linux-kernel - [RFC][PATCH v2 2/6] encrypted-keys: added additional debug messages

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1293533302-22868-3-git-send-email-roberto.sassu@polito.it>
Date:	Tue, 28 Dec 2010 11:48:12 +0100
From:	Roberto Sassu <roberto.sassu@...ito.it>
To:	linux-security-module@...r.kernel.org
Cc:	keyrings@...ux-nfs.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org, zohar@...ux.vnet.ibm.com,
	dhowells@...hat.com, jmorris@...ei.org, safford@...son.ibm.com,
	ramunno@...ito.it, tyhicks@...ux.vnet.ibm.com,
	kirkland@...onical.com, Roberto Sassu <roberto.sassu@...ito.it>
Subject: [RFC][PATCH v2 2/6] encrypted-keys: added additional debug messages

Some debug messages have been added in the function datablob_parse() in
order to better identify errors returned when dealing with 'encrypted'
keys.

Signed-off-by: Roberto Sassu <roberto.sassu@...ito.it>
---
 security/keys/encrypted_defined.c |   44 +++++++++++++++++++++++++++---------
 1 files changed, 33 insertions(+), 11 deletions(-)

diff --git a/security/keys/encrypted_defined.c b/security/keys/encrypted_defined.c
index c1c5e27..0f3c159 100644
--- a/security/keys/encrypted_defined.c
+++ b/security/keys/encrypted_defined.c
@@ -133,46 +133,68 @@ static int datablob_parse(char *datablob, char **master_desc,
 	substring_t args[MAX_OPT_ARGS];
 	int ret = -EINVAL;
 	int key_cmd;
-	char *p;
+	char *keyword;
 
-	p = strsep(&datablob, " \t");
-	if (!p)
+	keyword = strsep(&datablob, " \t");
+	if (!keyword) {
+		pr_err("encrypted_key: insufficient parameters specified\n");
 		return ret;
-	key_cmd = match_token(p, key_tokens, args);
+	}
+	key_cmd = match_token(keyword, key_tokens, args);
 
 	*master_desc = strsep(&datablob, " \t");
-	if (!*master_desc)
+	if (!*master_desc) {
+		pr_err("encrypted_key: master key parameter is missing\n");
 		goto out;
+	}
 
-	if (valid_master_desc(*master_desc, NULL) < 0)
+	if (valid_master_desc(*master_desc, NULL) < 0) {
+		pr_err("encrypted_key: master key parameter \'%s\' "
+		       "is invalid\n", *master_desc);
 		goto out;
+	}
 
 	if (decrypted_datalen) {
 		*decrypted_datalen = strsep(&datablob, " \t");
-		if (!*decrypted_datalen)
+		if (!*decrypted_datalen) {
+			pr_err("encrypted_key: keylen parameter is missing\n");
 			goto out;
+		}
 	}
 
 	switch (key_cmd) {
 	case Opt_new:
-		if (!decrypted_datalen)
+		if (!decrypted_datalen) {
+			pr_err("encrypted_key: keyword \'%s\' not allowed when "
+			       "updating an existent key\n", keyword);
 			break;
+		}
 		ret = 0;
 		break;
 	case Opt_load:
-		if (!decrypted_datalen)
+		if (!decrypted_datalen) {
+			pr_err("encrypted_key: keyword \'%s\' not allowed when "
+			       "updating an existent key\n", keyword);
 			break;
+		}
 		*hex_encoded_iv = strsep(&datablob, " \t");
-		if (!*hex_encoded_iv)
+		if (!*hex_encoded_iv) {
+			pr_err("encrypted_key: hex blob is missing\n");
 			break;
+		}
 		ret = 0;
 		break;
 	case Opt_update:
-		if (decrypted_datalen)
+		if (decrypted_datalen) {
+			pr_err("encrypted_key: keyword \'%s\' not allowed when "
+			       "instantiating a new key\n", keyword);
 			break;
+		}
 		ret = 0;
 		break;
 	case Opt_err:
+		pr_err("encrypted_key: keyword \'%s\' not recognized\n",
+		       keyword);
 		break;
 	}
 out:
-- 
1.7.2.3


Download attachment "smime.p7s" of type "application/x-pkcs7-signature" (2061 bytes)