[PATCH 2/3] fit: Use hash.c to call SHA code

[Joel Stanley]

Currently the FIT hashing will call directly into the SHA algorithms to
get a hash.

This moves the fit code to use hash_lookup_algo, giving a common
entrypoint into the hashing code and removing the duplicated algorithm
look up. It also allows the use of hardware acceleration if configured.

Signed-off-by: Joel Stanley <joel at jms.id.au>
---
 common/image-fit.c | 34 ++++++++--------------------------
 1 file changed, 8 insertions(+), 26 deletions(-)

diff --git a/common/image-fit.c b/common/image-fit.c
index 28b3d2b19111..3451cdecc95b 100644
--- a/common/image-fit.c
+++ b/common/image-fit.c
@@ -1210,37 +1210,19 @@ int fit_set_timestamp(void *fit, int noffset, time_t timestamp)
  *     0, on success
  *    -1, when algo is unsupported
  */
-int calculate_hash(const void *data, int data_len, const char *algo,
+int calculate_hash(const void *data, int data_len, const char *algo_name,
 			uint8_t *value, int *value_len)
 {
-	if (IMAGE_ENABLE_CRC32 && strcmp(algo, "crc32") == 0) {
-		*((uint32_t *)value) = crc32_wd(0, data, data_len,
-							CHUNKSZ_CRC32);
-		*((uint32_t *)value) = cpu_to_uimage(*((uint32_t *)value));
-		*value_len = 4;
-	} else if (IMAGE_ENABLE_SHA1 && strcmp(algo, "sha1") == 0) {
-		sha1_csum_wd((unsigned char *)data, data_len,
-			     (unsigned char *)value, CHUNKSZ_SHA1);
-		*value_len = 20;
-	} else if (IMAGE_ENABLE_SHA256 && strcmp(algo, "sha256") == 0) {
-		sha256_csum_wd((unsigned char *)data, data_len,
-			       (unsigned char *)value, CHUNKSZ_SHA256);
-		*value_len = SHA256_SUM_LEN;
-	} else if (IMAGE_ENABLE_SHA384 && strcmp(algo, "sha384") == 0) {
-		sha384_csum_wd((unsigned char *)data, data_len,
-			       (unsigned char *)value, CHUNKSZ_SHA384);
-		*value_len = SHA384_SUM_LEN;
-	} else if (IMAGE_ENABLE_SHA512 && strcmp(algo, "sha512") == 0) {
-		sha512_csum_wd((unsigned char *)data, data_len,
-			       (unsigned char *)value, CHUNKSZ_SHA512);
-		*value_len = SHA512_SUM_LEN;
-	} else if (IMAGE_ENABLE_MD5 && strcmp(algo, "md5") == 0) {
-		md5_wd((unsigned char *)data, data_len, value, CHUNKSZ_MD5);
-		*value_len = 16;
-	} else {
+	struct hash_algo *algo;
+
+	if (hash_lookup_algo(algo_name, &algo)) {
 		debug("Unsupported hash alogrithm\n");
 		return -1;
 	}
+
+	algo->hash_func_ws(data, data_len, value, algo->chunk_size);
+	*value_len = algo->digest_size;
+
 	return 0;
 }
 
-- 
2.30.0