diff options
| author | Simon Glass <sjg@chromium.org> | 2013-05-07 06:11:47 +0000 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2013-05-14 15:37:24 -0400 |
| commit | 6f907b422e8f33a388ce66479da9f42c998dd656 (patch) | |
| tree | 9d1b4b767bf3d4be232c96b170f8eb13015718be /common | |
| parent | 134a65124d1316a043b1da515abddafcb9309714 (diff) | |
hash: Add a way to calculate a hash for any algortihm
Rather than needing to call one of many hashing algorithms in U-Boot,
provide a function hash_block() which handles this, and can support all
available hash algorithms.
Once we have md5 supported within hashing, we can use this function in
the FIT image code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common')
| -rw-r--r-- | common/hash.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/common/hash.c b/common/hash.c index c9ac33e2c4..fe19b735a1 100644 --- a/common/hash.c +++ b/common/hash.c @@ -30,6 +30,7 @@ #include <sha1.h> #include <sha256.h> #include <asm/io.h> +#include <asm/errno.h> /* * These are the hash algorithms we support. Chips which support accelerated @@ -238,6 +239,28 @@ static void show_hash(struct hash_algo *algo, ulong addr, ulong len, printf("%02x", output[i]); } +int hash_block(const char *algo_name, const void *data, unsigned int len, + uint8_t *output, int *output_size) +{ + struct hash_algo *algo; + + algo = find_hash_algo(algo_name); + if (!algo) { + debug("Unknown hash algorithm '%s'\n", algo_name); + return -EPROTONOSUPPORT; + } + if (output_size && *output_size < algo->digest_size) { + debug("Output buffer size %d too small (need %d bytes)", + *output_size, algo->digest_size); + return -ENOSPC; + } + if (output_size) + *output_size = algo->digest_size; + algo->hash_func_ws(data, len, output, algo->chunk_size); + + return 0; +} + int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { |