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fix(assume-role): Handle AWS STS CLI errors

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Pepe Fagoaga committed 2021-11-28 18:44:28 +01:00
1 parent e74658557e
commit 63eb184f39
1 file changed
+26 -53
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include/assume_role
+26 -53
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@@ -37,66 +37,39 @@ assume_role(){
PROWLER_ROLE=arn:${AWS_PARTITION}:iam::$ACCOUNT_TO_ASSUME:role/$ROLE_TO_ASSUME
fi
#Check if external ID has bee provided if so execute with external ID if not ignore
if [[ -z $ROLE_EXTERNAL_ID ]]; then
# assume role command
$AWSCLI $PROFILE_OPT sts assume-role --role-arn $PROWLER_ROLE \
--role-session-name ProwlerAssessmentSession \
--region $REGION_FOR_STS \
--duration-seconds $SESSION_DURATION_TO_ASSUME > $TEMP_STS_ASSUMED_FILE 2>&1
else
$AWSCLI $PROFILE_OPT sts assume-role --role-arn $PROWLER_ROLE \
--role-session-name ProwlerAssessmentSession \
--duration-seconds $SESSION_DURATION_TO_ASSUME \
--region $REGION_FOR_STS \
--external-id $ROLE_EXTERNAL_ID > $TEMP_STS_ASSUMED_FILE 2>&1
fi
if [[ $(grep AccessDenied $TEMP_STS_ASSUMED_FILE) ]]; then
textFail "Access Denied assuming role $PROWLER_ROLE"
EXITCODE=1
exit $EXITCODE
elif [[ "$(grep MaxSessionDuration $TEMP_STS_ASSUMED_FILE)" ]]; then
textFail "The requested DurationSeconds exceeds the MaxSessionDuration set for the role ${PROWLER_ROLE}"
EXITCODE=1
exit $EXITCODE
fi
# Check if external ID has bee provided if so execute with external ID if not ignore
if [[ -z $ROLE_EXTERNAL_ID ]]; then
# Assume role command
if ! $AWSCLI $PROFILE_OPT sts assume-role --role-arn $PROWLER_ROLE \
--role-session-name ProwlerAssessmentSession \
--region $REGION_FOR_STS \
--duration-seconds $SESSION_DURATION_TO_ASSUME > $TEMP_STS_ASSUMED_FILE 2>"${TEMP_STS_ASSUMED_ERROR}"
then
STS_ERROR="$(cat ${TEMP_STS_ASSUMED_ERROR} | tr '\n' ' ')"
textFail "${STS_ERROR}"
EXITCODE=1
exit $EXITCODE
fi
else
if ! $AWSCLI $PROFILE_OPT sts assume-role --role-arn $PROWLER_ROLE \
--role-session-name ProwlerAssessmentSession \
--duration-seconds $SESSION_DURATION_TO_ASSUME \
--region $REGION_FOR_STS \
--external-id $ROLE_EXTERNAL_ID > $TEMP_STS_ASSUMED_FILE 2>"${TEMP_STS_ASSUMED_ERROR}"
then
STS_ERROR="$(cat ${TEMP_STS_ASSUMED_ERROR} | tr '\n' ' ')"
textFail "${STS_ERROR}"
EXITCODE=1
exit $EXITCODE
fi
ROLE_EXTERNAL_ID_OPTION=""
if [[ -n "${ROLE_EXTERNAL_ID}" ]]; then
ROLE_EXTERNAL_ID_OPTION="--external-id ${ROLE_EXTERNAL_ID}"
fi
# Assume role
if ! $AWSCLI $PROFILE_OPT sts assume-role --role-arn $PROWLER_ROLE \
--role-session-name ProwlerAssessmentSession \
--duration-seconds $SESSION_DURATION_TO_ASSUME \
--region $REGION_FOR_STS \
"${ROLE_EXTERNAL_ID_OPTION}" > $TEMP_STS_ASSUMED_FILE 2>"${TEMP_STS_ASSUMED_ERROR}"
then
STS_ERROR="$(cat ${TEMP_STS_ASSUMED_ERROR} | tr '\n' ' ')"
textFail "${STS_ERROR}"
EXITCODE=1
exit $EXITCODE
fi
# The profile shouldn't be used for CLI
PROFILE=""
PROFILE_OPT=""
# set env variables with assumed role credentials
export AWS_ACCESS_KEY_ID=$(cat $TEMP_STS_ASSUMED_FILE | jq -r '.Credentials.AccessKeyId')
export AWS_SECRET_ACCESS_KEY=$(cat $TEMP_STS_ASSUMED_FILE | jq -r '.Credentials.SecretAccessKey')
export AWS_SESSION_TOKEN=$(cat $TEMP_STS_ASSUMED_FILE | jq -r '.Credentials.SessionToken')
export AWS_SESSION_EXPIRATION=$(cat $TEMP_STS_ASSUMED_FILE | jq -r '.Credentials.Expiration | sub("\\+00:00";"Z") | fromdateiso8601')
# Set AWS environment variables with assumed role credentials
AWS_ACCESS_KEY_ID=$(jq -r '.Credentials.AccessKeyId' "${TEMP_STS_ASSUMED_FILE}")
export AWS_ACCESS_KEY_ID
AWS_SECRET_ACCESS_KEY=$(jq -r '.Credentials.SecretAccessKey' "${TEMP_STS_ASSUMED_FILE}")
export AWS_SECRET_ACCESS_KEY
AWS_SESSION_TOKEN=$(jq -r '.Credentials.SessionToken' "${TEMP_STS_ASSUMED_FILE}")
export AWS_SESSION_TOKEN
AWS_SESSION_EXPIRATION=$(jq -r '.Credentials.Expiration | sub("\\+00:00";"Z") | fromdateiso8601' "${TEMP_STS_ASSUMED_FILE}")
export AWS_SESSION_EXPIRATION
cleanSTSAssumeFile
}