I am having an hard time calling the Tuya API while using curl.
Tuya requires to generate a signature as following: HMAC-SHA256(client_id + t, secret). I built a small script that does exactly what Tuya asks. I have also double checked by trying to generate the signature using the same client_id, t and secret that are in their documentation as example, and the generated signature matches what the documentation says.
client_id is a pre-assigned value t is the timestamp in 13 digits (and here I think is where the error is) secret is a pre-assigned value
Once the signature is built it needs to be used via curl in a POST call, but Tuya keeps refusing the signature with the following error:
{"code":1004,"msg":"sign invalid","success":false,"t":1664314067553}
Now, I think that the issue is the timing. In order for my script to generate the signature few milliseconds are required and when the value of t gets passed to curl it won't match with the execution of curl (of course). Here's my code:
t=($(($(date +%s%N)/1000000))); sign1=$(echo -n "yyr8hxxxxxxxxd4mji$t" | openssl dgst -sha256 -hmac "cc75fd7xxxxxxxxx63d032b" | awk '{print$2}') && sign2=$(echo ${sign1^^}) ; curl --request POST "https://openapi.tuyaeu.com/v1.0/iot-03/devices/717715xxxxxxx520/commands" --header "sign_method: HMAC-SHA256" --header "client_id: yyr8hxxxxxxxxd4mji" --header "t: t" --header "mode: cors" --header "sign: $sign2" --header "access_token: cc75fd7xxxxxxxxx63d032b" --data "{"commands":[{"code":"switch_1","value":true}]}"
I've of course already tried to use && to execute all commands together but there has been no change. Does someone have any idea?
Your sign
is invalid.
Declare your variables:
ClientID="replace_with_you_client_Id yyr8hxxxxxxxxd4mji"
ClientSecret="replace_with_you_client_secret cc75fd7xxxxxxxxx63d032b"
Device="replace_with_your_device 717715xxxxxxx520"
First you have to get an access_token
:
AccessToken=$(t=$(date +%s%N |sed "s/......$//g"); curl -sSLkX GET "https://openapi.tuyaeu.com/v1.0/token?grant_type=1" -H "sign_method: HMAC-SHA256" -H "client_id: $ClientID" -H "t: $t" -H "mode: cors" -H "Content-Type: application/json" -H "sign: $(echo -en "${ClientID}${t}GET\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855\n\n/v1.0/token?grant_type=1" | openssl dgst -sha256 -hmac "$ClientSecret" | tr '[:lower:]' '[:upper:]' |sed "s/.* //g")" -H "access_token: " | sed "s/.*\"access_token\":\"//g" |sed "s/\".*//g")`
Then you need to calculate the good "sign". You need you ClientId
, the timestamp, the access_token
, the method, the encoded_body
, the url
:
TimeStamp=$(date +%s%N |sed "s/......$//g")
METHOD='POST'
BODY='{"commands":[{"code":"switch_1","value":true}]}'
encodedBody=$(echo -n "$BODY" | openssl dgst -sha256 | sed "s/.*[ ]//g")
URL="/v1.0/iot-03/devices/$Device/commands"
Calculate sign
:
SIGN=$(echo -n "$ClientID${AccessToken}${TimeStamp}${METHOD}
$encodedBody
$URL" | openssl dgst -sha256 -hmac "$ClientSecret" | tr '[:lower:]' '[:upper:]' |sed "s/.* //g")`
Or in one line:
SIGN=$(echo -en "$ClientID${AccessToken}${TimeStamp}${METHOD}\n$encodedBody\n\n$URL" | openssl dgst -sha256 -hmac "$ClientSecret" | tr '[:lower:]' '[:upper:]' |sed "s/.* //g")
Then send the request:
curl -sSLkX $METHOD "https://openapi.tuyaeu.com$URL" -H "sign_method: HMAC-SHA256" -H "client_id: $ClientID" -H "t: $TimeStamp" -H "mode: cors" -H "Content-Type: application/json" -H "sign: $SIGN" -H "access_token: $AccessToken" -d "$BODY"