Differential D8236 Diff 25389 head/sys/geom/eli/pkcs5v2.c

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head/sys/geom/eli/pkcs5v2.c

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	void			void
	pkcs5v2_genkey(uint8_t key, unsigned keylen, const uint8_t salt,			pkcs5v2_genkey(uint8_t key, unsigned keylen, const uint8_t salt,
	size_t saltsize, const char *passphrase, u_int iterations)			size_t saltsize, const char *passphrase, u_int iterations)
	{			{
	uint8_t md[SHA512_MDLEN], saltcount[saltsize + sizeof(uint32_t)];			uint8_t md[SHA512_MDLEN], saltcount[saltsize + sizeof(uint32_t)];
	uint8_t counter, keyp;			uint8_t counter, keyp;
	u_int i, bsize, passlen;			u_int i, bsize, passlen;
	uint32_t count;			uint32_t count;
				struct hmac_ctx startpoint, ctx;

	passlen = strlen(passphrase);			passlen = strlen(passphrase);
	bzero(key, keylen);			bzero(key, keylen);
	bcopy(salt, saltcount, saltsize);			bcopy(salt, saltcount, saltsize);
	counter = saltcount + saltsize;			counter = saltcount + saltsize;

	keyp = key;			keyp = key;
	for (count = 1; keylen > 0; count++, keylen -= bsize, keyp += bsize) {			for (count = 1; keylen > 0; count++, keylen -= bsize, keyp += bsize) {
	bsize = MIN(keylen, sizeof(md));			bsize = MIN(keylen, sizeof(md));

	counter[0] = (count >> 24) & 0xff;			be32enc(counter, count);
	counter[1] = (count >> 16) & 0xff;
	counter[2] = (count >> 8) & 0xff;			g_eli_crypto_hmac_init(&startpoint, passphrase, passlen);
	counter[3] = count & 0xff;			ctx = startpoint;
	g_eli_crypto_hmac(passphrase, passlen, saltcount,			g_eli_crypto_hmac_update(&ctx, saltcount, sizeof(saltcount));
	sizeof(saltcount), md, 0);			g_eli_crypto_hmac_final(&ctx, md, sizeof(md));
	xor(keyp, md, bsize);			xor(keyp, md, bsize);

	for(i = 1; i < iterations; i++) {			for(i = 1; i < iterations; i++) {
	g_eli_crypto_hmac(passphrase, passlen, md, sizeof(md),			ctx = startpoint;
	md, 0);			g_eli_crypto_hmac_update(&ctx, md, sizeof(md));
				g_eli_crypto_hmac_final(&ctx, md, sizeof(md));
	xor(keyp, md, bsize);			xor(keyp, md, bsize);
	}			}
	}			}
				explicit_bzero(&startpoint, sizeof(startpoint));
				explicit_bzero(&ctx, sizeof(ctx));
	}			}

	#ifndef _KERNEL			#ifndef _KERNEL
	#ifndef _STAND			#ifndef _STAND
	/*			/*
	* Return the number of microseconds needed for 'interations' iterations.			* Return the number of microseconds needed for 'interations' iterations.
	*/			*/
	static int			static int
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