Add missing pgcrypto files from previous commit.

contrib/pgcrypto/pgp-mpi.c

@@ -0,0 +1,134 @@
+/*
+ * pgp-mpi.c
+ *	  OpenPGP MPI helper functions.
+ *
+ * Copyright (c) 2005 Marko Kreen
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *	  notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *	  notice, this list of conditions and the following disclaimer in the
+ *	  documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.	IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $PostgreSQL: pgsql/contrib/pgcrypto/pgp-mpi.c,v 1.1 2005/07/10 13:46:29 momjian Exp $
+ */
+#include <postgres.h>
+
+#include "px.h"
+#include "mbuf.h"
+#include "pgp.h"
+
+int pgp_mpi_alloc(int bits, PGP_MPI **mpi)
+{
+	PGP_MPI *n;
+	int len = (bits + 7) / 8;
+	if (bits < 0 || bits > 0xFFFF)
+	{
+		px_debug("pgp_mpi_alloc: unreasonable request: bits=%d", bits);
+		return PXE_PGP_CORRUPT_DATA;
+	}
+	n = px_alloc(sizeof(*n) + len);
+	n->bits = bits;
+	n->bytes = len;
+	n->data = (uint8*)(n) + sizeof(*n);
+	*mpi = n;
+	return 0;
+}
+
+int pgp_mpi_create(uint8 *data, int bits, PGP_MPI **mpi)
+{
+	int res;
+	PGP_MPI *n;
+
+	res = pgp_mpi_alloc(bits, &n);
+	if (res < 0)
+		return res;
+	memcpy(n->data, data, n->bytes);
+	*mpi = n;
+	return 0;
+}
+
+int pgp_mpi_free(PGP_MPI *mpi)
+{
+	memset(mpi, 0, sizeof(*mpi) + mpi->bytes);
+	px_free(mpi);
+	return 0;
+}
+
+int pgp_mpi_read(PullFilter *src, PGP_MPI **mpi)
+{
+	int res;
+	uint8 hdr[2];
+	int bits;
+	PGP_MPI *n;
+
+	res = pullf_read_fixed(src, 2, hdr);
+	if (res < 0)
+		return res;
+	bits = ((unsigned)hdr[0] << 8) + hdr[1];
+
+	res = pgp_mpi_alloc(bits, &n);
+	if (res < 0)
+		return res;
+
+	res = pullf_read_fixed(src, n->bytes, n->data);
+	if (res < 0)
+		pgp_mpi_free(n);
+	else
+		*mpi = n;
+	return res;
+}
+
+int pgp_mpi_write(PushFilter *dst, PGP_MPI *n)
+{
+	int res;
+	uint8 buf[2];
+
+	buf[0] = n->bits >> 8;
+	buf[1] = n->bits & 0xFF;
+	res = pushf_write(dst, buf, 2);
+	if (res >= 0)
+		res = pushf_write(dst, n->data, n->bytes);
+	return res;
+}
+
+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;
+}
+
+unsigned pgp_mpi_cksum(unsigned cksum, PGP_MPI *n)
+{
+	int i;
+
+	cksum += n->bits >> 8;
+	cksum += n->bits & 0xFF;
+	for (i = 0; i < n->bytes; i++)
+		cksum += n->data[i];
+
+	return cksum;
+}
+