77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
package pgproto3
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import (
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"encoding/binary"
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"encoding/json"
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"errors"
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"github.com/jackc/pgx/v5/internal/pgio"
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)
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// AuthenticationMD5Password is a message sent from the backend indicating that an MD5 hashed password is required.
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type AuthenticationMD5Password struct {
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Salt [4]byte
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}
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// Backend identifies this message as sendable by the PostgreSQL backend.
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func (*AuthenticationMD5Password) Backend() {}
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// Backend identifies this message as an authentication response.
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func (*AuthenticationMD5Password) AuthenticationResponse() {}
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// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
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// type identifier and 4 byte message length.
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func (dst *AuthenticationMD5Password) Decode(src []byte) error {
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if len(src) != 8 {
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return errors.New("bad authentication message size")
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}
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authType := binary.BigEndian.Uint32(src)
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if authType != AuthTypeMD5Password {
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return errors.New("bad auth type")
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}
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copy(dst.Salt[:], src[4:8])
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return nil
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}
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// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
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func (src *AuthenticationMD5Password) Encode(dst []byte) ([]byte, error) {
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dst, sp := beginMessage(dst, 'R')
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dst = pgio.AppendUint32(dst, AuthTypeMD5Password)
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dst = append(dst, src.Salt[:]...)
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return finishMessage(dst, sp)
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}
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// MarshalJSON implements encoding/json.Marshaler.
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func (src AuthenticationMD5Password) MarshalJSON() ([]byte, error) {
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return json.Marshal(struct {
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Type string
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Salt [4]byte
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}{
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Type: "AuthenticationMD5Password",
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Salt: src.Salt,
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})
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}
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// UnmarshalJSON implements encoding/json.Unmarshaler.
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func (dst *AuthenticationMD5Password) UnmarshalJSON(data []byte) error {
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// Ignore null, like in the main JSON package.
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if string(data) == "null" {
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return nil
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}
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var msg struct {
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Type string
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Salt [4]byte
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}
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if err := json.Unmarshal(data, &msg); err != nil {
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return err
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}
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dst.Salt = msg.Salt
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return nil
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}
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