From 154a96bfcd53b8e5020718c64769e542c44788b9 Mon Sep 17 00:00:00 2001 From: Tetsuo Handa Date: Mon, 17 Jan 2011 09:27:27 +0900 Subject: [PATCH] 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 Reviewed-by: Jesper Juhl Acked-by: Mimi Zohar Acked-by: David Howells Signed-off-by: James Morris --- security/keys/trusted_defined.c | 30 +++++++++++++----------------- 1 file 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;