diff options
Diffstat (limited to 'compat/getentropy_osx.c')
| -rw-r--r-- | compat/getentropy_osx.c | 65 |
1 files changed, 25 insertions, 40 deletions
diff --git a/compat/getentropy_osx.c b/compat/getentropy_osx.c index d5a64ab363ab..26dcc824dee7 100644 --- a/compat/getentropy_osx.c +++ b/compat/getentropy_osx.c @@ -1,4 +1,4 @@ -/* $OpenBSD: getentropy_osx.c,v 1.3 2014/07/12 14:48:00 deraadt Exp $ */ +/* $OpenBSD: getentropy_osx.c,v 1.12 2018/11/20 08:04:28 deraadt Exp $ */ /* * Copyright (c) 2014 Theo de Raadt <deraadt@openbsd.org> @@ -15,9 +15,12 @@ * 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. + * + * Emulation of getentropy(2) as documented at: + * http://man.openbsd.org/getentropy.2 */ -#include "config.h" +#include <TargetConditionals.h> #include <sys/types.h> #include <sys/param.h> #include <sys/ioctl.h> @@ -43,14 +46,18 @@ #include <mach/mach_time.h> #include <mach/mach_host.h> #include <mach/host_info.h> +#if TARGET_OS_OSX #include <sys/socketvar.h> #include <sys/vmmeter.h> +#endif #include <netinet/in.h> #include <netinet/tcp.h> +#if TARGET_OS_OSX #include <netinet/udp.h> #include <netinet/ip_var.h> #include <netinet/tcp_var.h> #include <netinet/udp_var.h> +#endif #include <CommonCrypto/CommonDigest.h> #define SHA512_Update(a, b, c) (CC_SHA512_Update((a), (b), (c))) #define SHA512_Init(xxx) (CC_SHA512_Init((xxx))) @@ -75,10 +82,6 @@ int getentropy(void *buf, size_t len); -#ifdef CAN_REFERENCE_MAIN -extern int main(int, char *argv[]); -#endif -static int gotdata(char *buf, size_t len); static int getentropy_urandom(void *buf, size_t len); static int getentropy_fallback(void *buf, size_t len); @@ -89,7 +92,7 @@ getentropy(void *buf, size_t len) if (len > 256) { errno = EIO; - return -1; + return (-1); } /* @@ -138,22 +141,6 @@ getentropy(void *buf, size_t len) return (ret); } -/* - * Basic sanity checking; wish we could do better. - */ -static int -gotdata(char *buf, size_t len) -{ - char any_set = 0; - size_t i; - - for (i = 0; i < len; ++i) - any_set |= buf[i]; - if (any_set == 0) - return -1; - return 0; -} - static int getentropy_urandom(void *buf, size_t len) { @@ -188,7 +175,7 @@ start: } for (i = 0; i < len; ) { size_t wanted = len - i; - ssize_t ret = read(fd, (char*)buf + i, wanted); + ssize_t ret = read(fd, (char *)buf + i, wanted); if (ret == -1) { if (errno == EAGAIN || errno == EINTR) @@ -199,18 +186,18 @@ start: i += ret; } close(fd); - if (gotdata(buf, len) == 0) { - errno = save_errno; - return 0; /* satisfied */ - } + errno = save_errno; + return (0); /* satisfied */ nodevrandom: errno = EIO; - return -1; + return (-1); } +#if TARGET_OS_OSX static int tcpmib[] = { CTL_NET, AF_INET, IPPROTO_TCP, TCPCTL_STATS }; static int udpmib[] = { CTL_NET, AF_INET, IPPROTO_UDP, UDPCTL_STATS }; static int ipmib[] = { CTL_NET, AF_INET, IPPROTO_IP, IPCTL_STATS }; +#endif static int kmib[] = { CTL_KERN, KERN_USRSTACK }; static int hwmib[] = { CTL_HW, HW_USERMEM }; @@ -230,9 +217,11 @@ getentropy_fallback(void *buf, size_t len) pid_t pid; size_t i, ii, m; char *p; +#if TARGET_OS_OSX struct tcpstat tcpstat; struct udpstat udpstat; struct ipstat ipstat; +#endif u_int64_t mach_time; unsigned int idata; void *addr; @@ -267,6 +256,7 @@ getentropy_fallback(void *buf, size_t len) HX(sysctl(hwmib, sizeof(hwmib) / sizeof(hwmib[0]), &idata, &ii, NULL, 0) == -1, idata); +#if TARGET_OS_OSX ii = sizeof(tcpstat); HX(sysctl(tcpmib, sizeof(tcpmib) / sizeof(tcpmib[0]), &tcpstat, &ii, NULL, 0) == -1, tcpstat); @@ -278,6 +268,7 @@ getentropy_fallback(void *buf, size_t len) ii = sizeof(ipstat); HX(sysctl(ipmib, sizeof(ipmib) / sizeof(ipmib[0]), &ipstat, &ii, NULL, 0) == -1, ipstat); +#endif HX((pid = getpid()) == -1, pid); HX((pid = getsid(pid)) == -1, pid); @@ -295,9 +286,6 @@ getentropy_fallback(void *buf, size_t len) HX(sigprocmask(SIG_BLOCK, NULL, &sigset) == -1, sigset); -#ifdef CAN_REFERENCE_MAIN - HF(main); /* an addr in program */ -#endif HF(getentropy); /* an addr in this library */ HF(printf); /* an addr in libc */ p = (char *)&p; @@ -419,14 +407,11 @@ getentropy_fallback(void *buf, size_t len) } SHA512_Final(results, &ctx); - memcpy((char*)buf + i, results, min(sizeof(results), len - i)); + memcpy((char *)buf + i, results, min(sizeof(results), len - i)); i += min(sizeof(results), len - i); } - memset(results, 0, sizeof results); - if (gotdata(buf, len) == 0) { - errno = save_errno; - return 0; /* satisfied */ - } - errno = EIO; - return -1; + explicit_bzero(&ctx, sizeof ctx); + explicit_bzero(results, sizeof results); + errno = save_errno; + return (0); /* satisfied */ } |