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re-introduce old nss im too tired for this

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wuggy 2026-06-30 06:37:32 +01:00
commit 3a838106b9
2871 changed files with 1374431 additions and 1762417 deletions
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30
security/nss/lib/freebl/hmacct.c
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@ -16,19 +16,34 @@
* field. (SHA-384/512 have 128-bit length.) */
#define MAX_HASH_BIT_COUNT_BYTES 16
/* Some utility functions are needed:
*
* These macros return the given value with the MSB copied to all the other
* bits. They use the fact that an arithmetic shift shifts-in the sign bit.
* However, this is not ensured by the C standard so you may need to replace
* them with something else on odd CPUs.
*
* Note: the argument to these macros must be an unsigned int.
* */
#define DUPLICATE_MSB_TO_ALL(x) ((unsigned int)((int)(x) >> (sizeof(int) * 8 - 1)))
#define DUPLICATE_MSB_TO_ALL_8(x) ((unsigned char)(DUPLICATE_MSB_TO_ALL(x)))
/* constantTimeGE returns 0xff if a>=b and 0x00 otherwise, where a, b <
* MAX_UINT/2. */
static unsigned char
constantTimeGE(unsigned int a, unsigned int b)
{
return PORT_CT_GE(a, b);
a -= b;
return DUPLICATE_MSB_TO_ALL(~a);
}
/* constantTimeEQ8 returns 0xff if a==b and 0x00 otherwise. */
static unsigned char
constantTimeEQ(unsigned char a, unsigned char b)
constantTimeEQ8(unsigned char a, unsigned char b)
{
return PORT_CT_EQ(a, b);
unsigned int c = a ^ b;
c--;
return DUPLICATE_MSB_TO_ALL_8(c);
}
/* MAC performs a constant time SSLv3/TLS MAC of |dataLen| bytes of |data|,
@ -208,8 +223,8 @@ MAC(unsigned char *mdOut,
* constant time, to |macOut|. */
for (i = numStartingBlocks; i <= numStartingBlocks + varianceBlocks; i++) {
unsigned char block[HASH_BLOCK_LENGTH_MAX];
unsigned char isBlockA = constantTimeEQ(i, indexA);
unsigned char isBlockB = constantTimeEQ(i, indexB);
unsigned char isBlockA = constantTimeEQ8(i, indexA);
unsigned char isBlockB = constantTimeEQ8(i, indexB);
for (j = 0; j < mdBlockSize; j++) {
unsigned char isPastC = isBlockA & constantTimeGE(j, c);
unsigned char isPastCPlus1 = isBlockA & constantTimeGE(j, c + 1);
@ -274,11 +289,6 @@ MAC(unsigned char *mdOut,
hashObj->end(mdState, mdOut, mdOutLen, mdOutMax);
hashObj->destroy(mdState, PR_TRUE);
PORT_Memset(lengthBytes, 0, sizeof lengthBytes);
PORT_Memset(hmacPad, 0, sizeof hmacPad);
PORT_Memset(firstBlock, 0, sizeof firstBlock);
PORT_Memset(macOut, 0, sizeof macOut);
return SECSuccess;
}