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-rw-r--r--sal/rtl/random.cxx240
1 files changed, 6 insertions, 234 deletions
diff --git a/sal/rtl/random.cxx b/sal/rtl/random.cxx
index 418358b22e22..8420d4ca8049 100644
--- a/sal/rtl/random.cxx
+++ b/sal/rtl/random.cxx
@@ -19,246 +19,25 @@
#include <sal/config.h>
-#include <cmath>
+#include <cstdio>
+#include <cstdlib>
#include <sal/types.h>
-#include <o3tl/temporary.hxx>
-#include <osl/thread.h>
-#include <osl/thread.hxx>
-#include <osl/time.h>
#include <rtl/alloc.h>
-#include <rtl/digest.h>
#include <rtl/random.h>
#include <oslrandom.h>
-#define RTL_RANDOM_RNG_1(a) ((a) * 16807L)
-#define RTL_RANDOM_RNG_2(a) ((a) * 65539L)
-
-#define RTL_RANDOM_RNG(x, y, z) \
-{ \
- (x) = 170 * ((x) % 178) - 63 * ((x) / 178); \
- if ((x) < 0) (x) += 30328; \
- \
- (y) = 171 * ((y) % 177) - 2 * ((y) / 177); \
- if ((y) < 0) (y) += 30269; \
- \
- (z) = 172 * ((z) % 176) - 35 * ((z) / 176); \
- if ((z) < 0) (z) += 30307; \
-}
-
-namespace {
-
-struct RandomData_Impl
-{
- sal_Int16 m_nX;
- sal_Int16 m_nY;
- sal_Int16 m_nZ;
-};
-
-}
-
-static double data (RandomData_Impl *pImpl);
-
-#define RTL_RANDOM_DIGEST rtl_Digest_AlgorithmMD5
-#define RTL_RANDOM_SIZE_DIGEST RTL_DIGEST_LENGTH_MD5
-#define RTL_RANDOM_SIZE_POOL 1023
-
namespace {
struct RandomPool_Impl
{
- rtlDigest m_hDigest;
- sal_uInt8 m_pDigest[RTL_RANDOM_SIZE_DIGEST];
- sal_uInt8 m_pData[RTL_RANDOM_SIZE_POOL + 1];
- sal_uInt32 m_nData;
- sal_uInt32 m_nIndex;
- sal_uInt32 m_nCount;
};
}
-static bool initPool(RandomPool_Impl *pImpl);
-
-static void seedPool(
- RandomPool_Impl *pImpl, const sal_uInt8 *pBuffer, sal_Size nBufLen);
-
-static void readPool(
- RandomPool_Impl *pImpl, sal_uInt8 *pBuffer, sal_Size nBufLen);
-
-static double data(RandomData_Impl *pImpl)
-{
- double random;
-
- RTL_RANDOM_RNG (pImpl->m_nX, pImpl->m_nY, pImpl->m_nZ);
- random = ((static_cast<double>(pImpl->m_nX) / 30328.0) +
- (static_cast<double>(pImpl->m_nY) / 30269.0) +
- (static_cast<double>(pImpl->m_nZ) / 30307.0) );
-
- return std::modf(random, &o3tl::temporary(double()));
-}
-
-static bool initPool(RandomPool_Impl *pImpl)
-{
- pImpl->m_hDigest = rtl_digest_create(RTL_RANDOM_DIGEST);
- if (pImpl->m_hDigest)
- {
- oslThreadIdentifier tid;
- TimeValue tv;
- RandomData_Impl rd;
- double seed;
-
- /* The use of uninitialized stack variables as a way to
- * enhance the entropy of the random pool triggers
- * memory checkers like purify and valgrind.
- */
-
- /*
- seedPool (pImpl, (sal_uInt8*)&tid, sizeof(tid));
- seedPool (pImpl, (sal_uInt8*)&tv, sizeof(tv));
- seedPool (pImpl, (sal_uInt8*)&rd, sizeof(rd));
- */
-
- tid = osl::Thread::getCurrentIdentifier();
- tid = RTL_RANDOM_RNG_2(RTL_RANDOM_RNG_1(tid));
- seedPool (pImpl, reinterpret_cast< sal_uInt8* >(&tid), sizeof(tid));
-
- osl_getSystemTime (&tv);
- tv.Seconds = RTL_RANDOM_RNG_2(tv.Seconds);
- tv.Nanosec = RTL_RANDOM_RNG_2(tv.Nanosec);
- seedPool (pImpl, reinterpret_cast< sal_uInt8* >(&tv), sizeof(tv));
-
- rd.m_nX = static_cast<sal_Int16>(((tid >> 1) << 1) + 1);
- rd.m_nY = static_cast<sal_Int16>(((tv.Seconds >> 1) << 1) + 1);
- rd.m_nZ = static_cast<sal_Int16>(((tv.Nanosec >> 1) << 1) + 1);
- seedPool (pImpl, reinterpret_cast< sal_uInt8* >(&rd), sizeof(rd));
-
- while (pImpl->m_nData < RTL_RANDOM_SIZE_POOL)
- {
- seed = data (&rd);
- seedPool (pImpl, reinterpret_cast< sal_uInt8* >(&seed), sizeof(seed));
- }
- return true;
- }
- return false;
-}
-
-static void seedPool(
- RandomPool_Impl *pImpl, const sal_uInt8 *pBuffer, sal_Size nBufLen)
-{
- sal_Size i;
- sal_sSize j, k;
-
- for (i = 0; i < nBufLen; i += RTL_RANDOM_SIZE_DIGEST)
- {
- j = nBufLen - i;
- if (j > RTL_RANDOM_SIZE_DIGEST)
- j = RTL_RANDOM_SIZE_DIGEST;
-
- rtl_digest_update(
- pImpl->m_hDigest, pImpl->m_pDigest, RTL_RANDOM_SIZE_DIGEST);
-
- k = (pImpl->m_nIndex + j) - RTL_RANDOM_SIZE_POOL;
- if (k > 0)
- {
- rtl_digest_update(
- pImpl->m_hDigest, &(pImpl->m_pData[pImpl->m_nIndex]), j - k);
- rtl_digest_update(
- pImpl->m_hDigest, &(pImpl->m_pData[0]), k);
- }
- else
- {
- rtl_digest_update(
- pImpl->m_hDigest, &(pImpl->m_pData[pImpl->m_nIndex]), j);
- }
-
- rtl_digest_update(pImpl->m_hDigest, pBuffer, j);
- pBuffer += j;
-
- rtl_digest_get(
- pImpl->m_hDigest, pImpl->m_pDigest, RTL_RANDOM_SIZE_DIGEST);
- for (k = 0; k < j; k++)
- {
- pImpl->m_pData[pImpl->m_nIndex++] ^= pImpl->m_pDigest[k];
- if (pImpl->m_nIndex >= RTL_RANDOM_SIZE_POOL)
- {
- pImpl->m_nData = RTL_RANDOM_SIZE_POOL;
- pImpl->m_nIndex = 0;
- }
- }
- }
-
- if (pImpl->m_nIndex > pImpl->m_nData)
- pImpl->m_nData = pImpl->m_nIndex;
-}
-
-static void readPool (
- RandomPool_Impl *pImpl, sal_uInt8 *pBuffer, sal_Size nBufLen)
-{
- sal_Int32 j, k;
-
- while (nBufLen > 0)
- {
- j = nBufLen;
- if (j > RTL_RANDOM_SIZE_DIGEST/2)
- j = RTL_RANDOM_SIZE_DIGEST/2;
- nBufLen -= j;
-
- rtl_digest_update(
- pImpl->m_hDigest,
- &(pImpl->m_pDigest[RTL_RANDOM_SIZE_DIGEST/2]),
- RTL_RANDOM_SIZE_DIGEST/2);
-
- k = (pImpl->m_nIndex + j) - pImpl->m_nData;
- if (k > 0)
- {
- rtl_digest_update(
- pImpl->m_hDigest, &(pImpl->m_pData[pImpl->m_nIndex]), j - k);
- rtl_digest_update(
- pImpl->m_hDigest, &(pImpl->m_pData[0]), k);
- }
- else
- {
- rtl_digest_update(
- pImpl->m_hDigest, &(pImpl->m_pData[pImpl->m_nIndex]), j);
- }
-
- rtl_digest_get(
- pImpl->m_hDigest, pImpl->m_pDigest, RTL_RANDOM_SIZE_DIGEST);
- for (k = 0; k < j; k++)
- {
- if (pImpl->m_nIndex >= pImpl->m_nData)
- pImpl->m_nIndex = 0;
-
- pImpl->m_pData[pImpl->m_nIndex++] ^= pImpl->m_pDigest[k];
- *pBuffer++ = pImpl->m_pDigest[k + RTL_RANDOM_SIZE_DIGEST/2];
- }
- }
-
- pImpl->m_nCount++;
- rtl_digest_update(
- pImpl->m_hDigest, &(pImpl->m_nCount), sizeof(pImpl->m_nCount));
- rtl_digest_update(
- pImpl->m_hDigest, pImpl->m_pDigest, RTL_RANDOM_SIZE_DIGEST);
- rtl_digest_get(
- pImpl->m_hDigest, pImpl->m_pDigest, RTL_RANDOM_SIZE_DIGEST);
-}
-
rtlRandomPool SAL_CALL rtl_random_createPool() SAL_THROW_EXTERN_C()
{
- /* try to get system random number, if it fail fall back on own pool */
RandomPool_Impl *pImpl = static_cast< RandomPool_Impl* >(rtl_allocateZeroMemory(sizeof(RandomPool_Impl)));
- if (pImpl)
- {
- char sanity[4];
- if (!osl_get_system_random_data(sanity, 4))
- {
- if (!initPool(pImpl))
- {
- rtl_freeZeroMemory(pImpl, sizeof(RandomPool_Impl));
- pImpl = nullptr;
- }
- }
- }
return static_cast< rtlRandomPool >(pImpl);
}
@@ -267,15 +46,12 @@ void SAL_CALL rtl_random_destroyPool(rtlRandomPool Pool) SAL_THROW_EXTERN_C()
RandomPool_Impl *pImpl = static_cast< RandomPool_Impl* >(Pool);
if (pImpl)
{
- if (pImpl->m_hDigest)
- rtl_digest_destroy(pImpl->m_hDigest);
-
rtl_freeZeroMemory (pImpl, sizeof(RandomPool_Impl));
}
}
rtlRandomError SAL_CALL rtl_random_addBytes(
- rtlRandomPool Pool, const void *Buffer, sal_Size Bytes) SAL_THROW_EXTERN_C()
+ rtlRandomPool Pool, const void *Buffer, sal_Size /*Bytes*/) SAL_THROW_EXTERN_C()
{
RandomPool_Impl *pImpl = static_cast< RandomPool_Impl* >(Pool);
const sal_uInt8 *pBuffer = static_cast< const sal_uInt8* >(Buffer);
@@ -283,9 +59,6 @@ rtlRandomError SAL_CALL rtl_random_addBytes(
if (!pImpl || !pBuffer)
return rtl_Random_E_Argument;
- if (pImpl->m_hDigest)
- seedPool (pImpl, pBuffer, Bytes);
-
return rtl_Random_E_None;
}
@@ -298,11 +71,10 @@ rtlRandomError SAL_CALL rtl_random_getBytes (
if (!pImpl || !pBuffer)
return rtl_Random_E_Argument;
- if (pImpl->m_hDigest || !osl_get_system_random_data(static_cast< char* >(Buffer), Bytes))
+ if (!osl_get_system_random_data(static_cast<char*>(Buffer), Bytes))
{
- if (!pImpl->m_hDigest && !initPool(pImpl))
- return rtl_Random_E_Unknown;
- readPool(pImpl, pBuffer, Bytes);
+ ::std::fprintf(stderr, "rtl_random_getBytes(): cannot read random device, aborting.\n");
+ ::std::abort();
}
return rtl_Random_E_None;
}
generated by cgit (git 2.34.1) at 2024-12-26 22:12:54 +0000