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diff --git a/src/libcharon/config/proposal.c b/src/libcharon/config/proposal.c
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+++ b/src/libcharon/config/proposal.c
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+/*
+ * Copyright (C) 2008-2009 Tobias Brunner
+ * Copyright (C) 2006 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * 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.
+ */
+
+#include <string.h>
+
+#include "proposal.h"
+
+#include <daemon.h>
+#include <utils/linked_list.h>
+#include <utils/identification.h>
+#include <utils/lexparser.h>
+#include <crypto/transform.h>
+#include <crypto/prfs/prf.h>
+#include <crypto/crypters/crypter.h>
+#include <crypto/signers/signer.h>
+#include <crypto/proposal/proposal_keywords.h>
+
+ENUM(protocol_id_names, PROTO_NONE, PROTO_ESP,
+ "PROTO_NONE",
+ "IKE",
+ "AH",
+ "ESP",
+);
+
+ENUM(extended_sequence_numbers_names, NO_EXT_SEQ_NUMBERS, EXT_SEQ_NUMBERS,
+ "NO_EXT_SEQ",
+ "EXT_SEQ",
+);
+
+typedef struct private_proposal_t private_proposal_t;
+typedef struct algorithm_t algorithm_t;
+
+/**
+ * Private data of an proposal_t object
+ */
+struct private_proposal_t {
+
+ /**
+ * Public part
+ */
+ proposal_t public;
+
+ /**
+ * protocol (ESP or AH)
+ */
+ protocol_id_t protocol;
+
+ /**
+ * priority ordered list of encryption algorithms
+ */
+ linked_list_t *encryption_algos;
+
+ /**
+ * priority ordered list of integrity algorithms
+ */
+ linked_list_t *integrity_algos;
+
+ /**
+ * priority ordered list of pseudo random functions
+ */
+ linked_list_t *prf_algos;
+
+ /**
+ * priority ordered list of dh groups
+ */
+ linked_list_t *dh_groups;
+
+ /**
+ * priority ordered list of extended sequence number flags
+ */
+ linked_list_t *esns;
+
+ /**
+ * senders SPI
+ */
+ u_int64_t spi;
+};
+
+/**
+ * Struct used to store different kinds of algorithms.
+ */
+struct algorithm_t {
+ /**
+ * Value from an encryption_algorithm_t/integrity_algorithm_t/...
+ */
+ u_int16_t algorithm;
+
+ /**
+ * the associated key size in bits, or zero if not needed
+ */
+ u_int16_t key_size;
+};
+
+/**
+ * Add algorithm/keysize to a algorithm list
+ */
+static void add_algo(linked_list_t *list, u_int16_t algo, u_int16_t key_size)
+{
+ algorithm_t *algo_key;
+
+ algo_key = malloc_thing(algorithm_t);
+ algo_key->algorithm = algo;
+ algo_key->key_size = key_size;
+ list->insert_last(list, (void*)algo_key);
+}
+
+/**
+ * Implements proposal_t.add_algorithm
+ */
+static void add_algorithm(private_proposal_t *this, transform_type_t type,
+ u_int16_t algo, u_int16_t key_size)
+{
+ switch (type)
+ {
+ case ENCRYPTION_ALGORITHM:
+ add_algo(this->encryption_algos, algo, key_size);
+ break;
+ case INTEGRITY_ALGORITHM:
+ add_algo(this->integrity_algos, algo, key_size);
+ break;
+ case PSEUDO_RANDOM_FUNCTION:
+ add_algo(this->prf_algos, algo, key_size);
+ break;
+ case DIFFIE_HELLMAN_GROUP:
+ add_algo(this->dh_groups, algo, 0);
+ break;
+ case EXTENDED_SEQUENCE_NUMBERS:
+ add_algo(this->esns, algo, 0);
+ break;
+ default:
+ break;
+ }
+}
+
+/**
+ * filter function for peer configs
+ */
+static bool alg_filter(void *null, algorithm_t **in, u_int16_t *alg,
+ void **unused, u_int16_t *key_size)
+{
+ algorithm_t *algo = *in;
+ *alg = algo->algorithm;
+ if (key_size)
+ {
+ *key_size = algo->key_size;
+ }
+ return TRUE;
+}
+
+/**
+ * Implements proposal_t.create_enumerator.
+ */
+static enumerator_t *create_enumerator(private_proposal_t *this,
+ transform_type_t type)
+{
+ linked_list_t *list;
+
+ switch (type)
+ {
+ case ENCRYPTION_ALGORITHM:
+ list = this->encryption_algos;
+ break;
+ case INTEGRITY_ALGORITHM:
+ list = this->integrity_algos;
+ break;
+ case PSEUDO_RANDOM_FUNCTION:
+ list = this->prf_algos;
+ break;
+ case DIFFIE_HELLMAN_GROUP:
+ list = this->dh_groups;
+ break;
+ case EXTENDED_SEQUENCE_NUMBERS:
+ list = this->esns;
+ break;
+ default:
+ return NULL;
+ }
+ return enumerator_create_filter(list->create_enumerator(list),
+ (void*)alg_filter, NULL, NULL);
+}
+
+/**
+ * Implements proposal_t.get_algorithm.
+ */
+static bool get_algorithm(private_proposal_t *this, transform_type_t type,
+ u_int16_t *alg, u_int16_t *key_size)
+{
+ enumerator_t *enumerator;
+ bool found = FALSE;
+
+ enumerator = create_enumerator(this, type);
+ if (enumerator->enumerate(enumerator, alg, key_size))
+ {
+ found = TRUE;
+ }
+ enumerator->destroy(enumerator);
+ return found;
+}
+
+/**
+ * Implements proposal_t.has_dh_group
+ */
+static bool has_dh_group(private_proposal_t *this, diffie_hellman_group_t group)
+{
+ bool result = FALSE;
+
+ if (this->dh_groups->get_count(this->dh_groups))
+ {
+ algorithm_t *current;
+ enumerator_t *enumerator;
+
+ enumerator = this->dh_groups->create_enumerator(this->dh_groups);
+ while (enumerator->enumerate(enumerator, (void**)&current))
+ {
+ if (current->algorithm == group)
+ {
+ result = TRUE;
+ break;
+ }
+ }
+ enumerator->destroy(enumerator);
+ }
+ else if (group == MODP_NONE)
+ {
+ result = TRUE;
+ }
+ return result;
+}
+
+/**
+ * Implementation of proposal_t.strip_dh.
+ */
+static void strip_dh(private_proposal_t *this)
+{
+ algorithm_t *alg;
+
+ while (this->dh_groups->remove_last(this->dh_groups, (void**)&alg) == SUCCESS)
+ {
+ free(alg);
+ }
+}
+
+/**
+ * Returns true if the given alg is an authenticated encryption algorithm
+ */
+static bool is_authenticated_encryption(u_int16_t alg)
+{
+ switch(alg)
+ {
+ case ENCR_AES_CCM_ICV8:
+ case ENCR_AES_CCM_ICV12:
+ case ENCR_AES_CCM_ICV16:
+ case ENCR_AES_GCM_ICV8:
+ case ENCR_AES_GCM_ICV12:
+ case ENCR_AES_GCM_ICV16:
+ case ENCR_CAMELLIA_CCM_ICV8:
+ case ENCR_CAMELLIA_CCM_ICV12:
+ case ENCR_CAMELLIA_CCM_ICV16:
+ case ENCR_NULL_AUTH_AES_GMAC:
+ return TRUE;
+ }
+ return FALSE;
+}
+
+/**
+ * Find a matching alg/keysize in two linked lists
+ */
+static bool select_algo(linked_list_t *first, linked_list_t *second, bool priv,
+ bool *add, u_int16_t *alg, size_t *key_size)
+{
+ enumerator_t *e1, *e2;
+ algorithm_t *alg1, *alg2;
+
+ /* if in both are zero algorithms specified, we HAVE a match */
+ if (first->get_count(first) == 0 && second->get_count(second) == 0)
+ {
+ *add = FALSE;
+ return TRUE;
+ }
+
+ e1 = first->create_enumerator(first);
+ e2 = second->create_enumerator(second);
+ /* compare algs, order of algs in "first" is preferred */
+ while (e1->enumerate(e1, &alg1))
+ {
+ e2->destroy(e2);
+ e2 = second->create_enumerator(second);
+ while (e2->enumerate(e2, &alg2))
+ {
+ if (alg1->algorithm == alg2->algorithm &&
+ alg1->key_size == alg2->key_size)
+ {
+ if (!priv && alg1->algorithm >= 1024)
+ {
+ /* accept private use algorithms only if requested */
+ DBG1(DBG_CFG, "an algorithm from private space would match, "
+ "but peer implementation is unknown, skipped");
+ continue;
+ }
+ /* ok, we have an algorithm */
+ *alg = alg1->algorithm;
+ *key_size = alg1->key_size;
+ *add = TRUE;
+ e1->destroy(e1);
+ e2->destroy(e2);
+ return TRUE;
+ }
+ }
+ }
+ /* no match in all comparisons */
+ e1->destroy(e1);
+ e2->destroy(e2);
+ return FALSE;
+}
+
+/**
+ * Implements proposal_t.select.
+ */
+static proposal_t *select_proposal(private_proposal_t *this,
+ private_proposal_t *other, bool private)
+{
+ proposal_t *selected;
+ u_int16_t algo;
+ size_t key_size;
+ bool add;
+
+ DBG2(DBG_CFG, "selecting proposal:");
+
+ /* check protocol */
+ if (this->protocol != other->protocol)
+ {
+ DBG2(DBG_CFG, " protocol mismatch, skipping");
+ return NULL;
+ }
+
+ selected = proposal_create(this->protocol);
+
+ /* select encryption algorithm */
+ if (select_algo(this->encryption_algos, other->encryption_algos, private,
+ &add, &algo, &key_size))
+ {
+ if (add)
+ {
+ selected->add_algorithm(selected, ENCRYPTION_ALGORITHM,
+ algo, key_size);
+ }
+ }
+ else
+ {
+ selected->destroy(selected);
+ DBG2(DBG_CFG, " no acceptable %N found",
+ transform_type_names, ENCRYPTION_ALGORITHM);
+ return NULL;
+ }
+ /* select integrity algorithm */
+ if (!is_authenticated_encryption(algo))
+ {
+ if (select_algo(this->integrity_algos, other->integrity_algos, private,
+ &add, &algo, &key_size))
+ {
+ if (add)
+ {
+ selected->add_algorithm(selected, INTEGRITY_ALGORITHM,
+ algo, key_size);
+ }
+ }
+ else
+ {
+ selected->destroy(selected);
+ DBG2(DBG_CFG, " no acceptable %N found",
+ transform_type_names, INTEGRITY_ALGORITHM);
+ return NULL;
+ }
+ }
+ /* select prf algorithm */
+ if (select_algo(this->prf_algos, other->prf_algos, private,
+ &add, &algo, &key_size))
+ {
+ if (add)
+ {
+ selected->add_algorithm(selected, PSEUDO_RANDOM_FUNCTION,
+ algo, key_size);
+ }
+ }
+ else
+ {
+ selected->destroy(selected);
+ DBG2(DBG_CFG, " no acceptable %N found",
+ transform_type_names, PSEUDO_RANDOM_FUNCTION);
+ return NULL;
+ }
+ /* select a DH-group */
+ if (select_algo(this->dh_groups, other->dh_groups, private,
+ &add, &algo, &key_size))
+ {
+ if (add)
+ {
+ selected->add_algorithm(selected, DIFFIE_HELLMAN_GROUP, algo, 0);
+ }
+ }
+ else
+ {
+ selected->destroy(selected);
+ DBG2(DBG_CFG, " no acceptable %N found",
+ transform_type_names, DIFFIE_HELLMAN_GROUP);
+ return NULL;
+ }
+ /* select if we use ESNs (has no private use space) */
+ if (select_algo(this->esns, other->esns, TRUE, &add, &algo, &key_size))
+ {
+ if (add)
+ {
+ selected->add_algorithm(selected, EXTENDED_SEQUENCE_NUMBERS, algo, 0);
+ }
+ }
+ else
+ {
+ selected->destroy(selected);
+ DBG2(DBG_CFG, " no acceptable %N found",
+ transform_type_names, EXTENDED_SEQUENCE_NUMBERS);
+ return NULL;
+ }
+ DBG2(DBG_CFG, " proposal matches");
+
+ /* apply SPI from "other" */
+ selected->set_spi(selected, other->spi);
+
+ /* everything matched, return new proposal */
+ return selected;
+}
+
+/**
+ * Implements proposal_t.get_protocols.
+ */
+static protocol_id_t get_protocol(private_proposal_t *this)
+{
+ return this->protocol;
+}
+
+/**
+ * Implements proposal_t.set_spi.
+ */
+static void set_spi(private_proposal_t *this, u_int64_t spi)
+{
+ this->spi = spi;
+}
+
+/**
+ * Implements proposal_t.get_spi.
+ */
+static u_int64_t get_spi(private_proposal_t *this)
+{
+ return this->spi;
+}
+
+/**
+ * Clone a algorithm list
+ */
+static void clone_algo_list(linked_list_t *list, linked_list_t *clone_list)
+{
+ algorithm_t *algo, *clone_algo;
+ enumerator_t *enumerator;
+
+ enumerator = list->create_enumerator(list);
+ while (enumerator->enumerate(enumerator, &algo))
+ {
+ clone_algo = malloc_thing(algorithm_t);
+ memcpy(clone_algo, algo, sizeof(algorithm_t));
+ clone_list->insert_last(clone_list, (void*)clone_algo);
+ }
+ enumerator->destroy(enumerator);
+}
+
+/**
+ * check if an algorithm list equals
+ */
+static bool algo_list_equals(linked_list_t *l1, linked_list_t *l2)
+{
+ enumerator_t *e1, *e2;
+ algorithm_t *alg1, *alg2;
+ bool equals = TRUE;
+
+ if (l1->get_count(l1) != l2->get_count(l2))
+ {
+ return FALSE;
+ }
+
+ e1 = l1->create_enumerator(l1);
+ e2 = l2->create_enumerator(l2);
+ while (e1->enumerate(e1, &alg1) && e2->enumerate(e2, &alg2))
+ {
+ if (alg1->algorithm != alg2->algorithm ||
+ alg1->key_size != alg2->key_size)
+ {
+ equals = FALSE;
+ break;
+ }
+ }
+ e1->destroy(e1);
+ e2->destroy(e2);
+ return equals;
+}
+
+/**
+ * Implementation of proposal_t.equals.
+ */
+static bool equals(private_proposal_t *this, private_proposal_t *other)
+{
+ if (this == other)
+ {
+ return TRUE;
+ }
+ if (this->public.equals != other->public.equals)
+ {
+ return FALSE;
+ }
+ return (
+ algo_list_equals(this->encryption_algos, other->encryption_algos) &&
+ algo_list_equals(this->integrity_algos, other->integrity_algos) &&
+ algo_list_equals(this->prf_algos, other->prf_algos) &&
+ algo_list_equals(this->dh_groups, other->dh_groups) &&
+ algo_list_equals(this->esns, other->esns));
+}
+
+/**
+ * Implements proposal_t.clone
+ */
+static proposal_t *clone_(private_proposal_t *this)
+{
+ private_proposal_t *clone = (private_proposal_t*)proposal_create(this->protocol);
+
+ clone_algo_list(this->encryption_algos, clone->encryption_algos);
+ clone_algo_list(this->integrity_algos, clone->integrity_algos);
+ clone_algo_list(this->prf_algos, clone->prf_algos);
+ clone_algo_list(this->dh_groups, clone->dh_groups);
+ clone_algo_list(this->esns, clone->esns);
+
+ clone->spi = this->spi;
+
+ return &clone->public;
+}
+
+/**
+ * Checks the proposal read from a string.
+ */
+static void check_proposal(private_proposal_t *this)
+{
+ enumerator_t *e;
+ algorithm_t *alg;
+ bool all_aead = TRUE;
+
+ e = this->encryption_algos->create_enumerator(this->encryption_algos);
+ while (e->enumerate(e, &alg))
+ {
+ if (!is_authenticated_encryption(alg->algorithm))
+ {
+ all_aead = FALSE;
+ break;
+ }
+ }
+ e->destroy(e);
+
+ if (all_aead)
+ {
+ /* if all encryption algorithms in the proposal are authenticated encryption
+ * algorithms we MUST NOT propose any integrity algorithms */
+ while (this->integrity_algos->remove_last(this->integrity_algos,
+ (void**)&alg) == SUCCESS)
+ {
+ free(alg);
+ }
+ }
+}
+
+/**
+ * add a algorithm identified by a string to the proposal.
+ */
+static status_t add_string_algo(private_proposal_t *this, chunk_t alg)
+{
+ const proposal_token_t *token = proposal_get_token(alg.ptr, alg.len);
+
+ if (token == NULL)
+ {
+ return FAILED;
+ }
+
+ add_algorithm(this, token->type, token->algorithm, token->keysize);
+
+ if (this->protocol == PROTO_IKE && token->type == INTEGRITY_ALGORITHM)
+ {
+ pseudo_random_function_t prf;
+
+ switch (token->algorithm)
+ {
+ case AUTH_HMAC_SHA1_96:
+ prf = PRF_HMAC_SHA1;
+ break;
+ case AUTH_HMAC_SHA2_256_128:
+ prf = PRF_HMAC_SHA2_256;
+ break;
+ case AUTH_HMAC_SHA2_384_192:
+ prf = PRF_HMAC_SHA2_384;
+ break;
+ case AUTH_HMAC_SHA2_512_256:
+ prf = PRF_HMAC_SHA2_512;
+ break;
+ case AUTH_HMAC_MD5_96:
+ prf = PRF_HMAC_MD5;
+ break;
+ case AUTH_AES_XCBC_96:
+ prf = PRF_AES128_XCBC;
+ break;
+ default:
+ prf = PRF_UNDEFINED;
+ }
+ if (prf != PRF_UNDEFINED)
+ {
+ add_algorithm(this, PSEUDO_RANDOM_FUNCTION, prf, 0);
+ }
+ }
+ return SUCCESS;
+}
+
+/**
+ * print all algorithms of a kind to buffer
+ */
+static int print_alg(private_proposal_t *this, char **dst, size_t *len,
+ u_int kind, void *names, bool *first)
+{
+ enumerator_t *enumerator;
+ size_t written = 0;
+ u_int16_t alg, size;
+
+ enumerator = create_enumerator(this, kind);
+ while (enumerator->enumerate(enumerator, &alg, &size))
+ {
+ if (*first)
+ {
+ written += print_in_hook(*dst, *len, "%N", names, alg);
+ *first = FALSE;
+ }
+ else
+ {
+ written += print_in_hook(*dst, *len, "/%N", names, alg);
+ }
+ if (size)
+ {
+ written += print_in_hook(*dst, *len, "_%u", size);
+ }
+ }
+ enumerator->destroy(enumerator);
+ return written;
+}
+
+/**
+ * Described in header.
+ */
+int proposal_printf_hook(char *dst, size_t len, printf_hook_spec_t *spec,
+ const void *const *args)
+{
+ private_proposal_t *this = *((private_proposal_t**)(args[0]));
+ linked_list_t *list = *((linked_list_t**)(args[0]));
+ enumerator_t *enumerator;
+ size_t written = 0;
+ bool first = TRUE;
+
+ if (this == NULL)
+ {
+ return print_in_hook(dst, len, "(null)");
+ }
+
+ if (spec->hash)
+ {
+ enumerator = list->create_enumerator(list);
+ while (enumerator->enumerate(enumerator, &this))
+ { /* call recursivly */
+ if (first)
+ {
+ written += print_in_hook(dst, len, "%P", this);
+ first = FALSE;
+ }
+ else
+ {
+ written += print_in_hook(dst, len, ", %P", this);
+ }
+ }
+ enumerator->destroy(enumerator);
+ return written;
+ }
+
+ written = print_in_hook(dst, len, "%N:", protocol_id_names, this->protocol);
+ written += print_alg(this, &dst, &len, ENCRYPTION_ALGORITHM,
+ encryption_algorithm_names, &first);
+ written += print_alg(this, &dst, &len, INTEGRITY_ALGORITHM,
+ integrity_algorithm_names, &first);
+ written += print_alg(this, &dst, &len, PSEUDO_RANDOM_FUNCTION,
+ pseudo_random_function_names, &first);
+ written += print_alg(this, &dst, &len, DIFFIE_HELLMAN_GROUP,
+ diffie_hellman_group_names, &first);
+ written += print_alg(this, &dst, &len, EXTENDED_SEQUENCE_NUMBERS,
+ extended_sequence_numbers_names, &first);
+ return written;
+}
+
+/**
+ * Implements proposal_t.destroy.
+ */
+static void destroy(private_proposal_t *this)
+{
+ this->encryption_algos->destroy_function(this->encryption_algos, free);
+ this->integrity_algos->destroy_function(this->integrity_algos, free);
+ this->prf_algos->destroy_function(this->prf_algos, free);
+ this->dh_groups->destroy_function(this->dh_groups, free);
+ this->esns->destroy_function(this->esns, free);
+ free(this);
+}
+
+/*
+ * Describtion in header-file
+ */
+proposal_t *proposal_create(protocol_id_t protocol)
+{
+ private_proposal_t *this = malloc_thing(private_proposal_t);
+
+ this->public.add_algorithm = (void (*)(proposal_t*,transform_type_t,u_int16_t,u_int16_t))add_algorithm;
+ this->public.create_enumerator = (enumerator_t* (*)(proposal_t*,transform_type_t))create_enumerator;
+ this->public.get_algorithm = (bool (*)(proposal_t*,transform_type_t,u_int16_t*,u_int16_t*))get_algorithm;
+ this->public.has_dh_group = (bool (*)(proposal_t*,diffie_hellman_group_t))has_dh_group;
+ this->public.strip_dh = (void(*)(proposal_t*))strip_dh;
+ this->public.select = (proposal_t* (*)(proposal_t*,proposal_t*,bool))select_proposal;
+ this->public.get_protocol = (protocol_id_t(*)(proposal_t*))get_protocol;
+ this->public.set_spi = (void(*)(proposal_t*,u_int64_t))set_spi;
+ this->public.get_spi = (u_int64_t(*)(proposal_t*))get_spi;
+ this->public.equals = (bool(*)(proposal_t*, proposal_t *other))equals;
+ this->public.clone = (proposal_t*(*)(proposal_t*))clone_;
+ this->public.destroy = (void(*)(proposal_t*))destroy;
+
+ this->spi = 0;
+ this->protocol = protocol;
+
+ this->encryption_algos = linked_list_create();
+ this->integrity_algos = linked_list_create();
+ this->prf_algos = linked_list_create();
+ this->dh_groups = linked_list_create();
+ this->esns = linked_list_create();
+
+ return &this->public;
+}
+
+/**
+ * Add supported IKE algorithms to proposal
+ */
+static void proposal_add_supported_ike(private_proposal_t *this)
+{
+ enumerator_t *enumerator;
+ encryption_algorithm_t encryption;
+ integrity_algorithm_t integrity;
+ pseudo_random_function_t prf;
+ diffie_hellman_group_t group;
+
+ enumerator = lib->crypto->create_crypter_enumerator(lib->crypto);
+ while (enumerator->enumerate(enumerator, &encryption))
+ {
+ switch (encryption)
+ {
+ case ENCR_AES_CBC:
+ /* we assume that we support all AES sizes */
+ add_algorithm(this, ENCRYPTION_ALGORITHM, encryption, 128);
+ add_algorithm(this, ENCRYPTION_ALGORITHM, encryption, 192);
+ add_algorithm(this, ENCRYPTION_ALGORITHM, encryption, 256);
+ break;
+ case ENCR_3DES:
+ case ENCR_AES_CTR:
+ case ENCR_AES_CCM_ICV8:
+ case ENCR_AES_CCM_ICV12:
+ case ENCR_AES_CCM_ICV16:
+ case ENCR_AES_GCM_ICV8:
+ case ENCR_AES_GCM_ICV12:
+ case ENCR_AES_GCM_ICV16:
+ add_algorithm(this, ENCRYPTION_ALGORITHM, encryption, 0);
+ break;
+ case ENCR_DES:
+ /* no, thanks */
+ break;
+ default:
+ break;
+ }
+ }
+ enumerator->destroy(enumerator);
+
+ enumerator = lib->crypto->create_signer_enumerator(lib->crypto);
+ while (enumerator->enumerate(enumerator, &integrity))
+ {
+ switch (integrity)
+ {
+ case AUTH_HMAC_SHA1_96:
+ case AUTH_HMAC_SHA2_256_128:
+ case AUTH_HMAC_SHA2_384_192:
+ case AUTH_HMAC_SHA2_512_256:
+ case AUTH_HMAC_MD5_96:
+ case AUTH_AES_XCBC_96:
+ add_algorithm(this, INTEGRITY_ALGORITHM, integrity, 0);
+ break;
+ default:
+ break;
+ }
+ }
+ enumerator->destroy(enumerator);
+
+ enumerator = lib->crypto->create_prf_enumerator(lib->crypto);
+ while (enumerator->enumerate(enumerator, &prf))
+ {
+ switch (prf)
+ {
+ case PRF_HMAC_SHA1:
+ case PRF_HMAC_SHA2_256:
+ case PRF_HMAC_SHA2_384:
+ case PRF_HMAC_SHA2_512:
+ case PRF_HMAC_MD5:
+ case PRF_AES128_XCBC:
+ add_algorithm(this, PSEUDO_RANDOM_FUNCTION, prf, 0);
+ break;
+ default:
+ break;
+ }
+ }
+ enumerator->destroy(enumerator);
+
+ enumerator = lib->crypto->create_dh_enumerator(lib->crypto);
+ while (enumerator->enumerate(enumerator, &group))
+ {
+ switch (group)
+ {
+ case MODP_NULL:
+ /* only for testing purposes */
+ break;
+ case MODP_768_BIT:
+ /* weak */
+ break;
+ case MODP_1024_BIT:
+ case MODP_1536_BIT:
+ case MODP_2048_BIT:
+ case MODP_4096_BIT:
+ case MODP_8192_BIT:
+ case ECP_256_BIT:
+ case ECP_384_BIT:
+ case ECP_521_BIT:
+ case MODP_1024_160:
+ case MODP_2048_224:
+ case MODP_2048_256:
+ case ECP_192_BIT:
+ case ECP_224_BIT:
+ add_algorithm(this, DIFFIE_HELLMAN_GROUP, group, 0);
+ break;
+ default:
+ break;
+ }
+ }
+ enumerator->destroy(enumerator);
+}
+
+/*
+ * Describtion in header-file
+ */
+proposal_t *proposal_create_default(protocol_id_t protocol)
+{
+ private_proposal_t *this = (private_proposal_t*)proposal_create(protocol);
+
+ switch (protocol)
+ {
+ case PROTO_IKE:
+ proposal_add_supported_ike(this);
+ break;
+ case PROTO_ESP:
+ add_algorithm(this, ENCRYPTION_ALGORITHM, ENCR_AES_CBC, 128);
+ add_algorithm(this, ENCRYPTION_ALGORITHM, ENCR_AES_CBC, 192);
+ add_algorithm(this, ENCRYPTION_ALGORITHM, ENCR_AES_CBC, 256);
+ add_algorithm(this, ENCRYPTION_ALGORITHM, ENCR_3DES, 0);
+ add_algorithm(this, ENCRYPTION_ALGORITHM, ENCR_BLOWFISH, 256);
+ add_algorithm(this, INTEGRITY_ALGORITHM, AUTH_HMAC_SHA1_96, 0);
+ add_algorithm(this, INTEGRITY_ALGORITHM, AUTH_AES_XCBC_96, 0);
+ add_algorithm(this, INTEGRITY_ALGORITHM, AUTH_HMAC_MD5_96, 0);
+ add_algorithm(this, EXTENDED_SEQUENCE_NUMBERS, NO_EXT_SEQ_NUMBERS, 0);
+ break;
+ case PROTO_AH:
+ add_algorithm(this, INTEGRITY_ALGORITHM, AUTH_HMAC_SHA1_96, 0);
+ add_algorithm(this, INTEGRITY_ALGORITHM, AUTH_AES_XCBC_96, 0);
+ add_algorithm(this, INTEGRITY_ALGORITHM, AUTH_HMAC_MD5_96, 0);
+ add_algorithm(this, EXTENDED_SEQUENCE_NUMBERS, NO_EXT_SEQ_NUMBERS, 0);
+ break;
+ default:
+ break;
+ }
+ return &this->public;
+}
+
+/*
+ * Describtion in header-file
+ */
+proposal_t *proposal_create_from_string(protocol_id_t protocol, const char *algs)
+{
+ private_proposal_t *this = (private_proposal_t*)proposal_create(protocol);
+ chunk_t string = {(void*)algs, strlen(algs)};
+ chunk_t alg;
+ status_t status = SUCCESS;
+
+ eat_whitespace(&string);
+ if (string.len < 1)
+ {
+ destroy(this);
+ return NULL;
+ }
+
+ /* get all tokens, separated by '-' */
+ while (extract_token(&alg, '-', &string))
+ {
+ status |= add_string_algo(this, alg);
+ }
+ if (string.len)
+ {
+ status |= add_string_algo(this, string);
+ }
+ if (status != SUCCESS)
+ {
+ destroy(this);
+ return NULL;
+ }
+
+ check_proposal(this);
+
+ if (protocol == PROTO_AH || protocol == PROTO_ESP)
+ {
+ add_algorithm(this, EXTENDED_SEQUENCE_NUMBERS, NO_EXT_SEQ_NUMBERS, 0);
+ }
+ return &this->public;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 10:34:53 +0000