How do you generate a SHA hash for a given string in Golang?

Generating a SHA Hash for a Given String in Golang

One of the most typical cryptographic operations performed with strings is computing their SHA hash. The SHA (Secure Hash Algorithm) algorithm generates a unique fingerprint by taking a string as input. In Golang, creating a SHA hash is a straightforward process.

Example Usage

For instance, let's compute the SHA hash of the string "beautiful." The following code snippet provides a practical example:

import (
    "crypto/sha1"
    "encoding/base64"
)

func main() {
    myPassword := "beautiful"

    hasher := sha1.New()
    hasher.Write([]byte(myPassword))
    sha := base64.URLEncoding.EncodeToString(hasher.Sum(nil))

    println(sha)
}

This code demonstrates:

• Encoding the string "beautiful" into a byte array using []byte(myPassword)
• Creating a new SHA1 hasher using sha1.New()
• Using hasher.Write() to feed the string to the hasher
• Obtaining the raw bytes of the hash using hasher.Sum(nil)
• Optionally, encoding the hash bytes in base64 for human readability using base64.URLEncoding.EncodeToString()

The resulting sha variable contains the base64-encoded SHA hash of the original string, which can be conveniently displayed or compared.

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