diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..c6e0d5d --- /dev/null +++ b/.gitignore @@ -0,0 +1,30 @@ + +# Created by https://www.gitignore.io/api/go,visualstudiocode + +### Go ### +# Binaries for programs and plugins +*.exe +*.exe~ +*.dll +*.so +*.dylib + +# Test binary, build with `go test -c` +*.test + +# Output of the go coverage tool, specifically when used with LiteIDE +*.out + +### Go Patch ### +/vendor/ +/Godeps/ + +### VisualStudioCode ### +.vscode/* +!.vscode/settings.json +!.vscode/tasks.json +!.vscode/launch.json +!.vscode/extensions.json + + +# End of https://www.gitignore.io/api/go,visualstudiocode \ No newline at end of file diff --git a/ActivityPub/activity.go b/ActivityPub/activity.go new file mode 100644 index 0000000..da90435 --- /dev/null +++ b/ActivityPub/activity.go @@ -0,0 +1,138 @@ +package activitypub + +import ( + "bytes" + "crypto/rsa" + "crypto/sha256" + "encoding/base64" + "encoding/json" + "errors" + "fmt" + "io/ioutil" + "net/http" + "net/url" + "os" + "time" + + "github.com/Songmu/go-httpdate" + "github.com/yukimochi/Activity-Relay/KeyLoader" + "github.com/yukimochi/httpsig" +) + +var UA_STRING = "YUKIMOCHI Toot Relay Service (golang net/http; Activity-Relay v0.0.1; " + os.Getenv("RELAY_DOMAIN") + ")" + +func appendSignature(r *http.Request, body *[]byte, KeyID string, pKey *rsa.PrivateKey) error { + hash := sha256.New() + hash.Write(*body) + b := hash.Sum(nil) + r.Header.Set("Digest", "SHA-256="+base64.StdEncoding.EncodeToString(b)) + r.Header.Set("Host", r.Host) + + signer, _, err := httpsig.NewSigner([]httpsig.Algorithm{httpsig.RSA_SHA256}, []string{httpsig.RequestTarget, "Host", "Date", "Digest", "Content-Type"}, httpsig.Signature) + if err != nil { + return err + } + err = signer.SignRequest(pKey, KeyID, r) + if err != nil { + return err + } + return nil +} + +// SendActivity : Send ActivityPub Activity. +func SendActivity(inboxURL string, KeyID string, refBytes []byte, pKey *rsa.PrivateKey) error { + req, _ := http.NewRequest("POST", inboxURL, bytes.NewBuffer(refBytes)) + req.Header.Set("Content-Type", "application/activity+json, application/ld+json") + req.Header.Set("User-Agent", UA_STRING) + req.Header.Set("Date", httpdate.Time2Str(time.Now())) + appendSignature(req, &refBytes, KeyID, pKey) + client := &http.Client{Timeout: time.Duration(5) * time.Second} + resp, err := client.Do(req) + if err != nil { + return err + } + + fmt.Println(inboxURL, resp.StatusCode) + if resp.StatusCode/100 != 2 { + return errors.New(resp.Status) + } + + return nil +} + +// RetrieveActor : Retrieve Remote actor +func RetrieveActor(url string) (*Actor, error) { + req, _ := http.NewRequest("GET", url, nil) + req.Header.Set("Accept", "application/activity+json, application/ld+json") + req.Header.Set("User-Agent", UA_STRING) + client := new(http.Client) + resp, err := client.Do(req) + if err != nil { + return nil, err + } + defer resp.Body.Close() + + data, _ := ioutil.ReadAll(resp.Body) + var actor Actor + err = json.Unmarshal(data, &actor) + if err != nil { + return nil, err + } + return &actor, nil +} + +// DescribeNestedActivity : Descrive Nested Activity Series +func DescribeNestedActivity(nestedActivity interface{}) (*Activity, error) { + mappedObject := nestedActivity.(map[string]interface{}) + + return &Activity{ + ID: mappedObject["id"].(string), + Type: mappedObject["type"].(string), + Actor: mappedObject["actor"].(string), + Object: mappedObject["object"], + }, nil +} + +// GenerateActor : Generate Actor by hostname and publickey +func GenerateActor(hostname *url.URL, publickey *rsa.PublicKey) Actor { + return Actor{ + []string{"https://www.w3.org/ns/activitystreams", "https://w3id.org/security/v1"}, + hostname.String() + "/actor", + "Service", + "relay", + hostname.String() + "/inbox", + nil, + PublicKey{ + hostname.String() + "/actor#main-key", + hostname.String() + "/actor", + keyloader.GeneratePublicKeyPEMString(publickey), + }, + } +} + +// GenerateWebfingerResource : Generate Webfinger Resource +func GenerateWebfingerResource(hostname *url.URL, actor *Actor) WebfingerResource { + return WebfingerResource{ + "acct:" + actor.PreferredUsername + "@" + hostname.Host, + []WebfingerLink{ + WebfingerLink{ + "self", + "application/activity+json", + actor.ID, + }, + }, + } +} + +// GenerateActivityResponse : Generate Responce Activity to Activity +func GenerateActivityResponse(host *url.URL, to *url.URL, responseType string, activity Activity) Activity { + return Activity{ + []string{"https://www.w3.org/ns/activitystreams", "https://w3id.org/security/v1"}, + host.String() + "/actor#accepts/follows/" + to.Host, + host.String() + "/actor", + responseType, + &activity, + nil, + nil, + } +} diff --git a/ActivityPub/models.go b/ActivityPub/models.go new file mode 100644 index 0000000..8a72527 --- /dev/null +++ b/ActivityPub/models.go @@ -0,0 +1,55 @@ +package activitypub + +// PublicKey : Activity Certificate. +type PublicKey struct { + ID string `json:"id"` + Owner string `json:"owner"` + PublicKeyPem string `json:"publicKeyPem"` +} + +type endpoints struct { + SharedInbox string `json:"sharedInbox"` +} + +// Actor : ActivityPub Actor. +type Actor struct { + Context interface{} `json:"@context"` + ID string `json:"id"` + Type string `json:"type"` + PreferredUsername string `json:"preferredUsername"` + Inbox string `json:"inbox"` + Endpoints *endpoints `json:"endpoints"` + PublicKey PublicKey `json:"publicKey"` +} + +// Activity : ActivityPub Activity. +type Activity struct { + Context interface{} `json:"@context"` + ID string `json:"id"` + Actor string `json:"actor"` + Type string `json:"type"` + Object interface{} `json:"object"` + To []string `json:"to"` + Cc []string `json:"cc"` +} + +// Signature : ActivityPub Header Signature. +type Signature struct { + Type string `json:"type"` + Creator string `json:"creator"` + Created string `json:"created"` + SignatureValue string `json:"signatureValue"` +} + +// WebfingerResource : Webfinger Resource. +type WebfingerResource struct { + Subject string `json:"subject"` + Links []WebfingerLink `json:"links"` +} + +// WebfingerLink : Webfinger Link Resource. +type WebfingerLink struct { + Rel string `json:"rel"` + Type string `json:"type"` + Href string `json:"href"` +} diff --git a/Gopkg.lock b/Gopkg.lock new file mode 100644 index 0000000..d01e600 --- /dev/null +++ b/Gopkg.lock @@ -0,0 +1,475 @@ +# This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'. + + +[[projects]] + digest = "1:ae0d66236b2b04b4ce4d2006b3f60bf802a724541b095bdb3fe3828200d58c5d" + name = "cloud.google.com/go" + packages = [ + "compute/metadata", + "iam", + "internal/optional", + "internal/version", + "pubsub", + "pubsub/apiv1", + "pubsub/internal/distribution", + ] + pruneopts = "UT" + revision = "1fd54cf41e6e0e178ffe3c52b0e2260281f603e3" + version = "v0.32.0" + +[[projects]] + branch = "master" + digest = 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= "github.com/RichardKnop/redsync" + packages = ["."] + pruneopts = "UT" + revision = "54b27db64c180751e7049321a2e109ff220ccdcc" + version = "v1.2.0" + +[[projects]] + digest = "1:0563c116613ceae09bdb369707e66792782456793a592099e30a1a8981b563bd" + name = "github.com/Songmu/go-httpdate" + packages = ["."] + pruneopts = "UT" + revision = "f3edac06fa8e34565c7dbb4a35c7084db427498e" + version = "v1.0.0" + +[[projects]] + digest = "1:3ffdd3ae7c631df4637d15732c0d3e71ee3a44ebc0ea961e6d2931ef02880439" + name = "github.com/aws/aws-sdk-go" + packages = [ + "aws", + "aws/awserr", + "aws/awsutil", + "aws/client", + "aws/client/metadata", + "aws/corehandlers", + "aws/credentials", + "aws/credentials/ec2rolecreds", + "aws/credentials/endpointcreds", + "aws/credentials/stscreds", + "aws/csm", + "aws/defaults", + "aws/ec2metadata", + "aws/endpoints", + "aws/request", + "aws/session", + "aws/signer/v4", + "internal/ini", + "internal/sdkio", + "internal/sdkrand", + "internal/sdkuri", + "internal/shareddefaults", + "private/protocol", + "private/protocol/json/jsonutil", + "private/protocol/jsonrpc", + "private/protocol/query", + "private/protocol/query/queryutil", + "private/protocol/rest", + "private/protocol/xml/xmlutil", + "service/dynamodb", + "service/dynamodb/dynamodbattribute", + "service/dynamodb/dynamodbiface", + "service/sqs", + "service/sqs/sqsiface", + "service/sts", + ] + pruneopts = "UT" + revision = "fa9217848bf00ff03c3c097e9c109cbe833ea130" + version = "v1.15.69" + +[[projects]] + branch = "master" + digest = "1:f98385a9b77f6cacae716a59c04e6ac374d101466d4369c4e8cc706a39c4bb2e" + name = "github.com/bradfitz/gomemcache" + packages = ["memcache"] + pruneopts = "UT" + revision = "bc664df9673713a0ccf26e3b55a673ec7301088b" + +[[projects]] + digest = "1:34a9a60fade37f8009ed4a19e02924198aba3eabfcc120ee5c6002b7de17212d" + name = "github.com/go-redis/redis" + packages = [ + ".", + "internal", + "internal/consistenthash", + "internal/hashtag", + "internal/pool", + "internal/proto", + "internal/singleflight", + "internal/util", + ] + pruneopts = "UT" + revision = "b3d9bf10f6666b2ee5100a6f3f84f4caf3b4e37d" + version = "v6.14.2" + +[[projects]] + digest = "1:19e1717be26f549febea402e08b46db7919d164324a24ff67e0c81dfb11316b8" + name = "github.com/golang/protobuf" + packages = [ + "proto", + "protoc-gen-go/descriptor", + "ptypes", + "ptypes/any", + "ptypes/duration", + "ptypes/empty", + "ptypes/timestamp", + ] + pruneopts = "UT" + revision = "aa810b61a9c79d51363740d207bb46cf8e620ed5" + version = "v1.2.0" + +[[projects]] + digest = "1:38ec74012390146c45af1f92d46e5382b50531247929ff3a685d2b2be65155ac" + name = "github.com/gomodule/redigo" + packages = [ + "internal", + "redis", + ] + pruneopts = "UT" + revision = "9c11da706d9b7902c6da69c592f75637793fe121" + version = "v2.0.0" + +[[projects]] + digest = "1:3a26588bc48b96825977c1b3df964f8fd842cd6860cc26370588d3563433cf11" + name = "github.com/google/uuid" + packages = ["."] + pruneopts = "UT" + revision = 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"internal/tagencoding", + "plugin/ocgrpc", + "plugin/ochttp", + "plugin/ochttp/propagation/b3", + "stats", + "stats/internal", + "stats/view", + "tag", + "trace", + "trace/internal", + "trace/propagation", + "trace/tracestate", + ] + pruneopts = "UT" + revision = "b7bf3cdb64150a8c8c53b769fdeb2ba581bd4d4b" + version = "v0.18.0" + +[[projects]] + branch = "master" + digest = "1:b87380c6e35fd509a0d18fa5319b5ec875ba462d3b43bf2d1c232a64a9d75c33" + name = "golang.org/x/crypto" + packages = [ + "blake2b", + "blake2s", + "ripemd160", + "sha3", + ] + pruneopts = "UT" + revision = "4d3f4d9ffa16a13f451c3b2999e9c49e9750bf06" + +[[projects]] + branch = "master" + digest = "1:cb50171ec1782317a86709fce896e4f564a35ceece954561288afa5948cf5856" + name = "golang.org/x/net" + packages = [ + "context", + "context/ctxhttp", + "http/httpguts", + "http2", + "http2/hpack", + "idna", + "internal/timeseries", + "trace", + ] + pruneopts = "UT" + revision = "10aee181995363b41f712a55844a0dd52ea04646" + 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"internal/colltab", + "internal/gen", + "internal/tag", + "internal/triegen", + "internal/ucd", + "language", + "secure/bidirule", + "transform", + "unicode/bidi", + "unicode/cldr", + "unicode/norm", + "unicode/rangetable", + ] + pruneopts = "UT" + revision = "f21a4dfb5e38f5895301dc265a8def02365cc3d0" + version = "v0.3.0" + +[[projects]] + branch = "master" + digest = "1:915d0b9a1a51eb9e1598a420ed3ea1693bd46672d13afc7cb6d62dfd700f2f24" + name = "google.golang.org/api" + packages = [ + "googleapi/transport", + "internal", + "iterator", + "option", + "support/bundler", + "transport", + "transport/grpc", + "transport/http", + "transport/http/internal/propagation", + ] + pruneopts = "UT" + revision = "04bb50b6b83d0e72253821af8cf3252d8e866517" + +[[projects]] + digest = "1:b13819327be647014031c6a194299da87ca35313bfc01fdc1da7bd3ddf08cbce" + name = "google.golang.org/appengine" + packages = [ + ".", + "internal", + "internal/app_identity", + "internal/base", + "internal/datastore", + "internal/log", + "internal/modules", + "internal/remote_api", + "internal/socket", + "internal/urlfetch", + "socket", + "urlfetch", + ] + pruneopts = "UT" + revision = "4a4468ece617fc8205e99368fa2200e9d1fad421" + version = "v1.3.0" + +[[projects]] + branch = "master" + digest = "1:a27cead08481bf67712a240a18bbe8e0da035db2a59ce85b67142f6f9fb6a5c6" + name = "google.golang.org/genproto" + packages = [ + "googleapis/api/annotations", + "googleapis/iam/v1", + "googleapis/pubsub/v1", + "googleapis/rpc/status", + "protobuf/field_mask", + ] + pruneopts = "UT" + revision = "c830210a61dfaa790e1920f8d0470fc27bc2efbe" + +[[projects]] + digest = "1:1ac2802a1ffa70fe39243e22aab53dd3386396fc98de2417ff744d87b079e78c" + name = "google.golang.org/grpc" + packages = [ + ".", + "balancer", + "balancer/base", + "balancer/roundrobin", + "codes", + "connectivity", + "credentials", + "credentials/oauth", + "encoding", + "encoding/proto", + "grpclog", + "internal", + "internal/backoff", + "internal/channelz", + "internal/envconfig", + "internal/grpcrand", + "internal/transport", + "keepalive", + "metadata", + "naming", + "peer", + "resolver", + "resolver/dns", + "resolver/passthrough", + "stats", + "status", + "tap", + ] + pruneopts = "UT" + revision = "2e463a05d100327ca47ac218281906921038fd95" + version = "v1.16.0" + +[[projects]] + branch = "v2" + digest = "1:988de7520a09024d5d94cd99bd545afbf194893994ec759b1cda0a0bbb6adb80" + name = "gopkg.in/mgo.v2" + packages = [ + ".", + "bson", + "internal/json", + "internal/sasl", + "internal/scram", + ] + pruneopts = "UT" + revision = "9856a29383ce1c59f308dd1cf0363a79b5bef6b5" + +[[projects]] + digest = "1:342378ac4dcb378a5448dd723f0784ae519383532f5e70ade24132c4c8693202" + name = "gopkg.in/yaml.v2" + packages = ["."] + pruneopts = "UT" + revision = "5420a8b6744d3b0345ab293f6fcba19c978f1183" + version = "v2.2.1" + +[solve-meta] + analyzer-name = "dep" + analyzer-version = 1 + input-imports = [ + "github.com/RichardKnop/machinery/v1", + "github.com/RichardKnop/machinery/v1/config", + "github.com/RichardKnop/machinery/v1/tasks", + "github.com/Songmu/go-httpdate", + "github.com/go-redis/redis", + "github.com/satori/go.uuid", + "github.com/yukimochi/httpsig", + ] + solver-name = "gps-cdcl" + solver-version = 1 diff --git a/Gopkg.toml b/Gopkg.toml new file mode 100644 index 0000000..5c879c7 --- /dev/null +++ b/Gopkg.toml @@ -0,0 +1,3 @@ +[prune] + go-tests = true + unused-packages = true diff --git a/KeyLoader/keyloader.go b/KeyLoader/keyloader.go new file mode 100644 index 0000000..6231d4c --- /dev/null +++ b/KeyLoader/keyloader.go @@ -0,0 +1,46 @@ +package keyloader + +import ( + "crypto/rsa" + "crypto/x509" + "encoding/pem" + "fmt" + "io/ioutil" + "unsafe" +) + +func ReadPrivateKeyRSAfromPath(path string) (*rsa.PrivateKey, error) { + file, err := ioutil.ReadFile(path) + if err != nil { + return nil, err + } + decoded, _ := pem.Decode(file) + priv, err := x509.ParsePKCS1PrivateKey(decoded.Bytes) + if err != nil { + return nil, err + } + return priv, nil +} + +func ReadPublicKeyRSAfromString(pemString string) (*rsa.PublicKey, error) { + pemByte := *(*[]byte)(unsafe.Pointer(&pemString)) + decoded, _ := pem.Decode(pemByte) + keyInterface, err := x509.ParsePKIXPublicKey(decoded.Bytes) + if err != nil { + fmt.Println(err) + return nil, err + } + pub := keyInterface.(*rsa.PublicKey) + return pub, nil +} + +func GeneratePublicKeyPEMString(pub *rsa.PublicKey) string { + pubkeyBytes := x509.MarshalPKCS1PublicKey(pub) + pubkeyPem := pem.EncodeToMemory( + &pem.Block{ + Type: "RSA PUBLIC KEY", + Bytes: pubkeyBytes, + }, + ) + return string(pubkeyPem) +} diff --git a/LICENCE b/LICENCE new file mode 100644 index 0000000..2def0e8 --- /dev/null +++ b/LICENCE @@ -0,0 +1,661 @@ + GNU AFFERO GENERAL PUBLIC LICENSE + Version 3, 19 November 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU Affero General Public License is a free, copyleft license for +software and other kinds of works, specifically designed to ensure +cooperation with the community in the case of network server software. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. By contrast, +our General Public Licenses are intended to guarantee your freedom to +share and change all versions of a program--to make sure it remains free +software for all its users. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +them if you wish), that you receive source code or can get it if you +want it, that you can change the software or use pieces of it in new +free programs, and that you know you can do these things. + + Developers that use our General Public Licenses protect your rights +with two steps: (1) assert copyright on the software, and (2) offer +you this License which gives you legal permission to copy, distribute +and/or modify the software. + + A secondary benefit of defending all users' freedom is that +improvements made in alternate versions of the program, if they +receive widespread use, become available for other developers to +incorporate. Many developers of free software are heartened and +encouraged by the resulting cooperation. 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Remote Network Interaction; Use with the GNU General Public License. + + Notwithstanding any other provision of this License, if you modify the +Program, your modified version must prominently offer all users +interacting with it remotely through a computer network (if your version +supports such interaction) an opportunity to receive the Corresponding +Source of your version by providing access to the Corresponding Source +from a network server at no charge, through some standard or customary +means of facilitating copying of software. This Corresponding Source +shall include the Corresponding Source for any work covered by version 3 +of the GNU General Public License that is incorporated pursuant to the +following paragraph. + + Notwithstanding any other provision of this License, you have +permission to link or combine any covered work with a work licensed +under version 3 of the GNU General Public License into a single +combined work, and to convey the resulting work. 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If the Program does not specify a version number of the +GNU Affero General Public License, you may choose any version ever published +by the Free Software Foundation. + + If the Program specifies that a proxy can decide which future +versions of the GNU Affero General Public License can be used, that proxy's +public statement of acceptance of a version permanently authorizes you +to choose that version for the Program. + + Later license versions may give you additional or different +permissions. However, no additional obligations are imposed on any +author or copyright holder as a result of your choosing to follow a +later version. + + 15. Disclaimer of Warranty. + + THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY +APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT +HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY +OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, +THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM +IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF +ALL NECESSARY SERVICING, REPAIR OR CORRECTION. + + 16. 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Interpretation of Sections 15 and 16. + + If the disclaimer of warranty and limitation of liability provided +above cannot be given local legal effect according to their terms, +reviewing courts shall apply local law that most closely approximates +an absolute waiver of all civil liability in connection with the +Program, unless a warranty or assumption of liability accompanies a +copy of the Program in return for a fee. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +state the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU Affero General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Affero General Public License for more details. + + You should have received a copy of the GNU Affero General Public License + along with this program. If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If your software can interact with users remotely through a computer +network, you should also make sure that it provides a way for users to +get its source. For example, if your program is a web application, its +interface could display a "Source" link that leads users to an archive +of the code. There are many ways you could offer source, and different +solutions will be better for different programs; see section 13 for the +specific requirements. + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU AGPL, see +. \ No newline at end of file diff --git a/decode.go b/decode.go new file mode 100644 index 0000000..790be8d --- /dev/null +++ b/decode.go @@ -0,0 +1,56 @@ +package main + +import ( + "crypto/sha256" + "encoding/base64" + "encoding/json" + "errors" + "net/http" + "strconv" + + "github.com/yukimochi/Activity-Relay/ActivityPub" + "github.com/yukimochi/Activity-Relay/KeyLoader" + "github.com/yukimochi/httpsig" +) + +func decodeActivity(r *http.Request) (*activitypub.Activity, *activitypub.Actor, []byte, error) { + r.Header.Set("Host", r.Host) + dataLen, _ := strconv.Atoi(r.Header.Get("Content-Length")) + body := make([]byte, dataLen) + r.Body.Read(body) + + // Verify HTTPSignature + verifier, _ := httpsig.NewVerifier(r) + KeyID := verifier.KeyId() + remoteActor, err := activitypub.RetrieveActor(KeyID) + if err != nil { + return nil, nil, nil, err + } + PubKey, err := keyloader.ReadPublicKeyRSAfromString(remoteActor.PublicKey.PublicKeyPem) + if err != nil { + return nil, nil, nil, err + } + err = verifier.Verify(PubKey, httpsig.RSA_SHA256) + if err != nil { + return nil, nil, nil, err + } + + // Verify Digest + givenDigest := r.Header.Get("Digest") + hash := sha256.New() + hash.Write(body) + b := hash.Sum(nil) + calcurateDigest := "SHA-256=" + base64.StdEncoding.EncodeToString(b) + + if givenDigest != calcurateDigest { + return nil, nil, nil, errors.New("Digest header is mismatch") + } + + var activity activitypub.Activity + err = json.Unmarshal(body, &activity) + if err != nil { + return nil, nil, nil, err + } + + return &activity, remoteActor, body, nil +} diff --git a/docs/ayame.png b/docs/ayame.png new file mode 100644 index 0000000..2b7e075 Binary files /dev/null and b/docs/ayame.png differ diff --git a/handle.go b/handle.go new file mode 100644 index 0000000..699abb5 --- /dev/null +++ b/handle.go @@ -0,0 +1,236 @@ +package main + +import ( + "encoding/json" + "errors" + "fmt" + "net/http" + "net/url" + "strings" + "unsafe" + + "github.com/RichardKnop/machinery/v1/tasks" + "github.com/yukimochi/Activity-Relay/ActivityPub" +) + +func handleWebfinger(w http.ResponseWriter, r *http.Request) { + resource := r.URL.Query()["resource"] + if r.Method == "GET" && len(resource) == 0 { + w.WriteHeader(400) + w.Write(nil) + } else { + request := resource[0] + if request == WebfingerResource.Subject { + wfresource, err := json.Marshal(&WebfingerResource) + if err != nil { + panic(err) + } + w.Header().Add("Content-Type", "application/json") + w.WriteHeader(200) + w.Write(wfresource) + } else { + w.WriteHeader(404) + w.Write(nil) + } + } +} + +func handleActor(w http.ResponseWriter, r *http.Request) { + if r.Method == "GET" { + actor, err := json.Marshal(&Actor) + if err != nil { + panic(err) + } + w.Header().Add("Content-Type", "application/activity+json") + w.WriteHeader(200) + w.Write(actor) + } else { + w.WriteHeader(400) + w.Write(nil) + } +} + +func contains(entries interface{}, finder string) bool { + switch entry := entries.(type) { + case string: + return entry == finder + case []string: + for i := 0; i < len(entry); i++ { + if entry[i] == finder { + return true + } + } + return false + } + return false +} + +func pushRelayJob(sourceInbox string, body []byte) { + receivers, _ := RedClient.Keys("subscription:*").Result() + for _, receiver := range receivers { + if sourceInbox != strings.Replace(receiver, "subscription:", "", 1) { + inboxURL, _ := RedClient.HGet(receiver, "inbox_url").Result() + job := &tasks.Signature{ + Name: "relay", + RetryCount: 0, + Args: []tasks.Arg{ + { + Name: "inboxURL", + Type: "string", + Value: inboxURL, + }, + { + Name: "body", + Type: "string", + Value: *(*string)(unsafe.Pointer(&body)), + }, + }, + } + _, err := MacServer.SendTask(job) + if err != nil { + fmt.Println(err) + } + } + } +} + +func pushRegistorJob(inboxURL string, body []byte) { + job := &tasks.Signature{ + Name: "registor", + RetryCount: 25, + Args: []tasks.Arg{ + { + Name: "inboxURL", + Type: "string", + Value: inboxURL, + }, + { + Name: "body", + Type: "string", + Value: *(*string)(unsafe.Pointer(&body)), + }, + }, + } + _, err := MacServer.SendTask(job) + if err != nil { + fmt.Println(err) + } +} + +func followAcceptable(activity *activitypub.Activity, actor *activitypub.Actor) error { + if contains(activity.Object, "https://www.w3.org/ns/activitystreams#Public") { + return nil + } else { + return errors.New("Follow only allowed for https://www.w3.org/ns/activitystreams#Public") + } +} + +func suitableFollow(activity *activitypub.Activity, actor *activitypub.Actor) bool { + domain, _ := url.Parse(activity.Actor) + receivers, _ := RedClient.Exists("blocked_domain:" + domain.Host).Result() + if receivers != 0 { + return false + } + return true +} + +func relayAcceptable(activity *activitypub.Activity, actor *activitypub.Actor) error { + if !contains(activity.To, "https://www.w3.org/ns/activitystreams#Public") && !contains(activity.Cc, "https://www.w3.org/ns/activitystreams#Public") { + return errors.New("Activity should contain https://www.w3.org/ns/activitystreams#Public as receiver") + } + domain, _ := url.Parse(activity.Actor) + receivers, _ := RedClient.Exists("subscription:" + domain.Host).Result() + if receivers == 0 { + return errors.New("To use the relay service, Subscribe me in advance") + } + return nil +} + +func suitableRelay(activity *activitypub.Activity, actor *activitypub.Actor) bool { + domain, _ := url.Parse(activity.Actor) + receivers, _ := RedClient.Exists("limited_domain:" + domain.Host).Result() + if receivers != 0 { + return false + } + return true +} + +func handleInbox(w http.ResponseWriter, r *http.Request) { + switch r.Method { + case "POST": + activity, actor, body, err := decodeActivity(r) + if err != nil { + w.WriteHeader(400) + w.Write(nil) + } else { + switch activity.Type { + case "Follow": + err = followAcceptable(activity, actor) + if err != nil { + w.WriteHeader(400) + w.Write([]byte(err.Error())) + } else { + domain, _ := url.Parse(activity.Actor) + var responseType string + if suitableFollow(activity, actor) { + responseType = "Accept" + RedClient.HSet("subscription:"+domain.Host, "inbox_url", actor.Endpoints.SharedInbox) + } else { + responseType = "Reject" + } + resp := activitypub.GenerateActivityResponse(Hostname, domain, responseType, *activity) + jsonData, _ := json.Marshal(&resp) + go pushRegistorJob(actor.Inbox, jsonData) + + fmt.Println(responseType+" Follow Request : ", activity.Actor) + w.WriteHeader(202) + w.Write(nil) + } + case "Undo": + nestedActivity, _ := activitypub.DescribeNestedActivity(activity.Object) + if nestedActivity.Type == "Follow" && nestedActivity.Actor == activity.Actor { + domain, _ := url.Parse(activity.Actor) + RedClient.Del("subscription:" + domain.Host) + + fmt.Println("Accept Unfollow Request : ", activity.Actor) + w.WriteHeader(202) + w.Write(nil) + } else { + err = relayAcceptable(activity, actor) + if err != nil { + w.WriteHeader(400) + w.Write([]byte(err.Error())) + } else { + domain, _ := url.Parse(activity.Actor) + go pushRelayJob(domain.Host, body) + + fmt.Println("Accept Relay Status : ", activity.Actor) + w.WriteHeader(202) + w.Write(nil) + } + } + case "Create", "Update", "Delete", "Announce": + err = relayAcceptable(activity, actor) + if err != nil { + w.WriteHeader(400) + w.Write([]byte(err.Error())) + } else { + if suitableRelay(activity, actor) { + domain, _ := url.Parse(activity.Actor) + go pushRelayJob(domain.Host, body) + + fmt.Println("Accept Relay Status : ", activity.Actor) + } else { + fmt.Println("Skipping Relay Status : ", activity.Actor) + } + + w.WriteHeader(202) + w.Write(nil) + } + } + } + default: + w.WriteHeader(404) + w.Write(nil) + } +} diff --git a/main.go b/main.go new file mode 100644 index 0000000..751642d --- /dev/null +++ b/main.go @@ -0,0 +1,83 @@ +package main + +import ( + "crypto/rsa" + "fmt" + "net/http" + "net/url" + "os" + + "github.com/RichardKnop/machinery/v1" + "github.com/RichardKnop/machinery/v1/config" + "github.com/go-redis/redis" + "github.com/yukimochi/Activity-Relay/ActivityPub" + "github.com/yukimochi/Activity-Relay/KeyLoader" +) + +var Hostname *url.URL +var Hostkey *rsa.PrivateKey +var RedClient *redis.Client +var MacServer *machinery.Server + +// Actor : Relay's Actor +var Actor activitypub.Actor + +// WebfingerResource : Relay's Webfinger resource +var WebfingerResource activitypub.WebfingerResource + +func main() { + pemPath := os.Getenv("ACTOR_PEM") + if pemPath == "" { + panic("Require ACTOR_PEM environment variable.") + } + relayDomain := os.Getenv("RELAY_DOMAIN") + if relayDomain == "" { + panic("Require RELAY_DOMAIN environment variable.") + } + relayBind := os.Getenv("RELAY_BIND") + if relayBind == "" { + relayBind = "0.0.0.0:8080" + } + redisURL := os.Getenv("REDIS_URL") + if redisURL == "" { + redisURL = "127.0.0.1:6379" + } + + var err error + Hostkey, err = keyloader.ReadPrivateKeyRSAfromPath(pemPath) + if err != nil { + panic("Can't read Hostkey Pemfile") + } + Hostname, err = url.Parse("https://" + relayDomain) + if err != nil { + panic("Can't parse Relay Domain") + } + RedClient = redis.NewClient(&redis.Options{ + Addr: redisURL, + }) + + var macConfig = &config.Config{ + Broker: "redis://" + redisURL, + DefaultQueue: "relay", + ResultBackend: "redis://" + redisURL, + ResultsExpireIn: 5, + } + + MacServer, err = machinery.NewServer(macConfig) + if err != nil { + fmt.Println(err) + } + + Actor = activitypub.GenerateActor(Hostname, &Hostkey.PublicKey) + WebfingerResource = activitypub.GenerateWebfingerResource(Hostname, &Actor) + + http.HandleFunc("/.well-known/webfinger", handleWebfinger) + http.HandleFunc("/actor", handleActor) + http.HandleFunc("/inbox", handleInbox) + + fmt.Println("Welcome to YUKIMOCHI Activity-Relay [Server]\n - Configrations") + fmt.Println("RELAY DOMAIN : ", relayDomain) + fmt.Println("REDIS URL : ", redisURL) + fmt.Println("BIND ADDRESS : ", relayBind) + http.ListenAndServe(relayBind, nil) +} diff --git a/readme.md b/readme.md new file mode 100644 index 0000000..3838b39 --- /dev/null +++ b/readme.md @@ -0,0 +1,21 @@ +# Activity Relay Server + +## Yet another powerful customizable ActivityPub relay server written in Go. + +![Powered by Ayame](docs/ayame.png) + +## Packages + + - `github.com/yukimochi/Activity-Relay` + - `github.com/yukimochi/Activity-Relay/worker` + +## Requirements + + - [Redis](https://github.com/antirez/redis) + +## Environment Variable + + - `ACTOR_PEM` (ex. `/actor.pem`) + - `RELAY_DOMAIN` (ex. `relay.toot.yukimochi.jp`) + - `RELAY_BIND` (ex. `0.0.0.0:8080`) + - `REDIS_URL` (ex. `127.0.0.1:6379`) diff --git a/worker/worker.go b/worker/worker.go new file mode 100644 index 0000000..97e872e --- /dev/null +++ b/worker/worker.go @@ -0,0 +1,94 @@ +package main + +import ( + "crypto/rsa" + "fmt" + "net/url" + "os" + "unsafe" + + "github.com/RichardKnop/machinery/v1" + "github.com/RichardKnop/machinery/v1/config" + "github.com/satori/go.uuid" + "github.com/yukimochi/Activity-Relay/ActivityPub" + "github.com/yukimochi/Activity-Relay/KeyLoader" +) + +// Hostname : Hostname of Relay +var Hostname *url.URL + +// Hostkey : PrivateKey of Relay +var Hostkey *rsa.PrivateKey + +// Actor : Relay's Actor +var Actor activitypub.Actor + +func relayActivity(args ...string) error { + inboxURL := args[0] + body := args[1] + err := activitypub.SendActivity(inboxURL, Actor.ID, *(*[]byte)(unsafe.Pointer(&body)), Hostkey) + return err +} + +func registorActivity(args ...string) error { + inboxURL := args[0] + body := args[1] + err := activitypub.SendActivity(inboxURL, Actor.ID, *(*[]byte)(unsafe.Pointer(&body)), Hostkey) + return err +} + +func main() { + pemPath := os.Getenv("ACTOR_PEM") + if pemPath == "" { + panic("Require ACTOR_PEM environment variable.") + } + relayDomain := os.Getenv("RELAY_DOMAIN") + if relayDomain == "" { + panic("Require RELAY_DOMAIN environment variable.") + } + redisURL := os.Getenv("REDIS_URL") + if redisURL == "" { + redisURL = "127.0.0.1:6379" + } + + var err error + Hostkey, err = keyloader.ReadPrivateKeyRSAfromPath(pemPath) + if err != nil { + panic("Can't read Hostkey Pemfile") + } + Hostname, err = url.Parse("https://" + relayDomain) + if err != nil { + panic("Can't parse Relay Domain") + } + Actor = activitypub.GenerateActor(Hostname, &Hostkey.PublicKey) + + var macConfig = &config.Config{ + Broker: "redis://" + redisURL, + DefaultQueue: "relay", + ResultBackend: "redis://" + redisURL, + ResultsExpireIn: 5, + } + server, err := machinery.NewServer(macConfig) + if err != nil { + panic(err.Error()) + } + err = server.RegisterTask("registor", registorActivity) + if err != nil { + panic(err.Error()) + } + err = server.RegisterTask("relay", relayActivity) + if err != nil { + panic(err.Error()) + } + workerID := uuid.NewV4() + worker := server.NewWorker(workerID.String(), 200) + + fmt.Println("Welcome to YUKIMOCHI Activity-Relay [Worker]\n - Configrations") + fmt.Println("RELAY DOMAIN : ", relayDomain) + fmt.Println("REDIS URL : ", redisURL) + + err = worker.Launch() + if err != nil { + fmt.Println(err.Error()) + } +}