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-rw-r--r--src/entropy/hres_timer/hres_timer.cpp70
-rw-r--r--src/entropy/hres_timer/hres_timer.h27
-rw-r--r--src/entropy/hres_timer/info.txt28
3 files changed, 125 insertions, 0 deletions
diff --git a/src/entropy/hres_timer/hres_timer.cpp b/src/entropy/hres_timer/hres_timer.cpp
new file mode 100644
index 000000000..74ea801c4
--- /dev/null
+++ b/src/entropy/hres_timer/hres_timer.cpp
@@ -0,0 +1,70 @@
+/*
+* High Resolution Timestamp Entropy Source
+* (C) 1999-2009 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/hres_timer.h>
+#include <botan/cpuid.h>
+#include <botan/time.h>
+
+#if defined(BOTAN_TARGET_OS_IS_WINDOWS)
+ #include <windows.h>
+#endif
+
+namespace Botan {
+
+/*
+* Get the timestamp
+*/
+void High_Resolution_Timestamp::poll(Entropy_Accumulator& accum)
+ {
+ // If Windows, grab the Performance Counter (usually TSC or PIT)
+#if defined(BOTAN_TARGET_OS_IS_WINDOWS)
+ LARGE_INTEGER tv;
+ ::QueryPerformanceCounter(&tv);
+ accum.add(tv.QuadPart, 0);
+#endif
+
+#if defined(BOTAN_USE_GCC_INLINE_ASM)
+
+ u64bit rtc = 0;
+
+#if defined(BOTAN_TARGET_ARCH_IS_IA32) || defined(BOTAN_TARGET_ARCH_IS_AMD64)
+ if(CPUID::has_rdtsc()) // not availble on all x86 CPUs
+ {
+ u32bit rtc_low = 0, rtc_high = 0;
+ asm volatile("rdtsc" : "=d" (rtc_high), "=a" (rtc_low));
+ rtc = (static_cast<u64bit>(rtc_high) << 32) | rtc_low;
+ }
+
+#elif defined(BOTAN_TARGET_ARCH_IS_PPC) || defined(BOTAN_TARGET_ARCH_IS_PPC64)
+ u32bit rtc_low = 0, rtc_high = 0;
+ asm volatile("mftbu %0; mftb %1" : "=r" (rtc_high), "=r" (rtc_low));
+ rtc = (static_cast<u64bit>(rtc_high) << 32) | rtc_low;
+
+#elif defined(BOTAN_TARGET_ARCH_IS_ALPHA)
+ asm volatile("rpcc %0" : "=r" (rtc));
+
+#elif defined(BOTAN_TARGET_ARCH_IS_SPARC64)
+ asm volatile("rd %%tick, %0" : "=r" (rtc));
+
+#elif defined(BOTAN_TARGET_ARCH_IS_IA64)
+ asm volatile("mov %0=ar.itc" : "=r" (rtc));
+
+#elif defined(BOTAN_TARGET_ARCH_IS_S390X)
+ asm volatile("stck 0(%0)" : : "a" (&rtc) : "memory", "cc");
+
+#elif defined(BOTAN_TARGET_ARCH_IS_HPPA)
+ asm volatile("mfctl 16,%0" : "=r" (rtc)); // 64-bit only?
+
+#endif
+
+ // Don't count the timestamp as contributing entropy
+ accum.add(rtc, 0);
+
+#endif
+ }
+
+}
diff --git a/src/entropy/hres_timer/hres_timer.h b/src/entropy/hres_timer/hres_timer.h
new file mode 100644
index 000000000..8dfbfc2d7
--- /dev/null
+++ b/src/entropy/hres_timer/hres_timer.h
@@ -0,0 +1,27 @@
+/*
+* High Resolution Timestamp Entropy Source
+* (C) 1999-2009 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_ENTROPY_SRC_HRES_TIMER_H__
+#define BOTAN_ENTROPY_SRC_HRES_TIMER_H__
+
+#include <botan/entropy_src.h>
+
+namespace Botan {
+
+/*
+* High Resolution Timestamp Source
+*/
+class BOTAN_DLL High_Resolution_Timestamp : public EntropySource
+ {
+ public:
+ std::string name() const { return "High Resolution Timestamp"; }
+ void poll(Entropy_Accumulator& accum);
+ };
+
+}
+
+#endif
diff --git a/src/entropy/hres_timer/info.txt b/src/entropy/hres_timer/info.txt
new file mode 100644
index 000000000..566ce4ef6
--- /dev/null
+++ b/src/entropy/hres_timer/info.txt
@@ -0,0 +1,28 @@
+define ENTROPY_SRC_HIGH_RESOLUTION_TIMER
+
+load_on asm_ok
+
+<cc>
+gcc
+icc
+</cc>
+
+<arch>
+
+# RDTSC: Pentium and up
+i586
+i686
+athlon
+pentium3
+pentium4
+pentium-m
+amd64
+
+ppc # PPC timebase register
+ppc64 # PPC timebase register
+alpha # rpcc
+sparc64 # %tick register
+ia64 # ar.itc
+s390x
+hppa
+</arch>