1 files changed, 128 insertions, 0 deletions
diff --git a/module/icp/algs/modes/ecb.c b/module/icp/algs/modes/ecb.c
new file mode 100644
index 000000000000..025f5825cf04
--- /dev/null
+++ b/module/icp/algs/modes/ecb.c
@@ -0,0 +1,128 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include <sys/zfs_context.h>
+#include <modes/modes.h>
+#include <sys/crypto/common.h>
+#include <sys/crypto/impl.h>
+
+/*
+ * Algorithm independent ECB functions.
+ */
+int
+ecb_cipher_contiguous_blocks(ecb_ctx_t *ctx, char *data, size_t length,
+    crypto_data_t *out, size_t block_size,
+    int (*cipher)(const void *ks, const uint8_t *pt, uint8_t *ct))
+{
+	size_t remainder = length;
+	size_t need = 0;
+	uint8_t *datap = (uint8_t *)data;
+	uint8_t *blockp;
+	uint8_t *lastp;
+	void *iov_or_mp;
+	offset_t offset;
+	uint8_t *out_data_1;
+	uint8_t *out_data_2;
+	size_t out_data_1_len;
+
+	if (length + ctx->ecb_remainder_len < block_size) {
+		/* accumulate bytes here and return */
+		bcopy(datap,
+		    (uint8_t *)ctx->ecb_remainder + ctx->ecb_remainder_len,
+		    length);
+		ctx->ecb_remainder_len += length;
+		ctx->ecb_copy_to = datap;
+		return (CRYPTO_SUCCESS);
+	}
+
+	lastp = (uint8_t *)ctx->ecb_iv;
+	crypto_init_ptrs(out, &iov_or_mp, &offset);
+
+	do {
+		/* Unprocessed data from last call. */
+		if (ctx->ecb_remainder_len > 0) {
+			need = block_size - ctx->ecb_remainder_len;
+
+			if (need > remainder)
+				return (CRYPTO_DATA_LEN_RANGE);
+
+			bcopy(datap, &((uint8_t *)ctx->ecb_remainder)
+			    [ctx->ecb_remainder_len], need);
+
+			blockp = (uint8_t *)ctx->ecb_remainder;
+		} else {
+			blockp = datap;
+		}
+
+		cipher(ctx->ecb_keysched, blockp, lastp);
+		crypto_get_ptrs(out, &iov_or_mp, &offset, &out_data_1,
+		    &out_data_1_len, &out_data_2, block_size);
+
+		/* copy block to where it belongs */
+		bcopy(lastp, out_data_1, out_data_1_len);
+		if (out_data_2 != NULL) {
+			bcopy(lastp + out_data_1_len, out_data_2,
+			    block_size - out_data_1_len);
+		}
+		/* update offset */
+		out->cd_offset += block_size;
+
+		/* Update pointer to next block of data to be processed. */
+		if (ctx->ecb_remainder_len != 0) {
+			datap += need;
+			ctx->ecb_remainder_len = 0;
+		} else {
+			datap += block_size;
+		}
+
+		remainder = (size_t)&data[length] - (size_t)datap;
+
+		/* Incomplete last block. */
+		if (remainder > 0 && remainder < block_size) {
+			bcopy(datap, ctx->ecb_remainder, remainder);
+			ctx->ecb_remainder_len = remainder;
+			ctx->ecb_copy_to = datap;
+			goto out;
+		}
+		ctx->ecb_copy_to = NULL;
+
+	} while (remainder > 0);
+
+out:
+	return (CRYPTO_SUCCESS);
+}
+
+/* ARGSUSED */
+void *
+ecb_alloc_ctx(int kmflag)
+{
+	ecb_ctx_t *ecb_ctx;
+
+	if ((ecb_ctx = kmem_zalloc(sizeof (ecb_ctx_t), kmflag)) == NULL)
+		return (NULL);
+
+	ecb_ctx->ecb_flags = ECB_MODE;
+	return (ecb_ctx);
+}