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tor: use string comparison to check min supported version

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The current method would not allow version strings like 0.4.0.5 since it
would check every number of the version string individually.
This commit is contained in:
Wilmer Paulino 2019-05-03 11:22:05 -07:00
parent 1acd38e48c
commit 4eb9ff2abf
No known key found for this signature in database
GPG Key ID: 6DF57B9F9514972F
2 changed files with 18 additions and 14 deletions
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22
tor/controller.go
View File

@ -325,7 +325,6 @@ func computeHMAC256(key, message []byte) []byte {
func supportsV3(version string) error {
// We'll split the minimum Tor version that's supported and the given
// version in order to individually compare each number.
requiredParts := strings.Split(MinTorVersion, ".")
parts := strings.Split(version, ".")
if len(parts) != 4 {
return errors.New("version string is not of the format " +
@ -338,22 +337,19 @@ func supportsV3(version string) error {
build := strings.Split(parts[len(parts)-1], "-")
parts[len(parts)-1] = build[0]
// Convert them each number from its string representation to integers
// and check that they respect the minimum version.
for i := range parts {
n, err := strconv.Atoi(parts[i])
if err != nil {
// Ensure that each part of the version string corresponds to a number.
for _, part := range parts {
if _, err := strconv.Atoi(part); err != nil {
return err
}
requiredN, err := strconv.Atoi(requiredParts[i])
if err != nil {
return err
}
if n < requiredN {
return fmt.Errorf("version %v below minimum version "+
"supported %v", version, MinTorVersion)
}
// Once we've determined we have a proper version string of the format
// major.minor.revision.build, we can just do a string comparison to
// determine if it satisfies the minimum version supported.
if version < MinTorVersion {
return fmt.Errorf("version %v below minimum version supported "+
"%v", version, MinTorVersion)
}
return nil

8
tor/controller_test.go
View File

@ -28,6 +28,10 @@ func TestParseTorVersion(t *testing.T) {
version: "0.4.3.6",
valid: true,
},
{
version: "0.4.0.5",
valid: true,
},
{
version: "1.3.3.6",
valid: true,
@ -56,6 +60,10 @@ func TestParseTorVersion(t *testing.T) {
version: "0.1.3.6",
valid: false,
},
{
version: "0.0.6.3",
valid: false,
},
}
for i, test := range tests {