Merge pull request #4 from scrambledeggs/image-module

Image module

README.md

@@ -1,6 +1,4 @@
 # booky-go-common
-Booky common functions in Go
-
 ![Booky Logo](https://user-images.githubusercontent.com/96253/56195205-17e08980-6067-11e9-9488-d0dcd80b5ebf.png)
 
 # Description
@@ -10,10 +8,32 @@ Contains common functions that can be used by other booky go modules
 Data is encrypted using `AES` given a passphrase that is hashed using `sha256`
 
 Usage:
-- Encrypt(data, passphrase) - Returns utf-8 encrypted string
-- EncryptB64(data, passphrase) - Returns base64 encrypted string
-- Decrypt(ciphertext, passphrase) - Decrypts data that was encrypted in the same module in
-- DecryptB64(ciphertext, passphrase) - Decrypts data encoded in b64
+- `Encrypt(data, passphrase)` - Returns utf-8 encrypted string
+- `EncryptB64(data, passphrase)` - Returns base64 encrypted string
+- `Decrypt(ciphertext, passphrase)` - Decrypts data in byte mode
+- `DecryptB64(ciphertext, passphrase)` - Decrypts data encoded in b64
+
+Encrypting a string:
+- Run `go run runnables/encryption/main.go <string> <key>` in order to get encrypted key. Key should be at least 12 in length.
 
 # [Module] config/
 Used to load environment variables given a valid environment, config file, and target data
+
+Usage:
+- `New(application_environment, config_map)` - *Required.* Reads through config file.
+	- Parameters:
+		- **application_environment** - Defaults to **development**. Accepts **development**, **staging**, **test**, and **production** values only.
+		- **config_map**- (map[string]string) String array which contains config keys to set that will be set to become ENV variables. Stored in the format of **[ENV_VARIABLE_NAME] = [config-key]** (key-value). Encrypted data should be enclosed in **ENC()** (E.g. **config-key: ENC(encrypted-data)**) to flag it for decryption.
+- `ApplyEnvConfig()`- *Required.* Sets environment variables based on config read.
+- `SetConfig(configFile, configFilePath, configFileType)` - *Optional.* Sets config file name and path. Defaults to **./config.yml**
+- `SetCipherPass(passphrase)` - *Required when config contains encrypted keys.* Provide passphrase for the encrypted data
+
+# [Module] photo/
+Generates Booky's Image URL. Module is named `photo` as to not override go's `image` package
+
+Usage: FormatImageURL(ID int, assetType string, filename string, extra ...string)
+ 	- ID - ID of entity.
+	- assetType - Type of entity (e.g. 'offers' or 'brands')
+	- filename - Image filename
+	- extra - Accepts up to two optional parameters. Sets imageSize(default:`original`) and imageType(default:`photo`).
+	- Sample Output: "https://assets1.phonebooky.com/brands/photos/000/000/020/original/sample.jpg"

config/config.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"log"
 	"os"
+	"regexp"
 	"strings"
 
 	enc "github.com/scrambledeggs/booky-go-common/encryption"
@@ -94,7 +95,8 @@ func (c *config) setKeyVarEnv(key string, val string) error {
 	finalVal := val
 
 	// Handle encrypted values
-	if strings.HasPrefix(val, "ENC(") && strings.HasSuffix(val, ")") {
+	isEncrypted, _ := regexp.MatchString(`^ENC(.*)$`, val)
+	if isEncrypted {
 		trimmed := strings.TrimRight(strings.TrimLeft(val, "ENC("), ")")
 		temp, err := enc.DecryptB64(trimmed, *c.cipherpass)
 		if err != nil {

config/go.mod

@@ -0,0 +1,9 @@
+module github.com/scrambledeggs/booky-go-common/config
+
+go 1.12
+
+require (
+	github.com/scrambledeggs/booky-go-common/encryption v0.0.0-20190913074022-cfd0ef746a40
+	github.com/spf13/viper v1.4.0
+	github.com/stretchr/testify v1.4.0
+)

config/go.sum

@@ -0,0 +1,138 @@
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+golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
+golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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+google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
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+google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.21.0/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
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+gopkg.in/resty.v1 v1.12.0/go.mod h1:mDo4pnntr5jdWRML875a/NmxYqAlA73dVijT2AXvQQo=
+gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

encryption/encryption.go

@@ -5,12 +5,17 @@ import (
 	"crypto/cipher"
 	"crypto/sha256"
 	b64 "encoding/base64"
+	"errors"
 	"io"
 	"strings"
 )
 
 // Encrypt data using AES
 func Encrypt(data []byte, passphrase string) ([]byte, error) {
+	if len(passphrase) < 12 {
+		return data, errors.New("Passphrase should be at least 12 characters long.")
+	}
+
 	gcm := setupCipher(data, passphrase)
 
 	nonce := make([]byte, gcm.NonceSize())
@@ -25,6 +30,10 @@ func Encrypt(data []byte, passphrase string) ([]byte, error) {
 
 // Encrypt data using AES and encode to B64
 func EncryptB64(data string, passphrase string) (string, error) {
+	if len(passphrase) < 12 {
+		return data, errors.New("Passphrase should be at least 12 characters long.")
+	}
+
 	ciphertext, err := Encrypt([]byte(data), passphrase)
 	if err != nil {
 		return "", err

encryption/encryption_test.go

@@ -11,15 +11,21 @@ func TestEncryption(t *testing.T) {
 	passphrase := "some-secure-passphrase"
 
 	// Normal string test
-	ciphertext, err := Encrypt([]byte(data), passphrase)
+	ciphertext, err := Encrypt([]byte(data), "shortpass")
+	assert.Equal(t, err.Error(), "Passphrase should be at least 12 characters long.")
+
+	ciphertext, err = Encrypt([]byte(data), passphrase)
 	assert.Nil(t, err)
 
 	plaintext, err := Decrypt(ciphertext, passphrase)
 	assert.Nil(t, err)
 	assert.Equal(t, data, string(plaintext))
 
 	// B64 Test
-	ciphertextB64, err := EncryptB64(data, passphrase)
+	ciphertextB64, err := EncryptB64(data, "shortpass")
+	assert.Equal(t, err.Error(), "Passphrase should be at least 12 characters long.")
+
+	ciphertextB64, err = EncryptB64(data, passphrase)
 	assert.Nil(t, err)
 
 	plaintext, err = DecryptB64(ciphertextB64, passphrase)

encryption/go.mod

@@ -0,0 +1,5 @@
+module github.com/scrambledeggs/booky-go-common/encryption
+
+go 1.12
+
+require github.com/stretchr/testify v1.4.0

encryption/go.sum

@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

go.mod

@@ -3,6 +3,12 @@ module github.com/scrambledeggs/booky-go-common
 go 1.12
 
 require (
+	github.com/scrambledeggs/booky-go-common/config v0.0.0 // indirect
+	github.com/scrambledeggs/booky-go-common/encryption v0.0.0-20190913074022-cfd0ef746a40
 	github.com/spf13/viper v1.4.0
 	github.com/stretchr/testify v1.4.0
 )
+
+replace github.com/scrambledeggs/booky-go-common/config v0.0.0 => ./config
+
+replace github.com/scrambledeggs/booky-go-common/encryption v0.0.0 => ./encryption