ switch (buf[i]) {
+ case READ_OK:
+ len = 9;
+ break;
+ case WRITE_OK:
+ len = 5;
+ break;
+ case RESET_OK:
+ len = 3;
+ break;
+ case ERROR:
+ case UNKNOWN:
+ len = 4;
+ break;
+ default:
+ /* we've gotten out of sync, and there's probably nothing we can do */
+ fprintf(stderr, "unknown response code 0x%02x\n", buf[i]);
+ return 1;
+ }
+ }
+ }
+
+ if (debug) {
+ printf("read [");
+ for (i = 0; i < len; ++i)
+ printf(" %02x", buf[i]);
+ printf(" ]\n");
+ }
+
+ return 0;
+}
+
+int tc_get_expected(uint8_t *expected, int len)
{
uint8_t buf[9];
int i;
- if (i2c_read(buf, len) != 0)
+ if (tc_get_resp(buf, sizeof(buf)) != 0)
return 1;
for (i = 0; i < len; ++i) {
@@ -336,7 +373,7 @@ int tc_get_write_resp(uint8_t addr0, uint8_t addr1)
expected[3] = addr1;
expected[4] = EOR;
- return tc_get_resp(expected, sizeof(expected));
+ return tc_get_expected(expected, sizeof(expected));
}
int tc_get_read_resp(uint8_t addr0, uint8_t addr1, uint32_t data)
@@ -353,7 +390,7 @@ int tc_get_read_resp(uint8_t addr0, uint8_t addr1, uint32_t data)
expected[7] = data & 0xff;
expected[8] = EOR;
- return tc_get_resp(expected, sizeof(expected));
+ return tc_get_expected(expected, sizeof(expected));
}
int tc_write(uint8_t addr0, uint8_t addr1, uint32_t data)
@@ -385,7 +422,9 @@ int tc_wait(uint8_t addr0, uint8_t status)
do {
if (tc_send_read_cmd(addr0, ADDR_STATUS) != 0)
return 1;
- if (i2c_read(buf, 9) != 0)
+ if (tc_get_resp(buf, 9) != 0)
+ return 1;
+ if (buf[1] != READ_OK)
return 1;
} while ((buf[7] & status) != status);
@@ -869,7 +908,7 @@ int main(int argc, char *argv[])
int addr = I2C_addr;
int i, j, opt;
- while ((opt = getopt(argc, argv, "di:a:")) != -1) {
+ while ((opt = getopt(argc, argv, "h?di:a:")) != -1) {
switch (opt) {
case 'h':
case '?':
diff --git a/src/sw/hash_tester.py b/src/sw/hash_tester.py
index e2b3777..6a5ff0b 100755
--- a/src/sw/hash_tester.py
+++ b/src/sw/hash_tester.py
@@ -158,9 +158,6 @@ SHA512_DOUBLE_DIGEST = [ 0x8e959b75, 0xdae313da, 0x8cf4f728, 0x14fc143f,
0x501d289e, 0x4900f7e4, 0x331b99de, 0xc4b5433a,
0xc7d329ee, 0xb6dd2654, 0x5e96e55b, 0x874be909 ]
-def hexlist(list):
- return "[ " + ' '.join('%02x' % b for b in list) + " ]"
-
#----------------------------------------------------------------
# I2C class
#----------------------------------------------------------------
@@ -172,6 +169,9 @@ I2C_addr = 0x0f
# from /usr/include/linux/i2c-dev.h
I2C_SLAVE = 0x0703
+def hexlist(list):
+ return "[ " + ' '.join('%02x' % b for b in list) + " ]"
+
class I2C:
# file handle for the i2c device
file = None
@@ -202,15 +202,11 @@ class I2C:
print "write %s" % hexlist(buf)
self.file.write(bytearray(buf))
- # read 5 or 9 response bytes to a buffer
- def read(self, len):
- buf = []
- # read() on the i2c device will only return 1 byte at a time
- for i in range(len):
- buf.append(ord(self.file.read(1)))
- if DEBUG:
- print "read %s" % hexlist(buf)
- return buf
+ # read one response byte from the i2c device
+ def read(self):
+ # read() on the i2c device will only return one byte at a time,
+ # and tc.get_resp() needs to parse the response one byte at a time
+ return ord(self.file.read(1))
#----------------------------------------------------------------
# test-case class
@@ -221,12 +217,16 @@ SOC = 0x55
EOC = 0xaa
READ_CMD = 0x10
WRITE_CMD = 0x11
+RESET_CMD = 0x01
# response codes
SOR = 0xaa
EOR = 0x55
READ_OK = 0x7f
WRITE_OK = 0x7e
+RESET_OK = 0x7d
+UNKNOWN = 0xfe
+ERROR = 0xfd
class TcError(Exception):
pass
@@ -248,22 +248,46 @@ class tc:
buf = [SOC, READ_CMD, self.addr0, self.addr1, EOC]
self.i2c.write(buf)
- def get_resp(self, expected):
- buf = self.i2c.read(len(expected))
+ def get_resp(self):
+ buf = []
+ len = 2
+ i = 0
+ while i < len:
+ b = self.i2c.read()
+ if ((i == 0) and (b != SOR)):
+ # we've gotten out of sync, and there's probably nothing we can do
+ print "response byte 0: expected 0x%02x (SOR), got 0x%02x" % (SOR, b)
+ raise TcError()
+ elif (i == 1): # response code
+ try:
+ # anonymous dictionary of message lengths
+ len = {READ_OK:9, WRITE_OK:5, RESET_OK:3, ERROR:4, UNKNOWN:4}[b]
+ except KeyError: # unknown response code
+ # we've gotten out of sync, and there's probably nothing we can do
+ print "unknown response code 0x%02x" % b
+ raise TcError()
+ buf.append(b)
+ i += 1
+ if DEBUG:
+ print "read %s" % hexlist(buf)
+ return buf
+
+ def get_expected(self, expected):
+ buf = self.get_resp()
if (buf != expected):
print "expected %s,\nreceived %s" % (hexlist(expected), hexlist(buf))
raise TcError()
def get_write_resp(self):
expected = [SOR, WRITE_OK, self.addr0, self.addr1, EOR]
- self.get_resp(expected)
+ self.get_expected(expected)
def get_read_resp(self, data):
expected = [SOR, READ_OK, self.addr0, self.addr1]
for s in (24, 16, 8, 0):
expected.append(data >> s & 0xff)
expected.append(EOR)
- self.get_resp(expected)
+ self.get_expected(expected)
def write(self, data):
self.send_write_cmd(data)
@@ -289,7 +313,7 @@ def tc_wait(i2c, addr0, status):
t = tc(i2c, addr0, ADDR_STATUS)
while 1:
t.send_read_cmd()
- buf = t.i2c.read(9)
+ buf = t.get_resp()
if ((buf[7] & status) == status):
break
@@ -328,9 +352,9 @@ def sha1_wait_valid(i2c):
def TC1(i2c):
print "TC1: Reading name, type and version words from SHA-1 core."
- sha1_read(i2c, ADDR_NAME0, 0x73686131) # "sha1"
- sha1_read(i2c, ADDR_NAME1, 0x20202020) # " "
- sha1_read(i2c, ADDR_VERSION, 0x302e3530) # "0.50"
+ sha1_read(i2c, ADDR_NAME0, 0x73686131) # "sha1"
+ sha1_read(i2c, ADDR_NAME1, 0x20202020) # " "
+ sha1_read(i2c, ADDR_VERSION, 0x302e3530) # "0.50"
# TC2: SHA-1 Single block message test as specified by NIST.
def TC2(i2c):
@@ -413,9 +437,9 @@ def sha256_wait_valid(i2c):
def TC4(i2c):
print "TC4: Reading name, type and version words from SHA-256 core."
- sha256_read(i2c, ADDR_NAME0, 0x73686132) # "sha2"
- sha256_read(i2c, ADDR_NAME1, 0x2d323536) # "-256"
- sha256_read(i2c, ADDR_VERSION, 0x302e3830) # "0.80"
+ sha256_read(i2c, ADDR_NAME0, 0x73686132) # "sha2"
+ sha256_read(i2c, ADDR_NAME1, 0x2d323536) # "-256"
+ sha256_read(i2c, ADDR_VERSION, 0x302e3830) # "0.80"
# TC5: SHA-256 Single block message test as specified by NIST.
def TC5(i2c):
@@ -539,9 +563,9 @@ def sha512_wait_valid(i2c):
def TC8(i2c):
print "TC8: Reading name, type and version words from SHA-512 core."
- sha512_read(i2c, ADDR_NAME0, 0x73686132) # "sha2"
- sha512_read(i2c, ADDR_NAME1, 0x2d353132) # "-512"
- sha512_read(i2c, ADDR_VERSION, 0x302e3830) # "0.80"
+ sha512_read(i2c, ADDR_NAME0, 0x73686132) # "sha2"
+ sha512_read(i2c, ADDR_NAME1, 0x2d353132) # "-512"
+ sha512_read(i2c, ADDR_VERSION, 0x302e3830) # "0.80"
# TC9: SHA-512 Single block message test as specified by NIST.
# We do this for all modes.
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-02 20:39:03 +0000