英文:
Golang Base64 encoded SHA256 digest of the user’s password
问题
我正在尝试完成Top Code Go Learning Challenges，以此作为学习Go语言的工具。我目前正在解决他们的Simple API Web Server problem。该问题的一部分要求你加密一个密码字符串，格式为"‘{SHA256}’ + Base64编码的用户密码的SHA256摘要"
我使用了以下代码来实现，但结果与提供的测试用例不匹配。
import (
"encoding/base64"
"crypto/sha256"
)
func encrtyptPasswords(password string) string {
h := sha256.New()
return "{SHA256}" +
string(base64.StdEncoding.EncodeToString(h.Sum([]byte(password))))
}
对于输入的abcd1234，它应该加密为：{SHA256}6c7nGrky_ehjM40Ivk3p3-OeoEm9r7NCzmWexUULaa4=
但我得到的结果是{SHA256}YWJjZDEyMzTjsMRCmPwcFJr79MiZb7kkJ65B5GSbk0yklZkbeFK4VQ==。我怀疑我使用的加密库有问题，但我不确定应该使用什么，因为这似乎是SHA256加密的标准库方法。
英文:
I am attempting to complete the Top Code Go Learning Challenges as a vehicle to learn go. I'm currently working on their Simple API Web Server problem. Part of that problem calls for you to encrypt a password string as such "‘{SHA256}’ + Base64 encoded SHA256 digest of the user’s password"
I've used the following code to do this, but the results don't match the test case provided.
import (
"encoding/base64"
"crypto/sha256"
)
func encrtyptPasswords(password string) string {
h := sha256.New()
return "{SHA256}" +
string(base64.StdEncoding.EncodeToString(h.Sum([]byte(password))))
}
For an input of abcd1234 it should encrypt to: {SHA256}6c7nGrky_ehjM40Ivk3p3-OeoEm9r7NCzmWexUULaa4=
But I get {SHA256}YWJjZDEyMzTjsMRCmPwcFJr79MiZb7kkJ65B5GSbk0yklZkbeFK4VQ== instead. I suspect I'm using the encryption libraries wrong, but I'm not sure what I should be using as this seems to be the standard library method of encryption to SHA256.
答案1
得分: 12
你误用了Sum方法。hash.Hash接口的文档明确说明了：
>Sum方法将当前哈希追加到b并返回结果切片。
（强调添加部分）
你需要将数据写入哈希并像这样使用h.Sum：
h.Write([]byte(password))
b := h.Sum(nil)
或者直接使用sha256.Sum256
h := sha256.Sum256([]byte(password))
Playground: http://play.golang.org/p/oFBePRQzhN.
英文:
You're misusing the Sum method. The docs for the hash.Hash interface clearly say that
>Sum appends the current hash to b and returns the resulting slice.
(Emphasis added.)
You need to either write the data to the hash and use h.Sum like this
h.Write([]byte(password))
b := h.Sum(nil)
or just use sha256.Sum256
h := sha256.Sum256([]byte(password))
Playground: http://play.golang.org/p/oFBePRQzhN.
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