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/*
Hockeypuck - OpenPGP key server
Copyright (C) 2012-2014 Casey Marshall
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, version 3.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package openpgp
import (
_ "crypto/md5"
_ "crypto/sha1"
_ "crypto/sha256"
_ "crypto/sha512"
"database/sql"
_ "code.google.com/p/go.crypto/md4"
_ "code.google.com/p/go.crypto/ripemd160"
)
type resolver struct {
Pubkey *Pubkey
}
func (s *Settings) VerifySigs() bool {
return s.GetBool("hockeypuck.openpgp.verifySigs")
}
// Resolve resolves and connects relationship references
// between the different packet records in the key material.
func Resolve(pubkey *Pubkey) {
r := &resolver{pubkey}
var signable Signable
scopedPackets := make(map[string]bool)
pubkey.Visit(func(rec PacketRecord) error {
switch p := rec.(type) {
case *Pubkey:
r.setSigScope(p.RFingerprint, p.signatures...)
p.linkSelfSigs()
signable = p
case *UserId:
p.ScopedDigest = p.calcScopedDigest(r.Pubkey)
if _, has := scopedPackets[p.ScopedDigest]; has {
r.Pubkey.userIds = removeUserId(r.Pubkey.userIds, p)
r.Pubkey.Unsupported = append(r.Pubkey.Unsupported, p.Packet...)
r.Pubkey.Unsupported = append(r.Pubkey.Unsupported, concatSigPackets(p.signatures)...)
p.signatures = nil
} else {
scopedPackets[p.ScopedDigest] = true
r.setSigScope(p.ScopedDigest, p.signatures...)
p.linkSelfSigs(r.Pubkey)
signable = p
// linkSelfSigs needs to set creation & expiration
}
case *UserAttribute:
p.ScopedDigest = p.calcScopedDigest(r.Pubkey)
if _, has := scopedPackets[p.ScopedDigest]; has {
r.Pubkey.userAttributes = removeUserAttribute(r.Pubkey.userAttributes, p)
r.Pubkey.Unsupported = append(r.Pubkey.Unsupported, p.Packet...)
r.Pubkey.Unsupported = append(r.Pubkey.Unsupported, concatSigPackets(p.signatures)...)
p.signatures = nil
} else {
scopedPackets[p.ScopedDigest] = true
r.setSigScope(p.ScopedDigest, p.signatures...)
p.linkSelfSigs(r.Pubkey)
signable = p
// linkSelfSigs needs to set creation & expiration
}
case *Subkey:
r.setSigScope(p.RFingerprint, p.signatures...)
p.linkSelfSigs(r.Pubkey)
signable = p
case *Signature:
if _, has := scopedPackets[p.ScopedDigest]; has {
signable.RemoveSignature(p)
r.Pubkey.Unsupported = append(r.Pubkey.Unsupported, p.Packet...)
} else {
scopedPackets[p.ScopedDigest] = true
}
}
return nil
})
Sort(pubkey)
// Designate first UID / UAT as primary
if len(pubkey.userIds) > 0 {
pubkey.primaryUid = pubkey.userIds[0]
pubkey.primaryUidSig = pubkey.primaryUid.selfSignature
pubkey.PrimaryUid = sql.NullString{pubkey.primaryUid.ScopedDigest, true}
} else {
pubkey.primaryUid = nil
pubkey.primaryUidSig = nil
pubkey.PrimaryUid = sql.NullString{"", false}
}
if len(pubkey.userAttributes) > 0 {
pubkey.primaryUat = pubkey.userAttributes[0]
pubkey.primaryUatSig = pubkey.primaryUat.selfSignature
pubkey.PrimaryUat = sql.NullString{pubkey.primaryUat.ScopedDigest, true}
} else {
pubkey.primaryUat = nil
pubkey.primaryUatSig = nil
pubkey.PrimaryUat = sql.NullString{"", false}
}
}
func (r *resolver) setSigScope(scope string, sigs ...*Signature) {
for _, sig := range sigs {
sig.ScopedDigest = sig.calcScopedDigest(r.Pubkey, scope)
}
}
func removeUserId(uids []*UserId, removeUid *UserId) (result []*UserId) {
for _, uid := range uids {
if removeUid != uid {
result = append(result, uid)
}
}
return
}
func removeUserAttribute(uats []*UserAttribute, removeUat *UserAttribute) (result []*UserAttribute) {
for _, uat := range uats {
if removeUat != uat {
result = append(result, uat)
}
}
return
}
func removeSignature(sigs []*Signature, removeSig *Signature) (result []*Signature) {
for _, sig := range sigs {
if removeSig != sig {
result = append(result, sig)
}
}
return
}
func concatSigPackets(sigs []*Signature) (result []byte) {
for _, sig := range sigs {
result = append(result, sig.Packet...)
}
return
}
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