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| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2011-09-20 11:23:52 -0400 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2011-09-20 23:26:05 -0400 |
| commit | 2684bf7f29cfb13ef2c60f3b3a53ee47d0db7022 (patch) | |
| tree | bbdc0709c643e58a22443ab086c6e4aa80329e17 | |
| parent | b78049831ffed65f0b4e61f69df14f3ab17922cb (diff) | |
| download | linux-3.10-2684bf7f29cfb13ef2c60f3b3a53ee47d0db7022.tar.gz linux-3.10-2684bf7f29cfb13ef2c60f3b3a53ee47d0db7022.tar.bz2 linux-3.10-2684bf7f29cfb13ef2c60f3b3a53ee47d0db7022.zip | |
trusted-keys: check hex2bin result
For each hex2bin call in trusted keys, check that the ascii hex string is
valid. On failure, return -EINVAL.
Changelog v1:
- hex2bin now returns an int
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
| -rw-r--r-- | security/keys/trusted.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/security/keys/trusted.c b/security/keys/trusted.c index 0c33e2ea1f3..0964fc23694 100644 --- a/security/keys/trusted.c +++ b/security/keys/trusted.c @@ -779,7 +779,10 @@ static int getoptions(char *c, struct trusted_key_payload *pay, opt->pcrinfo_len = strlen(args[0].from) / 2; if (opt->pcrinfo_len > MAX_PCRINFO_SIZE) return -EINVAL; - hex2bin(opt->pcrinfo, args[0].from, opt->pcrinfo_len); + res = hex2bin(opt->pcrinfo, args[0].from, + opt->pcrinfo_len); + if (res < 0) + return -EINVAL; break; case Opt_keyhandle: res = strict_strtoul(args[0].from, 16, &handle); @@ -791,12 +794,18 @@ static int getoptions(char *c, struct trusted_key_payload *pay, case Opt_keyauth: if (strlen(args[0].from) != 2 * SHA1_DIGEST_SIZE) return -EINVAL; - hex2bin(opt->keyauth, args[0].from, SHA1_DIGEST_SIZE); + res = hex2bin(opt->keyauth, args[0].from, + SHA1_DIGEST_SIZE); + if (res < 0) + return -EINVAL; break; case Opt_blobauth: if (strlen(args[0].from) != 2 * SHA1_DIGEST_SIZE) return -EINVAL; - hex2bin(opt->blobauth, args[0].from, SHA1_DIGEST_SIZE); + res = hex2bin(opt->blobauth, args[0].from, + SHA1_DIGEST_SIZE); + if (res < 0) + return -EINVAL; break; case Opt_migratable: if (*args[0].from == '0') @@ -860,7 +869,9 @@ static int datablob_parse(char *datablob, struct trusted_key_payload *p, p->blob_len = strlen(c) / 2; if (p->blob_len > MAX_BLOB_SIZE) return -EINVAL; - hex2bin(p->blob, c, p->blob_len); + ret = hex2bin(p->blob, c, p->blob_len); + if (ret < 0) + return -EINVAL; ret = getoptions(datablob, p, o); if (ret < 0) return ret; |