[ima-evm-utils PATCH v3 04/13] Update imaevm_verify_hash() definition to include "hash_algo" parameter

[Mimi Zohar <zohar@linux.ibm.com>]

Instead of relying on a global static "hash_algo" variable, which is not
concurrency-safe, update the imaevm_verify_hash() function definition
and callers to include a "hash_algo" parameter as a place holder.

Now with the "hash_algo" parameter, export the imaevm_verify_hash()
definition.

Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
---
 src/imaevm.h    |  3 +++
 src/libimaevm.c | 15 ++++++++-------
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/imaevm.h b/src/imaevm.h
index 4fd421f5cd1d..0b86d28944b3 100644
--- a/src/imaevm.h
+++ b/src/imaevm.h
@@ -261,6 +261,9 @@ IMAEVM_DEPRECATED int ima_verify_signature(const char *file, unsigned char *sig,
 					   int digestlen);
 IMAEVM_DEPRECATED void init_public_keys(const char *keyfiles);
 
+int imaevm_verify_hash(struct public_key_entry *public_keys, const char *file,
+		       const char *hash_algo, const unsigned char *hash,
+		       int size, unsigned char *sig, int siglen);
 int ima_verify_signature2(struct public_key_entry *public_keys, const char *file,
 			  unsigned char *sig, int siglen,
 			  unsigned char *digest, int digestlen);
diff --git a/src/libimaevm.c b/src/libimaevm.c
index 9cc83e071610..a5e9fd5080ac 100644
--- a/src/libimaevm.c
+++ b/src/libimaevm.c
@@ -729,9 +729,9 @@ int imaevm_hash_algo_from_sig(unsigned char *sig)
 		return -1;
 }
 
-int imaevm_verify_hash(void *public_keys, const char *file,
-		       const unsigned char *hash, int size,
-		       unsigned char *sig, int siglen)
+int imaevm_verify_hash(struct public_key_entry *public_keys, const char *file,
+		       const char *hash_algo, const unsigned char *hash,
+		       int size, unsigned char *sig, int siglen)
 {
 	/* Get signature type from sig header */
 	if (sig[1] == DIGSIG_VERSION_1) {
@@ -762,7 +762,8 @@ int imaevm_verify_hash(void *public_keys, const char *file,
 int verify_hash(const char *file, const unsigned char *hash, int size,
 		unsigned char *sig, int siglen)
 {
-	return imaevm_verify_hash(g_public_keys, file, hash, size, sig, siglen);
+	return imaevm_verify_hash(g_public_keys, file, NULL, hash, size,
+				  sig, siglen);
 }
 
 int ima_verify_signature2(struct public_key_entry *public_keys, const char *file,
@@ -795,15 +796,15 @@ int ima_verify_signature2(struct public_key_entry *public_keys, const char *file
 	 * measurement list, not by calculating the local file digest.
 	 */
 	if (digest && digestlen > 0)
-		return imaevm_verify_hash(public_keys, file, digest, digestlen,
-					  sig, siglen);
+		return imaevm_verify_hash(public_keys, file, NULL, digest,
+					  digestlen, sig, siglen);
 
 	hashlen = ima_calc_hash(file, hash);
 	if (hashlen <= 1)
 		return hashlen;
 	assert(hashlen <= sizeof(hash));
 
-	return imaevm_verify_hash(public_keys, file, hash, hashlen,
+	return imaevm_verify_hash(public_keys, file, NULL, hash, hashlen,
 				  sig, siglen);
 }
 
-- 
2.39.3