[mirror_ubuntu-jammy-kernel.git] / crypto / asymmetric_keys / public_key.c

// SPDX-License-Identifier: GPL-2.0-or-later
/* In-software asymmetric public-key crypto subtype
 *
 * See Documentation/crypto/asymmetric-keys.txt
 *
 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 */

#define pr_fmt(fmt) "PKEY: "fmt
#include <linux/module.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <linux/scatterlist.h>
#include <keys/asymmetric-subtype.h>
#include <crypto/public_key.h>
#include <crypto/akcipher.h>

MODULE_DESCRIPTION("In-software asymmetric public-key subtype");
MODULE_AUTHOR("Red Hat, Inc.");
MODULE_LICENSE("GPL");

/*
 * Provide a part of a description of the key for /proc/keys.
 */
static void public_key_describe(const struct key *asymmetric_key,
				struct seq_file *m)
{
	struct public_key *key = asymmetric_key->payload.data[asym_crypto];

	if (key)
		seq_printf(m, "%s.%s", key->id_type, key->pkey_algo);
}

/*
 * Destroy a public key algorithm key.
 */
void public_key_free(struct public_key *key)
{
	if (key) {
		kfree(key->key);
		kfree(key->params);
		kfree(key);
	}
}
EXPORT_SYMBOL_GPL(public_key_free);

/*
 * Destroy a public key algorithm key.
 */
static void public_key_destroy(void *payload0, void *payload3)
{
	public_key_free(payload0);
	public_key_signature_free(payload3);
}

/*
 * Determine the crypto algorithm name.
 */
static
int software_key_determine_akcipher(const char *encoding,
				    const char *hash_algo,
				    const struct public_key *pkey,
				    char alg_name[CRYPTO_MAX_ALG_NAME])
{
	int n;

	if (strcmp(encoding, "pkcs1") == 0) {
		/* The data wangled by the RSA algorithm is typically padded
		 * and encoded in some manner, such as EMSA-PKCS1-1_5 [RFC3447
		 * sec 8.2].
		 */
		if (!hash_algo)
			n = snprintf(alg_name, CRYPTO_MAX_ALG_NAME,
				     "pkcs1pad(%s)",
				     pkey->pkey_algo);
		else
			n = snprintf(alg_name, CRYPTO_MAX_ALG_NAME,
				     "pkcs1pad(%s,%s)",
				     pkey->pkey_algo, hash_algo);
		return n >= CRYPTO_MAX_ALG_NAME ? -EINVAL : 0;
	}

	if (strcmp(encoding, "raw") == 0) {
		strcpy(alg_name, pkey->pkey_algo);
		return 0;
	}

	return -ENOPKG;
}

static u8 *pkey_pack_u32(u8 *dst, u32 val)
{
	memcpy(dst, &val, sizeof(val));
	return dst + sizeof(val);
}

/*
 * Query information about a key.
 */
static int software_key_query(const struct kernel_pkey_params *params,
			      struct kernel_pkey_query *info)
{
	struct crypto_akcipher *tfm;
	struct public_key *pkey = params->key->payload.data[asym_crypto];
	char alg_name[CRYPTO_MAX_ALG_NAME];
	u8 *key, *ptr;
	int ret, len;

	ret = software_key_determine_akcipher(params->encoding,
					      params->hash_algo,
					      pkey, alg_name);
	if (ret < 0)
		return ret;

	tfm = crypto_alloc_akcipher(alg_name, 0, 0);
	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	key = kmalloc(pkey->keylen + sizeof(u32) * 2 + pkey->paramlen,
		      GFP_KERNEL);
	if (!key)
		goto error_free_tfm;
	memcpy(key, pkey->key, pkey->keylen);
	ptr = key + pkey->keylen;
	ptr = pkey_pack_u32(ptr, pkey->algo);
	ptr = pkey_pack_u32(ptr, pkey->paramlen);
	memcpy(ptr, pkey->params, pkey->paramlen);

	if (pkey->key_is_private)
		ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
	else
		ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
	if (ret < 0)
		goto error_free_key;

	len = crypto_akcipher_maxsize(tfm);
	info->key_size = len * 8;
	info->max_data_size = len;
	info->max_sig_size = len;
	info->max_enc_size = len;
	info->max_dec_size = len;
	info->supported_ops = (KEYCTL_SUPPORTS_ENCRYPT |
			       KEYCTL_SUPPORTS_VERIFY);
	if (pkey->key_is_private)
		info->supported_ops |= (KEYCTL_SUPPORTS_DECRYPT |
					KEYCTL_SUPPORTS_SIGN);
	ret = 0;

error_free_key:
	kfree(key);
error_free_tfm:
	crypto_free_akcipher(tfm);
	pr_devel("<==%s() = %d\n", __func__, ret);
	return ret;
}

/*
 * Do encryption, decryption and signing ops.
 */
static int software_key_eds_op(struct kernel_pkey_params *params,
			       const void *in, void *out)
{
	const struct public_key *pkey = params->key->payload.data[asym_crypto];
	struct akcipher_request *req;
	struct crypto_akcipher *tfm;
	struct crypto_wait cwait;
	struct scatterlist in_sg, out_sg;
	char alg_name[CRYPTO_MAX_ALG_NAME];
	char *key, *ptr;
	int ret;

	pr_devel("==>%s()\n", __func__);

	ret = software_key_determine_akcipher(params->encoding,
					      params->hash_algo,
					      pkey, alg_name);
	if (ret < 0)
		return ret;

	tfm = crypto_alloc_akcipher(alg_name, 0, 0);
	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	ret = -ENOMEM;
	req = akcipher_request_alloc(tfm, GFP_KERNEL);
	if (!req)
		goto error_free_tfm;

	key = kmalloc(pkey->keylen + sizeof(u32) * 2 + pkey->paramlen,
		      GFP_KERNEL);
	if (!key)
		goto error_free_req;

	memcpy(key, pkey->key, pkey->keylen);
	ptr = key + pkey->keylen;
	ptr = pkey_pack_u32(ptr, pkey->algo);
	ptr = pkey_pack_u32(ptr, pkey->paramlen);
	memcpy(ptr, pkey->params, pkey->paramlen);

	if (pkey->key_is_private)
		ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
	else
		ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
	if (ret)
		goto error_free_key;

	sg_init_one(&in_sg, in, params->in_len);
	sg_init_one(&out_sg, out, params->out_len);
	akcipher_request_set_crypt(req, &in_sg, &out_sg, params->in_len,
				   params->out_len);
	crypto_init_wait(&cwait);
	akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG |
				      CRYPTO_TFM_REQ_MAY_SLEEP,
				      crypto_req_done, &cwait);

	/* Perform the encryption calculation. */
	switch (params->op) {
	case kernel_pkey_encrypt:
		ret = crypto_akcipher_encrypt(req);
		break;
	case kernel_pkey_decrypt:
		ret = crypto_akcipher_decrypt(req);
		break;
	case kernel_pkey_sign:
		ret = crypto_akcipher_sign(req);
		break;
	default:
		BUG();
	}

	ret = crypto_wait_req(ret, &cwait);
	if (ret == 0)
		ret = req->dst_len;

error_free_key:
	kfree(key);
error_free_req:
	akcipher_request_free(req);
error_free_tfm:
	crypto_free_akcipher(tfm);
	pr_devel("<==%s() = %d\n", __func__, ret);
	return ret;
}

/*
 * Verify a signature using a public key.
 */
int public_key_verify_signature(const struct public_key *pkey,
				const struct public_key_signature *sig)
{
	struct crypto_wait cwait;
	struct crypto_akcipher *tfm;
	struct akcipher_request *req;
	struct scatterlist src_sg[2];
	char alg_name[CRYPTO_MAX_ALG_NAME];
	char *key, *ptr;
	int ret;

	pr_devel("==>%s()\n", __func__);

	BUG_ON(!pkey);
	BUG_ON(!sig);
	BUG_ON(!sig->s);

	ret = software_key_determine_akcipher(sig->encoding,
					      sig->hash_algo,
					      pkey, alg_name);
	if (ret < 0)
		return ret;

	tfm = crypto_alloc_akcipher(alg_name, 0, 0);
	if (IS_ERR(tfm))
		return PTR_ERR(tfm);

	ret = -ENOMEM;
	req = akcipher_request_alloc(tfm, GFP_KERNEL);
	if (!req)
		goto error_free_tfm;

	key = kmalloc(pkey->keylen + sizeof(u32) * 2 + pkey->paramlen,
		      GFP_KERNEL);
	if (!key)
		goto error_free_req;

	memcpy(key, pkey->key, pkey->keylen);
	ptr = key + pkey->keylen;
	ptr = pkey_pack_u32(ptr, pkey->algo);
	ptr = pkey_pack_u32(ptr, pkey->paramlen);
	memcpy(ptr, pkey->params, pkey->paramlen);

	if (pkey->key_is_private)
		ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
	else
		ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
	if (ret)
		goto error_free_key;

	sg_init_table(src_sg, 2);
	sg_set_buf(&src_sg[0], sig->s, sig->s_size);
	sg_set_buf(&src_sg[1], sig->digest, sig->digest_size);
	akcipher_request_set_crypt(req, src_sg, NULL, sig->s_size,
				   sig->digest_size);
	crypto_init_wait(&cwait);
	akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG |
				      CRYPTO_TFM_REQ_MAY_SLEEP,
				      crypto_req_done, &cwait);
	ret = crypto_wait_req(crypto_akcipher_verify(req), &cwait);

error_free_key:
	kfree(key);
error_free_req:
	akcipher_request_free(req);
error_free_tfm:
	crypto_free_akcipher(tfm);
	pr_devel("<==%s() = %d\n", __func__, ret);
	if (WARN_ON_ONCE(ret > 0))
		ret = -EINVAL;
	return ret;
}
EXPORT_SYMBOL_GPL(public_key_verify_signature);

static int public_key_verify_signature_2(const struct key *key,
					 const struct public_key_signature *sig)
{
	const struct public_key *pk = key->payload.data[asym_crypto];
	return public_key_verify_signature(pk, sig);
}

/*
 * Public key algorithm asymmetric key subtype
 */
struct asymmetric_key_subtype public_key_subtype = {
	.owner			= THIS_MODULE,
	.name			= "public_key",
	.name_len		= sizeof("public_key") - 1,
	.describe		= public_key_describe,
	.destroy		= public_key_destroy,
	.query			= software_key_query,
	.eds_op			= software_key_eds_op,
	.verify_signature	= public_key_verify_signature_2,
};
EXPORT_SYMBOL_GPL(public_key_subtype);
Commit	Line	Data
b4d0d230	1	// SPDX-License-Identifier: GPL-2.0-or-later
a9681bf3 DH	2	/* In-software asymmetric public-key crypto subtype
	3	*
	4	* See Documentation/crypto/asymmetric-keys.txt
	5	*
	6	* Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
	7	* Written by David Howells (dhowells@redhat.com)
a9681bf3 DH	8	*/
	9
	10	#define pr_fmt(fmt) "PKEY: "fmt
	11	#include <linux/module.h>
	12	#include <linux/export.h>
	13	#include <linux/kernel.h>
	14	#include <linux/slab.h>
	15	#include <linux/seq_file.h>
d43de6c7	16	#include <linux/scatterlist.h>
a9681bf3	17	#include <keys/asymmetric-subtype.h>
db6c43bd	18	#include <crypto/public_key.h>
d43de6c7	19	#include <crypto/akcipher.h>
a9681bf3	20
1e684d38 DH	21	MODULE_DESCRIPTION("In-software asymmetric public-key subtype");
1e684d38 DH	22	MODULE_AUTHOR("Red Hat, Inc.");
a9681bf3 DH	23	MODULE_LICENSE("GPL");
a9681bf3 DH	24
a9681bf3 DH	25	/*
	26	* Provide a part of a description of the key for /proc/keys.
	27	*/
	28	static void public_key_describe(const struct key *asymmetric_key,
	29	struct seq_file *m)
	30	{
146aa8b1	31	struct public_key *key = asymmetric_key->payload.data[asym_crypto];
a9681bf3 DH	32
a9681bf3 DH	33	if (key)
4e8ae72a	34	seq_printf(m, "%s.%s", key->id_type, key->pkey_algo);
a9681bf3 DH	35	}
	36
	37	/*
	38	* Destroy a public key algorithm key.
	39	*/
3b764563	40	void public_key_free(struct public_key *key)
a9681bf3	41	{
3b764563	42	if (key) {
db6c43bd	43	kfree(key->key);
f1774cb8	44	kfree(key->params);
3b764563 DH	45	kfree(key);
	46	}
	47	}
	48	EXPORT_SYMBOL_GPL(public_key_free);
	49
	50	/*
	51	* Destroy a public key algorithm key.
	52	*/
	53	static void public_key_destroy(void payload0, void payload3)
	54	{
	55	public_key_free(payload0);
	56	public_key_signature_free(payload3);
a9681bf3	57	}
a9681bf3	58
82f94f24 DH	59	/*
	60	* Determine the crypto algorithm name.
	61	*/
	62	static
	63	int software_key_determine_akcipher(const char *encoding,
	64	const char *hash_algo,
	65	const struct public_key *pkey,
	66	char alg_name[CRYPTO_MAX_ALG_NAME])
	67	{
	68	int n;
	69
	70	if (strcmp(encoding, "pkcs1") == 0) {
	71	/* The data wangled by the RSA algorithm is typically padded
	72	* and encoded in some manner, such as EMSA-PKCS1-1_5 [RFC3447
	73	* sec 8.2].
	74	*/
	75	if (!hash_algo)
	76	n = snprintf(alg_name, CRYPTO_MAX_ALG_NAME,
	77	"pkcs1pad(%s)",
	78	pkey->pkey_algo);
	79	else
	80	n = snprintf(alg_name, CRYPTO_MAX_ALG_NAME,
	81	"pkcs1pad(%s,%s)",
	82	pkey->pkey_algo, hash_algo);
	83	return n >= CRYPTO_MAX_ALG_NAME ? -EINVAL : 0;
	84	}
	85
	86	if (strcmp(encoding, "raw") == 0) {
	87	strcpy(alg_name, pkey->pkey_algo);
	88	return 0;
	89	}
	90
	91	return -ENOPKG;
	92	}
	93
f1774cb8 VC	94	static u8 pkey_pack_u32(u8 dst, u32 val)
	95	{
	96	memcpy(dst, &val, sizeof(val));
	97	return dst + sizeof(val);
	98	}
	99
82f94f24 DH	100	/*
	101	* Query information about a key.
	102	*/
	103	static int software_key_query(const struct kernel_pkey_params *params,
	104	struct kernel_pkey_query *info)
	105	{
	106	struct crypto_akcipher *tfm;
	107	struct public_key *pkey = params->key->payload.data[asym_crypto];
	108	char alg_name[CRYPTO_MAX_ALG_NAME];
f1774cb8	109	u8 key, ptr;
82f94f24 DH	110	int ret, len;
	111
	112	ret = software_key_determine_akcipher(params->encoding,
	113	params->hash_algo,
	114	pkey, alg_name);
	115	if (ret < 0)
	116	return ret;
	117
	118	tfm = crypto_alloc_akcipher(alg_name, 0, 0);
	119	if (IS_ERR(tfm))
	120	return PTR_ERR(tfm);
	121
f1774cb8 VC	122	key = kmalloc(pkey->keylen + sizeof(u32) * 2 + pkey->paramlen,
	123	GFP_KERNEL);
	124	if (!key)
	125	goto error_free_tfm;
	126	memcpy(key, pkey->key, pkey->keylen);
	127	ptr = key + pkey->keylen;
	128	ptr = pkey_pack_u32(ptr, pkey->algo);
	129	ptr = pkey_pack_u32(ptr, pkey->paramlen);
	130	memcpy(ptr, pkey->params, pkey->paramlen);
	131
f7c4e06e	132	if (pkey->key_is_private)
f1774cb8	133	ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
f7c4e06e	134	else
f1774cb8	135	ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
82f94f24	136	if (ret < 0)
f1774cb8	137	goto error_free_key;
82f94f24 DH	138
	139	len = crypto_akcipher_maxsize(tfm);
	140	info->key_size = len * 8;
	141	info->max_data_size = len;
	142	info->max_sig_size = len;
	143	info->max_enc_size = len;
	144	info->max_dec_size = len;
c08fed73 DH	145	info->supported_ops = (KEYCTL_SUPPORTS_ENCRYPT \|
	146	KEYCTL_SUPPORTS_VERIFY);
	147	if (pkey->key_is_private)
	148	info->supported_ops \|= (KEYCTL_SUPPORTS_DECRYPT \|
	149	KEYCTL_SUPPORTS_SIGN);
82f94f24 DH	150	ret = 0;
82f94f24 DH	151
f1774cb8 VC	152	error_free_key:
f1774cb8 VC	153	kfree(key);
82f94f24 DH	154	error_free_tfm:
	155	crypto_free_akcipher(tfm);
	156	pr_devel("<==%s() = %d\n", __func__, ret);
	157	return ret;
	158	}
	159
c08fed73 DH	160	/*
	161	* Do encryption, decryption and signing ops.
	162	*/
	163	static int software_key_eds_op(struct kernel_pkey_params *params,
	164	const void in, void out)
	165	{
	166	const struct public_key *pkey = params->key->payload.data[asym_crypto];
	167	struct akcipher_request *req;
	168	struct crypto_akcipher *tfm;
	169	struct crypto_wait cwait;
	170	struct scatterlist in_sg, out_sg;
	171	char alg_name[CRYPTO_MAX_ALG_NAME];
f1774cb8	172	char key, ptr;
c08fed73 DH	173	int ret;
	174
	175	pr_devel("==>%s()\n", __func__);
	176
	177	ret = software_key_determine_akcipher(params->encoding,
	178	params->hash_algo,
	179	pkey, alg_name);
	180	if (ret < 0)
	181	return ret;
	182
	183	tfm = crypto_alloc_akcipher(alg_name, 0, 0);
	184	if (IS_ERR(tfm))
	185	return PTR_ERR(tfm);
	186
bea37414	187	ret = -ENOMEM;
c08fed73 DH	188	req = akcipher_request_alloc(tfm, GFP_KERNEL);
	189	if (!req)
	190	goto error_free_tfm;
	191
f1774cb8 VC	192	key = kmalloc(pkey->keylen + sizeof(u32) * 2 + pkey->paramlen,
	193	GFP_KERNEL);
	194	if (!key)
	195	goto error_free_req;
	196
	197	memcpy(key, pkey->key, pkey->keylen);
	198	ptr = key + pkey->keylen;
	199	ptr = pkey_pack_u32(ptr, pkey->algo);
	200	ptr = pkey_pack_u32(ptr, pkey->paramlen);
	201	memcpy(ptr, pkey->params, pkey->paramlen);
	202
c08fed73	203	if (pkey->key_is_private)
f1774cb8	204	ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
c08fed73	205	else
f1774cb8	206	ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
c08fed73	207	if (ret)
f1774cb8	208	goto error_free_key;
c08fed73 DH	209
	210	sg_init_one(&in_sg, in, params->in_len);
	211	sg_init_one(&out_sg, out, params->out_len);
	212	akcipher_request_set_crypt(req, &in_sg, &out_sg, params->in_len,
	213	params->out_len);
	214	crypto_init_wait(&cwait);
	215	akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG \|
	216	CRYPTO_TFM_REQ_MAY_SLEEP,
	217	crypto_req_done, &cwait);
	218
	219	/* Perform the encryption calculation. */
	220	switch (params->op) {
	221	case kernel_pkey_encrypt:
	222	ret = crypto_akcipher_encrypt(req);
	223	break;
	224	case kernel_pkey_decrypt:
	225	ret = crypto_akcipher_decrypt(req);
	226	break;
	227	case kernel_pkey_sign:
	228	ret = crypto_akcipher_sign(req);
	229	break;
	230	default:
	231	BUG();
	232	}
	233
	234	ret = crypto_wait_req(ret, &cwait);
	235	if (ret == 0)
	236	ret = req->dst_len;
	237
f1774cb8 VC	238	error_free_key:
f1774cb8 VC	239	kfree(key);
c08fed73 DH	240	error_free_req:
	241	akcipher_request_free(req);
	242	error_free_tfm:
	243	crypto_free_akcipher(tfm);
	244	pr_devel("<==%s() = %d\n", __func__, ret);
	245	return ret;
	246	}
	247
a9681bf3 DH	248	/*
	249	* Verify a signature using a public key.
	250	*/
db6c43bd	251	int public_key_verify_signature(const struct public_key *pkey,
3d167d68	252	const struct public_key_signature *sig)
a9681bf3	253	{
0ca2a04a	254	struct crypto_wait cwait;
d43de6c7 DH	255	struct crypto_akcipher *tfm;
d43de6c7 DH	256	struct akcipher_request *req;
c7381b01	257	struct scatterlist src_sg[2];
82f94f24	258	char alg_name[CRYPTO_MAX_ALG_NAME];
f1774cb8	259	char key, ptr;
72f9a07b	260	int ret;
d43de6c7 DH	261
	262	pr_devel("==>%s()\n", __func__);
	263
db6c43bd	264	BUG_ON(!pkey);
3d167d68	265	BUG_ON(!sig);
db6c43bd	266	BUG_ON(!sig->s);
a9681bf3	267
82f94f24 DH	268	ret = software_key_determine_akcipher(sig->encoding,
	269	sig->hash_algo,
	270	pkey, alg_name);
	271	if (ret < 0)
	272	return ret;
d43de6c7 DH	273
	274	tfm = crypto_alloc_akcipher(alg_name, 0, 0);
	275	if (IS_ERR(tfm))
	276	return PTR_ERR(tfm);
	277
72f9a07b	278	ret = -ENOMEM;
d43de6c7 DH	279	req = akcipher_request_alloc(tfm, GFP_KERNEL);
	280	if (!req)
	281	goto error_free_tfm;
	282
f1774cb8 VC	283	key = kmalloc(pkey->keylen + sizeof(u32) * 2 + pkey->paramlen,
	284	GFP_KERNEL);
	285	if (!key)
	286	goto error_free_req;
	287
	288	memcpy(key, pkey->key, pkey->keylen);
	289	ptr = key + pkey->keylen;
	290	ptr = pkey_pack_u32(ptr, pkey->algo);
	291	ptr = pkey_pack_u32(ptr, pkey->paramlen);
	292	memcpy(ptr, pkey->params, pkey->paramlen);
	293
f7c4e06e	294	if (pkey->key_is_private)
f1774cb8	295	ret = crypto_akcipher_set_priv_key(tfm, key, pkey->keylen);
f7c4e06e	296	else
f1774cb8	297	ret = crypto_akcipher_set_pub_key(tfm, key, pkey->keylen);
d43de6c7	298	if (ret)
f1774cb8	299	goto error_free_key;
d43de6c7	300
c7381b01 VC	301	sg_init_table(src_sg, 2);
c7381b01 VC	302	sg_set_buf(&src_sg[0], sig->s, sig->s_size);
83bc0299	303	sg_set_buf(&src_sg[1], sig->digest, sig->digest_size);
c7381b01 VC	304	akcipher_request_set_crypt(req, src_sg, NULL, sig->s_size,
c7381b01 VC	305	sig->digest_size);
0ca2a04a	306	crypto_init_wait(&cwait);
d43de6c7 DH	307	akcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG \|
d43de6c7 DH	308	CRYPTO_TFM_REQ_MAY_SLEEP,
0ca2a04a	309	crypto_req_done, &cwait);
0ca2a04a	310	ret = crypto_wait_req(crypto_akcipher_verify(req), &cwait);
a9681bf3	311
f1774cb8 VC	312	error_free_key:
f1774cb8 VC	313	kfree(key);
d43de6c7 DH	314	error_free_req:
	315	akcipher_request_free(req);
	316	error_free_tfm:
	317	crypto_free_akcipher(tfm);
	318	pr_devel("<==%s() = %d\n", __func__, ret);
72f9a07b EB	319	if (WARN_ON_ONCE(ret > 0))
72f9a07b EB	320	ret = -EINVAL;
d43de6c7	321	return ret;
3d167d68 DH	322	}
	323	EXPORT_SYMBOL_GPL(public_key_verify_signature);
	324
	325	static int public_key_verify_signature_2(const struct key *key,
	326	const struct public_key_signature *sig)
	327	{
146aa8b1	328	const struct public_key *pk = key->payload.data[asym_crypto];
3d167d68	329	return public_key_verify_signature(pk, sig);
a9681bf3 DH	330	}
	331
	332	/*
	333	* Public key algorithm asymmetric key subtype
	334	*/
	335	struct asymmetric_key_subtype public_key_subtype = {
	336	.owner = THIS_MODULE,
	337	.name = "public_key",
876c6e3e	338	.name_len = sizeof("public_key") - 1,
a9681bf3 DH	339	.describe = public_key_describe,
a9681bf3 DH	340	.destroy = public_key_destroy,
82f94f24	341	.query = software_key_query,
c08fed73	342	.eds_op = software_key_eds_op,
3d167d68	343	.verify_signature = public_key_verify_signature_2,
a9681bf3 DH	344	};
a9681bf3 DH	345	EXPORT_SYMBOL_GPL(public_key_subtype);