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authorHung-ying Tyan <tyanh@chromium.org>2014-03-03 12:19:28 +0100
committerTom Rini <trini@ti.com>2014-03-21 16:39:36 -0400
commitbf007ebb6f4b01af675782d23bacbddd17e1a627 (patch)
tree4af7e35d65c7332b6b9e8d7e8bec912d7b6e9193 /common/hash.c
parentdb1b5f3d20666ffd52d649a3bd6141989b596e3f (diff)
downloadtalos-obmc-uboot-bf007ebb6f4b01af675782d23bacbddd17e1a627.tar.gz
talos-obmc-uboot-bf007ebb6f4b01af675782d23bacbddd17e1a627.zip
gen: Add progressive hash API
Add hash_init(), hash_update() and hash_finish() to the hash_algo struct. Add hash_lookup_algo() to look up the struct given an algorithm name. Signed-off-by: Hung-ying Tyan <tyanh@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Heiko Schocher <hs@denx.de> Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common/hash.c')
-rw-r--r--common/hash.c116
1 files changed, 105 insertions, 11 deletions
diff --git a/common/hash.c b/common/hash.c
index 872cd85428..7627b84b45 100644
--- a/common/hash.c
+++ b/common/hash.c
@@ -12,6 +12,7 @@
#include <common.h>
#include <command.h>
+#include <malloc.h>
#include <hw_sha.h>
#include <hash.h>
#include <sha1.h>
@@ -19,6 +20,88 @@
#include <asm/io.h>
#include <asm/errno.h>
+#ifdef CONFIG_CMD_SHA1SUM
+static int hash_init_sha1(struct hash_algo *algo, void **ctxp)
+{
+ sha1_context *ctx = malloc(sizeof(sha1_context));
+ sha1_starts(ctx);
+ *ctxp = ctx;
+ return 0;
+}
+
+static int hash_update_sha1(struct hash_algo *algo, void *ctx, const void *buf,
+ unsigned int size, int is_last)
+{
+ sha1_update((sha1_context *)ctx, buf, size);
+ return 0;
+}
+
+static int hash_finish_sha1(struct hash_algo *algo, void *ctx, void *dest_buf,
+ int size)
+{
+ if (size < algo->digest_size)
+ return -1;
+
+ sha1_finish((sha1_context *)ctx, dest_buf);
+ free(ctx);
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_SHA256
+static int hash_init_sha256(struct hash_algo *algo, void **ctxp)
+{
+ sha256_context *ctx = malloc(sizeof(sha256_context));
+ sha256_starts(ctx);
+ *ctxp = ctx;
+ return 0;
+}
+
+static int hash_update_sha256(struct hash_algo *algo, void *ctx,
+ const void *buf, unsigned int size, int is_last)
+{
+ sha256_update((sha256_context *)ctx, buf, size);
+ return 0;
+}
+
+static int hash_finish_sha256(struct hash_algo *algo, void *ctx, void
+ *dest_buf, int size)
+{
+ if (size < algo->digest_size)
+ return -1;
+
+ sha256_finish((sha256_context *)ctx, dest_buf);
+ free(ctx);
+ return 0;
+}
+#endif
+
+static int hash_init_crc32(struct hash_algo *algo, void **ctxp)
+{
+ uint32_t *ctx = malloc(sizeof(uint32_t));
+ *ctx = 0;
+ *ctxp = ctx;
+ return 0;
+}
+
+static int hash_update_crc32(struct hash_algo *algo, void *ctx,
+ const void *buf, unsigned int size, int is_last)
+{
+ *((uint32_t *)ctx) = crc32(*((uint32_t *)ctx), buf, size);
+ return 0;
+}
+
+static int hash_finish_crc32(struct hash_algo *algo, void *ctx, void *dest_buf,
+ int size)
+{
+ if (size < algo->digest_size)
+ return -1;
+
+ *((uint32_t *)dest_buf) = *((uint32_t *)ctx);
+ free(ctx);
+ return 0;
+}
+
/*
* These are the hash algorithms we support. Chips which support accelerated
* crypto could perhaps add named version of these algorithms here. Note that
@@ -53,6 +136,9 @@ static struct hash_algo hash_algo[] = {
SHA1_SUM_LEN,
sha1_csum_wd,
CHUNKSZ_SHA1,
+ hash_init_sha1,
+ hash_update_sha1,
+ hash_finish_sha1,
},
#define MULTI_HASH
#endif
@@ -62,6 +148,9 @@ static struct hash_algo hash_algo[] = {
SHA256_SUM_LEN,
sha256_csum_wd,
CHUNKSZ_SHA256,
+ hash_init_sha256,
+ hash_update_sha256,
+ hash_finish_sha256,
},
#define MULTI_HASH
#endif
@@ -70,6 +159,9 @@ static struct hash_algo hash_algo[] = {
4,
crc32_wd_buf,
CHUNKSZ_CRC32,
+ hash_init_crc32,
+ hash_update_crc32,
+ hash_finish_crc32,
},
};
@@ -204,16 +296,19 @@ static int parse_verify_sum(struct hash_algo *algo, char *verify_str, u8 *vsum,
return 0;
}
-static struct hash_algo *find_hash_algo(const char *name)
+int hash_lookup_algo(const char *algo_name, struct hash_algo **algop)
{
int i;
for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
- if (!strcmp(name, hash_algo[i].name))
- return &hash_algo[i];
+ if (!strcmp(algo_name, hash_algo[i].name)) {
+ *algop = &hash_algo[i];
+ return 0;
+ }
}
- return NULL;
+ debug("Unknown hash algorithm '%s'\n", algo_name);
+ return -EPROTONOSUPPORT;
}
static void show_hash(struct hash_algo *algo, ulong addr, ulong len,
@@ -230,12 +325,12 @@ int hash_block(const char *algo_name, const void *data, unsigned int len,
uint8_t *output, int *output_size)
{
struct hash_algo *algo;
+ int ret;
+
+ ret = hash_lookup_algo(algo_name, &algo);
+ if (ret)
+ return ret;
- 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);
@@ -265,8 +360,7 @@ int hash_command(const char *algo_name, int flags, cmd_tbl_t *cmdtp, int flag,
u8 vsum[HASH_MAX_DIGEST_SIZE];
void *buf;
- algo = find_hash_algo(algo_name);
- if (!algo) {
+ if (hash_lookup_algo(algo_name, &algo)) {
printf("Unknown hash algorithm '%s'\n", algo_name);
return CMD_RET_USAGE;
}
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