How can I generate secure random integers and tokens using the 'crypto/rand' package in Go?

How to Generate Secure Random Ints Using the "crypto/rand" Package

This code generates a random integer between 0 and 27 using the "crypto/rand" package. The function requires a maximum value, so we create a big.Int representing 27.

nBig, err := rand.Int(rand.Reader, big.NewInt(27))

Why Return a Pointer to a Big.Int?

The Int function returns a pointer to a big.Int because big.Int is an arbitrary-precision integer type. It can represent integers of any size, while built-in Go ints have a limited range.

Generating Secure Tokens

To generate a secure token, tokens should use a strong source of randomness and be encoded using a suitable encoding format. The example code uses base32 encoding to represent the random bytes in a compact and human-readable form.

token := getToken(10)

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