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192 lines
4.7 KiB
Diff
192 lines
4.7 KiB
Diff
--- a/src/crypto/random.c
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+++ b/src/crypto/random.c
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@@ -38,6 +38,8 @@
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#include "sha1.h"
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#include "random.h"
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+#define RANDOM_STAMPFILE "/var/run/.random_available"
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+
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#define POOL_WORDS 32
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#define POOL_WORDS_MASK (POOL_WORDS - 1)
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#define POOL_TAP1 26
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@@ -48,6 +50,8 @@
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#define EXTRACT_LEN 16
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#define MIN_READY_MARK 2
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+#ifndef CONFIG_NO_RANDOM_POOL
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+
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static u32 pool[POOL_WORDS];
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static unsigned int input_rotate = 0;
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static unsigned int pool_pos = 0;
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@@ -122,7 +126,7 @@ static void random_extract(u8 *out)
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}
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-void random_add_randomness(const void *buf, size_t len)
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+static void random_pool_add_randomness(const void *buf, size_t len)
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{
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struct os_time t;
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static unsigned int count = 0;
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@@ -191,16 +195,22 @@ int random_get_bytes(void *buf, size_t l
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int random_pool_ready(void)
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{
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#ifdef __linux__
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+ struct stat st;
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int fd;
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ssize_t res;
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+ if (stat(RANDOM_STAMPFILE, &st) == 0)
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+ return 1;
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+
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/*
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* Make sure that there is reasonable entropy available before allowing
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* some key derivation operations to proceed.
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*/
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- if (dummy_key_avail == sizeof(dummy_key))
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+ if (dummy_key_avail == sizeof(dummy_key)) {
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+ random_mark_pool_ready();
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return 1; /* Already initialized - good to continue */
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+ }
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/*
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* Try to fetch some more data from the kernel high quality
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@@ -232,8 +242,10 @@ int random_pool_ready(void)
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dummy_key_avail += res;
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close(fd);
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- if (dummy_key_avail == sizeof(dummy_key))
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+ if (dummy_key_avail == sizeof(dummy_key)) {
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+ random_mark_pool_ready();
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return 1;
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+ }
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wpa_printf(MSG_INFO, "random: Only %u/%u bytes of strong "
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"random data available from /dev/random",
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@@ -243,6 +255,7 @@ int random_pool_ready(void)
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total_collected + 10 * own_pool_ready > MIN_COLLECT_ENTROPY) {
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wpa_printf(MSG_INFO, "random: Allow operation to proceed "
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"based on internal entropy");
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+ random_mark_pool_ready();
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return 1;
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}
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@@ -258,9 +271,15 @@ int random_pool_ready(void)
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void random_mark_pool_ready(void)
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{
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+ int fd;
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+
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own_pool_ready++;
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wpa_printf(MSG_DEBUG, "random: Mark internal entropy pool to be "
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"ready (count=%u/%u)", own_pool_ready, MIN_READY_MARK);
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+
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+ fd = open(RANDOM_STAMPFILE, O_CREAT | O_WRONLY | O_EXCL | O_NOFOLLOW, 0600);
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+ if (fd >= 0)
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+ close(fd);
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}
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@@ -335,3 +354,22 @@ void random_deinit(void)
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random_close_fd();
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#endif /* __linux__ */
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}
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+
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+#endif /* CONFIG_NO_RANDOM_POOL */
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+
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+
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+void random_add_randomness(const void *buf, size_t len)
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+{
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+#ifdef __linux__
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+ int fd;
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+
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+ fd = open("/dev/random", O_RDWR);
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+ if (fd >= 0) {
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+ write(fd, buf, len);
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+ close(fd);
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+ }
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+#endif
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+#ifndef CONFIG_NO_RANDOM_POOL
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+ random_pool_add_randomness(buf, len);
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+#endif
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+}
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--- a/hostapd/Makefile
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+++ b/hostapd/Makefile
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@@ -698,11 +698,11 @@ endif
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ifdef CONFIG_NO_RANDOM_POOL
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CFLAGS += -DCONFIG_NO_RANDOM_POOL
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else
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-OBJS += ../src/crypto/random.o
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-HOBJS += ../src/crypto/random.o
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HOBJS += $(SHA1OBJS)
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HOBJS += ../src/crypto/md5.o
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endif
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+OBJS += ../src/crypto/random.o
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+HOBJS += ../src/crypto/random.o
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ifdef CONFIG_RADIUS_SERVER
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CFLAGS += -DRADIUS_SERVER
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--- a/wpa_supplicant/Makefile
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+++ b/wpa_supplicant/Makefile
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@@ -1101,9 +1101,8 @@ endif
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ifdef CONFIG_NO_RANDOM_POOL
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CFLAGS += -DCONFIG_NO_RANDOM_POOL
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-else
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-OBJS += ../src/crypto/random.o
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endif
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+OBJS += ../src/crypto/random.o
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ifdef CONFIG_CTRL_IFACE
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ifeq ($(CONFIG_CTRL_IFACE), y)
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--- a/wpa_supplicant/Android.mk
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+++ b/wpa_supplicant/Android.mk
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@@ -1109,9 +1109,8 @@ endif
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ifdef CONFIG_NO_RANDOM_POOL
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L_CFLAGS += -DCONFIG_NO_RANDOM_POOL
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-else
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-OBJS += src/crypto/random.c
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endif
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+OBJS += src/crypto/random.c
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ifdef CONFIG_CTRL_IFACE
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ifeq ($(CONFIG_CTRL_IFACE), y)
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--- a/hostapd/Android.mk
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+++ b/hostapd/Android.mk
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@@ -717,11 +717,11 @@ endif
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ifdef CONFIG_NO_RANDOM_POOL
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L_CFLAGS += -DCONFIG_NO_RANDOM_POOL
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else
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-OBJS += src/crypto/random.c
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-HOBJS += src/crypto/random.c
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HOBJS += $(SHA1OBJS)
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HOBJS += src/crypto/md5.c
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endif
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+OBJS += src/crypto/random.c
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+HOBJS += src/crypto/random.c
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ifdef CONFIG_RADIUS_SERVER
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L_CFLAGS += -DRADIUS_SERVER
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--- a/src/crypto/random.h
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+++ b/src/crypto/random.h
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@@ -18,17 +18,16 @@
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#ifdef CONFIG_NO_RANDOM_POOL
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#define random_init() do { } while (0)
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#define random_deinit() do { } while (0)
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-#define random_add_randomness(b, l) do { } while (0)
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#define random_get_bytes(b, l) os_get_random((b), (l))
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#define random_pool_ready() 1
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#define random_mark_pool_ready() do { } while (0)
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#else /* CONFIG_NO_RANDOM_POOL */
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void random_init(void);
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void random_deinit(void);
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-void random_add_randomness(const void *buf, size_t len);
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int random_get_bytes(void *buf, size_t len);
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int random_pool_ready(void);
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void random_mark_pool_ready(void);
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#endif /* CONFIG_NO_RANDOM_POOL */
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+void random_add_randomness(const void *buf, size_t len);
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#endif /* RANDOM_H */
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