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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import "go/ast"
func init() {
register(hmacNewFix)
}
var hmacNewFix = fix{
"hmacnew",
"2012-01-19",
hmacnew,
`Deprecate hmac.NewMD5, hmac.NewSHA1 and hmac.NewSHA256.
This fix rewrites code using hmac.NewMD5, hmac.NewSHA1 and hmac.NewSHA256 to
use hmac.New:
hmac.NewMD5(key) -> hmac.New(md5.New, key)
hmac.NewSHA1(key) -> hmac.New(sha1.New, key)
hmac.NewSHA256(key) -> hmac.New(sha256.New, key)
`,
}
func hmacnew(f *ast.File) (fixed bool) {
if !imports(f, "crypto/hmac") {
return
}
walk(f, func(n interface{}) {
ce, ok := n.(*ast.CallExpr)
if !ok {
return
}
var pkg string
switch {
case isPkgDot(ce.Fun, "hmac", "NewMD5"):
pkg = "md5"
case isPkgDot(ce.Fun, "hmac", "NewSHA1"):
pkg = "sha1"
case isPkgDot(ce.Fun, "hmac", "NewSHA256"):
pkg = "sha256"
default:
return
}
addImport(f, "crypto/"+pkg)
ce.Fun = ast.NewIdent("hmac.New")
ce.Args = append([]ast.Expr{ast.NewIdent(pkg + ".New")}, ce.Args...)
fixed = true
})
return
}
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