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Diffstat (limited to 'src/libcharon/encoding/payloads/ike_header.c')
-rw-r--r--src/libcharon/encoding/payloads/ike_header.c195
1 files changed, 153 insertions, 42 deletions
diff --git a/src/libcharon/encoding/payloads/ike_header.c b/src/libcharon/encoding/payloads/ike_header.c
index 24d22f3a1..58b624192 100644
--- a/src/libcharon/encoding/payloads/ike_header.c
+++ b/src/libcharon/encoding/payloads/ike_header.c
@@ -81,12 +81,27 @@ struct private_ike_header_t {
* TRUE, if this is a response, FALSE if its a Request.
*/
bool response;
+
+ /**
+ * TRUE, if the packet is encrypted (IKEv1).
+ */
+ bool encryption;
+
+ /**
+ * TRUE, if the commit flag is set (IKEv1).
+ */
+ bool commit;
+
+ /**
+ * TRUE, if the auth only flag is set (IKEv1).
+ */
+ bool authonly;
} flags;
/**
* Reserved bits of IKE header
*/
- bool reserved[5];
+ bool reserved[2];
/**
* Associated Message-ID.
@@ -99,9 +114,15 @@ struct private_ike_header_t {
u_int32_t length;
};
-ENUM_BEGIN(exchange_type_names, EXCHANGE_TYPE_UNDEFINED, EXCHANGE_TYPE_UNDEFINED,
- "EXCHANGE_TYPE_UNDEFINED");
-ENUM_NEXT(exchange_type_names, IKE_SA_INIT, IKE_SESSION_RESUME, EXCHANGE_TYPE_UNDEFINED,
+ENUM_BEGIN(exchange_type_names, ID_PROT, TRANSACTION,
+ "ID_PROT",
+ "AUTH_ONLY",
+ "AGGRESSIVE",
+ "INFORMATIONAL_V1",
+ "TRANSACTION");
+ENUM_NEXT(exchange_type_names, QUICK_MODE, IKE_SESSION_RESUME, TRANSACTION,
+ "QUICK_MODE",
+ "NEW_GROUP_MODE",
"IKE_SA_INIT",
"IKE_AUTH",
"CREATE_CHILD_SA",
@@ -110,18 +131,23 @@ ENUM_NEXT(exchange_type_names, IKE_SA_INIT, IKE_SESSION_RESUME, EXCHANGE_TYPE_UN
#ifdef ME
ENUM_NEXT(exchange_type_names, ME_CONNECT, ME_CONNECT, IKE_SESSION_RESUME,
"ME_CONNECT");
-ENUM_END(exchange_type_names, ME_CONNECT);
+ENUM_NEXT(exchange_type_names, EXCHANGE_TYPE_UNDEFINED,
+ EXCHANGE_TYPE_UNDEFINED, ME_CONNECT,
+ "EXCHANGE_TYPE_UNDEFINED");
#else
-ENUM_END(exchange_type_names, IKE_SESSION_RESUME);
+ENUM_NEXT(exchange_type_names, EXCHANGE_TYPE_UNDEFINED,
+ EXCHANGE_TYPE_UNDEFINED, IKE_SESSION_RESUME,
+ "EXCHANGE_TYPE_UNDEFINED");
#endif /* ME */
+ENUM_END(exchange_type_names, EXCHANGE_TYPE_UNDEFINED);
/**
- * Encoding rules to parse or generate a IKEv2-Header.
+ * Encoding rules to parse or generate a IKE-Header.
*
* The defined offsets are the positions in a object of type
* ike_header_t.
*/
-encoding_rule_t ike_header_encodings[] = {
+static encoding_rule_t encodings[] = {
/* 8 Byte SPI, stored in the field initiator_spi */
{ IKE_SPI, offsetof(private_ike_header_t, initiator_spi) },
/* 8 Byte SPI, stored in the field responder_spi */
@@ -137,22 +163,20 @@ encoding_rule_t ike_header_encodings[] = {
/* 2 Bit reserved bits */
{ RESERVED_BIT, offsetof(private_ike_header_t, reserved[0]) },
{ RESERVED_BIT, offsetof(private_ike_header_t, reserved[1]) },
- /* 3 Bit flags, stored in the fields response, version and initiator */
+ /* 6 flags */
{ FLAG, offsetof(private_ike_header_t, flags.response) },
{ FLAG, offsetof(private_ike_header_t, flags.version) },
{ FLAG, offsetof(private_ike_header_t, flags.initiator) },
- /* 3 Bit reserved bits */
- { RESERVED_BIT, offsetof(private_ike_header_t, reserved[2]) },
- { RESERVED_BIT, offsetof(private_ike_header_t, reserved[3]) },
- { RESERVED_BIT, offsetof(private_ike_header_t, reserved[4]) },
+ { FLAG, offsetof(private_ike_header_t, flags.authonly) },
+ { FLAG, offsetof(private_ike_header_t, flags.commit) },
+ { FLAG, offsetof(private_ike_header_t, flags.encryption)},
/* 4 Byte message id, stored in the field message_id */
{ U_INT_32, offsetof(private_ike_header_t, message_id) },
/* 4 Byte length fied, stored in the field length */
- { HEADER_LENGTH,offsetof(private_ike_header_t, length) },
+ { HEADER_LENGTH, offsetof(private_ike_header_t, length) }
};
-
-/* 1 2 3
+/* 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
! IKE_SA Initiator's SPI !
@@ -172,35 +196,67 @@ encoding_rule_t ike_header_encodings[] = {
METHOD(payload_t, verify, status_t,
private_ike_header_t *this)
{
- if ((this->exchange_type < IKE_SA_INIT) ||
- ((this->exchange_type > INFORMATIONAL)
+ switch (this->exchange_type)
+ {
+ case ID_PROT:
+ case AGGRESSIVE:
+ if (this->message_id != 0)
+ {
+ return FAILED;
+ }
+ /* fall */
+ case AUTH_ONLY:
+ case INFORMATIONAL_V1:
+ case TRANSACTION:
+ case QUICK_MODE:
+ case NEW_GROUP_MODE:
+ if (this->maj_version != IKEV1_MAJOR_VERSION)
+ {
+ return FAILED;
+ }
+ break;
+ case IKE_SA_INIT:
+ case IKE_AUTH:
+ case CREATE_CHILD_SA:
+ case INFORMATIONAL:
+ case IKE_SESSION_RESUME:
#ifdef ME
- && (this->exchange_type != ME_CONNECT)
+ case ME_CONNECT:
#endif /* ME */
- ))
- {
- /* unsupported exchange type */
- return FAILED;
+ if (this->maj_version != IKEV2_MAJOR_VERSION)
+ {
+ return FAILED;
+ }
+ break;
+ default:
+ /* unsupported exchange type */
+ return FAILED;
}
- if (this->initiator_spi == 0
+ if (this->initiator_spi == 0)
+ {
#ifdef ME
- /* we allow zero spi for INFORMATIONAL exchanges,
- * to allow connectivity checks */
- && this->exchange_type != INFORMATIONAL
+ if (this->exchange_type != INFORMATIONAL)
+ /* we allow zero spi for INFORMATIONAL exchanges,
+ * to allow connectivity checks */
#endif /* ME */
- )
- {
- /* initiator spi not set */
- return FAILED;
+ {
+ return FAILED;
+ }
}
return SUCCESS;
}
-METHOD(payload_t, get_encoding_rules, void,
- private_ike_header_t *this, encoding_rule_t **rules, size_t *rule_count)
+METHOD(payload_t, get_encoding_rules, int,
+ private_ike_header_t *this, encoding_rule_t **rules)
+{
+ *rules = encodings;
+ return countof(encodings);
+}
+
+METHOD(payload_t, get_header_length, int,
+ private_ike_header_t *this)
{
- *rules = ike_header_encodings;
- *rule_count = sizeof(ike_header_encodings) / sizeof(encoding_rule_t);
+ return IKE_HEADER_LENGTH;
}
METHOD(payload_t, get_type, payload_type_t,
@@ -311,6 +367,43 @@ METHOD(ike_header_t, set_initiator_flag, void,
this->flags.initiator = initiator;
}
+METHOD(ike_header_t, get_encryption_flag, bool,
+ private_ike_header_t *this)
+{
+ return this->flags.encryption;
+}
+
+METHOD(ike_header_t, set_encryption_flag, void,
+ private_ike_header_t *this, bool encryption)
+{
+ this->flags.encryption = encryption;
+}
+
+
+METHOD(ike_header_t, get_commit_flag, bool,
+ private_ike_header_t *this)
+{
+ return this->flags.commit;
+}
+
+METHOD(ike_header_t, set_commit_flag, void,
+ private_ike_header_t *this, bool commit)
+{
+ this->flags.commit = commit;
+}
+
+METHOD(ike_header_t, get_authonly_flag, bool,
+ private_ike_header_t *this)
+{
+ return this->flags.authonly;
+}
+
+METHOD(ike_header_t, set_authonly_flag, void,
+ private_ike_header_t *this, bool authonly)
+{
+ this->flags.authonly = authonly;
+}
+
METHOD(ike_header_t, get_exchange_type, u_int8_t,
private_ike_header_t *this)
{
@@ -353,6 +446,7 @@ ike_header_t *ike_header_create()
.payload_interface = {
.verify = _verify,
.get_encoding_rules = _get_encoding_rules,
+ .get_header_length = _get_header_length,
.get_length = _get_length,
.get_next_type = _get_next_type,
.set_next_type = _set_next_type,
@@ -373,21 +467,38 @@ ike_header_t *ike_header_create()
.set_version_flag = _set_version_flag,
.get_initiator_flag = _get_initiator_flag,
.set_initiator_flag = _set_initiator_flag,
+ .get_encryption_flag = _get_encryption_flag,
+ .set_encryption_flag = _set_encryption_flag,
+ .get_commit_flag = _get_commit_flag,
+ .set_commit_flag = _set_commit_flag,
+ .get_authonly_flag = _get_authonly_flag,
+ .set_authonly_flag = _set_authonly_flag,
.get_exchange_type = _get_exchange_type,
.set_exchange_type = _set_exchange_type,
.get_message_id = _get_message_id,
.set_message_id = _set_message_id,
.destroy = _destroy,
},
- .maj_version = IKE_MAJOR_VERSION,
- .min_version = IKE_MINOR_VERSION,
- .exchange_type = EXCHANGE_TYPE_UNDEFINED,
- .flags = {
- .initiator = TRUE,
- .version = HIGHER_VERSION_SUPPORTED_FLAG,
- },
.length = IKE_HEADER_LENGTH,
+ .exchange_type = EXCHANGE_TYPE_UNDEFINED,
);
return &this->public;
}
+
+/*
+ * Described in header.
+ */
+ike_header_t *ike_header_create_version(int major, int minor)
+{
+ ike_header_t *this = ike_header_create();
+
+ this->set_maj_version(this, major);
+ this->set_min_version(this, minor);
+ if (major == IKEV2_MAJOR_VERSION)
+ {
+ this->set_initiator_flag(this, TRUE);
+ }
+ return this;
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 14:46:40 +0000