hash: Add function to find hash_algo struct with progressive hash
The hash_algo structure has some implementations in which progressive hash
API's are not defined. These are basically the hardware based implementations
of SHA. An API is added to find the algo which has progressive hash API's
defined. This can then be integrated with RSA checksum library which uses
Progressive Hash API's.
Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
CC: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/common/hash.c b/common/hash.c
index aceabc5..c4d8c3a 100644
--- a/common/hash.c
+++ b/common/hash.c
@@ -20,7 +20,7 @@
#include <asm/io.h>
#include <asm/errno.h>
-#ifdef CONFIG_CMD_SHA1SUM
+#ifdef CONFIG_SHA1
static int hash_init_sha1(struct hash_algo *algo, void **ctxp)
{
sha1_context *ctx = malloc(sizeof(sha1_context));
@@ -125,12 +125,7 @@
CHUNKSZ_SHA256,
},
#endif
- /*
- * This is CONFIG_CMD_SHA1SUM instead of CONFIG_SHA1 since otherwise
- * it bloats the code for boards which use SHA1 but not the 'hash'
- * or 'sha1sum' commands.
- */
-#ifdef CONFIG_CMD_SHA1SUM
+#ifdef CONFIG_SHA1
{
"sha1",
SHA1_SUM_LEN,
@@ -140,7 +135,6 @@
hash_update_sha1,
hash_finish_sha1,
},
-#define MULTI_HASH
#endif
#ifdef CONFIG_SHA256
{
@@ -152,7 +146,6 @@
hash_update_sha256,
hash_finish_sha256,
},
-#define MULTI_HASH
#endif
{
"crc32",
@@ -165,6 +158,10 @@
},
};
+#if defined(CONFIG_SHA256) || defined(CONFIG_CMD_SHA1SUM)
+#define MULTI_HASH
+#endif
+
#if defined(CONFIG_HASH_VERIFY) || defined(CONFIG_CMD_HASH)
#define MULTI_HASH
#endif
@@ -311,6 +308,24 @@
return -EPROTONOSUPPORT;
}
+int hash_progressive_lookup_algo(const char *algo_name,
+ struct hash_algo **algop)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hash_algo); i++) {
+ if (!strcmp(algo_name, hash_algo[i].name)) {
+ if (hash_algo[i].hash_init) {
+ *algop = &hash_algo[i];
+ return 0;
+ }
+ }
+ }
+
+ debug("Unknown hash algorithm '%s'\n", algo_name);
+ return -EPROTONOSUPPORT;
+}
+
void hash_show(struct hash_algo *algo, ulong addr, ulong len, uint8_t *output)
{
int i;
