-SUBDIR= aesni cryptodev glxsb hifn padlock safe ubsec
+SUBDIR= aesni cryptodev glxsb hifn padlock rdrand safe ubsec
.include <bsd.subdir.mk>
--- /dev/null
+KMOD= rdrand
+SRCS= rdrand.c rdrand_harvest_$(MACHINE_ARCH).S
+SRCS += device_if.h bus_if.h
+
+.include <bsd.kmod.mk>
--- /dev/null
+/*
+ * Copyright (c) 2012 Alex Hornung <alex@alexhornung.com>.
+ * 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT HOLDERS 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/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/kobj.h>
+#include <sys/libkern.h>
+#include <sys/module.h>
+#include <sys/malloc.h>
+#include <sys/bus.h>
+#include <sys/random.h>
+
+#include <machine/specialreg.h>
+
+#define RDRAND_ALIGN(p) (void *)(roundup2((uintptr_t)(p), 16))
+
+
+struct rdrand_softc {
+ struct callout sc_rng_co;
+ int32_t sc_rng_ticks;
+};
+
+
+static void rdrand_rng_harvest(void *);
+int rdrand_rng(uint8_t *out, int limit);
+
+
+MALLOC_DEFINE(M_RDRAND, "rdrand_data", "RdRand Data");
+
+
+static void
+rdrand_identify(driver_t *drv, device_t parent)
+{
+
+ /* NB: order 10 is so we get attached after h/w devices */
+ if (device_find_child(parent, "rdrand", -1) == NULL &&
+ BUS_ADD_CHILD(parent, parent, 10, "rdrand", -1) == 0)
+ panic("rdrand: could not attach");
+}
+
+
+static int
+rdrand_probe(device_t dev)
+{
+
+ if ((cpu_feature2 & CPUID2_RDRAND) == 0) {
+ device_printf(dev, "No RdRand support.\n");
+ return (EINVAL);
+ }
+
+ device_set_desc(dev, "RdRand RNG");
+ return 0;
+}
+
+
+static int
+rdrand_attach(device_t dev)
+{
+ struct rdrand_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ if (hz > 100)
+ sc->sc_rng_ticks = hz/100;
+ else
+ sc->sc_rng_ticks = 1;
+
+ callout_init_mp(&sc->sc_rng_co);
+ callout_reset(&sc->sc_rng_co, sc->sc_rng_ticks,
+ rdrand_rng_harvest, sc);
+
+ return 0;
+}
+
+
+static int
+rdrand_detach(device_t dev)
+{
+ struct rdrand_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ callout_stop_sync(&sc->sc_rng_co);
+
+ return (0);
+}
+
+
+static int random_count = 512; /* in bytes */
+
+static void
+rdrand_rng_harvest(void *arg)
+{
+ struct rdrand_softc *sc = arg;
+ uint8_t randomness[2048];
+ uint8_t *arandomness; /* randomness aligned */
+ int i, cnt;
+
+ arandomness = RDRAND_ALIGN(randomness);
+ cnt = rdrand_rng(arandomness, random_count);
+
+ for (i = 0; i < cnt; i++)
+ add_true_randomness((int)arandomness[i]);
+
+ callout_reset(&sc->sc_rng_co, sc->sc_rng_ticks,
+ rdrand_rng_harvest, sc);
+}
+
+
+static device_method_t rdrand_methods[] = {
+ DEVMETHOD(device_identify, rdrand_identify),
+ DEVMETHOD(device_probe, rdrand_probe),
+ DEVMETHOD(device_attach, rdrand_attach),
+ DEVMETHOD(device_detach, rdrand_detach),
+
+ {0, 0},
+};
+
+
+static driver_t rdrand_driver = {
+ "rdrand",
+ rdrand_methods,
+ sizeof(struct rdrand_softc),
+};
+
+static devclass_t rdrand_devclass;
+
+DRIVER_MODULE(rdrand, nexus, rdrand_driver, rdrand_devclass, NULL, NULL);
+MODULE_VERSION(rdrand, 1);
+MODULE_DEPEND(rdrand, crypto, 1, 1, 1);
--- /dev/null
+/*
+ * Copyright (c) 2012 Alex Hornung <alex@alexhornung.com>.
+ * 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT HOLDERS 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 <machine/asmacros.h>
+
+ .text
+
+/* int rdrand_rng(uint8_t *out, int limit) */
+ENTRY(rdrand_rng)
+ movl 4(%esp),%edi
+ movl 8(%esp),%ecx
+
+ shrl $2, %ecx /* Divide by 4 to get 32-bit word count */
+
+ xorl %ebx, %ebx
+loop:
+ /*
+ * edx: (output) entropy
+ */
+ rdrand %edx /* rdrand32 */
+
+ /*
+ * The carry flag (CF) determines if the instruction was
+ * successful or not.
+ *
+ * CF = 0: Random value not available at time of execution.
+ */
+ jae out
+
+ /*
+ * The operation was successful, so store the random data
+ * from the register into our buffer.
+ */
+ movl %edx, (%edi)
+
+ /*
+ * Increment the count of stored random words as well as the
+ * buffer pointer in edi.
+ */
+ addl $1, %ebx
+ addl $4, %edi
+
+ /*
+ * If we haven't already read enough random words,
+ * loop again.
+ */
+ cmpl %ecx, %ebx
+ jl loop
+out:
+ /* return the number of stored random bytes (random words * 4) */
+ shll $2, %ebx
+ movl %ebx, %eax
+ ret
+END(rdrand_rng)
--- /dev/null
+/*
+ * Copyright (c) 2012 Alex Hornung <alex@alexhornung.com>.
+ * 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 COPYRIGHT HOLDERS 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
+ * COPYRIGHT HOLDERS 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 <machine/asmacros.h>
+
+ .text
+
+/* int rdrand_rng(uint8_t *out, int limit) */
+ENTRY(rdrand_rng)
+ movl %esi, %ecx
+ shrl $3, %ecx /* Divide by 8 to get 64-bit word count */
+
+ xorq %rbx, %rbx
+loop:
+ /*
+ * rdx: (output) entropy
+ */
+ rdrand %rdx /* rdrand64 */
+
+ /*
+ * The carry flag (CF) determines if the instruction was
+ * successful or not.
+ *
+ * CF = 0: Random value not available at time of execution.
+ */
+ jae out
+
+ /*
+ * The operation was successful, so store the random data
+ * from the register into our buffer.
+ */
+ movq %rdx, (%rdi)
+
+ /*
+ * Increment the count of stored random words as well as the
+ * buffer pointer in rdi.
+ */
+ addl $1, %ebx
+ addq $8, %rdi
+
+ /*
+ * If we haven't already read enough random words,
+ * loop again.
+ */
+ cmpl %ecx, %ebx
+ jl loop
+out:
+ /* return the number of stored random bytes (random words * 8) */
+ shll $3, %ebx
+ movl %ebx, %eax
+ ret
+END(rdrand_rng)
dev/crypto/padlock/padlock_hash.c optional padlock
dev/crypto/padlock/padlock_rng.c optional padlock
dev/crypto/padlock/rng_harvest_i386.S optional padlock
+dev/crypto/rdrand/rdrand.c optional rdrand
+dev/crypto/rdrand/rdrand_harvest_i386.S optional rdrand
dev/netif/ed/if_ed_isa.c optional ed isa
dev/video/fb/fb.c optional fb
dev/video/fb/fb.c optional vga
dev/crypto/padlock/padlock_hash.c optional padlock
dev/crypto/padlock/padlock_rng.c optional padlock
dev/crypto/padlock/rng_harvest_x86_64.S optional padlock
+dev/crypto/rdrand/rdrand.c optional rdrand
+dev/crypto/rdrand/rdrand_harvest_x86_64.S optional rdrand
dev/video/fb/fb.c optional vga
dev/video/fb/splash.c optional splash
dev/video/fb/vga.c optional vga
projects / dragonfly.git / commitdiff