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Add aws web identity provider #9

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16 changes: 14 additions & 2 deletions plugins/aws/aws_client.go
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,9 @@ import (
"github.com/aws/aws-sdk-go/aws/session"
ec2 "github.com/aws/aws-sdk-go/service/ec2"
"github.com/aws/aws-sdk-go/service/ecs"
"github.com/aws/aws-sdk-go/service/sts"
tbnflag "github.com/turbinelabs/nonstdlib/flag"
"os"
)

// client represents the command-line flags specifying configuration of
Expand Down Expand Up @@ -98,20 +100,29 @@ func (ff *clientImpl) awsCredentials() *credentials.Credentials {
// awsSession on the call to `session.New()
defaultConfig := defaults.Config()
defaultHandlers := defaults.Handlers()

customProvider := &credentials.StaticProvider{
Value: credentials.Value{
AccessKeyID: ff.awsAccessKeyID,
SecretAccessKey: ff.awsSecretAccessKey,
},
}

webIdentityProvider := stscreds.NewWebIdentityRoleProvider(
sts.New(&session.Session{
Config: defaultConfig,
Handlers: defaultHandlers,
}),
os.Getenv("AWS_ROLE_ARN"),
"rotor-sess-dev",
os.Getenv("AWS_WEB_IDENTITY_TOKEN_FILE"),
)

// Unfortunately AWS doesn't have a variable for its default providers.
// So this mimics the latest provider chain in the defaults package
// located at
// https://github.com/aws/aws-sdk-go/blob/d856824058f17a35c61cabdfb1c40559ce070cd9/aws/defaults/defaults.go#L95-L99
// This takes the default chain, and adds the `legacy` cli way to highest
// hierachy. Currently have an issue to address this in aws-sdk-go
// hierarchy. Currently have an issue to address this in aws-sdk-go
// https://github.com/aws/aws-sdk-go/issues/2051
return credentials.NewCredentials(
&credentials.ChainProvider{
Expand All @@ -120,6 +131,7 @@ func (ff *clientImpl) awsCredentials() *credentials.Credentials {
customProvider,
&credentials.EnvProvider{},
&credentials.SharedCredentialsProvider{Filename: "", Profile: ""},
webIdentityProvider,
defaults.RemoteCredProvider(*defaultConfig, defaultHandlers),
},
},
Expand Down