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keys: add Cmp method to PublicKey

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It can be used by code that doesn't operate with PublicKeys, but still needs
to be able to compare keys for some purposes.
This commit is contained in:
Roman Khimov 2020-02-12 18:08:33 +03:00
parent 38d0efc96c
commit 32a064aa31
1 changed files with 10 additions and 11 deletions
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21
pkg/crypto/keys/publickey.go
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@ -22,17 +22,7 @@ type PublicKeys []*PublicKey
func (keys PublicKeys) Len() int { return len(keys) } func (keys PublicKeys) Len() int { return len(keys) }
func (keys PublicKeys) Swap(i, j int) { keys[i], keys[j] = keys[j], keys[i] } func (keys PublicKeys) Swap(i, j int) { keys[i], keys[j] = keys[j], keys[i] }
func (keys PublicKeys) Less(i, j int) bool { func (keys PublicKeys) Less(i, j int) bool {
if keys[i].X.Cmp(keys[j].X) == -1 { return keys[i].Cmp(keys[j]) == -1
return true
}
if keys[i].X.Cmp(keys[j].X) == 1 {
return false
}
if keys[i].X.Cmp(keys[j].X) == 0 {
return false
}
return keys[i].Y.Cmp(keys[j].Y) == -1
} }
// DecodeBytes decodes a PublicKeys from the given slice of bytes. // DecodeBytes decodes a PublicKeys from the given slice of bytes.
@ -75,6 +65,15 @@ func (p *PublicKey) Equal(key *PublicKey) bool {
return p.X.Cmp(key.X) == 0 && p.Y.Cmp(key.Y) == 0 return p.X.Cmp(key.X) == 0 && p.Y.Cmp(key.Y) == 0
} }
// Cmp compares two keys.
func (p *PublicKey) Cmp(key *PublicKey) int {
xCmp := p.X.Cmp(key.X)
if xCmp != 0 {
return xCmp
}
return p.Y.Cmp(key.Y)
}
// NewPublicKeyFromString returns a public key created from the // NewPublicKeyFromString returns a public key created from the
// given hex string. // given hex string.
func NewPublicKeyFromString(s string) (*PublicKey, error) { func NewPublicKeyFromString(s string) (*PublicKey, error) {