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add ForceZero() to force memset(0)

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toddouska
2015-02-20 15:51:21 -08:00
parent 732a0dd39a
commit 608da64ece
15 changed files with 105 additions and 70 deletions
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19
wolfcrypt/src/rsa.c
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@@ -125,6 +125,11 @@ int wc_RsaFlattenPublicKey(RsaKey* key, byte* a, word32* aSz, byte* b,
#include <wolfssl/wolfcrypt/random.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#include <wolfssl/wolfcrypt/logging.h>
#ifdef NO_INLINE
#include <wolfssl/wolfcrypt/misc.h>
#else
#include <wolfcrypt/src/misc.c>
#endif
#ifdef SHOW_GEN
#ifdef FREESCALE_MQX
@@ -467,9 +472,10 @@ int wc_RsaPrivateDecrypt(const byte* in, word32 inLen, byte* out, word32 outLen,
plainLen = BAD_FUNC_ARG;
else
XMEMCPY(out, pad, plainLen);
XMEMSET(tmp, 0x00, inLen);
ForceZero(tmp, inLen);
XFREE(tmp, key->heap, DYNAMIC_TYPE_RSA);
return plainLen;
}
@@ -523,11 +529,12 @@ int wc_RsaSSL_Verify(const byte* in, word32 inLen, byte* out, word32 outLen,
if (plainLen > (int)outLen)
plainLen = BAD_FUNC_ARG;
else
else
XMEMCPY(out, pad, plainLen);
XMEMSET(tmp, 0x00, inLen);
ForceZero(tmp, inLen);
XFREE(tmp, key->heap, DYNAMIC_TYPE_RSA);
return plainLen;
}
@@ -660,11 +667,9 @@ static int rand_prime(mp_int* N, int len, RNG* rng, void* heap)
}
} while (res == MP_NO);
#ifdef LTC_CLEAN_STACK
XMEMSET(buf, 0, len);
#endif
ForceZero(buf, len);
XFREE(buf, heap, DYNAMIC_TYPE_RSA);
return 0;
}