How to import and use the crypto package in Go?

To import and use the crypto package in Go, you can follow these steps:

Import the crypto package in your Go code by including the following import statement at the beginning of your program:

import "crypto"

Once imported, you can use various sub-packages and functions provided by the crypto package. For example, to perform encryption and decryption using symmetric key algorithms, you can import the crypto/cipher package:

import "crypto/cipher"

You can now use functions and types from the expanded crypto/cipher package. For instance, to create a new AES cipher block using the ECB mode of operation, you can write the following code:

block, err := aes.NewCipher(key)

Here, key refers to the secret key used by the AES cipher.

Similarly, you can use other sub-packages provided by the crypto package, such as crypto/des for DES encryption, crypto/rsa for RSA encryption, or crypto/hmac for HMAC-based message authentication codes, to name a few.

Remember to consult the official Go documentation for detailed information on the various functions and types available in the crypto package, depending on your specific encryption/decryption requirements.