diff options
author | Simon Glass <sjg@chromium.org> | 2012-12-05 18:46:34 +0400 |
---|---|---|
committer | Tom Rini <trini@ti.com> | 2012-12-12 00:17:33 +0400 |
commit | ec7381fbf6f77cc465eb06a1ab6f8a99df1e487c (patch) | |
tree | d352d38e00ee2cc7d404daa88842435df53a97d9 /lib | |
parent | a7d1d765793a05c0d6f7547122339dbecc94f6c3 (diff) | |
download | u-boot-ec7381fbf6f77cc465eb06a1ab6f8a99df1e487c.tar.xz |
sha256: Use const where possible and add watchdog function
In preparation for making the hash function common, we may as well use
const where we can.
Also add a watchdog version of the hashing function.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib')
-rw-r--r-- | lib/sha256.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/lib/sha256.c b/lib/sha256.c index deb63a40b6..ab2db4890a 100644 --- a/lib/sha256.c +++ b/lib/sha256.c @@ -60,7 +60,7 @@ void sha256_starts(sha256_context * ctx) ctx->state[7] = 0x5BE0CD19; } -void sha256_process(sha256_context * ctx, uint8_t data[64]) +static void sha256_process(sha256_context *ctx, const uint8_t data[64]) { uint32_t temp1, temp2; uint32_t W[64]; @@ -191,7 +191,7 @@ void sha256_process(sha256_context * ctx, uint8_t data[64]) ctx->state[7] += H; } -void sha256_update(sha256_context * ctx, uint8_t * input, uint32_t length) +void sha256_update(sha256_context *ctx, const uint8_t *input, uint32_t length) { uint32_t left, fill; @@ -260,3 +260,36 @@ void sha256_finish(sha256_context * ctx, uint8_t digest[32]) PUT_UINT32_BE(ctx->state[6], digest, 24); PUT_UINT32_BE(ctx->state[7], digest, 28); } + +/* + * Output = SHA-256( input buffer ). Trigger the watchdog every 'chunk_sz' + * bytes of input processed. + */ +void sha256_csum_wd(const unsigned char *input, unsigned int ilen, + unsigned char *output, unsigned int chunk_sz) +{ + sha256_context ctx; +#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) + unsigned char *end, *curr; + int chunk; +#endif + + sha256_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; + sha256_update(&ctx, curr, chunk); + curr += chunk; + WATCHDOG_RESET(); + } +#else + sha256_update(&ctx, input, ilen); +#endif + + sha256_finish(&ctx, output); +} |