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rsaenh: Be more careful about when to hash HMAC key material.

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This commit is contained in:
Juan Lang 2011-01-16 12:06:30 -08:00 committed by Alexandre Julliard
parent 786c57d323
commit 9f8d00889f
1 changed files with 2 additions and 1 deletions
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3
dlls/rsaenh/rsaenh.c
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@ -139,6 +139,7 @@ typedef struct tagKEYCONTAINER
#define RSAENH_HMAC_DEF_IPAD_CHAR 0x36
#define RSAENH_HMAC_DEF_OPAD_CHAR 0x5c
#define RSAENH_HMAC_DEF_PAD_LEN 64
#define RSAENH_HMAC_BLOCK_LEN 64
#define RSAENH_DES_EFFECTIVE_KEYLEN 56
#define RSAENH_DES_STORAGE_KEYLEN 64
#define RSAENH_3DES112_EFFECTIVE_KEYLEN 112
@ -2956,7 +2957,7 @@ static BOOL import_plaintext_key(HCRYPTPROV hProv, CONST BYTE *pbData,
*phKey = new_key(hProv, CALG_HMAC, 0, &pCryptKey);
if (*phKey == (HCRYPTKEY)INVALID_HANDLE_VALUE)
return FALSE;
if (*pKeyLen <= sizeof(pCryptKey->abKeyValue))
if (*pKeyLen <= RSAENH_MIN(sizeof(pCryptKey->abKeyValue), RSAENH_HMAC_BLOCK_LEN))
{
memcpy(pCryptKey->abKeyValue, pbKeyStream, *pKeyLen);
pCryptKey->dwKeyLen = *pKeyLen;