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credentials.go
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credentials.go
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package session
// Copy from https://github.com/aws/aws-sdk-go
// May have been modified by Beijing Volcanoengine Technology Ltd.
import (
"fmt"
"github.com/volcengine/volcengine-go-sdk/volcengine"
"github.com/volcengine/volcengine-go-sdk/volcengine/credentials"
"github.com/volcengine/volcengine-go-sdk/volcengine/credentials/processcreds"
"github.com/volcengine/volcengine-go-sdk/volcengine/request"
"github.com/volcengine/volcengine-go-sdk/volcengine/volcengineerr"
)
func resolveCredentials(cfg *volcengine.Config,
envCfg envConfig, sharedCfg sharedConfig,
handlers request.Handlers,
sessOpts Options,
) (*credentials.Credentials, error) {
switch {
case len(sessOpts.Profile) != 0:
// User explicitly provided an Profile in the session's configuration
// so load that profile from shared config first.
// Github(volcengine/volcengine-go-sdk#2727)
return resolveCredsFromProfile(cfg, envCfg, sharedCfg, handlers, sessOpts)
case envCfg.Creds.HasKeys():
// Environment credentials
return credentials.NewStaticCredentialsFromCreds(envCfg.Creds), nil
default:
// Fallback to the "default" credential resolution chain.
return resolveCredsFromProfile(cfg, envCfg, sharedCfg, handlers, sessOpts)
}
}
func resolveCredsFromProfile(cfg *volcengine.Config,
envCfg envConfig, sharedCfg sharedConfig,
handlers request.Handlers,
sessOpts Options,
) (creds *credentials.Credentials, err error) {
switch {
case sharedCfg.SourceProfile != nil:
// Assume IAM role with credentials source from a different profile.
creds, err = resolveCredsFromProfile(cfg, envCfg,
*sharedCfg.SourceProfile, handlers, sessOpts,
)
case sharedCfg.Creds.HasKeys():
// Static Credentials from Shared Config/Credentials file.
creds = credentials.NewStaticCredentialsFromCreds(
sharedCfg.Creds,
)
case len(sharedCfg.CredentialProcess) != 0:
// Get credentials from CredentialProcess
creds = processcreds.NewCredentials(sharedCfg.CredentialProcess)
case len(sharedCfg.CredentialSource) != 0:
creds, err = resolveCredsFromSource(cfg, envCfg,
sharedCfg, handlers, sessOpts,
)
default:
// Fallback to default credentials provider, include mock errors for
// the credential chain so user can identify why credentials failed to
// be retrieved.
creds = credentials.NewCredentials(&credentials.ChainProvider{
VerboseErrors: volcengine.BoolValue(cfg.CredentialsChainVerboseErrors),
Providers: []credentials.Provider{
&credProviderError{
Err: volcengineerr.New("EnvAccessKeyNotFound",
"failed to find credentials in the environment.", nil),
},
&credProviderError{
Err: volcengineerr.New("SharedCredsLoad",
fmt.Sprintf("failed to load profile, %s.", envCfg.Profile), nil),
},
},
})
}
if err != nil {
return nil, err
}
return creds, nil
}
// valid credential source values
const (
credSourceEc2Metadata = "Ec2InstanceMetadata"
credSourceEnvironment = "Environment"
credSourceECSContainer = "EcsContainer"
)
func resolveCredsFromSource(cfg *volcengine.Config,
envCfg envConfig, sharedCfg sharedConfig,
handlers request.Handlers,
sessOpts Options,
) (creds *credentials.Credentials, err error) {
switch sharedCfg.CredentialSource {
case credSourceEnvironment:
creds = credentials.NewStaticCredentialsFromCreds(envCfg.Creds)
default:
return nil, ErrSharedConfigInvalidCredSource
}
return creds, nil
}
type credProviderError struct {
Err error
}
func (c credProviderError) Retrieve() (credentials.Value, error) {
return credentials.Value{}, c.Err
}
func (c credProviderError) IsExpired() bool {
return true
}