crypto

crypto¶

The crypto utility provides cryptographic functions such as hashing, encryption, and decryption.

It is useful for:

• Hashing data
• Generating secure values
• Working with cryptographic algorithms

Availability¶

The crypto utility is available by default.

You can use it in two ways:

• Directly: crypto.xxx

• Through modules: modules.crypto.xxx

Both forms work the same.

Creating a SHA256 Hash¶

const hash = crypto
  .createHash("sha256")
  .update("data")
  .digest("hex")

The same example using modules:

const hash = modules.crypto
  .createHash("sha256")
  .update("data")
  .digest("hex")

Example Output¶

hash → "3a6eb...9f1"

Notes¶

• Cryptographic operations are synchronous
• Output format depends on the digest method used
• Use strong algorithms like sha256 or higher

Official Documentation¶

Node.js crypto Docs