1 // SPDX-License-Identifier: GPL-2.0-only
3  * AMD Cryptographic Coprocessor (CCP) AES GCM crypto API support
17 #include <crypto/aes.h>
19 #include <crypto/gcm.h>
22 #include "ccp-crypto.h"
36 		ctx->u.aes.type = CCP_AES_TYPE_128;  in ccp_aes_gcm_setkey()
39 		ctx->u.aes.type = CCP_AES_TYPE_192;  in ccp_aes_gcm_setkey()
42 		ctx->u.aes.type = CCP_AES_TYPE_256;  in ccp_aes_gcm_setkey()
45 		return -EINVAL;  in ccp_aes_gcm_setkey()
48 	ctx->u.aes.mode = CCP_AES_MODE_GCM;  in ccp_aes_gcm_setkey()
49 	ctx->u.aes.key_len = key_len;  in ccp_aes_gcm_setkey()
51 	memcpy(ctx->u.aes.key, key, key_len);  in ccp_aes_gcm_setkey()
52 	sg_init_one(&ctx->u.aes.key_sg, ctx->u.aes.key, key_len);  in ccp_aes_gcm_setkey()
70 		return -EINVAL;  in ccp_aes_gcm_setauthsize()
86 	if (!ctx->u.aes.key_len)  in ccp_aes_gcm_crypt()
87 		return -EINVAL;  in ccp_aes_gcm_crypt()
89 	if (ctx->u.aes.mode != CCP_AES_MODE_GCM)  in ccp_aes_gcm_crypt()
90 		return -EINVAL;  in ccp_aes_gcm_crypt()
92 	if (!req->iv)  in ccp_aes_gcm_crypt()
93 		return -EINVAL;  in ccp_aes_gcm_crypt()
105 	memcpy(rctx->iv, req->iv, GCM_AES_IV_SIZE);  in ccp_aes_gcm_crypt()
107 		rctx->iv[i + GCM_AES_IV_SIZE] = 0;  in ccp_aes_gcm_crypt()
108 	rctx->iv[AES_BLOCK_SIZE - 1] = 1;  in ccp_aes_gcm_crypt()
111 	iv_sg = &rctx->iv_sg;  in ccp_aes_gcm_crypt()
113 	sg_init_one(iv_sg, rctx->iv, iv_len);  in ccp_aes_gcm_crypt()
116 	memset(&rctx->cmd, 0, sizeof(rctx->cmd));  in ccp_aes_gcm_crypt()
117 	INIT_LIST_HEAD(&rctx->cmd.entry);  in ccp_aes_gcm_crypt()
118 	rctx->cmd.engine = CCP_ENGINE_AES;  in ccp_aes_gcm_crypt()
119 	rctx->cmd.u.aes.authsize = crypto_aead_authsize(tfm);  in ccp_aes_gcm_crypt()
120 	rctx->cmd.u.aes.type = ctx->u.aes.type;  in ccp_aes_gcm_crypt()
121 	rctx->cmd.u.aes.mode = ctx->u.aes.mode;  in ccp_aes_gcm_crypt()
122 	rctx->cmd.u.aes.action = encrypt;  in ccp_aes_gcm_crypt()
123 	rctx->cmd.u.aes.key = &ctx->u.aes.key_sg;  in ccp_aes_gcm_crypt()
124 	rctx->cmd.u.aes.key_len = ctx->u.aes.key_len;  in ccp_aes_gcm_crypt()
125 	rctx->cmd.u.aes.iv = iv_sg;  in ccp_aes_gcm_crypt()
126 	rctx->cmd.u.aes.iv_len = iv_len;  in ccp_aes_gcm_crypt()
127 	rctx->cmd.u.aes.src = req->src;  in ccp_aes_gcm_crypt()
128 	rctx->cmd.u.aes.src_len = req->cryptlen;  in ccp_aes_gcm_crypt()
129 	rctx->cmd.u.aes.aad_len = req->assoclen;  in ccp_aes_gcm_crypt()
132 	rctx->cmd.u.aes.dst = req->dst;  in ccp_aes_gcm_crypt()
134 	ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);  in ccp_aes_gcm_crypt()
153 	ctx->complete = ccp_aes_gcm_complete;  in ccp_aes_gcm_cra_init()
154 	ctx->u.aes.key_len = 0;  in ccp_aes_gcm_cra_init()
200 		.name		= "gcm(aes)",
201 		.driver_name	= "gcm-aes-ccp",
217 		return -ENOMEM;  in ccp_register_aes_aead()
219 	INIT_LIST_HEAD(&ccp_aead->entry);  in ccp_register_aes_aead()
221 	ccp_aead->mode = def->mode;  in ccp_register_aes_aead()
224 	alg = &ccp_aead->alg;  in ccp_register_aes_aead()
225 	*alg = *def->alg_defaults;  in ccp_register_aes_aead()
226 	snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);  in ccp_register_aes_aead()
227 	snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",  in ccp_register_aes_aead()
228 		 def->driver_name);  in ccp_register_aes_aead()
229 	alg->base.cra_blocksize = def->blocksize;  in ccp_register_aes_aead()
234 		       alg->base.cra_name, ret);  in ccp_register_aes_aead()
239 	list_add(&ccp_aead->entry, head);  in ccp_register_aes_aead()