+/*
+ * Output = SHA-1( input buffer ). Trigger the watchdog every 'chunk_sz'
+ * bytes of input processed.
+ */
+void sha1_csum_wd (unsigned char *input, int ilen, unsigned char output[20],
+ unsigned int chunk_sz)
+{
+ sha1_context ctx;
+#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
+ unsigned char *end, *curr;
+ int chunk;
+#endif
+
+ sha1_starts (&ctx);
+
+#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
+ curr = input;
+ end = input + ilen;
+ while (curr < end) {
+ chunk = end - curr;
+ if (chunk > chunk_sz)
+ chunk = chunk_sz;
+ sha1_update (&ctx, curr, chunk);
+ curr += chunk;
+ WATCHDOG_RESET ();
+ }
+#else
+ sha1_update (&ctx, input, ilen);
+#endif
+
+ sha1_finish (&ctx, output);
+}
+