SADB_AALG_MD5HMAC
{ "md5", SADB_AALG_MD5HMAC }, /* -a md5 or -u md5 */
opt.ipsr_auth_alg = SADB_AALG_MD5HMAC;
#define IPSA_AALG_MD5H SADB_AALG_MD5HMAC /* MD5-HMAC algorithm */