C++ (Cpp) px_md_update Examples

Example #1

File: px-hmac.c Project: adunstan/pg-cvs-mirror

static void
hmac_init(PX_HMAC *h, const uint8 *key, unsigned klen)
{
	unsigned	bs,
				hlen,
				i;
	uint8	   *keybuf;
	PX_MD	   *md = h->md;

	bs = px_md_block_size(md);
	hlen = px_md_result_size(md);
	keybuf = px_alloc(bs);
	memset(keybuf, 0, bs);

	if (klen > bs)
	{
		px_md_update(md, key, klen);
		px_md_finish(md, keybuf);
		px_md_reset(md);
	}
	else
		memcpy(keybuf, key, klen);

	for (i = 0; i < bs; i++)
	{
		h->p.ipad[i] = keybuf[i] ^ HMAC_IPAD;
		h->p.opad[i] = keybuf[i] ^ HMAC_OPAD;
	}

	memset(keybuf, 0, bs);
	px_free(keybuf);

	px_md_update(md, h->p.ipad, bs);
}

Example #2

File: pgp-mpi.c Project: CraigBryan/PostgresqlFun

int
pgp_mpi_hash(PX_MD * md, PGP_MPI * n)
{
	uint8		buf[2];

	buf[0] = n->bits >> 8;
	buf[1] = n->bits & 0xFF;
	px_md_update(md, buf, 2);
	px_md_update(md, n->data, n->bytes);

	return 0;
}

Example #3

File: pgcrypto.c Project: adunstan/pg-cvs-mirror

Datum
pg_digest(PG_FUNCTION_ARGS)
{
	bytea	   *arg;
	text	   *name;
	unsigned	len,
				hlen;
	PX_MD	   *md;
	bytea	   *res;

	name = PG_GETARG_TEXT_P(1);

	/* will give error if fails */
	md = find_provider(name, (PFN) px_find_digest, "Digest", 0);

	hlen = px_md_result_size(md);

	res = (text *) palloc(hlen + VARHDRSZ);
	SET_VARSIZE(res, hlen + VARHDRSZ);

	arg = PG_GETARG_BYTEA_P(0);
	len = VARSIZE(arg) - VARHDRSZ;

	px_md_update(md, (uint8 *) VARDATA(arg), len);
	px_md_finish(md, (uint8 *) VARDATA(res));
	px_md_free(md);

	PG_FREE_IF_COPY(arg, 0);
	PG_FREE_IF_COPY(name, 1);

	PG_RETURN_BYTEA_P(res);
}

Example #4

File: px-hmac.c Project: adunstan/pg-cvs-mirror

static void
hmac_reset(PX_HMAC *h)
{
	PX_MD	   *md = h->md;
	unsigned	bs = px_md_block_size(md);

	px_md_reset(md);
	px_md_update(md, h->p.ipad, bs);
}

Example #5

File: pgp-s2k.c Project: 0x0FFF/postgres

static int
calc_s2k_salted(PGP_S2K *s2k, PX_MD *md, const uint8 *key, unsigned key_len)
{
	unsigned	md_rlen;
	uint8		buf[PGP_MAX_DIGEST];
	unsigned	preload = 0;
	uint8	   *dst;
	unsigned	remain;

	md_rlen = px_md_result_size(md);

	dst = s2k->key;
	remain = s2k->key_len;
	while (remain > 0)
	{
		px_md_reset(md);

		if (preload > 0)
		{
			memset(buf, 0, preload);
			px_md_update(md, buf, preload);
		}
		preload++;

		px_md_update(md, s2k->salt, PGP_S2K_SALT);
		px_md_update(md, key, key_len);
		px_md_finish(md, buf);

		if (remain > md_rlen)
		{
			memcpy(dst, buf, md_rlen);
			remain -= md_rlen;
			dst += md_rlen;
		}
		else
		{
			memcpy(dst, buf, remain);
			remain = 0;
		}
	}
	px_memset(buf, 0, sizeof(buf));
	return 0;
}

Example #6

File: test-fortuna.c Project: andre-artus/fortuna-tests

static void
add_block_entropy(PX_MD *md, char *data)
{
	uint8 sha1[20];
	px_md_reset(md);
	px_md_update(md, (uint8 *) data, sizeof(data));
	px_md_finish(md, sha1);
	px_add_entropy(sha1, 20);
	memset(sha1, 0, 20);
}

Example #7

File: pgp-pgsql.c Project: adunstan/pg-cvs-mirror

/*
 * Mix a block of data into RNG.
 */
static void
add_block_entropy(PX_MD *md, text *data)
{
	uint8		sha1[20];

	px_md_reset(md);
	px_md_update(md, (uint8 *) VARDATA(data), VARSIZE(data) - VARHDRSZ);
	px_md_finish(md, sha1);

	px_add_entropy(sha1, 20);

	memset(sha1, 0, 20);
}

Example #8

File: px-hmac.c Project: adunstan/pg-cvs-mirror

static void
hmac_finish(PX_HMAC *h, uint8 *dst)
{
	PX_MD	   *md = h->md;
	unsigned	bs,
				hlen;
	uint8	   *buf;

	bs = px_md_block_size(md);
	hlen = px_md_result_size(md);

	buf = px_alloc(hlen);

	px_md_finish(md, buf);

	px_md_reset(md);
	px_md_update(md, h->p.opad, bs);
	px_md_update(md, buf, hlen);
	px_md_finish(md, dst);

	memset(buf, 0, hlen);
	px_free(buf);
}

Example #9

File: pgp-pubkey.c Project: Joe-xXx/postgres-old-soon-decommissioned

static int
calc_key_id(PGP_PubKey *pk)
{
	int			res;
	PX_MD	   *md;
	int			len;
	uint8		hdr[3];
	uint8		hash[20];

	res = pgp_load_digest(PGP_DIGEST_SHA1, &md);
	if (res < 0)
		return res;

	len = 1 + 4 + 1;
	switch (pk->algo)
	{
		case PGP_PUB_ELG_ENCRYPT:
			len += 2 + pk->pub.elg.p->bytes;
			len += 2 + pk->pub.elg.g->bytes;
			len += 2 + pk->pub.elg.y->bytes;
			break;
		case PGP_PUB_RSA_SIGN:
		case PGP_PUB_RSA_ENCRYPT:
		case PGP_PUB_RSA_ENCRYPT_SIGN:
			len += 2 + pk->pub.rsa.n->bytes;
			len += 2 + pk->pub.rsa.e->bytes;
			break;
		case PGP_PUB_DSA_SIGN:
			len += 2 + pk->pub.dsa.p->bytes;
			len += 2 + pk->pub.dsa.q->bytes;
			len += 2 + pk->pub.dsa.g->bytes;
			len += 2 + pk->pub.dsa.y->bytes;
			break;
	}

	hdr[0] = 0x99;
	hdr[1] = len >> 8;
	hdr[2] = len & 0xFF;
	px_md_update(md, hdr, 3);

	px_md_update(md, &pk->ver, 1);
	px_md_update(md, pk->time, 4);
	px_md_update(md, &pk->algo, 1);

	switch (pk->algo)
	{
		case PGP_PUB_ELG_ENCRYPT:
			pgp_mpi_hash(md, pk->pub.elg.p);
			pgp_mpi_hash(md, pk->pub.elg.g);
			pgp_mpi_hash(md, pk->pub.elg.y);
			break;
		case PGP_PUB_RSA_SIGN:
		case PGP_PUB_RSA_ENCRYPT:
		case PGP_PUB_RSA_ENCRYPT_SIGN:
			pgp_mpi_hash(md, pk->pub.rsa.n);
			pgp_mpi_hash(md, pk->pub.rsa.e);
			break;
		case PGP_PUB_DSA_SIGN:
			pgp_mpi_hash(md, pk->pub.dsa.p);
			pgp_mpi_hash(md, pk->pub.dsa.q);
			pgp_mpi_hash(md, pk->pub.dsa.g);
			pgp_mpi_hash(md, pk->pub.dsa.y);
			break;
	}

	px_md_finish(md, hash);
	px_md_free(md);

	memcpy(pk->key_id, hash + 12, 8);
	memset(hash, 0, 20);

	return 0;
}

Example #10

File: px-hmac.c Project: adunstan/pg-cvs-mirror

static void
hmac_update(PX_HMAC *h, const uint8 *data, unsigned dlen)
{
	px_md_update(h->md, data, dlen);
}

Example #11

File: pgp-s2k.c Project: 0x0FFF/postgres

static int
calc_s2k_iter_salted(PGP_S2K *s2k, PX_MD *md, const uint8 *key,
					 unsigned key_len)
{
	unsigned	md_rlen;
	uint8		buf[PGP_MAX_DIGEST];
	uint8	   *dst;
	unsigned	preload = 0;
	unsigned	remain,
				c,
				curcnt,
				count;

	count = s2k_decode_count(s2k->iter);

	md_rlen = px_md_result_size(md);

	remain = s2k->key_len;
	dst = s2k->key;
	while (remain > 0)
	{
		px_md_reset(md);

		if (preload)
		{
			memset(buf, 0, preload);
			px_md_update(md, buf, preload);
		}
		preload++;

		px_md_update(md, s2k->salt, PGP_S2K_SALT);
		px_md_update(md, key, key_len);
		curcnt = PGP_S2K_SALT + key_len;

		while (curcnt < count)
		{
			if (curcnt + PGP_S2K_SALT < count)
				c = PGP_S2K_SALT;
			else
				c = count - curcnt;
			px_md_update(md, s2k->salt, c);
			curcnt += c;

			if (curcnt + key_len < count)
				c = key_len;
			else if (curcnt < count)
				c = count - curcnt;
			else
				break;
			px_md_update(md, key, c);
			curcnt += c;
		}
		px_md_finish(md, buf);

		if (remain > md_rlen)
		{
			memcpy(dst, buf, md_rlen);
			remain -= md_rlen;
			dst += md_rlen;
		}
		else
		{
			memcpy(dst, buf, remain);
			remain = 0;
		}
	}
	px_memset(buf, 0, sizeof(buf));
	return 0;
}