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) RSA 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) 2017 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: Gary R Hook <gary.hook@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/scatterlist.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <crypto/algapi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <crypto/internal/rsa.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <crypto/internal/akcipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <crypto/akcipher.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 inline struct akcipher_request *akcipher_request_cast(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	struct crypto_async_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	return container_of(req, struct akcipher_request, base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) static inline int ccp_copy_and_save_keypart(u8 **kpbuf, unsigned int *kplen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 					    const u8 *buf, size_t sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	int nskip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	for (nskip = 0; nskip < sz; nskip++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 		if (buf[nskip])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	*kplen = sz - nskip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	*kpbuf = kmemdup(buf + nskip, *kplen, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	if (!*kpbuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) static int ccp_rsa_complete(struct crypto_async_request *async_req, int ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	struct akcipher_request *req = akcipher_request_cast(async_req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	struct ccp_rsa_req_ctx *rctx = akcipher_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	req->dst_len = rctx->cmd.u.rsa.key_size >> 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static unsigned int ccp_rsa_maxsize(struct crypto_akcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	struct ccp_ctx *ctx = akcipher_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	return ctx->u.rsa.n_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) static int ccp_rsa_crypt(struct akcipher_request *req, bool encrypt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	struct ccp_ctx *ctx = akcipher_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	struct ccp_rsa_req_ctx *rctx = akcipher_request_ctx(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	memset(&rctx->cmd, 0, sizeof(rctx->cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	INIT_LIST_HEAD(&rctx->cmd.entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	rctx->cmd.engine = CCP_ENGINE_RSA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	rctx->cmd.u.rsa.key_size = ctx->u.rsa.key_len; /* in bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	if (encrypt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		rctx->cmd.u.rsa.exp = &ctx->u.rsa.e_sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		rctx->cmd.u.rsa.exp_len = ctx->u.rsa.e_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		rctx->cmd.u.rsa.exp = &ctx->u.rsa.d_sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		rctx->cmd.u.rsa.exp_len = ctx->u.rsa.d_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	rctx->cmd.u.rsa.mod = &ctx->u.rsa.n_sg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	rctx->cmd.u.rsa.mod_len = ctx->u.rsa.n_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	rctx->cmd.u.rsa.src = req->src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	rctx->cmd.u.rsa.src_len = req->src_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	rctx->cmd.u.rsa.dst = req->dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) static int ccp_rsa_encrypt(struct akcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	return ccp_rsa_crypt(req, true);
^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 ccp_rsa_decrypt(struct akcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	return ccp_rsa_crypt(req, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static int ccp_check_key_length(unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	/* In bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	if (len < 8 || len > 4096)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	return 0;
^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 void ccp_rsa_free_key_bufs(struct ccp_ctx *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	/* Clean up old key data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	kfree_sensitive(ctx->u.rsa.e_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	ctx->u.rsa.e_buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	ctx->u.rsa.e_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	kfree_sensitive(ctx->u.rsa.n_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	ctx->u.rsa.n_buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	ctx->u.rsa.n_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	kfree_sensitive(ctx->u.rsa.d_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	ctx->u.rsa.d_buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	ctx->u.rsa.d_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static int ccp_rsa_setkey(struct crypto_akcipher *tfm, const void *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			  unsigned int keylen, bool private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	struct ccp_ctx *ctx = akcipher_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	struct rsa_key raw_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	ccp_rsa_free_key_bufs(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	memset(&raw_key, 0, sizeof(raw_key));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	/* Code borrowed from crypto/rsa.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	if (private)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		ret = rsa_parse_priv_key(&raw_key, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		ret = rsa_parse_pub_key(&raw_key, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		goto n_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	ret = ccp_copy_and_save_keypart(&ctx->u.rsa.n_buf, &ctx->u.rsa.n_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 					raw_key.n, raw_key.n_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		goto key_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	sg_init_one(&ctx->u.rsa.n_sg, ctx->u.rsa.n_buf, ctx->u.rsa.n_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	ctx->u.rsa.key_len = ctx->u.rsa.n_len << 3; /* convert to bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	if (ccp_check_key_length(ctx->u.rsa.key_len)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		goto key_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	ret = ccp_copy_and_save_keypart(&ctx->u.rsa.e_buf, &ctx->u.rsa.e_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 					raw_key.e, raw_key.e_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		goto key_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	sg_init_one(&ctx->u.rsa.e_sg, ctx->u.rsa.e_buf, ctx->u.rsa.e_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	if (private) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		ret = ccp_copy_and_save_keypart(&ctx->u.rsa.d_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 						&ctx->u.rsa.d_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 						raw_key.d, raw_key.d_sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			goto key_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		sg_init_one(&ctx->u.rsa.d_sg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			    ctx->u.rsa.d_buf, ctx->u.rsa.d_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) key_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	ccp_rsa_free_key_bufs(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) n_key:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static int ccp_rsa_setprivkey(struct crypto_akcipher *tfm, const void *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			      unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	return ccp_rsa_setkey(tfm, key, keylen, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) static int ccp_rsa_setpubkey(struct crypto_akcipher *tfm, const void *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 			     unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	return ccp_rsa_setkey(tfm, key, keylen, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) static int ccp_rsa_init_tfm(struct crypto_akcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	struct ccp_ctx *ctx = akcipher_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	akcipher_set_reqsize(tfm, sizeof(struct ccp_rsa_req_ctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	ctx->complete = ccp_rsa_complete;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static void ccp_rsa_exit_tfm(struct crypto_akcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	struct ccp_ctx *ctx = crypto_tfm_ctx(&tfm->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	ccp_rsa_free_key_bufs(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) static struct akcipher_alg ccp_rsa_defaults = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	.encrypt = ccp_rsa_encrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	.decrypt = ccp_rsa_decrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	.set_pub_key = ccp_rsa_setpubkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	.set_priv_key = ccp_rsa_setprivkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	.max_size = ccp_rsa_maxsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	.init = ccp_rsa_init_tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	.exit = ccp_rsa_exit_tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	.base = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		.cra_name = "rsa",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		.cra_driver_name = "rsa-ccp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		.cra_priority = CCP_CRA_PRIORITY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		.cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		.cra_ctxsize = 2 * sizeof(struct ccp_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) struct ccp_rsa_def {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	unsigned int version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	const char *name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	const char *driver_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	unsigned int reqsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	struct akcipher_alg *alg_defaults;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) static struct ccp_rsa_def rsa_algs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		.version	= CCP_VERSION(3, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		.name		= "rsa",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 		.driver_name	= "rsa-ccp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		.reqsize	= sizeof(struct ccp_rsa_req_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 		.alg_defaults	= &ccp_rsa_defaults,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static int ccp_register_rsa_alg(struct list_head *head,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 			        const struct ccp_rsa_def *def)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	struct ccp_crypto_akcipher_alg *ccp_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	struct akcipher_alg *alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	if (!ccp_alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	INIT_LIST_HEAD(&ccp_alg->entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	alg = &ccp_alg->alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	*alg = *def->alg_defaults;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		 def->driver_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	ret = crypto_register_akcipher(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		pr_err("%s akcipher algorithm registration error (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		       alg->base.cra_name, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 		kfree(ccp_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	list_add(&ccp_alg->entry, head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) int ccp_register_rsa_algs(struct list_head *head)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	unsigned int ccpversion = ccp_version();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	/* Register the RSA algorithm in standard mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	 * This works for CCP v3 and later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	for (i = 0; i < ARRAY_SIZE(rsa_algs); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 		if (rsa_algs[i].version > ccpversion)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		ret = ccp_register_rsa_alg(head, &rsa_algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }