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PKCS#7: fix use after free in wc_DecodeKtri

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This commit is contained in:
Chris Conlon
2016-12-14 09:15:45 -07:00
parent e5d1e3ae10
commit 55554b79a9
1 changed files with 9 additions and 5 deletions
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14
wolfcrypt/src/pkcs7.c
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@@ -2600,13 +2600,12 @@ static int wc_PKCS7_DecodeKtri(PKCS7* pkcs7, byte* pkiMsg, word32 pkiMsgSz,
} }
wc_FreeRsaKey(privKey); wc_FreeRsaKey(privKey);
#ifdef WOLFSSL_SMALL_STACK
XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(privKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
if (keySz <= 0 || outKey == NULL) { if (keySz <= 0 || outKey == NULL) {
ForceZero(encryptedKey, MAX_ENCRYPTED_KEY_SZ); ForceZero(encryptedKey, MAX_ENCRYPTED_KEY_SZ);
#ifdef WOLFSSL_SMALL_STACK
XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(privKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return keySz; return keySz;
} else { } else {
*decryptedKeySz = keySz; *decryptedKeySz = keySz;
@@ -2614,6 +2613,11 @@ static int wc_PKCS7_DecodeKtri(PKCS7* pkcs7, byte* pkiMsg, word32 pkiMsgSz,
ForceZero(encryptedKey, MAX_ENCRYPTED_KEY_SZ); ForceZero(encryptedKey, MAX_ENCRYPTED_KEY_SZ);
} }
#ifdef WOLFSSL_SMALL_STACK
XFREE(encryptedKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(privKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return 0; return 0;
} }