Feature: Include message attachment checksums (MD5, SHA1 & SHA254) in API message summary

internal/storage/messages.go

@@ -3,6 +3,9 @@ package storage
 import (
 	"bytes"
 	"context"
+	"crypto/md5"  // #nosec
+	"crypto/sha1" // #nosec
+	"crypto/sha256"
 	"database/sql"
 	"encoding/base64"
 	"encoding/hex"
@@ -505,6 +508,14 @@ func AttachmentSummary(a *enmime.Part) Attachment {
 	o.ContentID = a.ContentID
 	o.Size = uint64(len(a.Content))
 
+	md5Hash := md5.Sum(a.Content)   // #nosec
+	sha1Hash := sha1.Sum(a.Content) // #nosec
+	sha256Hash := sha256.Sum256(a.Content)
+
+	o.Checksums.MD5 = hex.EncodeToString(md5Hash[:])
+	o.Checksums.SHA1 = hex.EncodeToString(sha1Hash[:])
+	o.Checksums.SHA256 = hex.EncodeToString(sha256Hash[:])
+
 	return o
 }
 

internal/storage/structs.go

@@ -48,7 +48,7 @@ type Message struct {
 	Attachments []Attachment
 }
 
-// Attachment struct for inline and attachments
+// Attachment struct for inline images and attachments
 //
 // swagger:model Attachment
 type Attachment struct {
@@ -62,6 +62,15 @@ type Attachment struct {
 	ContentID string
 	// Size in bytes
 	Size uint64
+	// File checksums
+	Checksums struct {
+		// MD5 checksum hash of file
+		MD5 string
+		// SHA1 checksum hash of file
+		SHA1 string
+		// SHA256 checksum hash of file
+		SHA256 string
+	}
 }
 
 // MessageSummary struct for frontend messages

server/ui/api/v1/swagger.json

@@ -1345,9 +1345,27 @@
       "x-go-package": "github.com/axllent/mailpit/internal/stats"
     },
     "Attachment": {
-      "description": "Attachment struct for inline and attachments",
+      "description": "Attachment struct for inline images and attachments",
       "type": "object",
       "properties": {
+        "Checksums": {
+          "description": "File checksums",
+          "type": "object",
+          "properties": {
+            "MD5": {
+              "description": "MD5 checksum hash of file",
+              "type": "string"
+            },
+            "SHA1": {
+              "description": "SHA1 checksum hash of file",
+              "type": "string"
+            },
+            "SHA256": {
+              "description": "SHA256 checksum hash of file",
+              "type": "string"
+            }
+          }
+        },
         "ContentID": {
           "description": "Content ID",
           "type": "string"