github.com/shohhei1126/hugo@v0.42.2-0.20180623210752-3d5928889ad7/tpl/crypto/crypto.go (about)

     1  // Copyright 2017 The Hugo Authors. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package crypto
    15  
    16  import (
    17  	"crypto/md5"
    18  	"crypto/sha1"
    19  	"crypto/sha256"
    20  	"encoding/hex"
    21  
    22  	"github.com/spf13/cast"
    23  )
    24  
    25  // New returns a new instance of the crypto-namespaced template functions.
    26  func New() *Namespace {
    27  	return &Namespace{}
    28  }
    29  
    30  // Namespace provides template functions for the "crypto" namespace.
    31  type Namespace struct{}
    32  
    33  // MD5 hashes the given input and returns its MD5 checksum.
    34  func (ns *Namespace) MD5(in interface{}) (string, error) {
    35  	conv, err := cast.ToStringE(in)
    36  	if err != nil {
    37  		return "", err
    38  	}
    39  
    40  	hash := md5.Sum([]byte(conv))
    41  	return hex.EncodeToString(hash[:]), nil
    42  }
    43  
    44  // SHA1 hashes the given input and returns its SHA1 checksum.
    45  func (ns *Namespace) SHA1(in interface{}) (string, error) {
    46  	conv, err := cast.ToStringE(in)
    47  	if err != nil {
    48  		return "", err
    49  	}
    50  
    51  	hash := sha1.Sum([]byte(conv))
    52  	return hex.EncodeToString(hash[:]), nil
    53  }
    54  
    55  // SHA256 hashes the given input and returns its SHA256 checksum.
    56  func (ns *Namespace) SHA256(in interface{}) (string, error) {
    57  	conv, err := cast.ToStringE(in)
    58  	if err != nil {
    59  		return "", err
    60  	}
    61  
    62  	hash := sha256.Sum256([]byte(conv))
    63  	return hex.EncodeToString(hash[:]), nil
    64  }