diff options
Diffstat (limited to 'src/libs/3rdparty/botan/src/lib/rng/system_rng/system_rng.cpp')
| -rw-r--r-- | src/libs/3rdparty/botan/src/lib/rng/system_rng/system_rng.cpp | 285 |
1 files changed, 0 insertions, 285 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/rng/system_rng/system_rng.cpp b/src/libs/3rdparty/botan/src/lib/rng/system_rng/system_rng.cpp deleted file mode 100644 index ae027d0217..0000000000 --- a/src/libs/3rdparty/botan/src/lib/rng/system_rng/system_rng.cpp +++ /dev/null @@ -1,285 +0,0 @@ -/* -* System RNG -* (C) 2014,2015,2017,2018 Jack Lloyd -* -* Botan is released under the Simplified BSD License (see license.txt) -*/ - -#include <botan/system_rng.h> - -#if defined(BOTAN_TARGET_OS_HAS_RTLGENRANDOM) - #include <botan/dyn_load.h> - #define NOMINMAX 1 - #define _WINSOCKAPI_ // stop windows.h including winsock.h - #include <windows.h> - -#elif defined(BOTAN_TARGET_OS_HAS_CRYPTO_NG) - #include <bcrypt.h> - -#elif defined(BOTAN_TARGET_OS_HAS_ARC4RANDOM) - #include <stdlib.h> - -#elif defined(BOTAN_TARGET_OS_HAS_GETRANDOM) - #include <sys/random.h> - #include <errno.h> - -#elif defined(BOTAN_TARGET_OS_HAS_DEV_RANDOM) - #include <sys/types.h> - #include <sys/stat.h> - #include <fcntl.h> - #include <unistd.h> - #include <errno.h> -#endif - -namespace Botan { - -namespace { - -#if defined(BOTAN_TARGET_OS_HAS_RTLGENRANDOM) - -class System_RNG_Impl final : public RandomNumberGenerator - { - public: - System_RNG_Impl() : m_advapi("advapi32.dll") - { - // This throws if the function is not found - m_rtlgenrandom = m_advapi.resolve<RtlGenRandom_fptr>("SystemFunction036"); - } - - void randomize(uint8_t buf[], size_t len) override - { - bool success = m_rtlgenrandom(buf, ULONG(len)) == TRUE; - if(!success) - throw Exception("RtlGenRandom failed"); - } - - void add_entropy(const uint8_t[], size_t) override { /* ignored */ } - bool is_seeded() const override { return true; } - bool accepts_input() const override { return false; } - void clear() override { /* not possible */ } - std::string name() const override { return "RtlGenRandom"; } - private: - // Use type BYTE instead of BOOLEAN because of a naming conflict - // https://msdn.microsoft.com/en-us/library/windows/desktop/aa387694(v=vs.85).aspx - // https://msdn.microsoft.com/en-us/library/windows/desktop/aa383751(v=vs.85).aspx - using RtlGenRandom_fptr = BYTE (NTAPI *)(PVOID, ULONG); - - Dynamically_Loaded_Library m_advapi; - RtlGenRandom_fptr m_rtlgenrandom; - }; - -#elif defined(BOTAN_TARGET_OS_HAS_CRYPTO_NG) - -class System_RNG_Impl final : public RandomNumberGenerator - { - public: - System_RNG_Impl() - { - NTSTATUS ret = ::BCryptOpenAlgorithmProvider(&m_prov, - BCRYPT_RNG_ALGORITHM, - MS_PRIMITIVE_PROVIDER, 0); - if(ret != STATUS_SUCCESS) - throw Exception("System_RNG failed to acquire crypto provider"); - } - - ~System_RNG_Impl() - { - ::BCryptCloseAlgorithmProvider(m_prov, 0); - } - - void randomize(uint8_t buf[], size_t len) override - { - NTSTATUS ret = ::BCryptGenRandom(m_prov, static_cast<PUCHAR>(buf), static_cast<ULONG>(len), 0); - if(ret != STATUS_SUCCESS) - throw Exception("System_RNG call to BCryptGenRandom failed"); - } - - void add_entropy(const uint8_t in[], size_t length) override - { - /* - There is a flag BCRYPT_RNG_USE_ENTROPY_IN_BUFFER to provide - entropy inputs, but it is ignored in Windows 8 and later. - */ - } - - bool is_seeded() const override { return true; } - bool accepts_input() const override { return false; } - void clear() override { /* not possible */ } - std::string name() const override { return "crypto_ng"; } - private: - BCRYPT_ALG_HANDLE m_handle; - }; - -#elif defined(BOTAN_TARGET_OS_HAS_ARC4RANDOM) - -class System_RNG_Impl final : public RandomNumberGenerator - { - public: - // No constructor or destructor needed as no userland state maintained - - void randomize(uint8_t buf[], size_t len) override - { - ::arc4random_buf(buf, len); - } - - bool accepts_input() const override { return false; } - void add_entropy(const uint8_t[], size_t) override { /* ignored */ } - bool is_seeded() const override { return true; } - void clear() override { /* not possible */ } - std::string name() const override { return "arc4random"; } - }; - -#elif defined(BOTAN_TARGET_OS_HAS_GETRANDOM) - -class System_RNG_Impl final : public RandomNumberGenerator - { - public: - // No constructor or destructor needed as no userland state maintained - - void randomize(uint8_t buf[], size_t len) override - { - const unsigned int flags = 0; - - while(len > 0) - { - const ssize_t got = ::getrandom(buf, len, flags); - - if(got < 0) - { - if(errno == EINTR) - continue; - throw Exception("System_RNG getrandom failed error " + std::to_string(errno)); - } - - buf += got; - len -= got; - } - } - - bool accepts_input() const override { return false; } - void add_entropy(const uint8_t[], size_t) override { /* ignored */ } - bool is_seeded() const override { return true; } - void clear() override { /* not possible */ } - std::string name() const override { return "getrandom"; } - }; - - -#elif defined(BOTAN_TARGET_OS_HAS_DEV_RANDOM) - -// Read a random device - -class System_RNG_Impl final : public RandomNumberGenerator - { - public: - System_RNG_Impl() - { - #ifndef O_NOCTTY - #define O_NOCTTY 0 - #endif - - m_fd = ::open(BOTAN_SYSTEM_RNG_DEVICE, O_RDWR | O_NOCTTY); - - if(m_fd >= 0) - { - m_writable = true; - } - else - { - /* - Cannot open in read-write mode. Fall back to read-only, - calls to add_entropy will fail, but randomize will work - */ - m_fd = ::open(BOTAN_SYSTEM_RNG_DEVICE, O_RDONLY | O_NOCTTY); - m_writable = false; - } - - if(m_fd < 0) - throw Exception("System_RNG failed to open RNG device"); - } - - ~System_RNG_Impl() - { - ::close(m_fd); - m_fd = -1; - } - - void randomize(uint8_t buf[], size_t len) override; - void add_entropy(const uint8_t in[], size_t length) override; - bool is_seeded() const override { return true; } - bool accepts_input() const override { return m_writable; } - void clear() override { /* not possible */ } - std::string name() const override { return BOTAN_SYSTEM_RNG_DEVICE; } - private: - int m_fd; - bool m_writable; - }; - -void System_RNG_Impl::randomize(uint8_t buf[], size_t len) - { - while(len) - { - ssize_t got = ::read(m_fd, buf, len); - - if(got < 0) - { - if(errno == EINTR) - continue; - throw Exception("System_RNG read failed error " + std::to_string(errno)); - } - if(got == 0) - throw Exception("System_RNG EOF on device"); // ?!? - - buf += got; - len -= got; - } - } - -void System_RNG_Impl::add_entropy(const uint8_t input[], size_t len) - { - if(!m_writable) - return; - - while(len) - { - ssize_t got = ::write(m_fd, input, len); - - if(got < 0) - { - if(errno == EINTR) - continue; - - /* - * This is seen on OS X CI, despite the fact that the man page - * for Darwin urandom explicitly states that writing to it is - * supported, and write(2) does not document EPERM at all. - * But in any case EPERM seems indicative of a policy decision - * by the OS or sysadmin that additional entropy is not wanted - * in the system pool, so we accept that and return here, - * since there is no corrective action possible. - * - * In Linux EBADF or EPERM is returned if m_fd is not opened for - * writing. - */ - if(errno == EPERM || errno == EBADF) - return; - - // maybe just ignore any failure here and return? - throw Exception("System_RNG write failed error " + std::to_string(errno)); - } - - input += got; - len -= got; - } - } - -#endif - -} - -RandomNumberGenerator& system_rng() - { - static System_RNG_Impl g_system_rng; - return g_system_rng; - } - -} |