mirror of
https://github.com/go-i2p/go-i2p.git
synced 2025-07-04 13:32:52 -04:00
5d043d79e7
* add initial ed25519 (not done) * fix common.Certificate compile error * add more functions to crypto.SigningPrivateKey interface, not everyone implements them yet
97 lines
1.9 KiB
Go
97 lines
1.9 KiB
Go
package common
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import (
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"encoding/binary"
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"github.com/bounce-chat/go-i2p/lib/crypto"
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)
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const (
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CERT_NULL = iota
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CERT_HASHCASH
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CERT_HIDDEN
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CERT_SIGNED
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CERT_MULTIPLE
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CERT_KEY
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)
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const (
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KEYCERT_SIGN_DSA_SHA1 = iota
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KEYCERT_SIGN_P256
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KEYCERT_SIGN_P384
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KEYCERT_SIGN_P521
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KEYCERT_SIGN_RSA2048
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KEYCERT_SIGN_RSA3072
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KEYCERT_SIGN_RSA4096
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KEYCERT_SIGN_ED25519
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)
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const (
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KEYCERT_CRYPTO_ELG = iota
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)
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// used to append data to existing data structures
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type Certificate []byte
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// return the type of this certificate
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func (c Certificate) Type() byte {
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return c[0]
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}
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// get the length of the data in this certificate
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// return -1 if the size of the certificate is invalid
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func (c Certificate) Len() int {
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if len(c) <= 2 {
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// invalid size
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return -1
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}
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return int(binary.BigEndian.Uint16(c[1:3]))
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}
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// get the data for this certificate or null if none exists
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func (c Certificate) Data() (d []byte) {
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l := c.Len()
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if l > 0 && len(c) <= 3+l {
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d = c[3 : 3+l]
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}
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return
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}
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// a Certificate of type KEY
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type KeyCert []byte
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func (c KeyCert) Type() byte {
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return Certificate(c).Type()
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}
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func (c KeyCert) Data() []byte {
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return Certificate(c).Data()
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}
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// get the signing public key from this key cert
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func (c KeyCert) SigningPublicKey() (k crypto.SigningPublicKey) {
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data := c.Data()
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ktype := binary.BigEndian.Uint16(data[:2])
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// set data to be the key data now
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data = data[4:]
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// determine the key type
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if ktype == KEYCERT_SIGN_DSA_SHA1 {
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var pk crypto.DSAPublicKey
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copy(pk[:], data[:pk.Len()])
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k = pk
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} else if ktype == KEYCERT_SIGN_P256 {
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var pk crypto.ECP256PublicKey
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copy(pk[:], data[:pk.Len()])
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k = pk
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} else if ktype == KEYCERT_SIGN_P384 {
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var pk crypto.ECP384PublicKey
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copy(pk[:], data[:pk.Len()])
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k = pk
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} else if ktype == KEYCERT_SIGN_P521 {
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var pk crypto.ECP521PublicKey
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copy(pk[:], data[:pk.Len()])
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k = pk
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}
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// TODO: rsa/eddsa
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return
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}
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