const crypto/sha256.magic256

5 uses

	crypto/sha256 (current package)
		sha256.go#L61: 	magic256      = "sha\x03"
		sha256.go#L62: 	marshaledSize = len(magic256) + 8*4 + chunk + 8
		sha256.go#L70: 		b = append(b, magic256...)
		sha256.go#L87: 	if len(b) < len(magic224) || (d.is224 && string(b[:len(magic224)]) != magic224) || (!d.is224 && string(b[:len(magic256)]) != magic256) {