AWS Lambda to use caller identity
0
In a mobile App, I want a lambda function to be able to access only rows in the DynamoDB where the key is the userId which calls the Lambda.
I've set the below policy, but I keep getting
User: arn:aws:sts::XXX:assumed-role/FederatedIdentityRole/CognitoIdentityCredentials is not authorized to perform: dynamodb:GetItem on resource: arn:aws:dynamodb:us-east-1:XXX:table/UserData
Any hints are welcome.
Thanks
Below is the Lambda's policy:
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": [
"dynamodb:BatchGetItem",
"dynamodb:BatchWriteItem",
"dynamodb:PutItem",
"dynamodb:GetItem",
"dynamodb:Query",
"dynamodb:UpdateItem"
],
"Resource": [
"arn:aws:dynamodb:us-east-1:XXX:table/UserData"
],
"Condition": {
"ForAllValues:StringEquals": {
"dynamodb:LeadingKeys": "${cognito-identity.amazonaws.com:sub}"
}
}
}
amazon-web-services aws-lambda amazon-dynamodb
asked Nov 26 '18 at 12:09
HanchHanch
122
add a comment |
0
In a mobile App, I want a lambda function to be able to access only rows in the DynamoDB where the key is the userId which calls the Lambda.
I've set the below policy, but I keep getting
User: arn:aws:sts::XXX:assumed-role/FederatedIdentityRole/CognitoIdentityCredentials is not authorized to perform: dynamodb:GetItem on resource: arn:aws:dynamodb:us-east-1:XXX:table/UserData
Any hints are welcome.
Thanks
Below is the Lambda's policy:
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": [
"dynamodb:BatchGetItem",
"dynamodb:BatchWriteItem",
"dynamodb:PutItem",
"dynamodb:GetItem",
"dynamodb:Query",
"dynamodb:UpdateItem"
],
"Resource": [
"arn:aws:dynamodb:us-east-1:XXX:table/UserData"
],
"Condition": {
"ForAllValues:StringEquals": {
"dynamodb:LeadingKeys": "${cognito-identity.amazonaws.com:sub}"
}
}
}
amazon-web-services aws-lambda amazon-dynamodb
asked Nov 26 '18 at 12:09
HanchHanch
122
Your issue is around your use of "cognito-identity.amazonaws.com:sub". See stackoverflow.com/questions/42605419/…
– K Mo
Nov 28 '18 at 8:42
Well, I just found out that the ${cognito-identity.amazonaws.com:sub} doesn't really refer to the 'sub' field in the authetication token you get from cognito user pool, but rather to the IdentityId you get from the the identityPool for that user!!
– Hanch
Dec 11 '18 at 20:58
add a comment |
0
0
0
In a mobile App, I want a lambda function to be able to access only rows in the DynamoDB where the key is the userId which calls the Lambda.
I've set the below policy, but I keep getting
User: arn:aws:sts::XXX:assumed-role/FederatedIdentityRole/CognitoIdentityCredentials is not authorized to perform: dynamodb:GetItem on resource: arn:aws:dynamodb:us-east-1:XXX:table/UserData
Any hints are welcome.
Thanks
Below is the Lambda's policy:
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": [
"dynamodb:BatchGetItem",
"dynamodb:BatchWriteItem",
"dynamodb:PutItem",
"dynamodb:GetItem",
"dynamodb:Query",
"dynamodb:UpdateItem"
],
"Resource": [
"arn:aws:dynamodb:us-east-1:XXX:table/UserData"
],
"Condition": {
"ForAllValues:StringEquals": {
"dynamodb:LeadingKeys": "${cognito-identity.amazonaws.com:sub}"
}
}
}
amazon-web-services aws-lambda amazon-dynamodb
asked Nov 26 '18 at 12:09
HanchHanch
122
In a mobile App, I want a lambda function to be able to access only rows in the DynamoDB where the key is the userId which calls the Lambda.
I've set the below policy, but I keep getting
User: arn:aws:sts::XXX:assumed-role/FederatedIdentityRole/CognitoIdentityCredentials is not authorized to perform: dynamodb:GetItem on resource: arn:aws:dynamodb:us-east-1:XXX:table/UserData
Any hints are welcome.
Thanks
Below is the Lambda's policy:
{
"Sid": "VisualEditor0",
"Effect": "Allow",
"Action": [
"dynamodb:BatchGetItem",
"dynamodb:BatchWriteItem",
"dynamodb:PutItem",
"dynamodb:GetItem",
"dynamodb:Query",
"dynamodb:UpdateItem"
],
"Resource": [
"arn:aws:dynamodb:us-east-1:XXX:table/UserData"
],
"Condition": {
"ForAllValues:StringEquals": {
"dynamodb:LeadingKeys": "${cognito-identity.amazonaws.com:sub}"
}
}
}
amazon-web-services aws-lambda amazon-dynamodb
amazon-web-services aws-lambda amazon-dynamodb
asked Nov 26 '18 at 12:09
HanchHanch
122
asked Nov 26 '18 at 12:09
HanchHanch
122
asked Nov 26 '18 at 12:09
HanchHanch
122
asked Nov 26 '18 at 12:09
HanchHanch
122
asked Nov 26 '18 at 12:09
HanchHanch
122
122
Your issue is around your use of "cognito-identity.amazonaws.com:sub". See stackoverflow.com/questions/42605419/…
– K Mo
Nov 28 '18 at 8:42
Well, I just found out that the ${cognito-identity.amazonaws.com:sub} doesn't really refer to the 'sub' field in the authetication token you get from cognito user pool, but rather to the IdentityId you get from the the identityPool for that user!!
– Hanch
Dec 11 '18 at 20:58
add a comment |
Your issue is around your use of "cognito-identity.amazonaws.com:sub". See stackoverflow.com/questions/42605419/…
– K Mo
Nov 28 '18 at 8:42
Well, I just found out that the ${cognito-identity.amazonaws.com:sub} doesn't really refer to the 'sub' field in the authetication token you get from cognito user pool, but rather to the IdentityId you get from the the identityPool for that user!!
– Hanch
Dec 11 '18 at 20:58
Your issue is around your use of "cognito-identity.amazonaws.com:sub". See stackoverflow.com/questions/42605419/…
– K Mo
Nov 28 '18 at 8:42
Your issue is around your use of "cognito-identity.amazonaws.com:sub". See stackoverflow.com/questions/42605419/…
– K Mo
Nov 28 '18 at 8:42
Well, I just found out that the ${cognito-identity.amazonaws.com:sub} doesn't really refer to the 'sub' field in the authetication token you get from cognito user pool, but rather to the IdentityId you get from the the identityPool for that user!!
– Hanch
Dec 11 '18 at 20:58
Well, I just found out that the ${cognito-identity.amazonaws.com:sub} doesn't really refer to the 'sub' field in the authetication token you get from cognito user pool, but rather to the IdentityId you get from the the identityPool for that user!!
– Hanch
Dec 11 '18 at 20:58
add a comment |
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Your issue is around your use of "cognito-identity.amazonaws.com:sub". See stackoverflow.com/questions/42605419/…
– K Mo
Nov 28 '18 at 8:42
Well, I just found out that the ${cognito-identity.amazonaws.com:sub} doesn't really refer to the 'sub' field in the authetication token you get from cognito user pool, but rather to the IdentityId you get from the the identityPool for that user!!
– Hanch
Dec 11 '18 at 20:58