initial import of debian version from mentors0.6.1

1 files changed, 257 insertions, 0 deletions

diff --git a/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c b/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c
new file mode 100644
index 0000000..0ffcc2e
--- /dev/null
+++ b/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c
@@ -0,0 +1,257 @@
+
+#include <sys/types.h>
+#ifndef _WIN32
+# include <sys/stat.h>
+# include <sys/time.h>
+#endif
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#ifndef _WIN32
+# include <unistd.h>
+#endif
+
+#include "randombytes.h"
+#include "randombytes_sysrandom.h"
+#include "utils.h"
+
+#ifdef _WIN32
+# include <windows.h>
+# define RtlGenRandom SystemFunction036
+# if defined(__cplusplus)
+extern "C"
+# endif
+BOOLEAN NTAPI RtlGenRandom(PVOID RandomBuffer, ULONG RandomBufferLength);
+# pragma comment(lib, "advapi32.lib")
+#endif
+
+#ifdef __OpenBSD__
+
+uint32_t
+randombytes_sysrandom(void)
+{
+    return arc4random();
+}
+
+void
+randombytes_sysrandom_stir(void)
+{
+}
+
+uint32_t
+randombytes_sysrandom_uniform(const uint32_t upper_bound)
+{
+    return arc4random_uniform(upper_bound);
+}
+
+void
+randombytes_sysrandom_buf(void * const buf, const size_t size)
+{
+    return arc4random_buf(buf, size);
+}
+
+int
+randombytes_sysrandom_close(void)
+{
+    return 0;
+}
+
+#else /* __OpenBSD__ */
+
+typedef struct SysRandom_ {
+    int        random_data_source_fd;
+    int        initialized;
+} SysRandom;
+
+static SysRandom stream = {
+    _SODIUM_C99(.random_data_source_fd =) -1,
+    _SODIUM_C99(.initialized =) 0
+};
+
+#ifndef _WIN32
+static ssize_t
+safe_read(const int fd, void * const buf_, size_t count)
+{
+    unsigned char *buf = (unsigned char *) buf_;
+    ssize_t        readnb;
+
+    assert(count > (size_t) 0U);
+    do {
+        while ((readnb = read(fd, buf, count)) < (ssize_t) 0 &&
+               errno == EINTR);
+        if (readnb < (ssize_t) 0) {
+            return readnb;
+        }
+        if (readnb == (ssize_t) 0) {
+            break;
+        }
+        count -= (size_t) readnb;
+        buf += readnb;
+    } while (count > (ssize_t) 0);
+
+    return (ssize_t) (buf - (unsigned char *) buf_);
+}
+#endif
+
+#ifndef _WIN32
+static int
+randombytes_sysrandom_random_dev_open(void)
+{
+    struct stat        st;
+    static const char *devices[] = {
+# ifndef USE_BLOCKING_RANDOM
+        "/dev/urandom",
+# endif
+        "/dev/random", NULL
+    };
+    const char **      device = devices;
+    int                fd;
+
+    do {
+        if ((fd = open(*device, O_RDONLY)) != -1) {
+            if (fstat(fd, &st) == 0 && S_ISCHR(st.st_mode)) {
+                return fd;
+            }
+            (void) close(fd);
+        }
+        device++;
+    } while (*device != NULL);
+
+    return -1;
+}
+
+static void
+randombytes_sysrandom_init(void)
+{
+    const int errno_save = errno;
+
+    if ((stream.random_data_source_fd =
+         randombytes_sysrandom_random_dev_open()) == -1) {
+        abort();
+    }
+    errno = errno_save;
+}
+
+#else /* _WIN32 */
+
+static void
+randombytes_sysrandom_init(void)
+{
+}
+#endif
+
+void
+randombytes_sysrandom_stir(void)
+{
+    if (stream.initialized == 0) {
+        randombytes_sysrandom_init();
+        stream.initialized = 1;
+    }
+}
+
+static void
+randombytes_sysrandom_stir_if_needed(void)
+{
+    if (stream.initialized == 0) {
+        randombytes_sysrandom_stir();
+    }
+}
+
+int
+randombytes_sysrandom_close(void)
+{
+    int ret = -1;
+
+#ifndef _WIN32
+    if (stream.random_data_source_fd != -1 &&
+        close(stream.random_data_source_fd) == 0) {
+        stream.random_data_source_fd = -1;
+        stream.initialized = 0;
+        ret = 0;
+    }
+#else /* _WIN32 */
+    if (stream.initialized != 0) {
+        stream.initialized = 0;
+        ret = 0;
+    }
+#endif
+    return ret;
+}
+
+uint32_t
+randombytes_sysrandom(void)
+{
+    uint32_t r;
+
+    randombytes_sysrandom_buf(&r, sizeof r);
+
+    return r;
+}
+
+void
+randombytes_sysrandom_buf(void * const buf, const size_t size)
+{
+    randombytes_sysrandom_stir_if_needed();
+#ifdef ULONG_LONG_MAX
+    /* coverity[result_independent_of_operands] */
+    assert(size <= ULONG_LONG_MAX);
+#endif
+#ifndef _WIN32
+    if (safe_read(stream.random_data_source_fd, buf, size) != (ssize_t) size) {
+        abort();
+    }
+#else
+    if (size > 0xffffffff) {
+        abort();
+    }
+    if (! RtlGenRandom((PVOID) buf, (ULONG) size)) {
+        abort();
+    }
+#endif
+}
+
+/*
+ * randombytes_sysrandom_uniform() derives from OpenBSD's arc4random_uniform()
+ * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
+ */
+
+uint32_t
+randombytes_sysrandom_uniform(const uint32_t upper_bound)
+{
+    uint32_t min;
+    uint32_t r;
+
+    if (upper_bound < 2) {
+        return 0;
+    }
+    min = (uint32_t) (-upper_bound % upper_bound);
+    for (;;) {
+        r = randombytes_sysrandom();
+        if (r >= min) {
+            break;
+        }
+    }
+    return r % upper_bound;
+}
+
+#endif
+
+const char *
+randombytes_sysrandom_implementation_name(void)
+{
+    return "sysrandom";
+}
+
+struct randombytes_implementation randombytes_sysrandom_implementation = {
+    _SODIUM_C99(.implementation_name =) randombytes_sysrandom_implementation_name,
+    _SODIUM_C99(.random =) randombytes_sysrandom,
+    _SODIUM_C99(.stir =) randombytes_sysrandom_stir,
+    _SODIUM_C99(.uniform =) randombytes_sysrandom_uniform,
+    _SODIUM_C99(.buf =) randombytes_sysrandom_buf,
+    _SODIUM_C99(.close =) randombytes_sysrandom_close
+};