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package util
import (
"crypto/rand"
"fmt"
"net/url"
"os"
"strings"
"time"
"github.com/jwijenbergh/eduvpn-common/internal/types"
)
func EnsureValidURL(s string) (string, error) {
parsedURL, parseErr := url.Parse(s)
if parseErr != nil {
return "", &types.WrappedErrorMessage{Message: fmt.Sprintf("failed parsing url: %s", s), Err: parseErr}
}
if parsedURL.Scheme == "" {
parsedURL.Scheme = "https"
}
return parsedURL.String(), nil
}
// Creates a random byteslice of `size`
func MakeRandomByteSlice(size int) ([]byte, error) {
byteSlice := make([]byte, size)
_, err := rand.Read(byteSlice)
if err != nil {
return nil, &types.WrappedErrorMessage{Message: "failed reading random", Err: err}
}
return byteSlice, nil
}
func GetCurrentTime() time.Time {
return time.Now()
}
func EnsureDirectory(directory string) error {
// Create with 700 permissions, read, write, execute only for the owner
mkdirErr := os.MkdirAll(directory, 0o700)
if mkdirErr != nil {
return &types.WrappedErrorMessage{Message: fmt.Sprintf("failed to create directory %s", directory), Err: mkdirErr}
}
return nil
}
// See https://github.com/eduvpn/documentation/blob/dc4d53c47dd7a69e95d6650eec408e16eaa814a2/SERVER_DISCOVERY_SKIP_WAYF.md
// URL encode for skipping where are you from (WAYF). Note that this right now is basically an alias to QueryEscape
func WAYFEncode(input string) string {
// QueryReplace already replaces a space with a +
// see https://go.dev/play/p/pOfrn-Wsq5
return url.QueryEscape(input)
}
// See https://github.com/eduvpn/documentation/blob/dc4d53c47dd7a69e95d6650eec408e16eaa814a2/SERVER_DISCOVERY_SKIP_WAYF.md
func ReplaceWAYF(authTemplate string, authURL string, orgID string) string {
if authTemplate == "" {
return authURL
}
// Replace authURL
authTemplate = strings.Replace(authTemplate, "@RETURN_TO@", WAYFEncode(authURL), 1)
// Replace ORG ID
authTemplate = strings.Replace(authTemplate, "@ORG_ID@", WAYFEncode(orgID), 1)
return authTemplate
}
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