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Improve TLS state handling and add SCRAM-SHA-256 auth support

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Replaced direct TLSConnectionState call with error handling for TLS state retrieval. Introduced SCRAM-SHA-256 support in the SMTP authentication process.
This commit is contained in:
Winni Neessen 2024-10-01 15:28:10 +02:00
parent 3013975c6a
commit 27838f5b1f
Signed by: wneessen
GPG key ID: 385AC9889632126E
1 changed files with 10 additions and 7 deletions
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17
client.go
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@ -748,7 +748,11 @@ func (c *Client) tls() error {
return err
}
}
_, c.isEncrypted = c.smtpClient.TLSConnectionState()
tlsConnState, err := c.smtpClient.GetTLSConnectionState()
if err != nil {
return fmt.Errorf("failed to get TLS connection state: %w", err)
}
c.isEncrypted = tlsConnState.HandshakeComplete
}
return nil
}
@ -790,6 +794,11 @@ func (c *Client) auth() error {
return ErrXOauth2AuthNotSupported
}
c.smtpAuth = smtp.ScramSHA1Auth(c.user, c.pass)
case SMTPAuthSCRAMSHA256:
if !strings.Contains(smtpAuthType, string(SMTPAuthSCRAMSHA256)) {
return ErrXOauth2AuthNotSupported
}
c.smtpAuth = smtp.ScramSHA256Auth(c.user, c.pass)
case SMTPAuthSCRAMSHA1PLUS:
if !strings.Contains(smtpAuthType, string(SMTPAuthSCRAMSHA1PLUS)) {
return ErrXOauth2AuthNotSupported
@ -799,11 +808,6 @@ func (c *Client) auth() error {
return err
}
c.smtpAuth = smtp.ScramSHA1PlusAuth(c.user, c.pass, tlsConnState)
case SMTPAuthSCRAMSHA256:
if !strings.Contains(smtpAuthType, string(SMTPAuthSCRAMSHA256)) {
return ErrXOauth2AuthNotSupported
}
c.smtpAuth = smtp.ScramSHA256Auth(c.user, c.pass)
case SMTPAuthSCRAMSHA256PLUS:
if !strings.Contains(smtpAuthType, string(SMTPAuthSCRAMSHA256PLUS)) {
return ErrXOauth2AuthNotSupported
@ -813,7 +817,6 @@ func (c *Client) auth() error {
return err
}
c.smtpAuth = smtp.ScramSHA256PlusAuth(c.user, c.pass, tlsConnState)
default:
return fmt.Errorf("unsupported SMTP AUTH type %q", c.smtpAuthType)
}