Root/package/hostapd/patches/700-random_pool_add_kernel.patch

1--- a/src/crypto/random.c
2+++ b/src/crypto/random.c
3@@ -38,6 +38,8 @@
4 #include "sha1.h"
5 #include "random.h"
6 
7+#define RANDOM_STAMPFILE "/var/run/.random_available"
8+
9 #define POOL_WORDS 32
10 #define POOL_WORDS_MASK (POOL_WORDS - 1)
11 #define POOL_TAP1 26
12@@ -48,6 +50,8 @@
13 #define EXTRACT_LEN 16
14 #define MIN_READY_MARK 2
15 
16+#ifndef CONFIG_NO_RANDOM_POOL
17+
18 static u32 pool[POOL_WORDS];
19 static unsigned int input_rotate = 0;
20 static unsigned int pool_pos = 0;
21@@ -122,7 +126,7 @@ static void random_extract(u8 *out)
22 }
23 
24 
25-void random_add_randomness(const void *buf, size_t len)
26+static void random_pool_add_randomness(const void *buf, size_t len)
27 {
28     struct os_time t;
29     static unsigned int count = 0;
30@@ -191,16 +195,22 @@ int random_get_bytes(void *buf, size_t l
31 int random_pool_ready(void)
32 {
33 #ifdef __linux__
34+ struct stat st;
35     int fd;
36     ssize_t res;
37 
38+ if (stat(RANDOM_STAMPFILE, &st) == 0)
39+ return 1;
40+
41     /*
42      * Make sure that there is reasonable entropy available before allowing
43      * some key derivation operations to proceed.
44      */
45 
46- if (dummy_key_avail == sizeof(dummy_key))
47+ if (dummy_key_avail == sizeof(dummy_key)) {
48+ random_mark_pool_ready();
49         return 1; /* Already initialized - good to continue */
50+ }
51 
52     /*
53      * Try to fetch some more data from the kernel high quality
54@@ -232,8 +242,10 @@ int random_pool_ready(void)
55     dummy_key_avail += res;
56     close(fd);
57 
58- if (dummy_key_avail == sizeof(dummy_key))
59+ if (dummy_key_avail == sizeof(dummy_key)) {
60+ random_mark_pool_ready();
61         return 1;
62+ }
63 
64     wpa_printf(MSG_INFO, "random: Only %u/%u bytes of strong "
65            "random data available from /dev/random",
66@@ -243,6 +255,7 @@ int random_pool_ready(void)
67         total_collected + 10 * own_pool_ready > MIN_COLLECT_ENTROPY) {
68         wpa_printf(MSG_INFO, "random: Allow operation to proceed "
69                "based on internal entropy");
70+ random_mark_pool_ready();
71         return 1;
72     }
73 
74@@ -258,9 +271,15 @@ int random_pool_ready(void)
75 
76 void random_mark_pool_ready(void)
77 {
78+ int fd;
79+
80     own_pool_ready++;
81     wpa_printf(MSG_DEBUG, "random: Mark internal entropy pool to be "
82            "ready (count=%u/%u)", own_pool_ready, MIN_READY_MARK);
83+
84+ fd = open(RANDOM_STAMPFILE, O_CREAT | O_WRONLY | O_EXCL | O_NOFOLLOW, 0600);
85+ if (fd >= 0)
86+ close(fd);
87 }
88 
89 
90@@ -335,3 +354,22 @@ void random_deinit(void)
91     random_close_fd();
92 #endif /* __linux__ */
93 }
94+
95+#endif /* CONFIG_NO_RANDOM_POOL */
96+
97+
98+void random_add_randomness(const void *buf, size_t len)
99+{
100+#ifdef __linux__
101+ int fd;
102+
103+ fd = open("/dev/random", O_RDWR);
104+ if (fd >= 0) {
105+ write(fd, buf, len);
106+ close(fd);
107+ }
108+#endif
109+#ifndef CONFIG_NO_RANDOM_POOL
110+ random_pool_add_randomness(buf, len);
111+#endif
112+}
113--- a/hostapd/Makefile
114+++ b/hostapd/Makefile
115@@ -698,11 +698,11 @@ endif
116 ifdef CONFIG_NO_RANDOM_POOL
117 CFLAGS += -DCONFIG_NO_RANDOM_POOL
118 else
119-OBJS += ../src/crypto/random.o
120-HOBJS += ../src/crypto/random.o
121 HOBJS += $(SHA1OBJS)
122 HOBJS += ../src/crypto/md5.o
123 endif
124+OBJS += ../src/crypto/random.o
125+HOBJS += ../src/crypto/random.o
126 
127 ifdef CONFIG_RADIUS_SERVER
128 CFLAGS += -DRADIUS_SERVER
129--- a/wpa_supplicant/Makefile
130+++ b/wpa_supplicant/Makefile
131@@ -1101,9 +1101,8 @@ endif
132 
133 ifdef CONFIG_NO_RANDOM_POOL
134 CFLAGS += -DCONFIG_NO_RANDOM_POOL
135-else
136-OBJS += ../src/crypto/random.o
137 endif
138+OBJS += ../src/crypto/random.o
139 
140 ifdef CONFIG_CTRL_IFACE
141 ifeq ($(CONFIG_CTRL_IFACE), y)
142--- a/wpa_supplicant/Android.mk
143+++ b/wpa_supplicant/Android.mk
144@@ -1109,9 +1109,8 @@ endif
145 
146 ifdef CONFIG_NO_RANDOM_POOL
147 L_CFLAGS += -DCONFIG_NO_RANDOM_POOL
148-else
149-OBJS += src/crypto/random.c
150 endif
151+OBJS += src/crypto/random.c
152 
153 ifdef CONFIG_CTRL_IFACE
154 ifeq ($(CONFIG_CTRL_IFACE), y)
155--- a/hostapd/Android.mk
156+++ b/hostapd/Android.mk
157@@ -717,11 +717,11 @@ endif
158 ifdef CONFIG_NO_RANDOM_POOL
159 L_CFLAGS += -DCONFIG_NO_RANDOM_POOL
160 else
161-OBJS += src/crypto/random.c
162-HOBJS += src/crypto/random.c
163 HOBJS += $(SHA1OBJS)
164 HOBJS += src/crypto/md5.c
165 endif
166+OBJS += src/crypto/random.c
167+HOBJS += src/crypto/random.c
168 
169 ifdef CONFIG_RADIUS_SERVER
170 L_CFLAGS += -DRADIUS_SERVER
171--- a/src/crypto/random.h
172+++ b/src/crypto/random.h
173@@ -18,17 +18,16 @@
174 #ifdef CONFIG_NO_RANDOM_POOL
175 #define random_init() do { } while (0)
176 #define random_deinit() do { } while (0)
177-#define random_add_randomness(b, l) do { } while (0)
178 #define random_get_bytes(b, l) os_get_random((b), (l))
179 #define random_pool_ready() 1
180 #define random_mark_pool_ready() do { } while (0)
181 #else /* CONFIG_NO_RANDOM_POOL */
182 void random_init(void);
183 void random_deinit(void);
184-void random_add_randomness(const void *buf, size_t len);
185 int random_get_bytes(void *buf, size_t len);
186 int random_pool_ready(void);
187 void random_mark_pool_ready(void);
188 #endif /* CONFIG_NO_RANDOM_POOL */
189+void random_add_randomness(const void *buf, size_t len);
190 
191 #endif /* RANDOM_H */
192

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