diff options
| -rw-r--r-- | newlib/libc/include/machine/_arc4random.h | 1 | ||||
| -rw-r--r-- | newlib/libc/include/stdlib.h | 5 | ||||
| -rw-r--r-- | newlib/libc/include/sys/unistd.h | 3 | ||||
| -rw-r--r-- | newlib/libc/stdlib/Makefile.am | 2 | ||||
| -rw-r--r-- | newlib/libc/stdlib/Makefile.in | 29 | ||||
| -rw-r--r-- | newlib/libc/stdlib/arc4random.c | 195 | ||||
| -rw-r--r-- | newlib/libc/stdlib/arc4random.h | 83 | ||||
| -rw-r--r-- | newlib/libc/stdlib/arc4random_uniform.c | 56 | ||||
| -rw-r--r-- | newlib/libc/stdlib/chacha_private.h | 224 | ||||
| -rw-r--r-- | newlib/libc/sys/rtems/include/machine/_arc4random.h | 35 |
10 files changed, 626 insertions, 7 deletions
diff --git a/newlib/libc/include/machine/_arc4random.h b/newlib/libc/include/machine/_arc4random.h new file mode 100644 index 000000000..52808d722 --- /dev/null +++ b/newlib/libc/include/machine/_arc4random.h @@ -0,0 +1 @@ +/* Use default implementation, see arc4random.h */ diff --git a/newlib/libc/include/stdlib.h b/newlib/libc/include/stdlib.h index b0856fa08..f4b262698 100644 --- a/newlib/libc/include/stdlib.h +++ b/newlib/libc/include/stdlib.h @@ -64,6 +64,11 @@ int _EXFUN(__locale_mb_cur_max,(_VOID)); _VOID _EXFUN(abort,(_VOID) _ATTRIBUTE ((__noreturn__))); int _EXFUN(abs,(int)); +#if __BSD_VISIBLE +__uint32_t _EXFUN(arc4random, (void)); +__uint32_t _EXFUN(arc4random_uniform, (__uint32_t)); +void _EXFUN(arc4random_buf, (void *, size_t)); +#endif int _EXFUN(atexit,(_VOID (*__func)(_VOID))); double _EXFUN(atof,(const char *__nptr)); #if __MISC_VISIBLE diff --git a/newlib/libc/include/sys/unistd.h b/newlib/libc/include/sys/unistd.h index d07b82660..c8299bb02 100644 --- a/newlib/libc/include/sys/unistd.h +++ b/newlib/libc/include/sys/unistd.h @@ -87,6 +87,9 @@ char * _EXFUN(getcwd, (char *__buf, size_t __size )); #if __BSD_VISIBLE || (__XSI_VISIBLE && __XSI_VISIBLE < 500) int _EXFUN(getdomainname ,(char *__name, size_t __len)); #endif +#if __BSD_VISIBLE +int _EXFUN(getentropy, (void *, size_t)); +#endif #if !defined(__INSIDE_CYGWIN__) gid_t _EXFUN(getegid, (void )); uid_t _EXFUN(geteuid, (void )); diff --git a/newlib/libc/stdlib/Makefile.am b/newlib/libc/stdlib/Makefile.am index c1067eacb..9deaf9a64 100644 --- a/newlib/libc/stdlib/Makefile.am +++ b/newlib/libc/stdlib/Makefile.am @@ -102,6 +102,8 @@ MALLOCR=mallocr endif EXTENDED_SOURCES = \ + arc4random.c \ + arc4random_uniform.c \ cxa_atexit.c \ cxa_finalize.c \ drand48.c \ diff --git a/newlib/libc/stdlib/Makefile.in b/newlib/libc/stdlib/Makefile.in index 36e81c884..c991cb7e4 100644 --- a/newlib/libc/stdlib/Makefile.in +++ b/newlib/libc/stdlib/Makefile.in @@ -112,7 +112,8 @@ am__objects_2 = lib_a-__adjust.$(OBJEXT) lib_a-__atexit.$(OBJEXT) \ lib_a-wcstoul.$(OBJEXT) lib_a-wcstombs.$(OBJEXT) \ lib_a-wcstombs_r.$(OBJEXT) lib_a-wctomb.$(OBJEXT) \ lib_a-wctomb_r.$(OBJEXT) $(am__objects_1) -am__objects_3 = lib_a-cxa_atexit.$(OBJEXT) \ +am__objects_3 = lib_a-arc4random.$(OBJEXT) \ + lib_a-arc4random_uniform.$(OBJEXT) lib_a-cxa_atexit.$(OBJEXT) \ lib_a-cxa_finalize.$(OBJEXT) lib_a-drand48.$(OBJEXT) \ lib_a-ecvtbuf.$(OBJEXT) lib_a-efgcvt.$(OBJEXT) \ lib_a-erand48.$(OBJEXT) lib_a-jrand48.$(OBJEXT) \ @@ -162,12 +163,12 @@ am__objects_9 = __adjust.lo __atexit.lo __call_atexit.lo __exp10.lo \ strtodg.lo strtol.lo strtorx.lo strtoul.lo utoa.lo wcstod.lo \ wcstol.lo wcstoul.lo wcstombs.lo wcstombs_r.lo wctomb.lo \ wctomb_r.lo $(am__objects_8) -am__objects_10 = cxa_atexit.lo cxa_finalize.lo drand48.lo ecvtbuf.lo \ - efgcvt.lo erand48.lo jrand48.lo lcong48.lo lrand48.lo \ - mrand48.lo msize.lo mtrim.lo nrand48.lo rand48.lo seed48.lo \ - srand48.lo strtoll.lo strtoll_r.lo strtoull.lo strtoull_r.lo \ - wcstoll.lo wcstoll_r.lo wcstoull.lo wcstoull_r.lo atoll.lo \ - llabs.lo lldiv.lo +am__objects_10 = arc4random.lo arc4random_uniform.lo cxa_atexit.lo \ + cxa_finalize.lo drand48.lo ecvtbuf.lo efgcvt.lo erand48.lo \ + jrand48.lo lcong48.lo lrand48.lo mrand48.lo msize.lo mtrim.lo \ + nrand48.lo rand48.lo seed48.lo srand48.lo strtoll.lo \ + strtoll_r.lo strtoull.lo strtoull_r.lo wcstoll.lo wcstoll_r.lo \ + wcstoull.lo wcstoull_r.lo atoll.lo llabs.lo lldiv.lo am__objects_11 = a64l.lo btowc.lo getopt.lo getsubopt.lo l64a.lo \ malign.lo mbrlen.lo mbrtowc.lo mbsinit.lo mbsnrtowcs.lo \ mbsrtowcs.lo on_exit.lo valloc.lo wcrtomb.lo wcsnrtombs.lo \ @@ -391,6 +392,8 @@ GENERAL_SOURCES = __adjust.c __atexit.c __call_atexit.c __exp10.c \ @NEWLIB_NANO_MALLOC_FALSE@MALLOCR = mallocr @NEWLIB_NANO_MALLOC_TRUE@MALLOCR = nano-mallocr EXTENDED_SOURCES = \ + arc4random.c \ + arc4random_uniform.c \ cxa_atexit.c \ cxa_finalize.c \ drand48.c \ @@ -988,6 +991,18 @@ lib_a-wcstold.o: wcstold.c lib_a-wcstold.obj: wcstold.c $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-wcstold.obj `if test -f 'wcstold.c'; then $(CYGPATH_W) 'wcstold.c'; else $(CYGPATH_W) '$(srcdir)/wcstold.c'; fi` +lib_a-arc4random.o: arc4random.c + $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-arc4random.o `test -f 'arc4random.c' || echo '$(srcdir)/'`arc4random.c + +lib_a-arc4random.obj: arc4random.c + $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-arc4random.obj `if test -f 'arc4random.c'; then $(CYGPATH_W) 'arc4random.c'; else $(CYGPATH_W) '$(srcdir)/arc4random.c'; fi` + +lib_a-arc4random_uniform.o: arc4random_uniform.c + $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-arc4random_uniform.o `test -f 'arc4random_uniform.c' || echo '$(srcdir)/'`arc4random_uniform.c + +lib_a-arc4random_uniform.obj: arc4random_uniform.c + $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-arc4random_uniform.obj `if test -f 'arc4random_uniform.c'; then $(CYGPATH_W) 'arc4random_uniform.c'; else $(CYGPATH_W) '$(srcdir)/arc4random_uniform.c'; fi` + lib_a-cxa_atexit.o: cxa_atexit.c $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-cxa_atexit.o `test -f 'cxa_atexit.c' || echo '$(srcdir)/'`cxa_atexit.c diff --git a/newlib/libc/stdlib/arc4random.c b/newlib/libc/stdlib/arc4random.c new file mode 100644 index 000000000..75cdff3bc --- /dev/null +++ b/newlib/libc/stdlib/arc4random.c @@ -0,0 +1,195 @@ +/* $OpenBSD: arc4random.c,v 1.52 2015/01/16 16:48:51 deraadt Exp $ */ + +/* + * Copyright (c) 1996, David Mazieres <dm@uun.org> + * Copyright (c) 2008, Damien Miller <djm@openbsd.org> + * Copyright (c) 2013, Markus Friedl <markus@openbsd.org> + * Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * ChaCha based random number generator for OpenBSD. + */ + +#include <fcntl.h> +#include <limits.h> +#include <signal.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/time.h> + +#define KEYSTREAM_ONLY +#include "chacha_private.h" + +#define min(a, b) ((a) < (b) ? (a) : (b)) +#ifdef __GNUC__ +#define inline __inline +#else /* !__GNUC__ */ +#define inline +#endif /* !__GNUC__ */ + +#define KEYSZ 32 +#define IVSZ 8 +#define BLOCKSZ 64 +#define RSBUFSZ (16*BLOCKSZ) + +/* Marked MAP_INHERIT_ZERO, so zero'd out in fork children. */ +static struct _rs { + size_t rs_have; /* valid bytes at end of rs_buf */ + size_t rs_count; /* bytes till reseed */ +} *rs; + +/* Maybe be preserved in fork children, if _rs_allocate() decides. */ +static struct _rsx { + chacha_ctx rs_chacha; /* chacha context for random keystream */ + u_char rs_buf[RSBUFSZ]; /* keystream blocks */ +} *rsx; + +static inline int _rs_allocate(struct _rs **, struct _rsx **); +static inline void _rs_forkdetect(void); +#include "arc4random.h" + +static inline void _rs_rekey(u_char *dat, size_t datlen); + +static inline void +_rs_init(u_char *buf, size_t n) +{ + if (n < KEYSZ + IVSZ) + return; + + if (rs == NULL) { + if (_rs_allocate(&rs, &rsx) == -1) + abort(); + } + + chacha_keysetup(&rsx->rs_chacha, buf, KEYSZ * 8, 0); + chacha_ivsetup(&rsx->rs_chacha, buf + KEYSZ); +} + +static void +_rs_stir(void) +{ + u_char rnd[KEYSZ + IVSZ]; + + if (getentropy(rnd, sizeof rnd) == -1) + _getentropy_fail(); + + if (!rs) + _rs_init(rnd, sizeof(rnd)); + else + _rs_rekey(rnd, sizeof(rnd)); + explicit_bzero(rnd, sizeof(rnd)); /* discard source seed */ + + /* invalidate rs_buf */ + rs->rs_have = 0; + memset(rsx->rs_buf, 0, sizeof(rsx->rs_buf)); + + rs->rs_count = 1600000; +} + +static inline void +_rs_stir_if_needed(size_t len) +{ + _rs_forkdetect(); + if (!rs || rs->rs_count <= len) + _rs_stir(); + if (rs->rs_count <= len) + rs->rs_count = 0; + else + rs->rs_count -= len; +} + +static inline void +_rs_rekey(u_char *dat, size_t datlen) +{ +#ifndef KEYSTREAM_ONLY + memset(rsx->rs_buf, 0, sizeof(rsx->rs_buf)); +#endif + /* fill rs_buf with the keystream */ + chacha_encrypt_bytes(&rsx->rs_chacha, rsx->rs_buf, + rsx->rs_buf, sizeof(rsx->rs_buf)); + /* mix in optional user provided data */ + if (dat) { + size_t i, m; + + m = min(datlen, KEYSZ + IVSZ); + for (i = 0; i < m; i++) + rsx->rs_buf[i] ^= dat[i]; + } + /* immediately reinit for backtracking resistance */ + _rs_init(rsx->rs_buf, KEYSZ + IVSZ); + memset(rsx->rs_buf, 0, KEYSZ + IVSZ); + rs->rs_have = sizeof(rsx->rs_buf) - KEYSZ - IVSZ; +} + +static inline void +_rs_random_buf(void *_buf, size_t n) +{ + u_char *buf = (u_char *)_buf; + u_char *keystream; + size_t m; + + _rs_stir_if_needed(n); + while (n > 0) { + if (rs->rs_have > 0) { + m = min(n, rs->rs_have); + keystream = rsx->rs_buf + sizeof(rsx->rs_buf) + - rs->rs_have; + memcpy(buf, keystream, m); + memset(keystream, 0, m); + buf += m; + n -= m; + rs->rs_have -= m; + } + if (rs->rs_have == 0) + _rs_rekey(NULL, 0); + } +} + +static inline void +_rs_random_u32(uint32_t *val) +{ + u_char *keystream; + + _rs_stir_if_needed(sizeof(*val)); + if (rs->rs_have < sizeof(*val)) + _rs_rekey(NULL, 0); + keystream = rsx->rs_buf + sizeof(rsx->rs_buf) - rs->rs_have; + memcpy(val, keystream, sizeof(*val)); + memset(keystream, 0, sizeof(*val)); + rs->rs_have -= sizeof(*val); +} + +uint32_t +arc4random(void) +{ + uint32_t val; + + _ARC4_LOCK(); + _rs_random_u32(&val); + _ARC4_UNLOCK(); + return val; +} + +void +arc4random_buf(void *buf, size_t n) +{ + _ARC4_LOCK(); + _rs_random_buf(buf, n); + _ARC4_UNLOCK(); +} diff --git a/newlib/libc/stdlib/arc4random.h b/newlib/libc/stdlib/arc4random.h new file mode 100644 index 000000000..938a80b2e --- /dev/null +++ b/newlib/libc/stdlib/arc4random.h @@ -0,0 +1,83 @@ +/*- + * Copyright (c) 2016 embedded brains GmbH + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Newlib ports may override the default implementations via the following + * define and macros + * o _ARC4RANDOM_DATA, + * o _ARC4RANDOM_GETENTROPY_FAIL(), + * o _ARC4RANDOM_ALLOCATE(rsp, rspx), and + * o _ARC4RANDOM_FORKDETECT(). + */ +#include <machine/_arc4random.h> + +#include <sys/lock.h> +#include <signal.h> + +__LOCK_INIT(static, _arc4random_mutex); + +#define _ARC4_LOCK() __lock_acquire(_arc4random_mutex) + +#define _ARC4_UNLOCK() __lock_release(_arc4random_mutex) + +#ifdef _ARC4RANDOM_DATA +_ARC4RANDOM_DATA +#else +static struct { + struct _rs rs; + struct _rsx rsx; +} _arc4random_data; +#endif + +static inline void +_getentropy_fail(void) +{ +#ifdef _ARC4RANDOM_GETENTROPY_FAIL + _ARC4RANDOM_GETENTROPY_FAIL(); +#else + raise(SIGKILL); +#endif +} + +static inline int +_rs_allocate(struct _rs **rsp, struct _rsx **rsxp) +{ +#ifdef _ARC4RANDOM_ALLOCATE + _ARC4RANDOM_ALLOCATE(rsp, rsxp); +#else + *rsp = &_arc4random_data.rs; + *rsxp = &_arc4random_data.rsx; + return (0); +#endif +} + +static inline void +_rs_forkdetect(void) +{ +#ifdef _ARC4RANDOM_FORKDETECT + _ARC4RANDOM_FORKDETECT(); +#endif +} diff --git a/newlib/libc/stdlib/arc4random_uniform.c b/newlib/libc/stdlib/arc4random_uniform.c new file mode 100644 index 000000000..1aa9a622f --- /dev/null +++ b/newlib/libc/stdlib/arc4random_uniform.c @@ -0,0 +1,56 @@ +/* $OpenBSD: arc4random_uniform.c,v 1.1 2014/07/12 13:24:54 deraadt Exp $ */ + +/* + * Copyright (c) 2008, Damien Miller <djm@openbsd.org> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <sys/types.h> +#include <stdlib.h> + +/* + * Calculate a uniformly distributed random number less than upper_bound + * avoiding "modulo bias". + * + * Uniformity is achieved by generating new random numbers until the one + * returned is outside the range [0, 2**32 % upper_bound). This + * guarantees the selected random number will be inside + * [2**32 % upper_bound, 2**32) which maps back to [0, upper_bound) + * after reduction modulo upper_bound. + */ +uint32_t +arc4random_uniform(uint32_t upper_bound) +{ + uint32_t r, min; + + if (upper_bound < 2) + return 0; + + /* 2**32 % x == (2**32 - x) % x */ + min = -upper_bound % upper_bound; + + /* + * This could theoretically loop forever but each retry has + * p > 0.5 (worst case, usually far better) of selecting a + * number inside the range we need, so it should rarely need + * to re-roll. + */ + for (;;) { + r = arc4random(); + if (r >= min) + break; + } + + return r % upper_bound; +} diff --git a/newlib/libc/stdlib/chacha_private.h b/newlib/libc/stdlib/chacha_private.h new file mode 100644 index 000000000..b48c981e5 --- /dev/null +++ b/newlib/libc/stdlib/chacha_private.h @@ -0,0 +1,224 @@ +/* +chacha-merged.c version 20080118 +D. J. Bernstein +Public domain. +*/ + +/* $OpenBSD: chacha_private.h,v 1.2 2013/10/04 07:02:27 djm Exp $ */ + +#include <stdint.h> + +typedef uint8_t u8; +typedef uint32_t u32; + +typedef struct +{ + u32 input[16]; /* could be compressed */ +} chacha_ctx; + +#define U8C(v) (v##U) +#define U32C(v) (v##U) + +#define U8V(v) ((u8)(v) & U8C(0xFF)) +#define U32V(v) ((u32)(v) & U32C(0xFFFFFFFF)) + +#define ROTL32(v, n) \ + (U32V((v) << (n)) | ((v) >> (32 - (n)))) + +#define U8TO32_LITTLE(p) \ + (((u32)((p)[0]) ) | \ + ((u32)((p)[1]) << 8) | \ + ((u32)((p)[2]) << 16) | \ + ((u32)((p)[3]) << 24)) + +#define U32TO8_LITTLE(p, v) \ + do { \ + (p)[0] = U8V((v) ); \ + (p)[1] = U8V((v) >> 8); \ + (p)[2] = U8V((v) >> 16); \ + (p)[3] = U8V((v) >> 24); \ + } while (0) + +#define ROTATE(v,c) (ROTL32(v,c)) +#define XOR(v,w) ((v) ^ (w)) +#define PLUS(v,w) (U32V((v) + (w))) +#define PLUSONE(v) (PLUS((v),1)) + +#define QUARTERROUND(a,b,c,d) \ + a = PLUS(a,b); d = ROTATE(XOR(d,a),16); \ + c = PLUS(c,d); b = ROTATE(XOR(b,c),12); \ + a = PLUS(a,b); d = ROTATE(XOR(d,a), 8); \ + c = PLUS(c,d); b = ROTATE(XOR(b,c), 7); + +static const char sigma[16] = "expand 32-byte k"; +static const char tau[16] = "expand 16-byte k"; + +static void +chacha_keysetup(chacha_ctx *x,const u8 *k,u32 kbits,u32 ivbits) +{ + const char *constants; + + x->input[4] = U8TO32_LITTLE(k + 0); + x->input[5] = U8TO32_LITTLE(k + 4); + x->input[6] = U8TO32_LITTLE(k + 8); + x->input[7] = U8TO32_LITTLE(k + 12); + if (kbits == 256) { /* recommended */ + k += 16; + constants = sigma; + } else { /* kbits == 128 */ + constants = tau; + } + x->input[8] = U8TO32_LITTLE(k + 0); + x->input[9] = U8TO32_LITTLE(k + 4); + x->input[10] = U8TO32_LITTLE(k + 8); + x->input[11] = U8TO32_LITTLE(k + 12); + x->input[0] = U8TO32_LITTLE(constants + 0); + x->input[1] = U8TO32_LITTLE(constants + 4); + x->input[2] = U8TO32_LITTLE(constants + 8); + x->input[3] = U8TO32_LITTLE(constants + 12); +} + +static void +chacha_ivsetup(chacha_ctx *x,const u8 *iv) +{ + x->input[12] = 0; + x->input[13] = 0; + x->input[14] = U8TO32_LITTLE(iv + 0); + x->input[15] = U8TO32_LITTLE(iv + 4); +} + +static void +chacha_encrypt_bytes(chacha_ctx *x,const u8 *m,u8 *c,u32 bytes) +{ + u32 x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15; + u32 j0, j1, j2, j3, j4, j5, j6, j7, j8, j9, j10, j11, j12, j13, j14, j15; + u8 *ctarget = NULL; + u8 tmp[64]; + u_int i; + + if (!bytes) return; + + j0 = x->input[0]; + j1 = x->input[1]; + j2 = x->input[2]; + j3 = x->input[3]; + j4 = x->input[4]; + j5 = x->input[5]; + j6 = x->input[6]; + j7 = x->input[7]; + j8 = x->input[8]; + j9 = x->input[9]; + j10 = x->input[10]; + j11 = x->input[11]; + j12 = x->input[12]; + j13 = x->input[13]; + j14 = x->input[14]; + j15 = x->input[15]; + + for (;;) { + if (bytes < 64) { + for (i = 0;i < bytes;++i) tmp[i] = m[i]; + m = tmp; + ctarget = c; + c = tmp; + } + x0 = j0; + x1 = j1; + x2 = j2; + x3 = j3; + x4 = j4; + x5 = j5; + x6 = j6; + x7 = j7; + x8 = j8; + x9 = j9; + x10 = j10; + x11 = j11; + x12 = j12; + x13 = j13; + x14 = j14; + x15 = j15; + for (i = 20;i > 0;i -= 2) { + QUARTERROUND( x0, x4, x8,x12) + QUARTERROUND( x1, x5, x9,x13) + QUARTERROUND( x2, x6,x10,x14) + QUARTERROUND( x3, x7,x11,x15) + QUARTERROUND( x0, x5,x10,x15) + QUARTERROUND( x1, x6,x11,x12) + QUARTERROUND( x2, x7, x8,x13) + QUARTERROUND( x3, x4, x9,x14) + } + x0 = PLUS(x0,j0); + x1 = PLUS(x1,j1); + x2 = PLUS(x2,j2); + x3 = PLUS(x3,j3); + x4 = PLUS(x4,j4); + x5 = PLUS(x5,j5); + x6 = PLUS(x6,j6); + x7 = PLUS(x7,j7); + x8 = PLUS(x8,j8); + x9 = PLUS(x9,j9); + x10 = PLUS(x10,j10); + x11 = PLUS(x11,j11); + x12 = PLUS(x12,j12); + x13 = PLUS(x13,j13); + x14 = PLUS(x14,j14); + x15 = PLUS(x15,j15); + +#ifndef KEYSTREAM_ONLY + x0 = XOR(x0,U8TO32_LITTLE(m + 0)); + x1 = XOR(x1,U8TO32_LITTLE(m + 4)); + x2 = XOR(x2,U8TO32_LITTLE(m + 8)); + x3 = XOR(x3,U8TO32_LITTLE(m + 12)); + x4 = XOR(x4,U8TO32_LITTLE(m + 16)); + x5 = XOR(x5,U8TO32_LITTLE(m + 20)); + x6 = XOR(x6,U8TO32_LITTLE(m + 24)); + x7 = XOR(x7,U8TO32_LITTLE(m + 28)); + x8 = XOR(x8,U8TO32_LITTLE(m + 32)); + x9 = XOR(x9,U8TO32_LITTLE(m + 36)); + x10 = XOR(x10,U8TO32_LITTLE(m + 40)); + x11 = XOR(x11,U8TO32_LITTLE(m + 44)); + x12 = XOR(x12,U8TO32_LITTLE(m + 48)); + x13 = XOR(x13,U8TO32_LITTLE(m + 52)); + x14 = XOR(x14,U8TO32_LITTLE(m + 56)); + x15 = XOR(x15,U8TO32_LITTLE(m + 60)); +#endif + + j12 = PLUSONE(j12); + if (!j12) { + j13 = PLUSONE(j13); + /* stopping at 2^70 bytes per nonce is user's responsibility */ + } + + U32TO8_LITTLE(c + 0,x0); + U32TO8_LITTLE(c + 4,x1); + U32TO8_LITTLE(c + 8,x2); + U32TO8_LITTLE(c + 12,x3); + U32TO8_LITTLE(c + 16,x4); + U32TO8_LITTLE(c + 20,x5); + U32TO8_LITTLE(c + 24,x6); + U32TO8_LITTLE(c + 28,x7); + U32TO8_LITTLE(c + 32,x8); + U32TO8_LITTLE(c + 36,x9); + U32TO8_LITTLE(c + 40,x10); + U32TO8_LITTLE(c + 44,x11); + U32TO8_LITTLE(c + 48,x12); + U32TO8_LITTLE(c + 52,x13); + U32TO8_LITTLE(c + 56,x14); + U32TO8_LITTLE(c + 60,x15); + + if (bytes <= 64) { + if (bytes < 64) { + for (i = 0;i < bytes;++i) ctarget[i] = c[i]; + } + x->input[12] = j12; + x->input[13] = j13; + return; + } + bytes -= 64; + c += 64; +#ifndef KEYSTREAM_ONLY + m += 64; +#endif + } +} diff --git a/newlib/libc/sys/rtems/include/machine/_arc4random.h b/newlib/libc/sys/rtems/include/machine/_arc4random.h new file mode 100644 index 000000000..7ef296899 --- /dev/null +++ b/newlib/libc/sys/rtems/include/machine/_arc4random.h @@ -0,0 +1,35 @@ +/*- + * Copyright (c) 2016 embedded brains GmbH + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> + +__BEGIN_DECLS + +void _arc4random_getentropy_fail(void); + +#define _ARC4RANDOM_GETENTROPY_FAIL() _arc4random_getentropy_fail() + +__END_DECLS |