Regular expression to find bcrypt hash?

Question

I am looking to find bcrypt hash string using regex (in PowerGrep), in a database.

Tried this regex:

{?A-Za-z_0-9.{60}}?

But no match w

Answer 1

According to Wikipedia, bcrypt hashes follow the following format:

$2a$10$N9qo8uLOickgx2ZMRZoMyeIjZAgcfl7p92ldGxad68LJZdL17lhWy
\__/\/ \____________________/\_____________________________/
 Alg Cost      Salt                        Hash

Where valid values for each segment are:

• Alg: 2, 2a, 2b, 2x or 2y
• Cost: 4-31 (zero-padded to 2 digits)
• Salt: ./0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ x 22
• Hash: ./0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ x 31

Therefore, a comprehensive regex would look something like the following:

^[$]2[abxy]?[$](?:0[4-9]|[12][0-9]|3[01])[$][./0-9a-zA-Z]{53}$