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crypto: use auto cleanup for many stack variables

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Simplify cleanup paths by using glib's auto cleanup macros for stack
variables, allowing several goto jumps / labels to be eliminated.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2019-07-23 16:22:36 +01:00
parent 133cf1e5b1
commit 57b9f113fc
8 changed files with 65 additions and 133 deletions
Download patch file Download diff file Expand all files Collapse all files

28
crypto/afsplit.c
View file

@ -58,7 +58,7 @@ static int qcrypto_afsplit_hash(QCryptoHashAlgorithm hash,
}
for (i = 0; i < hashcount; i++) {
uint8_t *out = NULL;
g_autofree uint8_t *out = NULL;
size_t outlen = 0;
uint32_t iv = cpu_to_be32(i);
struct iovec in[] = {
@ -79,7 +79,6 @@ static int qcrypto_afsplit_hash(QCryptoHashAlgorithm hash,
assert(outlen == digestlen);
memcpy(block + (i * digestlen), out,
(i == (hashcount - 1)) ? finallen : digestlen);
g_free(out);
}
return 0;
@ -93,13 +92,12 @@ int qcrypto_afsplit_encode(QCryptoHashAlgorithm hash,
uint8_t *out,
Error **errp)
{
uint8_t *block = g_new0(uint8_t, blocklen);
g_autofree uint8_t *block = g_new0(uint8_t, blocklen);
size_t i;
int ret = -1;
for (i = 0; i < (stripes - 1); i++) {
if (qcrypto_random_bytes(out + (i * blocklen), blocklen, errp) < 0) {
goto cleanup;
return -1;
}
qcrypto_afsplit_xor(blocklen,
@ -108,18 +106,14 @@ int qcrypto_afsplit_encode(QCryptoHashAlgorithm hash,
block);
if (qcrypto_afsplit_hash(hash, blocklen, block,
errp) < 0) {
goto cleanup;
return -1;
}
}
qcrypto_afsplit_xor(blocklen,
in,
block,
out + (i * blocklen));
ret = 0;
cleanup:
g_free(block);
return ret;
return 0;
}
@ -130,9 +124,8 @@ int qcrypto_afsplit_decode(QCryptoHashAlgorithm hash,
uint8_t *out,
Error **errp)
{
uint8_t *block = g_new0(uint8_t, blocklen);
g_autofree uint8_t *block = g_new0(uint8_t, blocklen);
size_t i;
int ret = -1;
for (i = 0; i < (stripes - 1); i++) {
qcrypto_afsplit_xor(blocklen,
@ -141,7 +134,7 @@ int qcrypto_afsplit_decode(QCryptoHashAlgorithm hash,
block);
if (qcrypto_afsplit_hash(hash, blocklen, block,
errp) < 0) {
goto cleanup;
return -1;
}
}
@ -149,10 +142,5 @@ int qcrypto_afsplit_decode(QCryptoHashAlgorithm hash,
in + (i * blocklen),
block,
out);
ret = 0;
cleanup:
g_free(block);
return ret;
return 0;
}