diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2011-01-17 09:27:27 +0900 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2011-01-19 09:53:59 +1100 |
| commit | 154a96bfcd53b8e5020718c64769e542c44788b9 (patch) | |
| tree | 2fc7a4c8992fb4222a6fb47f22907a94da48eebd /security/keys/trusted_defined.c | |
| parent | 0e7491f685cbc962f2ef977f7b5f8ed0b3100e88 (diff) | |
| download | lwn-154a96bfcd53b8e5020718c64769e542c44788b9.tar.gz lwn-154a96bfcd53b8e5020718c64769e542c44788b9.zip | |
trusted-keys: avoid scattring va_end()
We can avoid scattering va_end() within the
va_start();
for (;;) {
}
va_end();
loop, assuming that crypto_shash_init()/crypto_shash_update() return 0 on
success and negative value otherwise.
Make TSS_authhmac()/TSS_checkhmac1()/TSS_checkhmac2() similar to TSS_rawhmac()
by removing "va_end()/goto" from the loop.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Jesper Juhl <jj@chaosbits.net>
Acked-by: Mimi Zohar <zohar@us.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/keys/trusted_defined.c')
| -rw-r--r-- | security/keys/trusted_defined.c | 30 |
1 files changed, 13 insertions, 17 deletions
diff --git a/security/keys/trusted_defined.c b/security/keys/trusted_defined.c index f7d06776faf0..2836c6dc18a3 100644 --- a/security/keys/trusted_defined.c +++ b/security/keys/trusted_defined.c @@ -150,17 +150,15 @@ static int TSS_authhmac(unsigned char *digest, const unsigned char *key, data = va_arg(argp, unsigned char *); if (!data) { ret = -EINVAL; - va_end(argp); - goto out; + break; } ret = crypto_shash_update(&sdesc->shash, data, dlen); - if (ret < 0) { - va_end(argp); - goto out; - } + if (ret < 0) + break; } va_end(argp); - ret = crypto_shash_final(&sdesc->shash, paramdigest); + if (!ret) + ret = crypto_shash_final(&sdesc->shash, paramdigest); if (!ret) ret = TSS_rawhmac(digest, key, keylen, SHA1_DIGEST_SIZE, paramdigest, TPM_NONCE_SIZE, h1, @@ -229,13 +227,12 @@ static int TSS_checkhmac1(unsigned char *buffer, break; dpos = va_arg(argp, unsigned int); ret = crypto_shash_update(&sdesc->shash, buffer + dpos, dlen); - if (ret < 0) { - va_end(argp); - goto out; - } + if (ret < 0) + break; } va_end(argp); - ret = crypto_shash_final(&sdesc->shash, paramdigest); + if (!ret) + ret = crypto_shash_final(&sdesc->shash, paramdigest); if (ret < 0) goto out; @@ -323,13 +320,12 @@ static int TSS_checkhmac2(unsigned char *buffer, break; dpos = va_arg(argp, unsigned int); ret = crypto_shash_update(&sdesc->shash, buffer + dpos, dlen); - if (ret < 0) { - va_end(argp); - goto out; - } + if (ret < 0) + break; } va_end(argp); - ret = crypto_shash_final(&sdesc->shash, paramdigest); + if (!ret) + ret = crypto_shash_final(&sdesc->shash, paramdigest); if (ret < 0) goto out; |