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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | /* * include/linux/random.h * * Include file for the random number generator. */ #ifndef _LINUX_RANDOM_H #define _LINUX_RANDOM_H #include <linux/types.h> #include <linux/ioctl.h> #include <linux/irqnr.h> /* ioctl()'s for the random number generator */ /* Get the entropy count. */ #define RNDGETENTCNT _IOR( 'R', 0x00, int ) /* Add to (or subtract from) the entropy count. (Superuser only.) */ #define RNDADDTOENTCNT _IOW( 'R', 0x01, int ) /* Get the contents of the entropy pool. (Superuser only.) */ #define RNDGETPOOL _IOR( 'R', 0x02, int [2] ) /* * Write bytes into the entropy pool and add to the entropy count. * (Superuser only.) */ #define RNDADDENTROPY _IOW( 'R', 0x03, int [2] ) /* Clear entropy count to 0. (Superuser only.) */ #define RNDZAPENTCNT _IO( 'R', 0x04 ) /* Clear the entropy pool and associated counters. (Superuser only.) */ #define RNDCLEARPOOL _IO( 'R', 0x06 ) struct rand_pool_info { int entropy_count; int buf_size; __u32 buf[0]; }; struct rnd_state { __u32 s1, s2, s3; }; /* Exported functions */ #ifdef __KERNEL__ extern void rand_initialize_irq(int irq); extern void add_device_randomness(const void *, unsigned int); extern void add_input_randomness(unsigned int type, unsigned int code, unsigned int value); extern void add_interrupt_randomness(int irq, int irq_flags); extern void get_random_bytes(void *buf, int nbytes); extern void get_random_bytes_arch(void *buf, int nbytes); void generate_random_uuid(unsigned char uuid_out[16]); extern int random_int_secret_init(void); #ifndef MODULE extern const struct file_operations random_fops, urandom_fops; #endif unsigned int get_random_int(void); unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len); u32 random32(void); void srandom32(u32 seed); u32 prandom32(struct rnd_state *); /* * Handle minimum values for seeds */ static inline u32 __seed(u32 x, u32 m) { return (x < m) ? x + m : x; } /** * prandom32_seed - set seed for prandom32(). * @state: pointer to state structure to receive the seed. * @seed: arbitrary 64-bit value to use as a seed. */ static inline void prandom32_seed(struct rnd_state *state, u64 seed) { u32 i = (seed >> 32) ^ (seed << 10) ^ seed; state->s1 = __seed(i, 2); state->s2 = __seed(i, 8); state->s3 = __seed(i, 16); } #ifdef CONFIG_ARCH_RANDOM # include <asm/archrandom.h> #else static inline int arch_get_random_long(unsigned long *v) { return 0; } static inline int arch_get_random_int(unsigned int *v) { return 0; } #endif #endif /* __KERNEL___ */ #endif /* _LINUX_RANDOM_H */ |