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)  * AMD Cryptographic Coprocessor (CCP) AES crypto API support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2013-2019 Advanced Micro Devices, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author: Tom Lendacky <thomas.lendacky@amd.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <crypto/algapi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <crypto/aes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <crypto/ctr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <crypto/scatterwalk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include "ccp-crypto.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static int ccp_aes_complete(struct crypto_async_request *async_req, int ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	struct skcipher_request *req = skcipher_request_cast(async_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	if (ctx->u.aes.mode != CCP_AES_MODE_ECB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 		memcpy(req->iv, rctx->iv, AES_BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) static int ccp_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 			  unsigned int key_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct ccp_crypto_skcipher_alg *alg = ccp_crypto_skcipher_alg(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	switch (key_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	case AES_KEYSIZE_128:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		ctx->u.aes.type = CCP_AES_TYPE_128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	case AES_KEYSIZE_192:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		ctx->u.aes.type = CCP_AES_TYPE_192;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	case AES_KEYSIZE_256:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		ctx->u.aes.type = CCP_AES_TYPE_256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	ctx->u.aes.mode = alg->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	ctx->u.aes.key_len = key_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	memcpy(ctx->u.aes.key, key, key_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	sg_init_one(&ctx->u.aes.key_sg, ctx->u.aes.key, key_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) static int ccp_aes_crypt(struct skcipher_request *req, bool encrypt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	struct scatterlist *iv_sg = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	unsigned int iv_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	if (!ctx->u.aes.key_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	if (((ctx->u.aes.mode == CCP_AES_MODE_ECB) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	     (ctx->u.aes.mode == CCP_AES_MODE_CBC)) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	    (req->cryptlen & (AES_BLOCK_SIZE - 1)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	if (ctx->u.aes.mode != CCP_AES_MODE_ECB) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		if (!req->iv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		memcpy(rctx->iv, req->iv, AES_BLOCK_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		iv_sg = &rctx->iv_sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		iv_len = AES_BLOCK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 		sg_init_one(iv_sg, rctx->iv, iv_len);
^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) 	memset(&rctx->cmd, 0, sizeof(rctx->cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	INIT_LIST_HEAD(&rctx->cmd.entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	rctx->cmd.engine = CCP_ENGINE_AES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	rctx->cmd.u.aes.type = ctx->u.aes.type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	rctx->cmd.u.aes.mode = ctx->u.aes.mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	rctx->cmd.u.aes.action =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		(encrypt) ? CCP_AES_ACTION_ENCRYPT : CCP_AES_ACTION_DECRYPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	rctx->cmd.u.aes.key = &ctx->u.aes.key_sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	rctx->cmd.u.aes.key_len = ctx->u.aes.key_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	rctx->cmd.u.aes.iv = iv_sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	rctx->cmd.u.aes.iv_len = iv_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	rctx->cmd.u.aes.src = req->src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	rctx->cmd.u.aes.src_len = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	rctx->cmd.u.aes.dst = req->dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static int ccp_aes_encrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	return ccp_aes_crypt(req, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static int ccp_aes_decrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	return ccp_aes_crypt(req, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static int ccp_aes_init_tfm(struct crypto_skcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	ctx->complete = ccp_aes_complete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	ctx->u.aes.key_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	crypto_skcipher_set_reqsize(tfm, sizeof(struct ccp_aes_req_ctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	return 0;
^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) static int ccp_aes_rfc3686_complete(struct crypto_async_request *async_req,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 				    int ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct skcipher_request *req = skcipher_request_cast(async_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	/* Restore the original pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	req->iv = rctx->rfc3686_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	return ccp_aes_complete(async_req, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static int ccp_aes_rfc3686_setkey(struct crypto_skcipher *tfm, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 				  unsigned int key_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	if (key_len < CTR_RFC3686_NONCE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	key_len -= CTR_RFC3686_NONCE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	memcpy(ctx->u.aes.nonce, key + key_len, CTR_RFC3686_NONCE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	return ccp_aes_setkey(tfm, key, key_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static int ccp_aes_rfc3686_crypt(struct skcipher_request *req, bool encrypt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	u8 *iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	/* Initialize the CTR block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	iv = rctx->rfc3686_iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	memcpy(iv, ctx->u.aes.nonce, CTR_RFC3686_NONCE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	iv += CTR_RFC3686_NONCE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	memcpy(iv, req->iv, CTR_RFC3686_IV_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	iv += CTR_RFC3686_IV_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	*(__be32 *)iv = cpu_to_be32(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	/* Point to the new IV */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	rctx->rfc3686_info = req->iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	req->iv = rctx->rfc3686_iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	return ccp_aes_crypt(req, encrypt);
^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 ccp_aes_rfc3686_encrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	return ccp_aes_rfc3686_crypt(req, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int ccp_aes_rfc3686_decrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	return ccp_aes_rfc3686_crypt(req, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static int ccp_aes_rfc3686_init_tfm(struct crypto_skcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	ctx->complete = ccp_aes_rfc3686_complete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	ctx->u.aes.key_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	crypto_skcipher_set_reqsize(tfm, sizeof(struct ccp_aes_req_ctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	return 0;
^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 const struct skcipher_alg ccp_aes_defaults = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	.setkey			= ccp_aes_setkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	.encrypt		= ccp_aes_encrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	.decrypt		= ccp_aes_decrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	.min_keysize		= AES_MIN_KEY_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	.max_keysize		= AES_MAX_KEY_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	.init			= ccp_aes_init_tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	.base.cra_flags		= CRYPTO_ALG_ASYNC |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 				  CRYPTO_ALG_ALLOCATES_MEMORY |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 				  CRYPTO_ALG_KERN_DRIVER_ONLY |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 				  CRYPTO_ALG_NEED_FALLBACK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	.base.cra_blocksize	= AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	.base.cra_ctxsize	= sizeof(struct ccp_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	.base.cra_priority	= CCP_CRA_PRIORITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	.base.cra_module	= THIS_MODULE,
^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 const struct skcipher_alg ccp_aes_rfc3686_defaults = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	.setkey			= ccp_aes_rfc3686_setkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	.encrypt		= ccp_aes_rfc3686_encrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	.decrypt		= ccp_aes_rfc3686_decrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	.min_keysize		= AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	.max_keysize		= AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	.init			= ccp_aes_rfc3686_init_tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	.base.cra_flags		= CRYPTO_ALG_ASYNC |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 				  CRYPTO_ALG_ALLOCATES_MEMORY |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 				  CRYPTO_ALG_KERN_DRIVER_ONLY |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 				  CRYPTO_ALG_NEED_FALLBACK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	.base.cra_blocksize	= CTR_RFC3686_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	.base.cra_ctxsize	= sizeof(struct ccp_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	.base.cra_priority	= CCP_CRA_PRIORITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	.base.cra_module	= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct ccp_aes_def {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	enum ccp_aes_mode mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	unsigned int version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	const char *driver_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	unsigned int blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	unsigned int ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	const struct skcipher_alg *alg_defaults;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static struct ccp_aes_def aes_algs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		.mode		= CCP_AES_MODE_ECB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 		.version	= CCP_VERSION(3, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		.name		= "ecb(aes)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		.driver_name	= "ecb-aes-ccp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		.blocksize	= AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		.ivsize		= 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 		.alg_defaults	= &ccp_aes_defaults,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		.mode		= CCP_AES_MODE_CBC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		.version	= CCP_VERSION(3, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		.name		= "cbc(aes)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		.driver_name	= "cbc-aes-ccp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		.blocksize	= AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		.ivsize		= AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		.alg_defaults	= &ccp_aes_defaults,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		.mode		= CCP_AES_MODE_CFB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		.version	= CCP_VERSION(3, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		.name		= "cfb(aes)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		.driver_name	= "cfb-aes-ccp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		.blocksize	= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 		.ivsize		= AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		.alg_defaults	= &ccp_aes_defaults,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		.mode		= CCP_AES_MODE_OFB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		.version	= CCP_VERSION(3, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		.name		= "ofb(aes)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		.driver_name	= "ofb-aes-ccp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		.blocksize	= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		.ivsize		= AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		.alg_defaults	= &ccp_aes_defaults,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		.mode		= CCP_AES_MODE_CTR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		.version	= CCP_VERSION(3, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		.name		= "ctr(aes)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		.driver_name	= "ctr-aes-ccp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 		.blocksize	= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		.ivsize		= AES_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		.alg_defaults	= &ccp_aes_defaults,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 		.mode		= CCP_AES_MODE_CTR,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 		.version	= CCP_VERSION(3, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 		.name		= "rfc3686(ctr(aes))",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		.driver_name	= "rfc3686-ctr-aes-ccp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		.blocksize	= 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		.ivsize		= CTR_RFC3686_IV_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		.alg_defaults	= &ccp_aes_rfc3686_defaults,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static int ccp_register_aes_alg(struct list_head *head,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 				const struct ccp_aes_def *def)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	struct ccp_crypto_skcipher_alg *ccp_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	struct skcipher_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	if (!ccp_alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	INIT_LIST_HEAD(&ccp_alg->entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	ccp_alg->mode = def->mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	/* Copy the defaults and override as necessary */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	alg = &ccp_alg->alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	*alg = *def->alg_defaults;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		 def->driver_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	alg->base.cra_blocksize = def->blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	alg->ivsize = def->ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	ret = crypto_register_skcipher(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		pr_err("%s skcipher algorithm registration error (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		       alg->base.cra_name, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		kfree(ccp_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	list_add(&ccp_alg->entry, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) int ccp_register_aes_algs(struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	unsigned int ccpversion = ccp_version();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	for (i = 0; i < ARRAY_SIZE(aes_algs); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 		if (aes_algs[i].version > ccpversion)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		ret = ccp_register_aes_alg(head, &aes_algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }