Openswan支持的算法及参数信息：

数据封装加密算法：
algorithm ESP encrypt: id=2, name=ESP_DES, ivlen=8, keysizemin=64, keysizemax=64
algorithm ESP encrypt: id=3, name=ESP_3DES, ivlen=8, keysizemin=192, keysizemax=192
algorithm ESP encrypt: id=6, name=ESP_CAST, ivlen=8, keysizemin=40, keysizemax=128
algorithm ESP encrypt: id=7, name=ESP_BLOWFISH, ivlen=8, keysizemin=40, keysizemax=448
algorithm ESP encrypt: id=11, name=ESP_NULL, ivlen=0, keysizemin=0, keysizemax=0
algorithm ESP encrypt: id=12, name=ESP_AES, ivlen=8, keysizemin=128, keysizemax=256
algorithm ESP encrypt: id=13, name=ESP_AES_CTR, ivlen=8, keysizemin=160, keysizemax=288
algorithm ESP encrypt: id=14, name=ESP_AES_CCM_A, ivlen=8, keysizemin=128, keysizemax=256
algorithm ESP encrypt: id=15, name=ESP_AES_CCM_B, ivlen=8, keysizemin=128, keysizemax=256
algorithm ESP encrypt: id=16, name=ESP_AES_CCM_C, ivlen=8, keysizemin=128, keysizemax=256
algorithm ESP encrypt: id=18, name=ESP_AES_GCM_A, ivlen=8, keysizemin=160, keysizemax=288
algorithm ESP encrypt: id=19, name=ESP_AES_GCM_B, ivlen=12, keysizemin=160, keysizemax=288
algorithm ESP encrypt: id=20, name=ESP_AES_GCM_C, ivlen=16, keysizemin=160, keysizemax=288
algorithm ESP encrypt: id=22, name=ESP_CAMELLIA, ivlen=8, keysizemin=128, keysizemax=256
algorithm ESP encrypt: id=252, name=ESP_SERPENT, ivlen=8, keysizemin=128, keysizemax=256
algorithm ESP encrypt: id=253, name=ESP_TWOFISH, ivlen=8, keysizemin=128, keysizemax=256
数据封装认证算法：
algorithm ESP auth attr: id=1, name=AUTH_ALGORITHM_HMAC_MD5, keysizemin=128, keysizemax=128
algorithm ESP auth attr: id=2, name=AUTH_ALGORITHM_HMAC_SHA1, keysizemin=160, keysizemax=160
algorithm ESP auth attr: id=5, name=AUTH_ALGORITHM_HMAC_SHA2_256, keysizemin=256, keysizemax=256
algorithm ESP auth attr: id=6, name=AUTH_ALGORITHM_HMAC_SHA2_384, keysizemin=384, keysizemax=384
algorithm ESP auth attr: id=7, name=AUTH_ALGORITHM_HMAC_SHA2_512, keysizemin=512, keysizemax=512
algorithm ESP auth attr: id=8, name=AUTH_ALGORITHM_HMAC_RIPEMD, keysizemin=160, keysizemax=160
algorithm ESP auth attr: id=9, name=AUTH_ALGORITHM_AES_CBC, keysizemin=128, keysizemax=128
algorithm ESP auth attr: id=251, name=AUTH_ALGORITHM_NULL_KAME, keysizemin=0, keysizemax=0

ISAKMP协商阶段加密算法：
algorithm IKE encrypt: id=0, name=(null), blocksize=16, keydeflen=131
algorithm IKE encrypt: id=5, name=OAKLEY_3DES_CBC, blocksize=8, keydeflen=192
algorithm IKE encrypt: id=7, name=OAKLEY_AES_CBC, blocksize=16, keydeflen=128

ISAKMP协商阶段hash算法：
algorithm IKE hash: id=1, name=OAKLEY_MD5, hashsize=16
algorithm IKE hash: id=2, name=OAKLEY_SHA1, hashsize=20
algorithm IKE hash: id=4, name=OAKLEY_SHA2_256, hashsize=32
algorithm IKE hash: id=6, name=OAKLEY_SHA2_512, hashsize=64

ISAKMP协商阶段DH组：
algorithm IKE dh group: id=2, name=OAKLEY_GROUP_MODP1024, bits=1024
algorithm IKE dh group: id=5, name=OAKLEY_GROUP_MODP1536, bits=1536
algorithm IKE dh group: id=14, name=OAKLEY_GROUP_MODP2048, bits=2048
algorithm IKE dh group: id=15, name=OAKLEY_GROUP_MODP3072, bits=3072
algorithm IKE dh group: id=16, name=OAKLEY_GROUP_MODP4096, bits=4096
algorithm IKE dh group: id=17, name=OAKLEY_GROUP_MODP6144, bits=6144
algorithm IKE dh group: id=18, name=OAKLEY_GROUP_MODP8192, bits=8192
algorithm IKE dh group: id=22, name=OAKLEY_GROUP_DH22, bits=1024
algorithm IKE dh group: id=23, name=OAKLEY_GROUP_DH23, bits=2048
algorithm IKE dh group: id=24, name=OAKLEY_GROUP_DH24, bits=2048