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aws: add role delegation and MFA support as per IAM Best Practices (#8419)

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* Added role delegation support and MFA support as per IAM Best Practices

* fix: grep with color enabled breaks profile parsing

* fix: compatible with MacOS basic sed

* docs: Added jq as a dependency

* feat: added variable session duration, if the role to be assumed permits it.

* bug: incorrect assigment for session length

* fix: profile extraction failed with some versions of sed

Fixed the issue that resulted from merging upstream changes to allow "." in the profile name

* fix: broken profile parsing when profile name contains "@"
This commit is contained in:
Maksym 2020-10-24 22:07:49 +01:00 committed by GitHub
parent 66f9fdabc1
commit fcb6fa78a1
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2 changed files with 58 additions and 6 deletions
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2
plugins/aws/README.md
View file

@ -3,7 +3,7 @@
This plugin provides completion support for [awscli](https://docs.aws.amazon.com/cli/latest/reference/index.html)
and a few utilities to manage AWS profiles and display them in the prompt.
To use it, add `aws` to the plugins array in your zshrc file.
To use it, make sure [jq](https://stedolan.github.io/jq/download/) is installed, and add `aws` to the plugins array in your zshrc file.
```zsh
plugins=(... aws)

56
plugins/aws/aws.plugin.zsh
View file

@ -5,7 +5,7 @@ function agp() {
# AWS profile selection
function asp() {
if [[ -z "$1" ]]; then
unset AWS_DEFAULT_PROFILE AWS_PROFILE AWS_EB_PROFILE
unset AWS_DEFAULT_PROFILE AWS_PROFILE AWS_EB_PROFILE AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY AWS_SESSION_TOKEN
echo AWS profile cleared.
return
fi
@ -18,9 +18,61 @@ function asp() {
return 1
fi
local exists="$(aws configure get aws_access_key_id --profile $1)"
local role_arn="$(aws configure get role_arn --profile $1)"
local aws_access_key_id=""
local aws_secret_access_key=""
local aws_session_token=""
if [[ -n $exists || -n $role_arn ]]; then
if [[ -n $role_arn ]]; then
local mfa_serial="$(aws configure get mfa_serial --profile $1)"
local mfa_token=""
local mfa_opt=""
if [[ -n $mfa_serial ]]; then
echo "Please enter your MFA token for $mfa_serial:"
read mfa_token
echo "Please enter the session duration in seconds (900-43200; default: 3600, which is the default maximum for a role):"
read sess_duration
if [[ -z $sess_duration ]]; then
sess_duration = 3600
fi
mfa_opt="--serial-number $mfa_serial --token-code $mfa_token --duration-seconds $sess_duration"
fi
local ext_id="$(aws configure get external_id --profile $1)"
local extid_opt=""
if [[ -n $ext_id ]]; then
extid_opt="--external-id $ext_id"
fi
local profile=$1
local source_profile="$(aws configure get source_profile --profile $1)"
if [[ -n $source_profile ]]; then
profile=$source_profile
fi
echo "Assuming role $role_arn using profile $profile"
local assume_cmd=(aws sts assume-role "--profile=$profile" "--role-arn $role_arn" "--role-session-name "$profile"" "$mfa_opt" "$extid_opt")
local JSON="$(eval ${assume_cmd[@]})"
aws_access_key_id="$(echo $JSON | jq -r '.Credentials.AccessKeyId')"
aws_secret_access_key="$(echo $JSON | jq -r '.Credentials.SecretAccessKey')"
aws_session_token="$(echo $JSON | jq -r '.Credentials.SessionToken')"
else
aws_access_key_id="$(aws configure get aws_access_key_id --profile $1)"
aws_secret_access_key="$(aws configure get aws_secret_access_key --profile $1)"
aws_session_token=""
fi
export AWS_DEFAULT_PROFILE=$1
export AWS_PROFILE=$1
export AWS_EB_PROFILE=$1
export AWS_ACCESS_KEY_ID=$aws_access_key_id
export AWS_SECRET_ACCESS_KEY=$aws_secret_access_key
[[ -z "$aws_session_token" ]] && unset AWS_SESSION_TOKEN || export AWS_SESSION_TOKEN=$aws_session_token
echo "Switched to AWS Profile: $1";
fi
}
function aws_change_access_key() {
@ -41,7 +93,7 @@ function aws_change_access_key() {
function aws_profiles() {
[[ -r "${AWS_CONFIG_FILE:-$HOME/.aws/config}" ]] || return 1
grep '\[profile' "${AWS_CONFIG_FILE:-$HOME/.aws/config}"|sed -e 's/.*profile \([a-zA-Z0-9@_\.-]*\).*/\1/'
grep --color=never -Eo '\[.*\]' "${AWS_CONFIG_FILE:-$HOME/.aws/config}" | sed -E 's/^[[:space:]]*\[(profile)?[[:space:]]*([-_[:alnum:]\.@]+)\][[:space:]]*$/\2/g'
}
function _aws_profiles() {