From 6f907b422e8f33a388ce66479da9f42c998dd656 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 7 May 2013 06:11:47 +0000 Subject: 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 --- common/hash.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'common') 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 #include #include +#include /* * 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[]) { -- cgit