^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Cryptographic API.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * RNG operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (c) 2008 Neil Horman <nhorman@tuxdriver.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/atomic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <crypto/internal/rng.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/cryptouser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static DEFINE_MUTEX(crypto_default_rng_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct crypto_rng *crypto_default_rng;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) EXPORT_SYMBOL_GPL(crypto_default_rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static int crypto_default_rng_refcnt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int crypto_rng_reset(struct crypto_rng *tfm, const u8 *seed, unsigned int slen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct crypto_alg *alg = tfm->base.__crt_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) u8 *buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (!seed && slen) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) buf = kmalloc(slen, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (!buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) err = get_random_bytes_wait(buf, slen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) seed = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) crypto_stats_get(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) err = crypto_rng_alg(tfm)->seed(tfm, seed, slen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) crypto_stats_rng_seed(alg, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) kfree_sensitive(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) EXPORT_SYMBOL_GPL(crypto_rng_reset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static int crypto_rng_init_tfm(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static unsigned int seedsize(struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct rng_alg *ralg = container_of(alg, struct rng_alg, base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return ralg->seedsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #ifdef CONFIG_NET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) struct crypto_report_rng rrng;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) memset(&rrng, 0, sizeof(rrng));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) strscpy(rrng.type, "rng", sizeof(rrng.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) rrng.seedsize = seedsize(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return nla_put(skb, CRYPTOCFGA_REPORT_RNG, sizeof(rrng), &rrng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static int crypto_rng_report(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) __maybe_unused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static void crypto_rng_show(struct seq_file *m, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) seq_printf(m, "type : rng\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) seq_printf(m, "seedsize : %u\n", seedsize(alg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static const struct crypto_type crypto_rng_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .extsize = crypto_alg_extsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .init_tfm = crypto_rng_init_tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .show = crypto_rng_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .report = crypto_rng_report,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .maskclear = ~CRYPTO_ALG_TYPE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) .maskset = CRYPTO_ALG_TYPE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) .type = CRYPTO_ALG_TYPE_RNG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .tfmsize = offsetof(struct crypto_rng, base),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct crypto_rng *crypto_alloc_rng(const char *alg_name, u32 type, u32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return crypto_alloc_tfm(alg_name, &crypto_rng_type, type, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) EXPORT_SYMBOL_GPL(crypto_alloc_rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int crypto_get_default_rng(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct crypto_rng *rng;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) mutex_lock(&crypto_default_rng_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (!crypto_default_rng) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) rng = crypto_alloc_rng("stdrng", 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) err = PTR_ERR(rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (IS_ERR(rng))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) err = crypto_rng_reset(rng, NULL, crypto_rng_seedsize(rng));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) crypto_free_rng(rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) crypto_default_rng = rng;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) crypto_default_rng_refcnt++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) mutex_unlock(&crypto_default_rng_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) EXPORT_SYMBOL_GPL(crypto_get_default_rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) void crypto_put_default_rng(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) mutex_lock(&crypto_default_rng_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) crypto_default_rng_refcnt--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) mutex_unlock(&crypto_default_rng_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) EXPORT_SYMBOL_GPL(crypto_put_default_rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #if defined(CONFIG_CRYPTO_RNG) || defined(CONFIG_CRYPTO_RNG_MODULE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) int crypto_del_default_rng(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) int err = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) mutex_lock(&crypto_default_rng_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if (crypto_default_rng_refcnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) crypto_free_rng(crypto_default_rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) crypto_default_rng = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) mutex_unlock(&crypto_default_rng_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) EXPORT_SYMBOL_GPL(crypto_del_default_rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) int crypto_register_rng(struct rng_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) struct crypto_alg *base = &alg->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (alg->seedsize > PAGE_SIZE / 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) base->cra_type = &crypto_rng_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) base->cra_flags |= CRYPTO_ALG_TYPE_RNG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return crypto_register_alg(base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) EXPORT_SYMBOL_GPL(crypto_register_rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) void crypto_unregister_rng(struct rng_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) crypto_unregister_alg(&alg->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) EXPORT_SYMBOL_GPL(crypto_unregister_rng);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) int crypto_register_rngs(struct rng_alg *algs, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) for (i = 0; i < count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) ret = crypto_register_rng(algs + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) for (--i; i >= 0; --i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) crypto_unregister_rng(algs + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) EXPORT_SYMBOL_GPL(crypto_register_rngs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) void crypto_unregister_rngs(struct rng_alg *algs, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) for (i = count - 1; i >= 0; --i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) crypto_unregister_rng(algs + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) EXPORT_SYMBOL_GPL(crypto_unregister_rngs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) MODULE_DESCRIPTION("Random Number Generator");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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