diff options
Diffstat (limited to 'lib_generic/sha1.c')
| -rw-r--r-- | lib_generic/sha1.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/lib_generic/sha1.c b/lib_generic/sha1.c index 08ffa6b9ba..69506592f7 100644 --- a/lib_generic/sha1.c +++ b/lib_generic/sha1.c @@ -309,6 +309,39 @@ void sha1_csum (unsigned char *input, int ilen, unsigned char output[20]) } /* + * 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); +} + +/* * Output = HMAC-SHA-1( input buffer, hmac key ) */ void sha1_hmac (unsigned char *key, int keylen, |