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Commit ccebcf3f authored by Gary R Hook's avatar Gary R Hook Committed by Herbert Xu
Browse files

crypto: ccp - Add SHA-2 384- and 512-bit support 



Incorporate 384-bit and 512-bit hashing for a version 5 CCP
device

Signed-off-by: default avatarGary R Hook <gary.hook@amd.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 146c8688

drivers/crypto/ccp/ccp-crypto-sha.c

+22 −0
Original line number Diff line number Diff line
@@ -146,6 +146,12 @@ static int ccp_do_sha_update(struct ahash_request *req, unsigned int nbytes, 
	case CCP_SHA_TYPE_256:

		rctx->cmd.u.sha.ctx_len = SHA256_DIGEST_SIZE;

		break;

	case CCP_SHA_TYPE_384:

		rctx->cmd.u.sha.ctx_len = SHA384_DIGEST_SIZE;

		break;

	case CCP_SHA_TYPE_512:

		rctx->cmd.u.sha.ctx_len = SHA512_DIGEST_SIZE;

		break;

	default:

		/* Should never get here */

		break;
@@ -393,6 +399,22 @@ static struct ccp_sha_def sha_algs[] = { 
		.digest_size	= SHA256_DIGEST_SIZE,

		.block_size	= SHA256_BLOCK_SIZE,

	},

	{

		.version	= CCP_VERSION(5, 0),

		.name		= "sha384",

		.drv_name	= "sha384-ccp",

		.type		= CCP_SHA_TYPE_384,

		.digest_size	= SHA384_DIGEST_SIZE,

		.block_size	= SHA384_BLOCK_SIZE,

	},

	{

		.version	= CCP_VERSION(5, 0),

		.name		= "sha512",

		.drv_name	= "sha512-ccp",

		.type		= CCP_SHA_TYPE_512,

		.digest_size	= SHA512_DIGEST_SIZE,

		.block_size	= SHA512_BLOCK_SIZE,

	},

};



static int ccp_register_hmac_alg(struct list_head *head,

drivers/crypto/ccp/ccp-crypto.h

+5 −3
Original line number Diff line number Diff line
@@ -137,9 +137,11 @@ struct ccp_aes_cmac_exp_ctx { 
	u8 buf[AES_BLOCK_SIZE];

};



/***** SHA related defines *****/

#define MAX_SHA_CONTEXT_SIZE	SHA256_DIGEST_SIZE

#define MAX_SHA_BLOCK_SIZE	SHA256_BLOCK_SIZE

/* SHA-related defines

 * These values must be large enough to accommodate any variant

 */

#define MAX_SHA_CONTEXT_SIZE	SHA512_DIGEST_SIZE

#define MAX_SHA_BLOCK_SIZE	SHA512_BLOCK_SIZE



struct ccp_sha_ctx {

	struct scatterlist opad_sg;

drivers/crypto/ccp/ccp-ops.c

+72 −0
Original line number Diff line number Diff line
@@ -41,6 +41,20 @@ static const __be32 ccp_sha256_init[SHA256_DIGEST_SIZE / sizeof(__be32)] = { 
	cpu_to_be32(SHA256_H6), cpu_to_be32(SHA256_H7),

};



static const __be64 ccp_sha384_init[SHA512_DIGEST_SIZE / sizeof(__be64)] = {

	cpu_to_be64(SHA384_H0), cpu_to_be64(SHA384_H1),

	cpu_to_be64(SHA384_H2), cpu_to_be64(SHA384_H3),

	cpu_to_be64(SHA384_H4), cpu_to_be64(SHA384_H5),

	cpu_to_be64(SHA384_H6), cpu_to_be64(SHA384_H7),

};



static const __be64 ccp_sha512_init[SHA512_DIGEST_SIZE / sizeof(__be64)] = {

	cpu_to_be64(SHA512_H0), cpu_to_be64(SHA512_H1),

	cpu_to_be64(SHA512_H2), cpu_to_be64(SHA512_H3),

	cpu_to_be64(SHA512_H4), cpu_to_be64(SHA512_H5),

	cpu_to_be64(SHA512_H6), cpu_to_be64(SHA512_H7),

};



#define	CCP_NEW_JOBID(ccp)	((ccp->vdata->version == CCP_VERSION(3, 0)) ? \

					ccp_gen_jobid(ccp) : 0)
@@ -955,6 +969,18 @@ static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) 
			return -EINVAL;

		block_size = SHA256_BLOCK_SIZE;

		break;

	case CCP_SHA_TYPE_384:

		if (cmd_q->ccp->vdata->version < CCP_VERSION(4, 0)

		    || sha->ctx_len < SHA384_DIGEST_SIZE)

			return -EINVAL;

		block_size = SHA384_BLOCK_SIZE;

		break;

	case CCP_SHA_TYPE_512:

		if (cmd_q->ccp->vdata->version < CCP_VERSION(4, 0)

		    || sha->ctx_len < SHA512_DIGEST_SIZE)

			return -EINVAL;

		block_size = SHA512_BLOCK_SIZE;

		break;

	default:

		return -EINVAL;

	}
@@ -1042,6 +1068,21 @@ static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) 
		sb_count = 1;

		ooffset = ioffset = 0;

		break;

	case CCP_SHA_TYPE_384:

		digest_size = SHA384_DIGEST_SIZE;

		init = (void *) ccp_sha384_init;

		ctx_size = SHA512_DIGEST_SIZE;

		sb_count = 2;

		ioffset = 0;

		ooffset = 2 * CCP_SB_BYTES - SHA384_DIGEST_SIZE;

		break;

	case CCP_SHA_TYPE_512:

		digest_size = SHA512_DIGEST_SIZE;

		init = (void *) ccp_sha512_init;

		ctx_size = SHA512_DIGEST_SIZE;

		sb_count = 2;

		ooffset = ioffset = 0;

		break;

	default:

		ret = -EINVAL;

		goto e_data;
@@ -1060,6 +1101,11 @@ static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) 
	op.u.sha.type = sha->type;

	op.u.sha.msg_bits = sha->msg_bits;



	/* For SHA1/224/256 the context fits in a single (32-byte) SB entry;

	 * SHA384/512 require 2 adjacent SB slots, with the right half in the

	 * first slot, and the left half in the second. Each portion must then

	 * be in little endian format: use the 256-bit byte swap option.

	 */

	ret = ccp_init_dm_workarea(&ctx, cmd_q, sb_count * CCP_SB_BYTES,

				   DMA_BIDIRECTIONAL);

	if (ret)
@@ -1071,6 +1117,13 @@ static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) 
		case CCP_SHA_TYPE_256:

			memcpy(ctx.address + ioffset, init, ctx_size);

			break;

		case CCP_SHA_TYPE_384:

		case CCP_SHA_TYPE_512:

			memcpy(ctx.address + ctx_size / 2, init,

			       ctx_size / 2);

			memcpy(ctx.address, init + ctx_size / 2,

			       ctx_size / 2);

			break;

		default:

			ret = -EINVAL;

			goto e_ctx;
@@ -1137,6 +1190,15 @@ static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) 
					sha->ctx, 0,

					digest_size);

			break;

		case CCP_SHA_TYPE_384:

		case CCP_SHA_TYPE_512:

			ccp_get_dm_area(&ctx, 0,

					sha->ctx, LSB_ITEM_SIZE - ooffset,

					LSB_ITEM_SIZE);

			ccp_get_dm_area(&ctx, LSB_ITEM_SIZE + ooffset,

					sha->ctx, 0,

					LSB_ITEM_SIZE - ooffset);

			break;

		default:

			ret = -EINVAL;

			goto e_ctx;
@@ -1174,6 +1236,16 @@ static int ccp_run_sha_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd) 
			       ctx.address + ooffset,

			       digest_size);

			break;

		case CCP_SHA_TYPE_384:

		case CCP_SHA_TYPE_512:

			memcpy(hmac_buf + block_size,

			       ctx.address + LSB_ITEM_SIZE + ooffset,

			       LSB_ITEM_SIZE);

			memcpy(hmac_buf + block_size +

			       (LSB_ITEM_SIZE - ooffset),

			       ctx.address,

			       LSB_ITEM_SIZE);

			break;

		default:

			ret = -EINVAL;

			goto e_ctx;

include/linux/ccp.h

+2 −0
Original line number Diff line number Diff line
@@ -249,6 +249,8 @@ enum ccp_sha_type { 
	CCP_SHA_TYPE_1 = 1,

	CCP_SHA_TYPE_224,

	CCP_SHA_TYPE_256,

	CCP_SHA_TYPE_384,

	CCP_SHA_TYPE_512,

	CCP_SHA_TYPE__LAST,

};