sync with OpenBSD -current

lib/libcrypto/aes/aes.c

@@ -0,0 +1,190 @@
+/* $OpenBSD: aes.c,v 1.1 2024/03/28 00:57:26 jsing Exp $ */
+/* ====================================================================
+ * Copyright (c) 2002-2006 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ */
+
+#include <string.h>
+
+#include <openssl/aes.h>
+#include <openssl/bio.h>
+#include <openssl/modes.h>
+
+static const unsigned char aes_wrap_default_iv[] = {
+	0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6,
+};
+
+/*
+ * The input and output encrypted as though 128bit cfb mode is being
+ * used.  The extra state information to record how much of the
+ * 128bit block we have used is contained in *num;
+ */
+
+void
+AES_cfb128_encrypt(const unsigned char *in, unsigned char *out, size_t length,
+    const AES_KEY *key, unsigned char *ivec, int *num, const int enc)
+{
+	CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc,
+	    (block128_f)AES_encrypt);
+}
+
+/* N.B. This expects the input to be packed, MS bit first */
+void
+AES_cfb1_encrypt(const unsigned char *in, unsigned char *out, size_t length,
+    const AES_KEY *key, unsigned char *ivec, int *num, const int enc)
+{
+	CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc,
+	    (block128_f)AES_encrypt);
+}
+
+void
+AES_cfb8_encrypt(const unsigned char *in, unsigned char *out, size_t length,
+    const AES_KEY *key, unsigned char *ivec, int *num, const int enc)
+{
+	CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc,
+	    (block128_f)AES_encrypt);
+}
+
+void
+AES_ctr128_encrypt(const unsigned char *in, unsigned char *out,
+    size_t length, const AES_KEY *key, unsigned char ivec[AES_BLOCK_SIZE],
+    unsigned char ecount_buf[AES_BLOCK_SIZE], unsigned int *num)
+{
+	CRYPTO_ctr128_encrypt(in, out, length, key, ivec, ecount_buf, num,
+	    (block128_f)AES_encrypt);
+}
+
+void
+AES_ecb_encrypt(const unsigned char *in, unsigned char *out,
+    const AES_KEY *key, const int enc)
+{
+	if (AES_ENCRYPT == enc)
+		AES_encrypt(in, out, key);
+	else
+		AES_decrypt(in, out, key);
+}
+
+void
+AES_ofb128_encrypt(const unsigned char *in, unsigned char *out, size_t length,
+    const AES_KEY *key, unsigned char *ivec, int *num)
+{
+	CRYPTO_ofb128_encrypt(in, out, length, key, ivec, num,
+	    (block128_f)AES_encrypt);
+}
+
+int
+AES_wrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,
+    const unsigned char *in, unsigned int inlen)
+{
+	unsigned char *A, B[16], *R;
+	unsigned int i, j, t;
+
+	if ((inlen & 0x7) || (inlen < 16))
+		return -1;
+	A = B;
+	t = 1;
+	memmove(out + 8, in, inlen);
+	if (!iv)
+		iv = aes_wrap_default_iv;
+
+	memcpy(A, iv, 8);
+
+	for (j = 0; j < 6; j++) {
+		R = out + 8;
+		for (i = 0; i < inlen; i += 8, t++, R += 8) {
+			memcpy(B + 8, R, 8);
+			AES_encrypt(B, B, key);
+			A[7] ^= (unsigned char)(t & 0xff);
+			if (t > 0xff) {
+				A[6] ^= (unsigned char)((t >> 8) & 0xff);
+				A[5] ^= (unsigned char)((t >> 16) & 0xff);
+				A[4] ^= (unsigned char)((t >> 24) & 0xff);
+			}
+			memcpy(R, B + 8, 8);
+		}
+	}
+	memcpy(out, A, 8);
+	return inlen + 8;
+}
+
+int
+AES_unwrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out,
+    const unsigned char *in, unsigned int inlen)
+{
+	unsigned char *A, B[16], *R;
+	unsigned int i, j, t;
+
+	if ((inlen & 0x7) || (inlen < 24))
+		return -1;
+	inlen -= 8;
+	A = B;
+	t = 6 * (inlen >> 3);
+	memcpy(A, in, 8);
+	memmove(out, in + 8, inlen);
+	for (j = 0; j < 6; j++) {
+		R = out + inlen - 8;
+		for (i = 0; i < inlen; i += 8, t--, R -= 8) {
+			A[7] ^= (unsigned char)(t & 0xff);
+			if (t > 0xff) {
+				A[6] ^= (unsigned char)((t >> 8) & 0xff);
+				A[5] ^= (unsigned char)((t >> 16) & 0xff);
+				A[4] ^= (unsigned char)((t >> 24) & 0xff);
+			}
+			memcpy(B + 8, R, 8);
+			AES_decrypt(B, B, key);
+			memcpy(R, B + 8, 8);
+		}
+	}
+	if (!iv)
+		iv = aes_wrap_default_iv;
+	if (memcmp(A, iv, 8)) {
+		explicit_bzero(out, inlen);
+		return 0;
+	}
+	return inlen;
+}