crypto: ux500 - Use precalculated hash from headers

Precalculated hash for empty message are now present in hash headers.
This patch just use them.

Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

2 files changed, 4 insertions, 18 deletions

diff --git a/drivers/crypto/ux500/Kconfig b/drivers/crypto/ux500/Kconfig
index 30796441b0a6..0e338bf6dfb7 100644
--- a/drivers/crypto/ux500/Kconfig
+++ b/drivers/crypto/ux500/Kconfig
@@ -18,6 +18,8 @@ config CRYPTO_DEV_UX500_HASH
         tristate "UX500 crypto driver for HASH block"
         depends on CRYPTO_DEV_UX500
         select CRYPTO_HASH
+        select CRYPTO_SHA1
+        select CRYPTO_SHA256
         help
           This selects the hash driver for the UX500_HASH hardware.
           Depends on UX500/STM DMA if running in DMA mode.
diff --git a/drivers/crypto/ux500/hash/hash_core.c b/drivers/crypto/ux500/hash/hash_core.c
index f47d112041b2..d6fdc583ce5d 100644
--- a/drivers/crypto/ux500/hash/hash_core.c
+++ b/drivers/crypto/ux500/hash/hash_core.c
@@ -41,22 +41,6 @@ static int hash_mode;
 module_param(hash_mode, int, 0);
 MODULE_PARM_DESC(hash_mode, "CPU or DMA mode. CPU = 0 (default), DMA = 1");
 
-/**
- * Pre-calculated empty message digests.
- */
-static const u8 zero_message_hash_sha1[SHA1_DIGEST_SIZE] = {
-        0xda, 0x39, 0xa3, 0xee, 0x5e, 0x6b, 0x4b, 0x0d,
-        0x32, 0x55, 0xbf, 0xef, 0x95, 0x60, 0x18, 0x90,
-        0xaf, 0xd8, 0x07, 0x09
-};
-
-static const u8 zero_message_hash_sha256[SHA256_DIGEST_SIZE] = {
-        0xe3, 0xb0, 0xc4, 0x42, 0x98, 0xfc, 0x1c, 0x14,
-        0x9a, 0xfb, 0xf4, 0xc8, 0x99, 0x6f, 0xb9, 0x24,
-        0x27, 0xae, 0x41, 0xe4, 0x64, 0x9b, 0x93, 0x4c,
-        0xa4, 0x95, 0x99, 0x1b, 0x78, 0x52, 0xb8, 0x55
-};
-
 /* HMAC-SHA1, no key */
 static const u8 zero_message_hmac_sha1[SHA1_DIGEST_SIZE] = {
         0xfb, 0xdb, 0x1d, 0x1b, 0x18, 0xaa, 0x6c, 0x08,
@@ -242,13 +226,13 @@ static int get_empty_message_digest(
 
         if (HASH_OPER_MODE_HASH == ctx->config.oper_mode) {
                 if (HASH_ALGO_SHA1 == ctx->config.algorithm) {
-                        memcpy(zero_hash, &zero_message_hash_sha1[0],
+                        memcpy(zero_hash, &sha1_zero_message_hash[0],
                                SHA1_DIGEST_SIZE);
                         *zero_hash_size = SHA1_DIGEST_SIZE;
                         *zero_digest = true;
                 } else if (HASH_ALGO_SHA256 ==
                                 ctx->config.algorithm) {
-                        memcpy(zero_hash, &zero_message_hash_sha256[0],
+                        memcpy(zero_hash, &sha256_zero_message_hash[0],
                                SHA256_DIGEST_SIZE);
                         *zero_hash_size = SHA256_DIGEST_SIZE;
                         *zero_digest = true;