m

Author: peter-pycom

sha.py

@@ -0,0 +1,67 @@
+import hashlib, time
+
+
+sha_stress_running = None
+sha_stress_verbose = None
+
+def sha_test(lenght=100):
+    import machine
+    import hashlib
+
+    buf = bytearray()
+    for x in range(lenght//3):
+        buf += machine.rng().to_bytes(3, 'big')
+    # print(buf)
+
+    h = hashlib.sha256(buf)
+    # print(hex(buf[0]), hex(buf[-1]), h.digest())
+    return h.digest()
+
+def sha_stress(verbose=True):
+    global sha_stress_running, sha_stress_verbose
+    import machine
+    l = 20_000
+    sha_stress_running = True
+    sha_stress_verbose = verbose
+    print('sha_stress start', l)
+    while sha_stress_running:
+        t_ms = time.ticks_ms()
+        d = sha_test(l)
+        temp = (machine.temperature()-32)/1.8
+        t_s = (time.ticks_ms()-t_ms)/1000
+        sha_stress_verbose and print(time.time(), t_s, temp, len(d))
+        pybytes.send_signal(1,time.time())
+        pybytes.send_signal(2, temp)
+        pybytes.send_signal(3, t_s)
+    print('sha_stress end')
+
+def sha_hello():
+
+    t = time.time()
+    if t % 2:
+      msg = 'asdf'
+    else:
+      msg = 'jkl'
+    h = hashlib.sha256(msg)
+    print(msg, h.digest())
+
+    if t % 2:
+        msg = 'jkl'
+    else:
+        msg = 'asdf'
+    h = hashlib.sha256(msg)
+    # h.update(msg)
+    print(msg, h.digest())
+
+if __name__ == "__main__":
+    if False:
+        sha_stress()
+    else:
+        import _thread
+        _thread.start_new_thread(sha_stress, (False,))
+
+    if False:
+        sha_stress_running = False
+        sha_stress_verbose = False
+        sha_stress_verbose = True
+        pybytes.send_signal(1,time.time())