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Update Yubikey scripts to support device name #1245

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Update Yubikey scripts to support device name #1245

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15 changes: 12 additions & 3 deletions contrib/scripts/aws-iam-create-yubikey-mfa.sh
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
#!/bin/sh
# Adds a Yubikey TOTP device to IAM using your IAM User as the $MFA_DEVICE_NAME
# Currently, aws iam enable-mfa-device doesn't support specifying your MFA Device Name.
# Adds a Yubikey TOTP device to IAM user.
# By default the device name is set to "YubiKey-<serial number>" but can be
# overridden with the $MFA_DEVICE_NAME environment variable.

set -eu

Expand All @@ -9,6 +10,11 @@ if [ -n "${AWS_SESSION_TOKEN:-}" ]; then
exit 1
fi

if [ -z "${MFA_DEVICE_NAME:-}" ]; then
MFA_DEVICE_NAME=YubiKey-$(ykman list --serials | tr -d '\n')
fi


ACCOUNT_ARN=$(aws sts get-caller-identity --query Arn --output text)

# Assume that the final portion of the ARN is the username
Expand All @@ -19,7 +25,7 @@ OUTFILE=$(mktemp)
trap 'rm -f "$OUTFILE"' EXIT

SERIAL_NUMBER=$(aws iam create-virtual-mfa-device \
--virtual-mfa-device-name "$USERNAME" \
--virtual-mfa-device-name "$MFA_DEVICE_NAME" \
--bootstrap-method Base32StringSeed \
--outfile "$OUTFILE" \
--query VirtualMFADevice.SerialNumber \
Expand All @@ -40,3 +46,6 @@ aws iam enable-mfa-device \
--serial-number "$SERIAL_NUMBER" \
--authentication-code1 "$CODE1" \
--authentication-code2 "$CODE2"

echo "mfa_serial = $SERIAL_NUMBER"
echo "mfa_process = ykman oath accounts code --single $SERIAL_NUMBER"
11 changes: 8 additions & 3 deletions contrib/scripts/aws-iam-resync-yubikey-mfa.sh
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Original file line number Diff line number Diff line change
@@ -1,17 +1,22 @@
#!/bin/sh
# Resync a Yubikey TOTP device to IAM using your IAM User as the $MFA_DEVICE_NAME
# Currently, aws iam resync-mfa-device doesn't support specifying your MFA Device Name.
# Resync a Yubikey TOTP device to IAM user
# By default the device name is set to "YubiKey-<serial number>" but can be
# overridden with the $MFA_DEVICE_NAME environment variable.

set -eu

if [ -z "${MFA_DEVICE_NAME:-}" ]; then
MFA_DEVICE_NAME="YubiKey-$(ykman list --serials | tr -d '\n')"
fi

ACCOUNT_ARN=$(aws sts get-caller-identity --query Arn --output text)

# Assume that the final portion of the ARN is the username
# Works for ARNs like `users/<user>` and `users/engineers/<user>`
USERNAME=$(echo "$ACCOUNT_ARN" | rev | cut -d/ -f1 | rev)

ACCOUNT_ID=$(echo "$ACCOUNT_ARN" | cut -d: -f5)
SERIAL_NUMBER="arn:aws:iam::${ACCOUNT_ID}:mfa/${USERNAME}"
SERIAL_NUMBER="arn:aws:iam::${ACCOUNT_ID}:mfa/${MFA_DEVICE_NAME}"

CODE1=$(ykman oath accounts code -s "$SERIAL_NUMBER")

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