SECITEM_AllocItem
SECITEM_AllocItem(arena, &key->version, 1, kmflag);
SECITEM_AllocItem(arena, &key->publicValue, 2*len + 1, kmflag);
SECITEM_AllocItem(arena, &key->privateValue, len, kmflag);
SECITEM_AllocItem(NULL, derivedSecret, len, kmflag);
SECITEM_AllocItem(NULL, &pointC, 2*flen + 1, kmflag);
extern SECItem * SECITEM_AllocItem(PRArenaPool *, SECItem *, unsigned int, int);
SECITEM_AllocItem(arena, &(params->DEREncoding), encodedParams->len,
ecparams = SECITEM_AllocItem(NULL, NULL, (eccoid->Length));