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Check rng return value when generating key and IV in PKCS#7 wrapper

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This commit is contained in:
Tobias Brunner
2012-07-16 14:53:35 +02:00
committed by Martin Willi
parent f1c78cfee7
commit 3c73911174
1 changed files with 14 additions and 2 deletions
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src/libstrongswan/crypto/pkcs7.c
+14 -2
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@@ -787,12 +787,24 @@ METHOD(pkcs7_t, build_envelopedData, bool,
rng_t *rng; rng_t *rng;
rng = lib->crypto->create_rng(lib->crypto, RNG_TRUE); rng = lib->crypto->create_rng(lib->crypto, RNG_TRUE);
rng->allocate_bytes(rng, crypter->get_key_size(crypter), &symmetricKey); if (!rng || !rng->allocate_bytes(rng, crypter->get_key_size(crypter),
&symmetricKey))
{
DBG1(DBG_LIB, " failed to allocate symmetric encryption key");
DESTROY_IF(rng);
return FALSE;
}
DBG4(DBG_LIB, " symmetric encryption key: %B", &symmetricKey); DBG4(DBG_LIB, " symmetric encryption key: %B", &symmetricKey);
rng->destroy(rng); rng->destroy(rng);
rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK); rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK);
rng->allocate_bytes(rng, crypter->get_iv_size(crypter), &iv); if (!rng || !rng->allocate_bytes(rng, crypter->get_iv_size(crypter),
&iv))
{
DBG1(DBG_LIB, " failed to allocate initialization vector");
DESTROY_IF(rng);
return FALSE;
}
DBG4(DBG_LIB, " initialization vector: %B", &iv); DBG4(DBG_LIB, " initialization vector: %B", &iv);
rng->destroy(rng); rng->destroy(rng);
} }