* THE SOFTWARE.
*/
+#define _GNU_SOURCE
+
#include "save_keys_listener.h"
+#include <stdio.h>
+#include <inttypes.h>
+#include <errno.h>
+
+#include <daemon.h>
+
typedef struct private_save_keys_listener_t private_save_keys_listener_t;
+typedef struct algo_map_t algo_map_t;
+
+/**
+ * Name for IKEv1 decryption table file
+ */
+static char *ikev1_name = "ikev1_decryption_table";
+
+/**
+ * Name for IKEv2 decryption table file
+ */
+static char *ikev2_name = "ikev2_decryption_table";
/**
* Private data.
* Public interface.
*/
save_keys_listener_t public;
+
+ /**
+ * Path to the directory where the decryption tables will be stored.
+ */
+ char *path;
};
METHOD(save_keys_listener_t, destroy, void,
free(this);
}
+/**
+ * Mapping strongSwan identifiers to Wireshark names
+ */
+struct algo_map_t {
+
+ /**
+ * IKE identifier
+ */
+ const uint16_t ike;
+
+ /**
+ * Optional key length
+ */
+ const int key_len;
+
+ /**
+ * Name of the algorithm in wireshark
+ */
+ const char *name;
+};
+
+/**
+ * Map an algorithm identifier to a name
+ */
+static inline const char *algo_name(algo_map_t *map, int count,
+ uint16_t alg, int key_len)
+{
+ int i;
+
+ for (i = 0; i < count; i++)
+ {
+ if (map[i].ike == alg)
+ {
+ if (map[i].key_len == -1 || map[i].key_len == key_len)
+ {
+ return map[i].name;
+ }
+ }
+ }
+ return NULL;
+}
+
+/**
+ * Wireshark IKE algorithm identifiers for encryption
+ */
+static algo_map_t ike_encr[] = {
+ { ENCR_3DES, -1, "3DES [RFC2451]" },
+ { ENCR_NULL, -1, "NULL [RFC2410]" },
+ { ENCR_AES_CBC, 128, "AES-CBC-128 [RFC3602]" },
+ { ENCR_AES_CBC, 192, "AES-CBC-192 [RFC3602]" },
+ { ENCR_AES_CBC, 256, "AES-CBC-256 [RFC3602]" },
+ { ENCR_AES_CTR, 128, "AES-CTR-128 [RFC5930]" },
+ { ENCR_AES_CTR, 192, "AES-CTR-192 [RFC5930]" },
+ { ENCR_AES_CTR, 256, "AES-CTR-256 [RFC5930]" },
+ { ENCR_AES_GCM_ICV8, 128, "AES-GCM-128 with 8 octet ICV [RFC5282]" },
+ { ENCR_AES_GCM_ICV8, 192, "AES-GCM-192 with 8 octet ICV [RFC5282]" },
+ { ENCR_AES_GCM_ICV8, 256, "AES-GCM-256 with 8 octet ICV [RFC5282]" },
+ { ENCR_AES_GCM_ICV12, 128, "AES-GCM-128 with 12 octet ICV [RFC5282]" },
+ { ENCR_AES_GCM_ICV12, 192, "AES-GCM-192 with 12 octet ICV [RFC5282]" },
+ { ENCR_AES_GCM_ICV12, 256, "AES-GCM-256 with 12 octet ICV [RFC5282]" },
+ { ENCR_AES_GCM_ICV16, 128, "AES-GCM-128 with 16 octet ICV [RFC5282]" },
+ { ENCR_AES_GCM_ICV16, 192, "AES-GCM-192 with 16 octet ICV [RFC5282]" },
+ { ENCR_AES_GCM_ICV16, 256, "AES-GCM-256 with 16 octet ICV [RFC5282]" },
+ { ENCR_AES_CCM_ICV8, 128, "AES-CCM-128 with 8 octet ICV [RFC5282]" },
+ { ENCR_AES_CCM_ICV8, 192, "AES-CCM-192 with 8 octet ICV [RFC5282]" },
+ { ENCR_AES_CCM_ICV8, 256, "AES-CCM-256 with 8 octet ICV [RFC5282]" },
+ { ENCR_AES_CCM_ICV12, 128, "AES-CCM-128 with 12 octet ICV [RFC5282]" },
+ { ENCR_AES_CCM_ICV12, 192, "AES-CCM-192 with 12 octet ICV [RFC5282]" },
+ { ENCR_AES_CCM_ICV12, 256, "AES-CCM-256 with 12 octet ICV [RFC5282]" },
+ { ENCR_AES_CCM_ICV16, 128, "AES-CCM-128 with 16 octet ICV [RFC5282]" },
+ { ENCR_AES_CCM_ICV16, 192, "AES-CCM-192 with 16 octet ICV [RFC5282]" },
+ { ENCR_AES_CCM_ICV16, 256, "AES-CCM-256 with 16 octet ICV [RFC5282]" },
+};
+
+/**
+ * Wireshark IKE algorithms for integrity
+ */
+static algo_map_t ike_integ[] = {
+ { AUTH_HMAC_MD5_96, -1, "HMAC_MD5_96 [RFC2403]" },
+ { AUTH_HMAC_SHA1_96, -1, "HMAC_SHA1_96 [RFC2404]" },
+ { AUTH_HMAC_MD5_128, -1, "HMAC_MD5_128 [RFC4595]" },
+ { AUTH_HMAC_SHA1_160, -1, "HMAC_SHA1_160 [RFC4595]" },
+ { AUTH_HMAC_SHA2_256_128, -1, "HMAC_SHA2_256_128 [RFC4868]" },
+ { AUTH_HMAC_SHA2_384_192, -1, "HMAC_SHA2_384_192 [RFC4868]" },
+ { AUTH_HMAC_SHA2_512_256, -1, "HMAC_SHA2_512_256 [RFC4868]" },
+ { AUTH_HMAC_SHA2_256_96, -1, "HMAC_SHA2_256_96 [draft-ietf-ipsec-ciph-sha-256-00]" },
+ { AUTH_UNDEFINED, -1, "NONE [RFC4306]" },
+};
+
+/**
+ * Map an IKE proposal
+ */
+static inline void ike_names(proposal_t *proposal, const char **enc,
+ const char **integ)
+{
+ uint16_t alg, len;
+
+ if (proposal->get_algorithm(proposal, ENCRYPTION_ALGORITHM, &alg, &len))
+ {
+ *enc = algo_name(ike_encr, countof(ike_encr), alg, len);
+ }
+ if (encryption_algorithm_is_aead(alg))
+ {
+ alg = AUTH_UNDEFINED;
+ }
+ else if (!proposal->get_algorithm(proposal, INTEGRITY_ALGORITHM, &alg, NULL))
+ {
+ return;
+ }
+ *integ = algo_name(ike_integ, countof(ike_integ), alg, -1);
+}
+
+
+METHOD(listener_t, ike_derived_keys, bool,
+ private_save_keys_listener_t *this, ike_sa_t *ike_sa, chunk_t sk_ei,
+ chunk_t sk_er, chunk_t sk_ai, chunk_t sk_ar)
+{
+ ike_version_t version;
+ ike_sa_id_t *id;
+ const char *enc = NULL, *integ = NULL;
+ char *path, *name;
+ FILE *file;
+
+ if (!this->path)
+ {
+ return TRUE;
+ }
+
+ version = ike_sa->get_version(ike_sa);
+ name = version == IKEV2 ? ikev2_name : ikev1_name;
+ if (asprintf(&path, "%s/%s", this->path, name) < 0)
+ {
+ DBG1(DBG_IKE, "failed to build path to IKE key table");
+ return TRUE;
+ }
+
+ file = fopen(path, "a");
+ if (file)
+ {
+ id = ike_sa->get_id(ike_sa);
+ if (version == IKEV2)
+ {
+ ike_names(ike_sa->get_proposal(ike_sa), &enc, &integ);
+ if (enc && integ)
+ {
+ fprintf(file, "%.16"PRIx64",%.16"PRIx64",%+B,%+B,\"%s\","
+ "%+B,%+B,\"%s\"\n", be64toh(id->get_initiator_spi(id)),
+ be64toh(id->get_responder_spi(id)), &sk_ei, &sk_er,
+ enc, &sk_ai, &sk_ar, integ);
+ }
+ }
+ else
+ {
+ fprintf(file, "%.16"PRIx64",%+B\n",
+ be64toh(id->get_initiator_spi(id)), &sk_ei);
+ }
+ fclose(file);
+ }
+ else
+ {
+ DBG1(DBG_IKE, "failed to open IKE key table '%s': %s", path,
+ strerror(errno));
+ }
+ free(path);
+ return TRUE;
+}
+
/**
* See header.
*/
INIT(this,
.public = {
.listener = {
+ .ike_derived_keys = _ike_derived_keys,
},
.destroy = _destroy,
},
+ .path = lib->settings->get_str(lib->settings,
+ "%s.plugins.save-keys.wireshark_keys",
+ NULL, lib->ns),
);
+
return &this->public;
}