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)  * pcrypt - Parallel crypto wrapper.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2009 secunet Security Networks AG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2009 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 <crypto/algapi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <crypto/internal/aead.h>
^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 <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/init.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/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/kobject.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <crypto/pcrypt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) static struct padata_instance *pencrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) static struct padata_instance *pdecrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static struct kset           *pcrypt_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) struct pcrypt_instance_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	struct crypto_aead_spawn spawn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct padata_shell *psenc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 	struct padata_shell *psdec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	atomic_t tfm_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) struct pcrypt_aead_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	struct crypto_aead *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	unsigned int cb_cpu;
^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) static inline struct pcrypt_instance_ctx *pcrypt_tfm_ictx(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	return aead_instance_ctx(aead_alg_instance(tfm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) static int pcrypt_aead_setkey(struct crypto_aead *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 			      const u8 *key, unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	return crypto_aead_setkey(ctx->child, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) static int pcrypt_aead_setauthsize(struct crypto_aead *parent,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 				   unsigned int authsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	return crypto_aead_setauthsize(ctx->child, authsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) static void pcrypt_aead_serial(struct padata_priv *padata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	struct pcrypt_request *preq = pcrypt_padata_request(padata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	struct aead_request *req = pcrypt_request_ctx(preq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	aead_request_complete(req->base.data, padata->info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) static void pcrypt_aead_done(struct crypto_async_request *areq, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct aead_request *req = areq->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	struct pcrypt_request *preq = aead_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct padata_priv *padata = pcrypt_request_padata(preq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	padata->info = err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	padata_do_serial(padata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) static void pcrypt_aead_enc(struct padata_priv *padata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	struct pcrypt_request *preq = pcrypt_padata_request(padata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	struct aead_request *req = pcrypt_request_ctx(preq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	ret = crypto_aead_encrypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (ret == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	padata->info = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	padata_do_serial(padata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) static int pcrypt_aead_encrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	struct pcrypt_request *preq = aead_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	struct aead_request *creq = pcrypt_request_ctx(preq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct padata_priv *padata = pcrypt_request_padata(preq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	u32 flags = aead_request_flags(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct pcrypt_instance_ctx *ictx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	ictx = pcrypt_tfm_ictx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	memset(padata, 0, sizeof(struct padata_priv));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	padata->parallel = pcrypt_aead_enc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	padata->serial = pcrypt_aead_serial;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	aead_request_set_tfm(creq, ctx->child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 				  pcrypt_aead_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	aead_request_set_crypt(creq, req->src, req->dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			       req->cryptlen, req->iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	aead_request_set_ad(creq, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	err = padata_do_parallel(ictx->psenc, padata, &ctx->cb_cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		return -EINPROGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static void pcrypt_aead_dec(struct padata_priv *padata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	struct pcrypt_request *preq = pcrypt_padata_request(padata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	struct aead_request *req = pcrypt_request_ctx(preq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	ret = crypto_aead_decrypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (ret == -EINPROGRESS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	padata->info = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	padata_do_serial(padata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) static int pcrypt_aead_decrypt(struct aead_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	struct pcrypt_request *preq = aead_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	struct aead_request *creq = pcrypt_request_ctx(preq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	struct padata_priv *padata = pcrypt_request_padata(preq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	u32 flags = aead_request_flags(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	struct pcrypt_instance_ctx *ictx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	ictx = pcrypt_tfm_ictx(aead);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	memset(padata, 0, sizeof(struct padata_priv));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	padata->parallel = pcrypt_aead_dec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	padata->serial = pcrypt_aead_serial;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	aead_request_set_tfm(creq, ctx->child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	aead_request_set_callback(creq, flags & ~CRYPTO_TFM_REQ_MAY_SLEEP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 				  pcrypt_aead_done, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	aead_request_set_crypt(creq, req->src, req->dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			       req->cryptlen, req->iv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	aead_request_set_ad(creq, req->assoclen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	err = padata_do_parallel(ictx->psdec, padata, &ctx->cb_cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		return -EINPROGRESS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static int pcrypt_aead_init_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	int cpu, cpu_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	struct aead_instance *inst = aead_alg_instance(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	struct crypto_aead *cipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) %
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		    cpumask_weight(cpu_online_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	ctx->cb_cpu = cpumask_first(cpu_online_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	for (cpu = 0; cpu < cpu_index; cpu++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	cipher = crypto_spawn_aead(&ictx->spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	if (IS_ERR(cipher))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		return PTR_ERR(cipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	ctx->child = cipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	crypto_aead_set_reqsize(tfm, sizeof(struct pcrypt_request) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 				     sizeof(struct aead_request) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 				     crypto_aead_reqsize(cipher));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static void pcrypt_aead_exit_tfm(struct crypto_aead *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	crypto_free_aead(ctx->child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static void pcrypt_free(struct aead_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	struct pcrypt_instance_ctx *ctx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	crypto_drop_aead(&ctx->spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	padata_free_shell(ctx->psdec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	padata_free_shell(ctx->psenc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	kfree(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int pcrypt_init_instance(struct crypto_instance *inst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 				struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		     "pcrypt(%s)", alg->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		return -ENAMETOOLONG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	memcpy(inst->alg.cra_name, alg->cra_name, CRYPTO_MAX_ALG_NAME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	inst->alg.cra_priority = alg->cra_priority + 100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	inst->alg.cra_blocksize = alg->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	inst->alg.cra_alignmask = alg->cra_alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 			      struct crypto_attr_type *algt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	struct pcrypt_instance_ctx *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	struct aead_instance *inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	struct aead_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	u32 mask = crypto_algt_inherited_mask(algt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	if (!inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	ctx = aead_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	ctx->psenc = padata_alloc_shell(pencrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (!ctx->psenc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	ctx->psdec = padata_alloc_shell(pdecrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	if (!ctx->psdec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 			       crypto_attr_alg_name(tb[1]), 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	alg = crypto_spawn_aead_alg(&ctx->spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	err = pcrypt_init_instance(aead_crypto_instance(inst), &alg->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	inst->alg.ivsize = crypto_aead_alg_ivsize(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	inst->alg.base.cra_ctxsize = sizeof(struct pcrypt_aead_ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	inst->alg.init = pcrypt_aead_init_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	inst->alg.exit = pcrypt_aead_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	inst->alg.setkey = pcrypt_aead_setkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	inst->alg.setauthsize = pcrypt_aead_setauthsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	inst->alg.encrypt = pcrypt_aead_encrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	inst->alg.decrypt = pcrypt_aead_decrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	inst->free = pcrypt_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	err = aead_register_instance(tmpl, inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) err_free_inst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		pcrypt_free(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	struct crypto_attr_type *algt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	algt = crypto_get_attr_type(tb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	if (IS_ERR(algt))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		return PTR_ERR(algt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	case CRYPTO_ALG_TYPE_AEAD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		return pcrypt_create_aead(tmpl, tb, algt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) static int pcrypt_sysfs_add(struct padata_instance *pinst, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	pinst->kobj.kset = pcrypt_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	ret = kobject_add(&pinst->kobj, NULL, "%s", name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 		kobject_uevent(&pinst->kobj, KOBJ_ADD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) static int pcrypt_init_padata(struct padata_instance **pinst, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	int ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	*pinst = padata_alloc(name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	if (!*pinst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	ret = pcrypt_sysfs_add(*pinst, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		padata_free(*pinst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	return ret;
^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 struct crypto_template pcrypt_tmpl = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	.name = "pcrypt",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	.create = pcrypt_create,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	.module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) static int __init pcrypt_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	int err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	pcrypt_kset = kset_create_and_add("pcrypt", NULL, kernel_kobj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	if (!pcrypt_kset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	err = pcrypt_init_padata(&pencrypt, "pencrypt");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 		goto err_unreg_kset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	err = pcrypt_init_padata(&pdecrypt, "pdecrypt");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		goto err_deinit_pencrypt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	return crypto_register_template(&pcrypt_tmpl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) err_deinit_pencrypt:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	padata_free(pencrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) err_unreg_kset:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	kset_unregister(pcrypt_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) static void __exit pcrypt_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	crypto_unregister_template(&pcrypt_tmpl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	padata_free(pencrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	padata_free(pdecrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	kset_unregister(pcrypt_kset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) subsys_initcall(pcrypt_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) module_exit(pcrypt_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) MODULE_DESCRIPTION("Parallel crypto wrapper");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) MODULE_ALIAS_CRYPTO("pcrypt");