Module mask 

Available on crate feature mask only.

Sensitive-data masking helpers.

Each function takes a &str and returns a String. Inputs that don’t match the expected shape are returned with a best-effort mask rather than panicking — these functions are intended for log output, where crashing is worse than over-masking.

Functions

mask_bank_card

Mask a bank card number, keeping the first 4 and last 4 digits.

mask_email

Mask an email address: alice@example.com → a***@example.com.

mask_id_card

Mask a Chinese ID card number (15 or 18 digits/X): 110101199001011234 → 110101********1234.

mask_middle

Generic helper: keep prefix chars at the start and suffix chars at the end, replacing the middle with stars (one star per masked char).

mask_name

Mask a Chinese name.

mask_phone

Mask a Chinese mainland mobile number: 13812345678 → 138****5678.

mask_secret

Generic credential masking — port of du-node-utils.maskSecret.

mask_token

Mask an API token / secret. Shows the first 4 and last 4 characters, or fully stars out short inputs.