crypto
Cryptoimport "crypto"Collects common cryptographic constants and interfaces used across crypto sub-packages.
Example
package main
import (
"crypto/sha256"
"fmt"
)
func main() {
h := sha256.Sum256([]byte("hello"))
fmt.Printf("%x\n", h)
}Key Types & Functions
HashSignerPublicKeyPrivateKeyAbout crypto
The crypto package (imported as crypto) belongs to the Crypto category of Go packages. Collects common cryptographic constants and interfaces used across crypto sub-packages.
Go's standard library is one of the language's greatest strengths, providing production-ready implementations for networking, cryptography, encoding, I/O, and more. The crypto package follows Go's philosophy of simplicity and composability — small, focused packages that combine through interfaces like io.Reader and io.Writer.
When using crypto in production, follow Go best practices: handle errors explicitly, use context for cancellation and timeouts, prefer composition over inheritance, and write table-driven tests. The Go documentation at pkg.go.dev provides comprehensive API references and examples for every exported type and function.