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jeffdecola / my-go-tools

git clone https://source.community/jeffdecola/my-go-tools.git

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/cryptography-tools/md5-hash-file/ (develop)

↑ /cryptography-tools

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📄 md5-hash-file_test.go

📄 run.sh

📄 testfile.txt

md5-hash-file tool

`md5-hash-file` _is a useful tool for getting an md5 hash (fingerprint) from an input file using the standard `crypto/md5` package.

I also added a flag to read in your .ssh/id_rsa.pub key to get your ssh md5 fingerprint._

Table of Contents,

- OVERVIEW[1]

1: OVERVIEW

- PREREQUISITES[1]

- RUN[2]

- TEST[3]

- INSTALL[4]

- USAGE[5]

- -h[6]

- -v[7]

- -ssh[8]

- -debug[9]

Documentation and references,

- Refer to

md5-hash-from-file[1] example in `my-go-examples` * This repos github webpage[2] _built with concourse[3]_

1: md5-hash-from-file

2: github webpage

3: concourse

OVERVIEW

In a nutshell, the guts of the code is,

plainTextBytes := []byte(plainText)

// HASH
md5HashByte := md5.Sum(plainTextBytes)

// CONVERT TO STRING
md5Hash := hex.EncodeToString(md5HashByte[:])

PREREQUISITES

I used the following language,

- go[1]

1: go

You will need the following go packages,

go get -u -v github.com/sirupsen/logrus

RUN

The following steps are located in run.sh[1].

1: run.sh

To run md5-hash-file.go[1] from the command line,

1: md5-hash-file.go

go run . testfile.txt
go run md5-hash-file.go testfile.txt
go run md5-hash-file.go -debug testfile.txt

If you run on testfile.txt your md5 hash shall be,

950dc9055bc2eb9b1f143e92d7bee6c4

You may also use the -ssh flag to read in a public ssh key file,

go run . -ssh ~/.ssh/id_rsa.pub
go run md5-hash-file.go -ssh ~/.ssh/id_rsa.pub
go run md5-hash-file.go -ssh -debug ~/.ssh/id_rsa.pub

Its nice because you can check you have the right fingerprint at github.com/settings/keys[1].

1: github.com/settings/keys

You can also run the unix command to check your md5,

ssh-keygen -l -E md5 -f ~/.ssh/id_rsa.pub

TEST

The following steps are located in unit-tests.sh[1].

1: unit-tests.sh

To create `_test` files,

gotests -w -all md5-hash-file.go

To unit test the code,

go test -cover ./... | tee test/test_coverage.txt
cat test/test_coverage.txt

INSTALL

Will place an executable in your go bin,

go install md5-hash-file.go

USAGE

md5-hash-file {-h|-v|-debug|-ssh} [FILENAME]

-h

Help,

md5-hash-file -h

-v

Version,

md5-hash-file -v

-ssh

Check your public ssh file,

md5-hash-file -ssh ~/.ssh/id_rsa.pub

-debug

md5-hash-file -debug testfile.txt

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