Re: [ima-evm-utils PATCH 05/12] Update cmd_verify_ima() to define and use a local list of public keys

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On 11/19/23 11:50, Mimi Zohar wrote:
Update the static verify_ima() fucntion definition to include "public_keys".

-> function

Replace calling init_public_keys() with the init_public_keys2() version.
Similarly replace ima_verify_signature() with the ima_verify_signature2()
version.

Free the local public keys list.

Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxxxxx>
---
  src/evmctl.c | 23 +++++++++++++----------
  1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/src/evmctl.c b/src/evmctl.c
index 4190913f0295..bf1f8f07e9ca 100644
--- a/src/evmctl.c
+++ b/src/evmctl.c
@@ -972,7 +972,7 @@ static int cmd_verify_evm(struct command *cmd)
  	return err;
  }
-static int verify_ima(const char *file)
+static int verify_ima(void *public_keys, const char *file)
  {
  	unsigned char sig[MAX_SIGNATURE_SIZE];
  	int len;
@@ -999,34 +999,37 @@ static int verify_ima(const char *file)
  		}
  	}
- return ima_verify_signature(file, sig, len, NULL, 0);
+	return ima_verify_signature2(public_keys, file, sig, len, NULL, 0);
  }
static int cmd_verify_ima(struct command *cmd)
  {
  	char *file = g_argv[optind++];
+	void *public_keys = NULL;
  	int err, fails = 0;
- if (imaevm_params.x509) {
-		if (imaevm_params.keyfile) /* Support multiple public keys */
-			init_public_keys(imaevm_params.keyfile);
-		else			   /* assume read pubkey from x509 cert */
-			init_public_keys("/etc/keys/x509_evm.der");
-	}
-
  	if (!file) {
  		log_err("Parameters missing\n");
  		print_usage(cmd);
  		return -1;
  	}
+ if (imaevm_params.x509) {
+		if (imaevm_params.keyfile) /* Support multiple public keys */
+			init_public_keys2(imaevm_params.keyfile, &public_keys);
+		else			   /* assume read pubkey from x509 cert */
+			init_public_keys2("/etc/keys/x509_evm.der", &public_keys);

You should probably check the return code of this function.

+	}
+
  	do {
-		err = verify_ima(file);
+		err = verify_ima(public_keys, file);
  		if (err)
  			fails++;
  		if (!err && imaevm_params.verbose >= LOG_INFO)
  			log_info("%s: verification is OK\n", file);
  	} while ((file = g_argv[optind++]));
+
+	free_public_keys(public_keys);
  	return fails > 0;
  }




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