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Refactor tmpF in RsaMGF1

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This commit is contained in:
Tesfa Mael
2022-05-06 16:14:47 -07:00
parent ad2119b2f8
commit 74b3df4f6c
1 changed files with 4 additions and 3 deletions
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7
wolfcrypt/src/rsa.c
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@@ -855,12 +855,12 @@ static int RsaMGF1(enum wc_HashType hType, byte* seed, word32 seedSz,
{
#if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_NO_MALLOC)
byte* tmp = NULL;
byte tmpF = 0; /* 1 if dynamic memory needs freed */
#else
byte tmp[RSA_MAX_SIZE/8];
#endif
/* needs to be large enough for seed size plus counter(4) */
byte tmpA[WC_MAX_DIGEST_SIZE + 4];
byte tmpF = 0; /* 1 if dynamic memory needs freed */
word32 tmpSz = 0;
int hLen;
int ret;
@@ -903,8 +903,8 @@ static int RsaMGF1(enum wc_HashType hType, byte* seed, word32 seedSz,
#endif
#if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_NO_MALLOC)
tmp = tmpA;
#endif
tmpF = 0; /* no need to free memory at end */
#endif
}
#ifdef WOLFSSL_SMALL_STACK_CACHE
@@ -959,11 +959,12 @@ static int RsaMGF1(enum wc_HashType hType, byte* seed, word32 seedSz,
}
counter++;
} while (idx < outSz);
#if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_NO_MALLOC)
/* check for if dynamic memory was needed, then free */
if (tmpF) {
XFREE(tmp, heap, DYNAMIC_TYPE_RSA_BUFFER);
}
#endif
#ifdef WOLFSSL_SMALL_STACK_CACHE
wc_HashFree(hash, hType);
XFREE(hash, heap, DYNAMIC_TYPE_DIGEST);