[PATCH v6 05/11] ima-evm-utils: Start converting find_keyid to EVP_PKEY API

[Vitaly Chikunov <vt@xxxxxxxxxxxx>]

New find_keyid_pkey() accepts EVP_PKEY. Old find_keyid() calls
find_keyid_pkey(), but still return RSA key.

Signed-off-by: Vitaly Chikunov <vt@xxxxxxxxxxxx>
---
 src/libimaevm.c | 24 ++++++++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/src/libimaevm.c b/src/libimaevm.c
index 707b2e9..ae18005 100644
--- a/src/libimaevm.c
+++ b/src/libimaevm.c
@@ -452,11 +452,11 @@ struct public_key_entry {
 	struct public_key_entry *next;
 	uint32_t keyid;
 	char name[9];
-	RSA *key;
+	EVP_PKEY *key;
 };
 static struct public_key_entry *public_keys = NULL;
 
-static RSA *find_keyid(uint32_t keyid)
+static EVP_PKEY *find_keyid_pkey(uint32_t keyid)
 {
 	struct public_key_entry *entry;
 
@@ -467,6 +467,22 @@ static RSA *find_keyid(uint32_t keyid)
 	return NULL;
 }
 
+static RSA *find_keyid(uint32_t keyid)
+{
+	EVP_PKEY *pkey;
+	RSA *key;
+
+	pkey = find_keyid_pkey(keyid);
+	if (!pkey)
+		return NULL;
+	key = EVP_PKEY_get0_RSA(pkey);
+	if (!key) {
+		log_err("find_keyid: unsupported key type\n");
+		return NULL;
+	}
+	return key;
+}
+
 void init_public_keys(const char *keyfiles)
 {
 	struct public_key_entry *entry;
@@ -489,13 +505,13 @@ void init_public_keys(const char *keyfiles)
 			break;
 		}
 
-		entry->key = read_pub_key(keyfile, 1);
+		entry->key = read_pub_pkey(keyfile, 1);
 		if (!entry->key) {
 			free(entry);
 			continue;
 		}
 
-		calc_keyid_v2(&entry->keyid, entry->name, entry->key);
+		calc_pkeyid_v2(&entry->keyid, entry->name, entry->key);
 		sprintf(entry->name, "%x", __be32_to_cpup(&entry->keyid));
 		log_info("key %d: %s %s\n", i++, entry->name, keyfile);
 		entry->next = public_keys;
-- 
2.11.0