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-rw-r--r--src/pluto/pgp.c647
1 files changed, 0 insertions, 647 deletions
diff --git a/src/pluto/pgp.c b/src/pluto/pgp.c
deleted file mode 100644
index b956ce4d7..000000000
--- a/src/pluto/pgp.c
+++ /dev/null
@@ -1,647 +0,0 @@
-/* Support of OpenPGP certificates
- * Copyright (C) 2002-2004 Andreas Steffen, Zuercher Hochschule Winterthur
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * RCSID $Id: pgp.c 3252 2007-10-06 21:24:50Z andreas $
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <freeswan.h>
-#include <ipsec_policy.h>
-
-#include "constants.h"
-#include "defs.h"
-#include "mp_defs.h"
-#include "log.h"
-#include "id.h"
-#include "pgp.h"
-#include "certs.h"
-#include "md5.h"
-#include "whack.h"
-#include "pkcs1.h"
-#include "keys.h"
-
-/*
- * chained list of OpenPGP end certificates
- */
-static pgpcert_t *pgpcerts = NULL;
-
-/*
- * OpenPGP packet tags defined in section 4.3 of RFC 2440
- */
-#define PGP_PKT_RESERVED 0
-#define PGP_PKT_PUBKEY_ENC_SESSION_KEY 1
-#define PGP_PKT_SIGNATURE 2
-#define PGP_PKT_SYMKEY_ENC_SESSION_KEY 3
-#define PGP_PKT_ONE_PASS_SIGNATURE_PKT 4
-#define PGP_PKT_SECRET_KEY 5
-#define PGP_PKT_PUBLIC_KEY 6
-#define PGP_PKT_SECRET_SUBKEY 7
-#define PGP_PKT_COMPRESSED_DATA 8
-#define PGP_PKT_SYMKEY_ENC_DATA 9
-#define PGP_PKT_MARKER 10
-#define PGP_PKT_LITERAL_DATA 11
-#define PGP_PKT_TRUST 12
-#define PGP_PKT_USER_ID 13
-#define PGP_PKT_PUBLIC_SUBKEY 14
-#define PGP_PKT_ROOF 15
-
-static const char *const pgp_packet_type_name[] = {
- "Reserved",
- "Public-Key Encrypted Session Key Packet",
- "Signature Packet",
- "Symmetric-Key Encrypted Session Key Packet",
- "One-Pass Signature Packet",
- "Secret Key Packet",
- "Public Key Packet",
- "Secret Subkey Packet",
- "Compressed Data Packet",
- "Symmetrically Encrypted Data Packet",
- "Marker Packet",
- "Literal Data Packet",
- "Trust Packet",
- "User ID Packet",
- "Public Subkey Packet"
-};
-
-/*
- * OpenPGP public key algorithms defined in section 9.1 of RFC 2440
- */
-#define PGP_PUBKEY_ALG_RSA 1
-#define PGP_PUBKEY_ALG_RSA_ENC_ONLY 2
-#define PGP_PUBKEY_ALG_RSA_SIGN_ONLY 3
-#define PGP_PUBKEY_ALG_ELGAMAL_ENC_ONLY 16
-#define PGP_PUBKEY_ALG_DSA 17
-#define PGP_PUBKEY_ALG_ECC 18
-#define PGP_PUBKEY_ALG_ECDSA 19
-#define PGP_PUBKEY_ALG_ELGAMAL 20
-
-/*
- * OpenPGP symmetric key algorithms defined in section 9.2 of RFC 2440
- */
-#define PGP_SYM_ALG_PLAIN 0
-#define PGP_SYM_ALG_IDEA 1
-#define PGP_SYM_ALG_3DES 2
-#define PGP_SYM_ALG_CAST5 3
-#define PGP_SYM_ALG_BLOWFISH 4
-#define PGP_SYM_ALG_SAFER 5
-#define PGP_SYM_ALG_DES 6
-#define PGP_SYM_ALG_AES 7
-#define PGP_SYM_ALG_AES_192 8
-#define PGP_SYM_ALG_AES_256 9
-#define PGP_SYM_ALG_TWOFISH 10
-#define PGP_SYM_ALG_ROOF 11
-
-static const char *const pgp_sym_alg_name[] = {
- "Plaintext",
- "IDEA",
- "3DES",
- "CAST5",
- "Blowfish",
- "SAFER",
- "DES",
- "AES",
- "AES-192",
- "AES-256",
- "Twofish"
-};
-
-/*
- * Size of PGP Key ID
- */
-#define PGP_KEYID_SIZE 8
-
-const pgpcert_t empty_pgpcert = {
- NULL , /* *next */
- 0 , /* installed */
- 0 , /* count */
- { NULL, 0 }, /* certificate */
- 0 , /* created */
- 0 , /* until */
- 0 , /* pubkeyAlgorithm */
- { NULL, 0 }, /* modulus */
- { NULL, 0 }, /* publicExponent */
- "" /* fingerprint */
-};
-
-static size_t
-pgp_size(chunk_t *blob, int len)
-{
- size_t size = 0;
-
- blob->len -= len;
- while (len-- > 0)
- size = 256*size + *blob->ptr++;
- return size;
-}
-
-/*
- * extracts the length of a PGP packet
- */
-static size_t
-pgp_old_packet_length(chunk_t *blob)
-{
- /* bits 0 and 1 define the packet length type */
- int len_type = 0x03 & *blob->ptr++;
-
- blob->len--;
-
- /* len_type: 0 -> 1 byte, 1 -> 2 bytes, 2 -> 4 bytes */
- return pgp_size(blob, (len_type == 0)? 1: len_type << 1);
-}
-
-/*
- * extracts PGP packet version (V3 or V4)
- */
-static u_char
-pgp_version(chunk_t *blob)
-{
- u_char version = *blob->ptr++;
- blob->len--;
- DBG(DBG_PARSING,
- DBG_log("L3 - version:");
- DBG_log(" V%d", version)
- )
- return version;
-}
-
-/*
- * Parse OpenPGP public key packet defined in section 5.5.2 of RFC 2440
- */
-static bool
-parse_pgp_pubkey_packet(chunk_t *packet, pgpcert_t *cert)
-{
- u_char version = pgp_version(packet);
-
- if (version < 3 || version > 4)
- {
- plog("PGP packet version V%d not supported", version);
- return FALSE;
- }
-
- /* creation date - 4 bytes */
- cert->created = (time_t)pgp_size(packet, 4);
- DBG(DBG_PARSING,
- DBG_log("L3 - created:");
- DBG_log(" %s", timetoa(&cert->created, TRUE))
- )
-
- if (version == 3)
- {
- /* validity in days - 2 bytes */
- cert->until = (time_t)pgp_size(packet, 2);
-
- /* validity of 0 days means that the key never expires */
- if (cert->until > 0)
- cert->until = cert->created + 24*3600*cert->until;
-
- DBG(DBG_PARSING,
- DBG_log("L3 - until:");
- DBG_log(" %s", timetoa(&cert->until, TRUE));
- )
- }
-
- /* public key algorithm - 1 byte */
- DBG(DBG_PARSING,
- DBG_log("L3 - public key algorithm:")
- )
-
- switch (pgp_size(packet, 1))
- {
- case PGP_PUBKEY_ALG_RSA:
- case PGP_PUBKEY_ALG_RSA_SIGN_ONLY:
- cert->pubkeyAlg = PUBKEY_ALG_RSA;
- DBG(DBG_PARSING,
- DBG_log(" RSA")
- )
- /* modulus n */
- cert->modulus.len = (pgp_size(packet, 2)+7) / BITS_PER_BYTE;
- cert->modulus.ptr = packet->ptr;
- packet->ptr += cert->modulus.len;
- packet->len -= cert->modulus.len;
- DBG(DBG_PARSING,
- DBG_log("L3 - modulus:")
- )
- DBG_cond_dump_chunk(DBG_RAW, "", cert->modulus);
-
- /* public exponent e */
- cert->publicExponent.len = (pgp_size(packet, 2)+7) / BITS_PER_BYTE;
- cert->publicExponent.ptr = packet->ptr;
- packet->ptr += cert->publicExponent.len;
- packet->len -= cert->publicExponent.len;
- DBG(DBG_PARSING,
- DBG_log("L3 - public exponent:")
- )
- DBG_cond_dump_chunk(DBG_RAW, "", cert->publicExponent);
-
- if (version == 3)
- {
- /* a V3 fingerprint is the MD5 hash of modulus and public exponent */
- MD5_CTX context;
- MD5Init(&context);
- MD5Update(&context, cert->modulus.ptr, cert->modulus.len);
- MD5Update(&context, cert->publicExponent.ptr, cert->publicExponent.len);
- MD5Final(cert->fingerprint, &context);
- }
- else
- {
- plog(" computation of V4 key ID not implemented yet");
- }
- break;
- case PGP_PUBKEY_ALG_DSA:
- cert->pubkeyAlg = PUBKEY_ALG_DSA;
- DBG(DBG_PARSING,
- DBG_log(" DSA")
- )
- plog(" DSA public keys not supported");
- return FALSE;
- default:
- cert->pubkeyAlg = 0;
- DBG(DBG_PARSING,
- DBG_log(" other")
- )
- plog(" exotic not RSA public keys not supported");
- return FALSE;
- }
- return TRUE;
-}
-
-/*
- * Parse OpenPGP secret key packet defined in section 5.5.3 of RFC 2440
- */
-static bool
-parse_pgp_secretkey_packet(chunk_t *packet, RSA_private_key_t *key)
-{
- int i, s2k;
- pgpcert_t cert = empty_pgpcert;
-
- if (!parse_pgp_pubkey_packet(packet, &cert))
- return FALSE;
-
- init_RSA_public_key((RSA_public_key_t *)key, cert.publicExponent
- , cert.modulus);
-
- /* string-to-key usage */
- s2k = pgp_size(packet, 1);
-
- DBG(DBG_PARSING,
- DBG_log("L3 - string-to-key: %d", s2k)
- )
-
- if (s2k == 255)
- {
- plog(" string-to-key specifiers not supported");
- return FALSE;
- }
-
- if (s2k >= PGP_SYM_ALG_ROOF)
- {
- plog(" undefined symmetric key algorithm");
- return FALSE;
- }
-
- /* a known symmetric key algorithm is specified*/
- DBG(DBG_PARSING,
- DBG_log(" %s", pgp_sym_alg_name[s2k])
- )
-
- /* private key is unencrypted */
- if (s2k == PGP_SYM_ALG_PLAIN)
- {
- for (i = 2; i < RSA_PRIVATE_FIELD_ELEMENTS; i++)
- {
- mpz_t u; /* auxiliary variable */
-
- /* compute offset to private key component i*/
- MP_INT *n = (MP_INT*)((char *)key + RSA_private_field[i].offset);
-
- switch (i)
- {
- case 2:
- case 3:
- case 4:
- {
- size_t len = (pgp_size(packet, 2)+7) / BITS_PER_BYTE;
-
- n_to_mpz(n, packet->ptr, len);
- DBG(DBG_PARSING,
- DBG_log("L3 - %s:", RSA_private_field[i].name)
- )
- DBG_cond_dump(DBG_PRIVATE, "", packet->ptr, len);
- packet->ptr += len;
- packet->len -= len;
- }
- break;
- case 5: /* dP = d mod (p-1) */
- mpz_init(u);
- mpz_sub_ui(u, &key->p, 1);
- mpz_mod(n, &key->d, u);
- mpz_clear(u);
- break;
- case 6: /* dQ = d mod (q-1) */
- mpz_init(u);
- mpz_sub_ui(u, &key->q, 1);
- mpz_mod(n, &key->d, u);
- mpz_clear(u);
- break;
- case 7: /* qInv = (q^-1) mod p */
- mpz_invert(n, &key->q, &key->p);
- if (mpz_cmp_ui(n, 0) < 0)
- mpz_add(n, n, &key->p);
- passert(mpz_cmp(n, &key->p) < 0);
- break;
- }
- }
- return TRUE;
- }
-
- plog(" %s encryption not supported", pgp_sym_alg_name[s2k]);
- return FALSE;
-}
-
-/*
- * Parse OpenPGP signature packet defined in section 5.2.2 of RFC 2440
- */
-static bool
-parse_pgp_signature_packet(chunk_t *packet, pgpcert_t *cert)
-{
- time_t created;
- chunk_t keyid;
- u_char sig_type;
- u_char version = pgp_version(packet);
-
- /* we parse only V3 signature packets */
- if (version != 3)
- return TRUE;
-
- /* size byte must have the value 5 */
- if (pgp_size(packet, 1) != 5)
- {
- plog(" size must be 5");
- return FALSE;
- }
-
- /* signature type - 1 byte */
- sig_type = (u_char)pgp_size(packet, 1);
- DBG(DBG_PARSING,
- DBG_log("L3 - signature type: 0x%2x", sig_type)
- )
-
- /* creation date - 4 bytes */
- created = (time_t)pgp_size(packet, 4);
- DBG(DBG_PARSING,
- DBG_log("L3 - created:");
- DBG_log(" %s", timetoa(&cert->created, TRUE))
- )
-
- /* key ID of signer - 8 bytes */
- keyid.ptr = packet->ptr;
- keyid.len = PGP_KEYID_SIZE;
- DBG_cond_dump_chunk(DBG_PARSING, "L3 - key ID of signer", keyid);
-
- return TRUE;
-}
-
-bool
-parse_pgp(chunk_t blob, pgpcert_t *cert, RSA_private_key_t *key)
-{
- DBG(DBG_PARSING,
- DBG_log("L0 - PGP file:")
- )
- DBG_cond_dump_chunk(DBG_RAW, "", blob);
-
- if (cert != NULL)
- {
- /* parse a PGP certificate file */
- cert->certificate = blob;
- time(&cert->installed);
- }
- else if (key == NULL)
- {
- /* should not occur, nothing to parse */
- return FALSE;
- }
-
- while (blob.len > 0)
- {
- chunk_t packet = empty_chunk;
- u_char packet_tag = *blob.ptr;
-
- DBG(DBG_PARSING,
- DBG_log("L1 - PGP packet: tag= 0x%2x", packet_tag)
- )
-
- /* bit 7 must be set */
- if (!(packet_tag & 0x80))
- {
- plog(" incorrect Packet Tag");
- return FALSE;
- }
-
- /* bit 6 set defines new packet format */
- if (packet_tag & 0x40)
- {
- plog(" new PGP packet format not supported");
- return FALSE;
- }
- else
- {
- int packet_type = (packet_tag & 0x3C) >> 2;
-
- packet.len = pgp_old_packet_length(&blob);
- packet.ptr = blob.ptr;
- blob.ptr += packet.len;
- blob.len -= packet.len;
- DBG(DBG_PARSING,
- DBG_log(" %s (%d), old format, %d bytes",
- (packet_type < PGP_PKT_ROOF) ?
- pgp_packet_type_name[packet_type] :
- "Undefined Packet Type", packet_type, (int)packet.len);
- DBG_log("L2 - body:")
- )
- DBG_cond_dump_chunk(DBG_RAW, "", packet);
-
- if (cert != NULL)
- {
- /* parse a PGP certificate */
- switch (packet_type)
- {
- case PGP_PKT_PUBLIC_KEY:
- if (!parse_pgp_pubkey_packet(&packet, cert))
- return FALSE;
- break;
- case PGP_PKT_SIGNATURE:
- if (!parse_pgp_signature_packet(&packet, cert))
- return FALSE;
- break;
- case PGP_PKT_USER_ID:
- DBG(DBG_PARSING,
- DBG_log("L3 - user ID:");
- DBG_log(" '%.*s'", (int)packet.len, packet.ptr)
- )
- break;
- default:
- break;
- }
- }
- else
- {
- /* parse a PGP private key file */
- switch (packet_type)
- {
- case PGP_PKT_SECRET_KEY:
- if (!parse_pgp_secretkey_packet(&packet, key))
- return FALSE;
- break;
- default:
- break;
- }
- }
- }
- }
- return TRUE;
-}
-
-/*
- * compare two OpenPGP certificates
- */
-static bool
-same_pgpcert(pgpcert_t *a, pgpcert_t *b)
-{
- return a->certificate.len == b->certificate.len &&
- memcmp(a->certificate.ptr, b->certificate.ptr, b->certificate.len) == 0;
-}
-
-/*
- * for each link pointing to the certificate increase the count by one
- */
-void
-share_pgpcert(pgpcert_t *cert)
-{
- if (cert != NULL)
- cert->count++;
-}
-
-/*
- * select the OpenPGP keyid as ID
- */
-void
-select_pgpcert_id(pgpcert_t *cert, struct id *end_id)
-{
- end_id->kind = ID_KEY_ID;
- end_id->name.len = PGP_FINGERPRINT_SIZE;
- end_id->name.ptr = cert->fingerprint;
- end_id->name.ptr = temporary_cyclic_buffer();
- memcpy(end_id->name.ptr, cert->fingerprint, PGP_FINGERPRINT_SIZE);
-}
-
-/*
- * add an OpenPGP user/host certificate to the chained list
- */
-pgpcert_t*
-add_pgpcert(pgpcert_t *cert)
-{
- pgpcert_t *c = pgpcerts;
-
- while (c != NULL)
- {
- if (same_pgpcert(c, cert)) /* already in chain, free cert */
- {
- free_pgpcert(cert);
- return c;
- }
- c = c->next;
- }
-
- /* insert new cert at the root of the chain */
- cert->next = pgpcerts;
- pgpcerts = cert;
- DBG(DBG_CONTROL | DBG_PARSING,
- DBG_log(" pgp cert inserted")
- )
- return cert;
-}
-
-/* release of a certificate decreases the count by one
- " the certificate is freed when the counter reaches zero
- */
-void
-release_pgpcert(pgpcert_t *cert)
-{
- if (cert != NULL && --cert->count == 0)
- {
- pgpcert_t **pp = &pgpcerts;
- while (*pp != cert)
- pp = &(*pp)->next;
- *pp = cert->next;
- free_pgpcert(cert);
- }
-}
-
-/*
- * free a PGP certificate
- */
-void
-free_pgpcert(pgpcert_t *cert)
-{
- if (cert != NULL)
- {
- if (cert->certificate.ptr != NULL)
- pfree(cert->certificate.ptr);
- pfree(cert);
- }
-}
-
-/*
- * list all PGP end certificates in a chained list
- */
-void
-list_pgp_end_certs(bool utc)
-{
- pgpcert_t *cert = pgpcerts;
- time_t now;
-
- /* determine the current time */
- time(&now);
-
- if (cert != NULL)
- {
- whack_log(RC_COMMENT, " ");
- whack_log(RC_COMMENT, "List of PGP End certificates:");
- whack_log(RC_COMMENT, " ");
- }
-
- while (cert != NULL)
- {
- unsigned keysize;
- char buf[BUF_LEN];
- cert_t c;
-
- c.type = CERT_PGP;
- c.u.pgp = cert;
-
- whack_log(RC_COMMENT, "%s, count: %d", timetoa(&cert->installed, utc), cert->count);
- datatot(cert->fingerprint, PGP_FINGERPRINT_SIZE, 'x', buf, BUF_LEN);
- whack_log(RC_COMMENT, " fingerprint: %s", buf);
- form_keyid(cert->publicExponent, cert->modulus, buf, &keysize);
- whack_log(RC_COMMENT, " pubkey: %4d RSA Key %s%s", 8*keysize, buf,
- (has_private_key(c))? ", has private key" : "");
- whack_log(RC_COMMENT, " created: %s", timetoa(&cert->created, utc));
- whack_log(RC_COMMENT, " until: %s %s", timetoa(&cert->until, utc),
- check_expiry(cert->until, CA_CERT_WARNING_INTERVAL, TRUE));
- cert = cert->next;
- }
-}
-
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