Add final attribute to many classes

In some cases this can offer better optimization, via devirtualization.
And it lets the user know the class is not intended for derivation.

Some discussion in GH #402

11 files changed, 12 insertions, 12 deletions

diff --git a/src/lib/entropy/beos_stats/es_beos.h b/src/lib/entropy/beos_stats/es_beos.h
index db5824f6f..a5b90a607 100644
--- a/src/lib/entropy/beos_stats/es_beos.h
+++ b/src/lib/entropy/beos_stats/es_beos.h
@@ -15,7 +15,7 @@ namespace Botan {
 /**
 * BeOS Entropy Source
 */
-class BeOS_EntropySource : public Entropy_Source
+class BeOS_EntropySource final : public Entropy_Source
    {
    private:
       std::string name() const override { return "system_stats"; }
diff --git a/src/lib/entropy/cryptoapi_rng/es_capi.h b/src/lib/entropy/cryptoapi_rng/es_capi.h
index 9410e05b8..a43d5a7f2 100644
--- a/src/lib/entropy/cryptoapi_rng/es_capi.h
+++ b/src/lib/entropy/cryptoapi_rng/es_capi.h
@@ -16,7 +16,7 @@ namespace Botan {
 /**
 * Win32 CAPI Entropy Source
 */
-class Win32_CAPI_EntropySource : public Entropy_Source
+class Win32_CAPI_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "win32_cryptoapi"; }
diff --git a/src/lib/entropy/darwin_secrandom/darwin_secrandom.h b/src/lib/entropy/darwin_secrandom/darwin_secrandom.h
index 970cd7941..09cdc208d 100644
--- a/src/lib/entropy/darwin_secrandom/darwin_secrandom.h
+++ b/src/lib/entropy/darwin_secrandom/darwin_secrandom.h
@@ -15,7 +15,7 @@ namespace Botan {
 /**
 * Entropy source using SecRandomCopyBytes from Darwin's Security.framework
 */
-class Darwin_SecRandom : public Entropy_Source
+class Darwin_SecRandom final : public Entropy_Source
    {
    public:
       std::string name() const override { return "darwin_secrandom"; }
diff --git a/src/lib/entropy/dev_random/dev_random.h b/src/lib/entropy/dev_random/dev_random.h
index f634cf16c..1f29b2f64 100644
--- a/src/lib/entropy/dev_random/dev_random.h
+++ b/src/lib/entropy/dev_random/dev_random.h
@@ -17,7 +17,7 @@ namespace Botan {
 /**
 * Entropy source reading from kernel devices like /dev/random
 */
-class Device_EntropySource : public Entropy_Source
+class Device_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "dev_random"; }
diff --git a/src/lib/entropy/egd/es_egd.h b/src/lib/entropy/egd/es_egd.h
index e03fcf009..1a624713a 100644
--- a/src/lib/entropy/egd/es_egd.h
+++ b/src/lib/entropy/egd/es_egd.h
@@ -18,7 +18,7 @@ namespace Botan {
 /**
 * EGD Entropy Source
 */
-class EGD_EntropySource : public Entropy_Source
+class EGD_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "egd"; }
diff --git a/src/lib/entropy/hres_timer/hres_timer.h b/src/lib/entropy/hres_timer/hres_timer.h
index 93ced283a..d297a87b1 100644
--- a/src/lib/entropy/hres_timer/hres_timer.h
+++ b/src/lib/entropy/hres_timer/hres_timer.h
@@ -18,7 +18,7 @@ namespace Botan {
 * @note Any results from timers are marked as not contributing entropy
 * to the poll, as a local attacker could observe them directly.
 */
-class High_Resolution_Timestamp : public Entropy_Source
+class High_Resolution_Timestamp final : public Entropy_Source
    {
    public:
       std::string name() const override { return "timestamp"; }
diff --git a/src/lib/entropy/proc_walk/proc_walk.h b/src/lib/entropy/proc_walk/proc_walk.h
index b67f71111..f6db8185a 100644
--- a/src/lib/entropy/proc_walk/proc_walk.h
+++ b/src/lib/entropy/proc_walk/proc_walk.h
@@ -23,7 +23,7 @@ class File_Descriptor_Source
 /**
 * File Tree Walking Entropy Source
 */
-class ProcWalking_EntropySource : public Entropy_Source
+class ProcWalking_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "proc_walk"; }
diff --git a/src/lib/entropy/rdrand/rdrand.h b/src/lib/entropy/rdrand/rdrand.h
index 1fa928641..48d090775 100644
--- a/src/lib/entropy/rdrand/rdrand.h
+++ b/src/lib/entropy/rdrand/rdrand.h
@@ -16,7 +16,7 @@ namespace Botan {
 * Entropy source using the rdrand instruction first introduced on
 * Intel's Ivy Bridge architecture.
 */
-class Intel_Rdrand : public Entropy_Source
+class Intel_Rdrand final : public Entropy_Source
    {
    public:
       std::string name() const override { return "rdrand"; }
diff --git a/src/lib/entropy/rdseed/rdseed.h b/src/lib/entropy/rdseed/rdseed.h
index 0f39250a1..f86c32768 100644
--- a/src/lib/entropy/rdseed/rdseed.h
+++ b/src/lib/entropy/rdseed/rdseed.h
@@ -16,7 +16,7 @@ namespace Botan {
 * Entropy source using the rdseed instruction first introduced on
 * Intel's Broadwell architecture.
 */
-class Intel_Rdseed : public Entropy_Source
+class Intel_Rdseed final : public Entropy_Source
    {
    public:
       std::string name() const override { return "rdseed"; }
diff --git a/src/lib/entropy/unix_procs/unix_procs.h b/src/lib/entropy/unix_procs/unix_procs.h
index bc2fd87d1..e1749af5f 100644
--- a/src/lib/entropy/unix_procs/unix_procs.h
+++ b/src/lib/entropy/unix_procs/unix_procs.h
@@ -20,7 +20,7 @@ namespace Botan {
 * effective against local attackers as they can sample from the same
 * distribution.
 */
-class Unix_EntropySource : public Entropy_Source
+class Unix_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "unix_procs"; }
@@ -78,7 +78,7 @@ class Unix_EntropySource : public Entropy_Source
       secure_vector<byte> m_buf;
    };
 
-class UnixProcessInfo_EntropySource : public Entropy_Source
+class UnixProcessInfo_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "proc_info"; }
diff --git a/src/lib/entropy/win32_stats/es_win32.h b/src/lib/entropy/win32_stats/es_win32.h
index 958a79e19..5dc3f7f17 100644
--- a/src/lib/entropy/win32_stats/es_win32.h
+++ b/src/lib/entropy/win32_stats/es_win32.h
@@ -15,7 +15,7 @@ namespace Botan {
 /**
 * Win32 Entropy Source
 */
-class Win32_EntropySource : public Entropy_Source
+class Win32_EntropySource final : public Entropy_Source
    {
    public:
       std::string name() const override { return "system_stats"; }