add ALIAS support

Author: David Case

bap.go

@@ -29,6 +29,7 @@ const (
 	ATTEST AttestationType = "ATTEST"
 	ID     AttestationType = "ID"
 	REVOKE AttestationType = "REVOKE"
+	ALIAS  AttestationType = "ALIAS"
 )
 
 // CreateIdentity creates an identity from a private key, an id key, and a counter

bob.go

@@ -15,6 +15,7 @@ type Bap struct {
 	Sequence uint64          `json:"sequence" bson:"sequence"`
 	Type     AttestationType `json:"type,omitempty" bson:"type,omitempty"`
 	URNHash  string          `json:"urn_hash,omitempty" bson:"urn_hash,omitempty"`
+	Profile  string          `json:"profile,omitempty" bson:"profile,omitempty"`
 }
 
 // FromTape takes a bob.Tape and returns a BAP data structure
@@ -44,6 +45,9 @@ func (b *Bap) FromTape(tape *bpu.Tape) (err error) {
 	case ID:
 		b.Address = *tape.Cell[3].S
 		b.IDKey = *tape.Cell[2].S
+	case ALIAS:
+		b.IDKey = *tape.Cell[2].S
+		b.Profile = *tape.Cell[3].S
 	}
 	return
 }