smime

Documentation

Overview

Package smime unwraps opaque S/MIME messages (application/pkcs7-mime). Graph delivers such mail as an empty body plus one smime.p7m attachment; for signedData the actual message sits inside the CMS structure and can be extracted client-side (without verifying the signature). envelopedData is genuinely encrypted and cannot be read via the API.

Index

• func IsPKCS7Attachment(name, contentType string) bool
• type Part
• type Result
  • func Unwrap(blob []byte) (*Result, error)

Functions

func IsPKCS7Attachment

func IsPKCS7Attachment(name, contentType string) bool

IsPKCS7Attachment reports whether an attachment looks like an opaque S/MIME container.

Types

type Part

type Part struct {
	Name        string
	ContentType string
	Data        []byte
}

Part is a file extracted from the inner MIME message.

type Result

type Result struct {
	Encrypted bool   // envelopedData: content not readable via API
	Body      string // extracted body text (plain preferred, HTML fallback)
	Parts     []Part // inner attachments
}

Result of unwrapping a pkcs7-mime blob.

func Unwrap

func Unwrap(blob []byte) (*Result, error)

Unwrap parses a CMS blob. Encrypted content is reported, signed content is unwrapped into body text and inner attachments. The signature is NOT verified - callers must present the result as unverified.