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Winni Neessen
b69ad27de3
Enhanced the documentation by adding detailed comments for each SMTP authentication type, specifying their references to RFC documents. Corrected comments for error variables to match the corresponding authentication schemas.
74 lines
3.5 KiB
Go
74 lines
3.5 KiB
Go
// SPDX-FileCopyrightText: 2022-2023 The go-mail Authors
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//
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// SPDX-License-Identifier: MIT
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package mail
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import "errors"
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// SMTPAuthType represents a string to any SMTP AUTH type
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type SMTPAuthType string
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// Supported SMTP AUTH types
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const (
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// SMTPAuthCramMD5 is the "CRAM-MD5" SASL authentication mechanism as described in RFC 4954
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SMTPAuthCramMD5 SMTPAuthType = "CRAM-MD5"
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// SMTPAuthLogin is the "LOGIN" SASL authentication mechanism
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SMTPAuthLogin SMTPAuthType = "LOGIN"
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// SMTPAuthNoAuth is equivalent to performing no authentication at all. It is a convenience
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// option and should not be used. Instead, for mail servers that do no support/require
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// authentication, the Client should not be used with the WithSMTPAuth option
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SMTPAuthNoAuth SMTPAuthType = ""
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// SMTPAuthPlain is the "PLAIN" authentication mechanism as described in RFC 4616
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SMTPAuthPlain SMTPAuthType = "PLAIN"
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// SMTPAuthXOAUTH2 is the "XOAUTH2" SASL authentication mechanism.
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// https://developers.google.com/gmail/imap/xoauth2-protocol
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SMTPAuthXOAUTH2 SMTPAuthType = "XOAUTH2"
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// SMTPAuthSCRAMSHA1 represents the SCRAM-SHA-1 SMTP authentication mechanism
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// https://datatracker.ietf.org/doc/html/rfc5802
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SMTPAuthSCRAMSHA1 SMTPAuthType = "SCRAM-SHA-1"
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// SMTPAuthSCRAMSHA1PLUS represents the "SCRAM-SHA-1-PLUS" authentication mechanism for SMTP.
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// https://datatracker.ietf.org/doc/html/rfc5802
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SMTPAuthSCRAMSHA1PLUS SMTPAuthType = "SCRAM-SHA-1-PLUS"
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// SMTPAuthSCRAMSHA256 represents the SCRAM-SHA-256 authentication mechanism for SMTP.
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// https://datatracker.ietf.org/doc/html/rfc7677
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SMTPAuthSCRAMSHA256 SMTPAuthType = "SCRAM-SHA-256"
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// SMTPAuthSCRAMSHA256PLUS represents the "SCRAM-SHA-256-PLUS" SMTP AUTH type.
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// https://datatracker.ietf.org/doc/html/rfc7677
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SMTPAuthSCRAMSHA256PLUS SMTPAuthType = "SCRAM-SHA-256-PLUS"
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)
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// SMTP Auth related static errors
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var (
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// ErrPlainAuthNotSupported should be used if the target server does not support the "PLAIN" schema
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ErrPlainAuthNotSupported = errors.New("server does not support SMTP AUTH type: PLAIN")
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// ErrLoginAuthNotSupported should be used if the target server does not support the "LOGIN" schema
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ErrLoginAuthNotSupported = errors.New("server does not support SMTP AUTH type: LOGIN")
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// ErrCramMD5AuthNotSupported should be used if the target server does not support the "CRAM-MD5" schema
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ErrCramMD5AuthNotSupported = errors.New("server does not support SMTP AUTH type: CRAM-MD5")
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// ErrXOauth2AuthNotSupported should be used if the target server does not support the "XOAUTH2" schema
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ErrXOauth2AuthNotSupported = errors.New("server does not support SMTP AUTH type: XOAUTH2")
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// ErrSCRAMSHA1AuthNotSupported should be used if the target server does not support the "SCRAM-SHA-1" schema
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ErrSCRAMSHA1AuthNotSupported = errors.New("server does not support SMTP AUTH type: SCRAM-SHA-1")
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// ErrSCRAMSHA1PLUSAuthNotSupported should be used if the target server does not support the "SCRAM-SHA-1-PLUS" schema
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ErrSCRAMSHA1PLUSAuthNotSupported = errors.New("server does not support SMTP AUTH type: SCRAM-SHA-1-PLUS")
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// ErrSCRAMSHA256AuthNotSupported should be used if the target server does not support the "SCRAM-SHA-256" schema
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ErrSCRAMSHA256AuthNotSupported = errors.New("server does not support SMTP AUTH type: SCRAM-SHA-256")
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// ErrSCRAMSHA256PLUSAuthNotSupported should be used if the target server does not support the "SCRAM-SHA-256-PLUS" schema
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ErrSCRAMSHA256PLUSAuthNotSupported = errors.New("server does not support SMTP AUTH type: SCRAM-SHA-256-PLUS")
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)
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