之前稍微了解過Client Identity Chaincode Library,這幾天正好開始實際應用。
雖然了解過,還是發現了不少之前理解的不足,也踩了不少坑。
先列出官方介紹: https://github.com/hyperledger/fabric/blob/release-1.1/core/chaincode/lib/cid/README.md
1,首先要給注冊的user添加attrs,但是在ca 數據庫中看不到,chaincode 層也查不到
查看CA的log,並沒有報錯,user也成功enroll,
chaincode層查找fabric 默認的attrs,則可以查到。然后意識到,需要在ca-server-config.yaml中添加需要的attrs。
2,在chaincode中 import http://github.com/hyperledger/fabric/core/chaincode/lib/cid,compile的時候總是說找不到 github.com/hyperledger/fabric/core/chaincode/lib/cid
錯誤消息說的很明確,但是由於對go語言及擴展知識理解不做,踩了不少坑。
shim包可以引入成功,但是並不知道shim包在哪里,也不知道應該怎么引入新包。於是系統中搜索shim,但是找不到結果。
上網查找,很確認這里是正解:https://stackoverflow.com/questions/49560104/cannot-find-package-cid-in-goroot-or-gopath
但是還是不是很明白,最后參考abac的例子和govendor的文檔,才搞定
下面是一些關鍵代碼:
ca-config.yaml
registry:
# Maximum number of times a password/secret can be reused for enrollment
# (default: -1, which means there is no limit)
maxenrollments: -1
# Contains identity information which is used when LDAP is disabled
identities:
- name: admin
pass: adminpw
type: client
affiliation: ""
attrs:
hf.Registrar.Roles: "peer,orderer,client,user"
hf.Registrar.DelegateRoles: "peer,orderer,client,user"
hf.Revoker: true
hf.IntermediateCA: true
hf.GenCRL: true
hf.Registrar.Attributes: "*"
hf.AffiliationMgr: true
permissions: "*"
node js
let secret = await caClient.register({
enrollmentID: username,
affiliation: userOrg.toLowerCase() + '.department1',
attrs:[{name:"hf.Registrar.Attributes",value:"query",ecert:true},
{name:"permissions",value:"query",ecert:true}]
//attrs:reg_attr
}, adminUserObj);
chaincode
// Get the client ID object
id, err := cid.New(stub)
fmt.Println("client ID object:")
fmt.Println(id)
if err != nil {
return shim.Error(err.Error())
}
mspid, err := id.GetMSPID()
fmt.Println("mspid:")
fmt.Println(mspid)
if err != nil {
return shim.Error(err.Error())
}
cert, err := cid.GetX509Certificate(stub)
fmt.Println("cert:")
fmt.Printf("%+v\n", cert)
fmt.Println("cert.Extensions :")
fmt.Printf("%+v\n", cert.Extensions)
fmt.Println("cert.Subject.CommonName:")
fmt.Println(cert.Subject.CommonName)
val, ok, err := cid.GetAttributeValue(stub, "hf.Registrar.Attributes")
if err != nil {
return shim.Error(err.Error())
}
if !ok {
return shim.Error("The client identity does not possess the attribute:hf.Registrar.Attributes")
}
fmt.Println("hf.Registrar.Attributes:")
fmt.Println(val)
val, ok, err = cid.GetAttributeValue(stub, "permissions")
if err != nil {
return shim.Error(err.Error())
}
if !ok {
return shim.Error("The client identity does not possess the attribute:permissions")
}
fmt.Println("permissions:")
fmt.Println(val)
