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fix for metadata token #88

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fix for metadata token #88

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35ab5a9
fix for metadata token
Apr 25, 2022
116bc96
also need to add for get_instance_region
Apr 25, 2022
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30 changes: 30 additions & 0 deletions s3iam.py
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Original file line number Diff line number Diff line change
Expand Up @@ -119,6 +119,12 @@ def prereposetup_hook(conduit):
if isinstance(repo, YumRepository) and repo.s3_enabled:
replace_repo(repos, repo)

class PutRequest(urllib2.Request):
"""class to handling putting with urllib2"""

def get_method(self, *args, **kwargs):
return 'PUT'


class S3Repository(YumRepository):
"""Repository object for Amazon S3, using IAM Roles."""
Expand Down Expand Up @@ -189,8 +195,10 @@ def grab(self):
if self.access_id and self.secret_key:
self.grabber.set_credentials(self.access_id, self.secret_key)
elif self.delegated_role:
self.grabber.get_imdsv2_credentials()
self.grabber.get_delegated_role_credentials(self.delegated_role)
else:
self.grabber.get_imdsv2_credentials()
self.grabber.get_role()
self.grabber.get_credentials()
return self.grabber
Expand Down Expand Up @@ -226,13 +234,32 @@ def __init__(self, repo):
self.secret_key = None
self.token = None

def get_imdsv2_credentials(self):
"""Need token for querying metadata"""
request = PutRequest(
urlparse.urljoin(
"http://169.254.169.254",
"/latest/api/token"
))
request.add_header('X-aws-ec2-metadata-token-ttl-seconds', 300)

try:
response = urllib2.urlopen(request)
self.imdsv2_token = (response.read())
except Exception:
response = None
finally:
if response:
response.close()

def get_role(self):
"""Read IAM role from AWS metadata store."""
request = urllib2.Request(
urlparse.urljoin(
"http://169.254.169.254",
"/latest/meta-data/iam/security-credentials/"
))
request.add_header('X-aws-ec2-metadata-token', self.imdsv2_token)

try:
response = urllib2.urlopen(request)
Expand All @@ -256,6 +283,8 @@ def get_credentials(self):
"latest/meta-data/iam/security-credentials/",
), self.iamrole))

request.add_header('X-aws-ec2-metadata-token', self.imdsv2_token)

try:
response = urllib2.urlopen(request)
data = json.loads(response.read())
Expand Down Expand Up @@ -313,6 +342,7 @@ def get_instance_region(self):
"/latest/meta-data/placement/availability-zone"
))

request.add_header('X-aws-ec2-metadata-token', self.imdsv2_token)
response = None
try:
response = urllib2.urlopen(request)
Expand Down