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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>
This commit is contained in:
Tetsuo Handa 2011-01-17 09:27:27 +09:00 committed by James Morris
parent 0e7491f685
commit 154a96bfcd
1 changed files with 13 additions and 17 deletions
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30
security/keys/trusted_defined.c
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@ -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;