Include stdint.h for UINTxx_MAX defines
[strongswan.git] / src / libcharon / encoding / payloads / transform_attribute.c
index 7d21258..d20f77c 100644 (file)
 
 #include <string.h>
 #include <stddef.h>
 
 #include <string.h>
 #include <stddef.h>
+#include <stdint.h>
 
 #include "transform_attribute.h"
 
 #include <encoding/payloads/encodings.h>
 #include <library.h>
 
 
 #include "transform_attribute.h"
 
 #include <encoding/payloads/encodings.h>
 #include <library.h>
 
+ENUM(tattr_ph1_names, TATTR_PH1_ENCRYPTION_ALGORITHM, TATTR_PH1_GROUP_ORDER,
+       "ENCRYPTION_ALGORITHM",
+       "HASH_ALGORITHM",
+       "AUTH_METHOD",
+       "GROUP",
+       "GROUP_TYPE",
+       "GROUP_PRIME",
+       "GROUP_GENONE",
+       "GROUP_GENTWO",
+       "GROUP_CURVE_A",
+       "GROUP_CURVE_B",
+       "LIFE_TYPE",
+       "LIFE_DURATION",
+       "PRF",
+       "KEY_LENGTH",
+       "FIELD_SIZE",
+       "GROUP_ORDER",
+);
+
+ENUM(tattr_ph2_names, TATTR_PH2_SA_LIFE_TYPE, TATTR_PH2_EXT_SEQ_NUMBER,
+       "SA_LIFE_TYPE",
+       "SA_LIFE_DURATION",
+       "GROUP",
+       "ENCAP_MODE",
+       "AUTH_ALGORITHM",
+       "KEY_LENGTH",
+       "KEY_ROUNDS",
+       "COMP_DICT_SIZE",
+       "COMP_PRIV_ALGORITHM",
+       "ECN_TUNNEL",
+       "EXT_SEQ_NUMBER",
+);
+
+ENUM(tattr_ikev2_names, TATTR_IKEV2_KEY_LENGTH, TATTR_IKEV2_KEY_LENGTH,
+       "KEY_LENGTH",
+);
+
+
 typedef struct private_transform_attribute_t private_transform_attribute_t;
 
 /**
 typedef struct private_transform_attribute_t private_transform_attribute_t;
 
 /**
@@ -57,30 +96,25 @@ struct private_transform_attribute_t {
         * Attribute value as chunk if attribute_format is 0 (FALSE).
         */
        chunk_t attribute_value;
         * Attribute value as chunk if attribute_format is 0 (FALSE).
         */
        chunk_t attribute_value;
-};
-
 
 
-ENUM_BEGIN(transform_attribute_type_name, ATTRIBUTE_UNDEFINED, ATTRIBUTE_UNDEFINED,
-       "ATTRIBUTE_UNDEFINED");
-ENUM_NEXT(transform_attribute_type_name, KEY_LENGTH, KEY_LENGTH, ATTRIBUTE_UNDEFINED,
-       "KEY_LENGTH");
-ENUM_END(transform_attribute_type_name, KEY_LENGTH);
+       /**
+        * Payload type, TRANSFORM_ATTRIBUTE or TRANSFORM_ATTRIBUTE_V1
+        */
+       payload_type_t type;
+};
 
 /**
 
 /**
- * Encoding rules to parse or generate a Transform attribute.
- *
- * The defined offsets are the positions in a object of type
- * private_transform_attribute_t.
+ * Encoding rules for IKEv1/IKEv2 transform attributes
  */
  */
-encoding_rule_t transform_attribute_encodings[] = {
+static encoding_rule_t encodings[] = {
        /* Flag defining the format of this payload */
        /* Flag defining the format of this payload */
-       { ATTRIBUTE_FORMAT,                     offsetof(private_transform_attribute_t, attribute_format)                       },
+       { ATTRIBUTE_FORMAT,                     offsetof(private_transform_attribute_t, attribute_format)                       },
        /* type of the attribute as 15 bit unsigned integer */
        { ATTRIBUTE_TYPE,                       offsetof(private_transform_attribute_t, attribute_type)                         },
        /* Length or value, depending on the attribute format flag */
        { ATTRIBUTE_LENGTH_OR_VALUE,offsetof(private_transform_attribute_t, attribute_length_or_value)  },
        /* Value of attribute if attribute format flag is zero */
        /* type of the attribute as 15 bit unsigned integer */
        { ATTRIBUTE_TYPE,                       offsetof(private_transform_attribute_t, attribute_type)                         },
        /* Length or value, depending on the attribute format flag */
        { ATTRIBUTE_LENGTH_OR_VALUE,offsetof(private_transform_attribute_t, attribute_length_or_value)  },
        /* Value of attribute if attribute format flag is zero */
-       { ATTRIBUTE_VALUE,                      offsetof(private_transform_attribute_t, attribute_value)                        }
+       { ATTRIBUTE_VALUE,                      offsetof(private_transform_attribute_t, attribute_value)                        }
 };
 
 /*
 };
 
 /*
@@ -101,18 +135,23 @@ METHOD(payload_t, verify, status_t,
        return SUCCESS;
 }
 
        return SUCCESS;
 }
 
-METHOD(payload_t, get_encoding_rules, void,
-       private_transform_attribute_t *this, encoding_rule_t **rules,
-       size_t *rule_count)
+METHOD(payload_t, get_encoding_rules, int,
+       private_transform_attribute_t *this, encoding_rule_t **rules)
 {
 {
-       *rules = transform_attribute_encodings;
-       *rule_count = countof(transform_attribute_encodings);
+       *rules = encodings;
+       return countof(encodings);
+}
+
+METHOD(payload_t, get_header_length, int,
+       private_transform_attribute_t *this)
+{
+       return 0;
 }
 
 METHOD(payload_t, get_type, payload_type_t,
        private_transform_attribute_t *this)
 {
 }
 
 METHOD(payload_t, get_type, payload_type_t,
        private_transform_attribute_t *this)
 {
-       return TRANSFORM_ATTRIBUTE;
+       return this->type;
 }
 
 METHOD(payload_t, get_next_type, payload_type_t,
 }
 
 METHOD(payload_t, get_next_type, payload_type_t,
@@ -136,31 +175,6 @@ METHOD(payload_t, get_length, size_t,
        return this->attribute_length_or_value + 4;
 }
 
        return this->attribute_length_or_value + 4;
 }
 
-METHOD(transform_attribute_t, set_value_chunk, void,
-       private_transform_attribute_t *this, chunk_t value)
-{
-       chunk_free(&this->attribute_value);
-
-       if (value.len != 2)
-       {
-               this->attribute_value = chunk_clone(value);
-               this->attribute_length_or_value = value.len;
-               this->attribute_format = FALSE;
-       }
-       else
-       {
-               memcpy(&this->attribute_length_or_value, value.ptr, value.len);
-       }
-}
-
-METHOD(transform_attribute_t, set_value, void,
-       private_transform_attribute_t *this, u_int16_t value)
-{
-       chunk_free(&this->attribute_value);
-       this->attribute_length_or_value = value;
-       this->attribute_format = TRUE;
-}
-
 METHOD(transform_attribute_t, get_value_chunk, chunk_t,
        private_transform_attribute_t *this)
 {
 METHOD(transform_attribute_t, get_value_chunk, chunk_t,
        private_transform_attribute_t *this)
 {
@@ -171,16 +185,22 @@ METHOD(transform_attribute_t, get_value_chunk, chunk_t,
        return this->attribute_value;
 }
 
        return this->attribute_value;
 }
 
-METHOD(transform_attribute_t, get_value, u_int16_t,
+METHOD(transform_attribute_t, get_value, u_int64_t,
        private_transform_attribute_t *this)
 {
        private_transform_attribute_t *this)
 {
-       return this->attribute_length_or_value;
-}
+       u_int64_t value = 0;
 
 
-METHOD(transform_attribute_t, set_attribute_type, void,
-       private_transform_attribute_t *this, u_int16_t type)
-{
-       this->attribute_type = type & 0x7FFF;
+       if (this->attribute_format)
+       {
+               return this->attribute_length_or_value;
+       }
+       if (this->attribute_value.len > sizeof(value))
+       {
+               return UINT64_MAX;
+       }
+       memcpy(((char*)&value) + sizeof(value) - this->attribute_value.len,
+                  this->attribute_value.ptr, this->attribute_value.len);
+       return untoh64((char*)&value);
 }
 
 METHOD(transform_attribute_t, get_attribute_type, u_int16_t,
 }
 
 METHOD(transform_attribute_t, get_attribute_type, u_int16_t,
@@ -189,24 +209,6 @@ METHOD(transform_attribute_t, get_attribute_type, u_int16_t,
        return this->attribute_type;
 }
 
        return this->attribute_type;
 }
 
-METHOD(transform_attribute_t, clone_, transform_attribute_t*,
-       private_transform_attribute_t *this)
-{
-       private_transform_attribute_t *new_clone;
-
-       new_clone = (private_transform_attribute_t *)transform_attribute_create();
-
-       new_clone->attribute_format = this->attribute_format;
-       new_clone->attribute_type = this->attribute_type;
-       new_clone->attribute_length_or_value = this->attribute_length_or_value;
-
-       if (!new_clone->attribute_format)
-       {
-               new_clone->attribute_value = chunk_clone(this->attribute_value);
-       }
-       return &new_clone->public;
-}
-
 METHOD2(payload_t, transform_attribute_t, destroy, void,
        private_transform_attribute_t *this)
 {
 METHOD2(payload_t, transform_attribute_t, destroy, void,
        private_transform_attribute_t *this)
 {
@@ -217,7 +219,7 @@ METHOD2(payload_t, transform_attribute_t, destroy, void,
 /*
  * Described in header.
  */
 /*
  * Described in header.
  */
-transform_attribute_t *transform_attribute_create()
+transform_attribute_t *transform_attribute_create(payload_type_t type)
 {
        private_transform_attribute_t *this;
 
 {
        private_transform_attribute_t *this;
 
@@ -226,22 +228,20 @@ transform_attribute_t *transform_attribute_create()
                        .payload_interface = {
                                .verify = _verify,
                                .get_encoding_rules = _get_encoding_rules,
                        .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,
                                .get_type = _get_type,
                                .destroy = _destroy,
                        },
                                .get_length = _get_length,
                                .get_next_type = _get_next_type,
                                .set_next_type = _set_next_type,
                                .get_type = _get_type,
                                .destroy = _destroy,
                        },
-                       .set_value_chunk = _set_value_chunk,
-                       .set_value = _set_value,
                        .get_value_chunk = _get_value_chunk,
                        .get_value = _get_value,
                        .get_value_chunk = _get_value_chunk,
                        .get_value = _get_value,
-                       .set_attribute_type = _set_attribute_type,
                        .get_attribute_type = _get_attribute_type,
                        .get_attribute_type = _get_attribute_type,
-                       .clone = _clone_,
                        .destroy = _destroy,
                },
                        .destroy = _destroy,
                },
-               .attribute_format = TRUE,
+               .attribute_format = FALSE,
+               .type = type,
        );
        return &this->public;
 }
        );
        return &this->public;
 }
@@ -249,10 +249,33 @@ transform_attribute_t *transform_attribute_create()
 /*
  * Described in header.
  */
 /*
  * Described in header.
  */
-transform_attribute_t *transform_attribute_create_key_length(u_int16_t key_length)
+transform_attribute_t *transform_attribute_create_value(payload_type_t type,
+                                                       transform_attribute_type_t kind, u_int64_t value)
 {
 {
-       transform_attribute_t *attribute = transform_attribute_create();
-       attribute->set_attribute_type(attribute, KEY_LENGTH);
-       attribute->set_value(attribute, key_length);
-       return attribute;
+       private_transform_attribute_t *this;
+
+       this = (private_transform_attribute_t*)transform_attribute_create(type);
+
+       this->attribute_type = kind & 0x7FFF;
+
+       if (value <= UINT16_MAX)
+       {
+               this->attribute_length_or_value = value;
+               this->attribute_format = TRUE;
+       }
+       else if (value <= UINT32_MAX)
+       {
+               u_int32_t val32;
+
+               val32 = htonl(value);
+               this->attribute_value = chunk_clone(chunk_from_thing(val32));
+               this->attribute_length_or_value = sizeof(val32);
+       }
+       else
+       {
+               htoun64(&value, value);
+               this->attribute_value = chunk_clone(chunk_from_thing(value));
+               this->attribute_length_or_value = sizeof(value);
+       }
+       return &this->public;
 }
 }