[PATCH ima-evm-utils 2/3] ima-evm-utils: beautify the code to make it more readable

[Tianjia Zhang <tianjia.zhang@linux.alibaba.com>]

Use enum type instead of hard-coded numbers to improve code readability.

Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
---
 src/libimaevm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/libimaevm.c b/src/libimaevm.c
index a9419ee..8f2ebcf 100644
--- a/src/libimaevm.c
+++ b/src/libimaevm.c
@@ -579,7 +579,7 @@ static int get_hash_algo_from_sig(unsigned char *sig)
 {
 	uint8_t hashalgo;
 
-	if (sig[0] == 1) {
+	if (sig[0] == DIGSIG_VERSION_1) {
 		hashalgo = ((struct signature_hdr *)sig)->hash;
 
 		if (hashalgo >= DIGEST_ALGO_MAX)
@@ -593,7 +593,7 @@ static int get_hash_algo_from_sig(unsigned char *sig)
 		default:
 			return -1;
 		}
-	} else if (sig[0] == 2) {
+	} else if (sig[0] == DIGSIG_VERSION_2) {
 		hashalgo = ((struct signature_v2_hdr *)sig)->hash_algo;
 		if (hashalgo >= PKEY_HASH__LAST)
 			return -1;
@@ -625,7 +625,7 @@ int ima_verify_signature(const char *file, unsigned char *sig, int siglen,
 	unsigned char hash[MAX_DIGEST_SIZE];
 	int hashlen, sig_hash_algo;
 
-	if (sig[0] != 0x03) {
+	if (sig[0] != EVM_IMA_XATTR_DIGSIG) {
 		log_err("xattr ima has no signature\n");
 		return -1;
 	}
-- 
2.17.1