Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Crypto user configuration API.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2011 secunet Security Networks AG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2011 Steffen Klassert <steffen.klassert@secunet.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/cryptouser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/security.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <crypto/internal/skcipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <crypto/internal/rng.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <crypto/akcipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <crypto/kpp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <crypto/internal/cryptouser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define null_terminated(x)	(strnlen(x, sizeof(x)) < sizeof(x))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) static DEFINE_MUTEX(crypto_cfg_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) struct crypto_dump_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct sk_buff *in_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	struct sk_buff *out_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	u32 nlmsg_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	u16 nlmsg_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) struct crypto_alg *crypto_alg_match(struct crypto_user_alg *p, int exact)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct crypto_alg *q, *alg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	down_read(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	list_for_each_entry(q, &crypto_alg_list, cra_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 		int match = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		if (crypto_is_larval(q))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		if ((q->cra_flags ^ p->cru_type) & p->cru_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		if (strlen(p->cru_driver_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 			match = !strcmp(q->cra_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 					p->cru_driver_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		else if (!exact)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 			match = !strcmp(q->cra_name, p->cru_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		if (!match)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		if (unlikely(!crypto_mod_get(q)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		alg = q;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	up_read(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	return alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static int crypto_report_cipher(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct crypto_report_cipher rcipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	memset(&rcipher, 0, sizeof(rcipher));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	strscpy(rcipher.type, "cipher", sizeof(rcipher.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	rcipher.blocksize = alg->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	rcipher.min_keysize = alg->cra_cipher.cia_min_keysize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	rcipher.max_keysize = alg->cra_cipher.cia_max_keysize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	return nla_put(skb, CRYPTOCFGA_REPORT_CIPHER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		       sizeof(rcipher), &rcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) static int crypto_report_comp(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	struct crypto_report_comp rcomp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	memset(&rcomp, 0, sizeof(rcomp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	strscpy(rcomp.type, "compression", sizeof(rcomp.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	return nla_put(skb, CRYPTOCFGA_REPORT_COMPRESS, sizeof(rcomp), &rcomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) static int crypto_report_one(struct crypto_alg *alg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 			     struct crypto_user_alg *ualg, struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	memset(ualg, 0, sizeof(*ualg));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	strscpy(ualg->cru_name, alg->cra_name, sizeof(ualg->cru_name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	strscpy(ualg->cru_driver_name, alg->cra_driver_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		sizeof(ualg->cru_driver_name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	strscpy(ualg->cru_module_name, module_name(alg->cra_module),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		sizeof(ualg->cru_module_name));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	ualg->cru_type = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	ualg->cru_mask = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	ualg->cru_flags = alg->cra_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	ualg->cru_refcnt = refcount_read(&alg->cra_refcnt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	if (nla_put_u32(skb, CRYPTOCFGA_PRIORITY_VAL, alg->cra_priority))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (alg->cra_flags & CRYPTO_ALG_LARVAL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		struct crypto_report_larval rl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 		memset(&rl, 0, sizeof(rl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		strscpy(rl.type, "larval", sizeof(rl.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		if (nla_put(skb, CRYPTOCFGA_REPORT_LARVAL, sizeof(rl), &rl))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	if (alg->cra_type && alg->cra_type->report) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		if (alg->cra_type->report(skb, alg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 			goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		goto out;
^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) 	switch (alg->cra_flags & (CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_LARVAL)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	case CRYPTO_ALG_TYPE_CIPHER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		if (crypto_report_cipher(skb, alg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 			goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	case CRYPTO_ALG_TYPE_COMPRESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		if (crypto_report_comp(skb, alg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 			goto nla_put_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) nla_put_failure:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	return -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static int crypto_report_alg(struct crypto_alg *alg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			     struct crypto_dump_info *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	struct sk_buff *in_skb = info->in_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	struct sk_buff *skb = info->out_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	struct nlmsghdr *nlh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	struct crypto_user_alg *ualg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, info->nlmsg_seq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 			CRYPTO_MSG_GETALG, sizeof(*ualg), info->nlmsg_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	if (!nlh) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		err = -EMSGSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	ualg = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	err = crypto_report_one(alg, ualg, skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		nlmsg_cancel(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	nlmsg_end(skb, nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static int crypto_report(struct sk_buff *in_skb, struct nlmsghdr *in_nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 			 struct nlattr **attrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	struct net *net = sock_net(in_skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	struct crypto_user_alg *p = nlmsg_data(in_nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct crypto_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct crypto_dump_info info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	alg = crypto_alg_match(p, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	if (!alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	if (!skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		goto drop_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	info.in_skb = in_skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	info.out_skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	info.nlmsg_seq = in_nlh->nlmsg_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	info.nlmsg_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	err = crypto_report_alg(alg, &info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) drop_alg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	crypto_mod_put(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		kfree_skb(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	return nlmsg_unicast(net->crypto_nlsk, skb, NETLINK_CB(in_skb).portid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static int crypto_dump_report(struct sk_buff *skb, struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	const size_t start_pos = cb->args[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	size_t pos = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	struct crypto_dump_info info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	struct crypto_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	int res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	info.in_skb = cb->skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	info.out_skb = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	info.nlmsg_seq = cb->nlh->nlmsg_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	info.nlmsg_flags = NLM_F_MULTI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	down_read(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	list_for_each_entry(alg, &crypto_alg_list, cra_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		if (pos >= start_pos) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 			res = crypto_report_alg(alg, &info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 			if (res == -EMSGSIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 			if (res)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 				goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		pos++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	cb->args[0] = pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	res = skb->len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	up_read(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) static int crypto_dump_report_done(struct netlink_callback *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) static int crypto_update_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 			     struct nlattr **attrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	struct crypto_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	struct crypto_user_alg *p = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	LIST_HEAD(list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	if (!netlink_capable(skb, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (priority && !strlen(p->cru_driver_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	alg = crypto_alg_match(p, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	if (!alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	down_write(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	crypto_remove_spawns(alg, &list, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	if (priority)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		alg->cra_priority = nla_get_u32(priority);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	up_write(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	crypto_mod_put(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	crypto_remove_final(&list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static int crypto_del_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			  struct nlattr **attrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	struct crypto_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	struct crypto_user_alg *p = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	if (!netlink_capable(skb, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	alg = crypto_alg_match(p, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	if (!alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	/* We can not unregister core algorithms such as aes-generic.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	 * We would loose the reference in the crypto_alg_list to this algorithm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	 * if we try to unregister. Unregistering such an algorithm without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	 * removing the module is not possible, so we restrict to crypto
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	 * instances that are build from templates. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	if (!(alg->cra_flags & CRYPTO_ALG_INSTANCE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		goto drop_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	err = -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	if (refcount_read(&alg->cra_refcnt) > 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		goto drop_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	crypto_unregister_instance((struct crypto_instance *)alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) drop_alg:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	crypto_mod_put(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) static int crypto_add_alg(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 			  struct nlattr **attrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	int exact = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	struct crypto_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	struct crypto_user_alg *p = nlmsg_data(nlh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	struct nlattr *priority = attrs[CRYPTOCFGA_PRIORITY_VAL];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	if (!netlink_capable(skb, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	if (!null_terminated(p->cru_name) || !null_terminated(p->cru_driver_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	if (strlen(p->cru_driver_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		exact = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	if (priority && !exact)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	alg = crypto_alg_match(p, exact);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	if (alg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 		crypto_mod_put(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 		return -EEXIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	if (strlen(p->cru_driver_name))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 		name = p->cru_driver_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 		name = p->cru_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	alg = crypto_alg_mod_lookup(name, p->cru_type, p->cru_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	if (IS_ERR(alg))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 		return PTR_ERR(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	down_write(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 	if (priority)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 		alg->cra_priority = nla_get_u32(priority);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	up_write(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	crypto_mod_put(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) static int crypto_del_rng(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 			  struct nlattr **attrs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	if (!netlink_capable(skb, CAP_NET_ADMIN))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 		return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	return crypto_del_default_rng();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) #define MSGSIZE(type) sizeof(struct type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static const int crypto_msg_min[CRYPTO_NR_MSGTYPES] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	[CRYPTO_MSG_NEWALG	- CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	[CRYPTO_MSG_DELALG	- CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	[CRYPTO_MSG_UPDATEALG	- CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	[CRYPTO_MSG_GETALG	- CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	[CRYPTO_MSG_DELRNG	- CRYPTO_MSG_BASE] = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	[CRYPTO_MSG_GETSTAT	- CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static const struct nla_policy crypto_policy[CRYPTOCFGA_MAX+1] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	[CRYPTOCFGA_PRIORITY_VAL]   = { .type = NLA_U32},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) #undef MSGSIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static const struct crypto_link {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 	int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	int (*dump)(struct sk_buff *, struct netlink_callback *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	int (*done)(struct netlink_callback *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) } crypto_dispatch[CRYPTO_NR_MSGTYPES] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	[CRYPTO_MSG_NEWALG	- CRYPTO_MSG_BASE] = { .doit = crypto_add_alg},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	[CRYPTO_MSG_DELALG	- CRYPTO_MSG_BASE] = { .doit = crypto_del_alg},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 	[CRYPTO_MSG_UPDATEALG	- CRYPTO_MSG_BASE] = { .doit = crypto_update_alg},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 	[CRYPTO_MSG_GETALG	- CRYPTO_MSG_BASE] = { .doit = crypto_report,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 						       .dump = crypto_dump_report,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 						       .done = crypto_dump_report_done},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 	[CRYPTO_MSG_DELRNG	- CRYPTO_MSG_BASE] = { .doit = crypto_del_rng },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	[CRYPTO_MSG_GETSTAT	- CRYPTO_MSG_BASE] = { .doit = crypto_reportstat},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) static int crypto_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 			       struct netlink_ext_ack *extack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	struct net *net = sock_net(skb->sk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	struct nlattr *attrs[CRYPTOCFGA_MAX+1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	const struct crypto_link *link;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	int type, err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 	type = nlh->nlmsg_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	if (type > CRYPTO_MSG_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 	type -= CRYPTO_MSG_BASE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	link = &crypto_dispatch[type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	if ((type == (CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	    (nlh->nlmsg_flags & NLM_F_DUMP))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 		struct crypto_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 		unsigned long dump_alloc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 		if (link->dump == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 		down_read(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 		list_for_each_entry(alg, &crypto_alg_list, cra_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 			dump_alloc += CRYPTO_REPORT_MAXSIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 		up_read(&crypto_alg_sem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 		{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 			struct netlink_dump_control c = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 				.dump = link->dump,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 				.done = link->done,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 				.min_dump_alloc = min(dump_alloc, 65535UL),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 			};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 			err = netlink_dump_start(net->crypto_nlsk, skb, nlh, &c);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	err = nlmsg_parse_deprecated(nlh, crypto_msg_min[type], attrs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 				     CRYPTOCFGA_MAX, crypto_policy, extack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 	if (link->doit == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 	return link->doit(skb, nlh, attrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) static void crypto_netlink_rcv(struct sk_buff *skb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 	mutex_lock(&crypto_cfg_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 	netlink_rcv_skb(skb, &crypto_user_rcv_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 	mutex_unlock(&crypto_cfg_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) static int __net_init crypto_netlink_init(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 	struct netlink_kernel_cfg cfg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 		.input	= crypto_netlink_rcv,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) 	net->crypto_nlsk = netlink_kernel_create(net, NETLINK_CRYPTO, &cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 	return net->crypto_nlsk == NULL ? -ENOMEM : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) static void __net_exit crypto_netlink_exit(struct net *net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) 	netlink_kernel_release(net->crypto_nlsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	net->crypto_nlsk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) static struct pernet_operations crypto_netlink_net_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) 	.init = crypto_netlink_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 	.exit = crypto_netlink_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) static int __init crypto_user_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 	return register_pernet_subsys(&crypto_netlink_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) static void __exit crypto_user_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) 	unregister_pernet_subsys(&crypto_netlink_net_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) module_init(crypto_user_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) module_exit(crypto_user_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) MODULE_DESCRIPTION("Crypto userspace configuration API");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) MODULE_ALIAS("net-pf-16-proto-21");