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Diffstat (limited to 'thirdparty/openssl/crypto/modes/ccm128.c')
-rw-r--r--thirdparty/openssl/crypto/modes/ccm128.c479
1 files changed, 479 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/modes/ccm128.c b/thirdparty/openssl/crypto/modes/ccm128.c
new file mode 100644
index 0000000000..c1ded0f914
--- /dev/null
+++ b/thirdparty/openssl/crypto/modes/ccm128.c
@@ -0,0 +1,479 @@
+/* ====================================================================
+ * Copyright (c) 2011 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 <openssl/crypto.h>
+#include "modes_lcl.h"
+#include <string.h>
+
+#ifndef MODES_DEBUG
+# ifndef NDEBUG
+# define NDEBUG
+# endif
+#endif
+#include <assert.h>
+
+/*
+ * First you setup M and L parameters and pass the key schedule. This is
+ * called once per session setup...
+ */
+void CRYPTO_ccm128_init(CCM128_CONTEXT *ctx,
+ unsigned int M, unsigned int L, void *key,
+ block128_f block)
+{
+ memset(ctx->nonce.c, 0, sizeof(ctx->nonce.c));
+ ctx->nonce.c[0] = ((u8)(L - 1) & 7) | (u8)(((M - 2) / 2) & 7) << 3;
+ ctx->blocks = 0;
+ ctx->block = block;
+ ctx->key = key;
+}
+
+/* !!! Following interfaces are to be called *once* per packet !!! */
+
+/* Then you setup per-message nonce and pass the length of the message */
+int CRYPTO_ccm128_setiv(CCM128_CONTEXT *ctx,
+ const unsigned char *nonce, size_t nlen, size_t mlen)
+{
+ unsigned int L = ctx->nonce.c[0] & 7; /* the L parameter */
+
+ if (nlen < (14 - L))
+ return -1; /* nonce is too short */
+
+ if (sizeof(mlen) == 8 && L >= 3) {
+ ctx->nonce.c[8] = (u8)(mlen >> (56 % (sizeof(mlen) * 8)));
+ ctx->nonce.c[9] = (u8)(mlen >> (48 % (sizeof(mlen) * 8)));
+ ctx->nonce.c[10] = (u8)(mlen >> (40 % (sizeof(mlen) * 8)));
+ ctx->nonce.c[11] = (u8)(mlen >> (32 % (sizeof(mlen) * 8)));
+ } else
+ ctx->nonce.u[1] = 0;
+
+ ctx->nonce.c[12] = (u8)(mlen >> 24);
+ ctx->nonce.c[13] = (u8)(mlen >> 16);
+ ctx->nonce.c[14] = (u8)(mlen >> 8);
+ ctx->nonce.c[15] = (u8)mlen;
+
+ ctx->nonce.c[0] &= ~0x40; /* clear Adata flag */
+ memcpy(&ctx->nonce.c[1], nonce, 14 - L);
+
+ return 0;
+}
+
+/* Then you pass additional authentication data, this is optional */
+void CRYPTO_ccm128_aad(CCM128_CONTEXT *ctx,
+ const unsigned char *aad, size_t alen)
+{
+ unsigned int i;
+ block128_f block = ctx->block;
+
+ if (alen == 0)
+ return;
+
+ ctx->nonce.c[0] |= 0x40; /* set Adata flag */
+ (*block) (ctx->nonce.c, ctx->cmac.c, ctx->key), ctx->blocks++;
+
+ if (alen < (0x10000 - 0x100)) {
+ ctx->cmac.c[0] ^= (u8)(alen >> 8);
+ ctx->cmac.c[1] ^= (u8)alen;
+ i = 2;
+ } else if (sizeof(alen) == 8
+ && alen >= (size_t)1 << (32 % (sizeof(alen) * 8))) {
+ ctx->cmac.c[0] ^= 0xFF;
+ ctx->cmac.c[1] ^= 0xFF;
+ ctx->cmac.c[2] ^= (u8)(alen >> (56 % (sizeof(alen) * 8)));
+ ctx->cmac.c[3] ^= (u8)(alen >> (48 % (sizeof(alen) * 8)));
+ ctx->cmac.c[4] ^= (u8)(alen >> (40 % (sizeof(alen) * 8)));
+ ctx->cmac.c[5] ^= (u8)(alen >> (32 % (sizeof(alen) * 8)));
+ ctx->cmac.c[6] ^= (u8)(alen >> 24);
+ ctx->cmac.c[7] ^= (u8)(alen >> 16);
+ ctx->cmac.c[8] ^= (u8)(alen >> 8);
+ ctx->cmac.c[9] ^= (u8)alen;
+ i = 10;
+ } else {
+ ctx->cmac.c[0] ^= 0xFF;
+ ctx->cmac.c[1] ^= 0xFE;
+ ctx->cmac.c[2] ^= (u8)(alen >> 24);
+ ctx->cmac.c[3] ^= (u8)(alen >> 16);
+ ctx->cmac.c[4] ^= (u8)(alen >> 8);
+ ctx->cmac.c[5] ^= (u8)alen;
+ i = 6;
+ }
+
+ do {
+ for (; i < 16 && alen; ++i, ++aad, --alen)
+ ctx->cmac.c[i] ^= *aad;
+ (*block) (ctx->cmac.c, ctx->cmac.c, ctx->key), ctx->blocks++;
+ i = 0;
+ } while (alen);
+}
+
+/* Finally you encrypt or decrypt the message */
+
+/*
+ * counter part of nonce may not be larger than L*8 bits, L is not larger
+ * than 8, therefore 64-bit counter...
+ */
+static void ctr64_inc(unsigned char *counter)
+{
+ unsigned int n = 8;
+ u8 c;
+
+ counter += 8;
+ do {
+ --n;
+ c = counter[n];
+ ++c;
+ counter[n] = c;
+ if (c)
+ return;
+ } while (n);
+}
+
+int CRYPTO_ccm128_encrypt(CCM128_CONTEXT *ctx,
+ const unsigned char *inp, unsigned char *out,
+ size_t len)
+{
+ size_t n;
+ unsigned int i, L;
+ unsigned char flags0 = ctx->nonce.c[0];
+ block128_f block = ctx->block;
+ void *key = ctx->key;
+ union {
+ u64 u[2];
+ u8 c[16];
+ } scratch;
+
+ if (!(flags0 & 0x40))
+ (*block) (ctx->nonce.c, ctx->cmac.c, key), ctx->blocks++;
+
+ ctx->nonce.c[0] = L = flags0 & 7;
+ for (n = 0, i = 15 - L; i < 15; ++i) {
+ n |= ctx->nonce.c[i];
+ ctx->nonce.c[i] = 0;
+ n <<= 8;
+ }
+ n |= ctx->nonce.c[15]; /* reconstructed length */
+ ctx->nonce.c[15] = 1;
+
+ if (n != len)
+ return -1; /* length mismatch */
+
+ ctx->blocks += ((len + 15) >> 3) | 1;
+ if (ctx->blocks > (U64(1) << 61))
+ return -2; /* too much data */
+
+ while (len >= 16) {
+#if defined(STRICT_ALIGNMENT)
+ union {
+ u64 u[2];
+ u8 c[16];
+ } temp;
+
+ memcpy(temp.c, inp, 16);
+ ctx->cmac.u[0] ^= temp.u[0];
+ ctx->cmac.u[1] ^= temp.u[1];
+#else
+ ctx->cmac.u[0] ^= ((u64 *)inp)[0];
+ ctx->cmac.u[1] ^= ((u64 *)inp)[1];
+#endif
+ (*block) (ctx->cmac.c, ctx->cmac.c, key);
+ (*block) (ctx->nonce.c, scratch.c, key);
+ ctr64_inc(ctx->nonce.c);
+#if defined(STRICT_ALIGNMENT)
+ temp.u[0] ^= scratch.u[0];
+ temp.u[1] ^= scratch.u[1];
+ memcpy(out, temp.c, 16);
+#else
+ ((u64 *)out)[0] = scratch.u[0] ^ ((u64 *)inp)[0];
+ ((u64 *)out)[1] = scratch.u[1] ^ ((u64 *)inp)[1];
+#endif
+ inp += 16;
+ out += 16;
+ len -= 16;
+ }
+
+ if (len) {
+ for (i = 0; i < len; ++i)
+ ctx->cmac.c[i] ^= inp[i];
+ (*block) (ctx->cmac.c, ctx->cmac.c, key);
+ (*block) (ctx->nonce.c, scratch.c, key);
+ for (i = 0; i < len; ++i)
+ out[i] = scratch.c[i] ^ inp[i];
+ }
+
+ for (i = 15 - L; i < 16; ++i)
+ ctx->nonce.c[i] = 0;
+
+ (*block) (ctx->nonce.c, scratch.c, key);
+ ctx->cmac.u[0] ^= scratch.u[0];
+ ctx->cmac.u[1] ^= scratch.u[1];
+
+ ctx->nonce.c[0] = flags0;
+
+ return 0;
+}
+
+int CRYPTO_ccm128_decrypt(CCM128_CONTEXT *ctx,
+ const unsigned char *inp, unsigned char *out,
+ size_t len)
+{
+ size_t n;
+ unsigned int i, L;
+ unsigned char flags0 = ctx->nonce.c[0];
+ block128_f block = ctx->block;
+ void *key = ctx->key;
+ union {
+ u64 u[2];
+ u8 c[16];
+ } scratch;
+
+ if (!(flags0 & 0x40))
+ (*block) (ctx->nonce.c, ctx->cmac.c, key);
+
+ ctx->nonce.c[0] = L = flags0 & 7;
+ for (n = 0, i = 15 - L; i < 15; ++i) {
+ n |= ctx->nonce.c[i];
+ ctx->nonce.c[i] = 0;
+ n <<= 8;
+ }
+ n |= ctx->nonce.c[15]; /* reconstructed length */
+ ctx->nonce.c[15] = 1;
+
+ if (n != len)
+ return -1;
+
+ while (len >= 16) {
+#if defined(STRICT_ALIGNMENT)
+ union {
+ u64 u[2];
+ u8 c[16];
+ } temp;
+#endif
+ (*block) (ctx->nonce.c, scratch.c, key);
+ ctr64_inc(ctx->nonce.c);
+#if defined(STRICT_ALIGNMENT)
+ memcpy(temp.c, inp, 16);
+ ctx->cmac.u[0] ^= (scratch.u[0] ^= temp.u[0]);
+ ctx->cmac.u[1] ^= (scratch.u[1] ^= temp.u[1]);
+ memcpy(out, scratch.c, 16);
+#else
+ ctx->cmac.u[0] ^= (((u64 *)out)[0] = scratch.u[0] ^ ((u64 *)inp)[0]);
+ ctx->cmac.u[1] ^= (((u64 *)out)[1] = scratch.u[1] ^ ((u64 *)inp)[1]);
+#endif
+ (*block) (ctx->cmac.c, ctx->cmac.c, key);
+
+ inp += 16;
+ out += 16;
+ len -= 16;
+ }
+
+ if (len) {
+ (*block) (ctx->nonce.c, scratch.c, key);
+ for (i = 0; i < len; ++i)
+ ctx->cmac.c[i] ^= (out[i] = scratch.c[i] ^ inp[i]);
+ (*block) (ctx->cmac.c, ctx->cmac.c, key);
+ }
+
+ for (i = 15 - L; i < 16; ++i)
+ ctx->nonce.c[i] = 0;
+
+ (*block) (ctx->nonce.c, scratch.c, key);
+ ctx->cmac.u[0] ^= scratch.u[0];
+ ctx->cmac.u[1] ^= scratch.u[1];
+
+ ctx->nonce.c[0] = flags0;
+
+ return 0;
+}
+
+static void ctr64_add(unsigned char *counter, size_t inc)
+{
+ size_t n = 8, val = 0;
+
+ counter += 8;
+ do {
+ --n;
+ val += counter[n] + (inc & 0xff);
+ counter[n] = (unsigned char)val;
+ val >>= 8; /* carry bit */
+ inc >>= 8;
+ } while (n && (inc || val));
+}
+
+int CRYPTO_ccm128_encrypt_ccm64(CCM128_CONTEXT *ctx,
+ const unsigned char *inp, unsigned char *out,
+ size_t len, ccm128_f stream)
+{
+ size_t n;
+ unsigned int i, L;
+ unsigned char flags0 = ctx->nonce.c[0];
+ block128_f block = ctx->block;
+ void *key = ctx->key;
+ union {
+ u64 u[2];
+ u8 c[16];
+ } scratch;
+
+ if (!(flags0 & 0x40))
+ (*block) (ctx->nonce.c, ctx->cmac.c, key), ctx->blocks++;
+
+ ctx->nonce.c[0] = L = flags0 & 7;
+ for (n = 0, i = 15 - L; i < 15; ++i) {
+ n |= ctx->nonce.c[i];
+ ctx->nonce.c[i] = 0;
+ n <<= 8;
+ }
+ n |= ctx->nonce.c[15]; /* reconstructed length */
+ ctx->nonce.c[15] = 1;
+
+ if (n != len)
+ return -1; /* length mismatch */
+
+ ctx->blocks += ((len + 15) >> 3) | 1;
+ if (ctx->blocks > (U64(1) << 61))
+ return -2; /* too much data */
+
+ if ((n = len / 16)) {
+ (*stream) (inp, out, n, key, ctx->nonce.c, ctx->cmac.c);
+ n *= 16;
+ inp += n;
+ out += n;
+ len -= n;
+ if (len)
+ ctr64_add(ctx->nonce.c, n / 16);
+ }
+
+ if (len) {
+ for (i = 0; i < len; ++i)
+ ctx->cmac.c[i] ^= inp[i];
+ (*block) (ctx->cmac.c, ctx->cmac.c, key);
+ (*block) (ctx->nonce.c, scratch.c, key);
+ for (i = 0; i < len; ++i)
+ out[i] = scratch.c[i] ^ inp[i];
+ }
+
+ for (i = 15 - L; i < 16; ++i)
+ ctx->nonce.c[i] = 0;
+
+ (*block) (ctx->nonce.c, scratch.c, key);
+ ctx->cmac.u[0] ^= scratch.u[0];
+ ctx->cmac.u[1] ^= scratch.u[1];
+
+ ctx->nonce.c[0] = flags0;
+
+ return 0;
+}
+
+int CRYPTO_ccm128_decrypt_ccm64(CCM128_CONTEXT *ctx,
+ const unsigned char *inp, unsigned char *out,
+ size_t len, ccm128_f stream)
+{
+ size_t n;
+ unsigned int i, L;
+ unsigned char flags0 = ctx->nonce.c[0];
+ block128_f block = ctx->block;
+ void *key = ctx->key;
+ union {
+ u64 u[2];
+ u8 c[16];
+ } scratch;
+
+ if (!(flags0 & 0x40))
+ (*block) (ctx->nonce.c, ctx->cmac.c, key);
+
+ ctx->nonce.c[0] = L = flags0 & 7;
+ for (n = 0, i = 15 - L; i < 15; ++i) {
+ n |= ctx->nonce.c[i];
+ ctx->nonce.c[i] = 0;
+ n <<= 8;
+ }
+ n |= ctx->nonce.c[15]; /* reconstructed length */
+ ctx->nonce.c[15] = 1;
+
+ if (n != len)
+ return -1;
+
+ if ((n = len / 16)) {
+ (*stream) (inp, out, n, key, ctx->nonce.c, ctx->cmac.c);
+ n *= 16;
+ inp += n;
+ out += n;
+ len -= n;
+ if (len)
+ ctr64_add(ctx->nonce.c, n / 16);
+ }
+
+ if (len) {
+ (*block) (ctx->nonce.c, scratch.c, key);
+ for (i = 0; i < len; ++i)
+ ctx->cmac.c[i] ^= (out[i] = scratch.c[i] ^ inp[i]);
+ (*block) (ctx->cmac.c, ctx->cmac.c, key);
+ }
+
+ for (i = 15 - L; i < 16; ++i)
+ ctx->nonce.c[i] = 0;
+
+ (*block) (ctx->nonce.c, scratch.c, key);
+ ctx->cmac.u[0] ^= scratch.u[0];
+ ctx->cmac.u[1] ^= scratch.u[1];
+
+ ctx->nonce.c[0] = flags0;
+
+ return 0;
+}
+
+size_t CRYPTO_ccm128_tag(CCM128_CONTEXT *ctx, unsigned char *tag, size_t len)
+{
+ unsigned int M = (ctx->nonce.c[0] >> 3) & 7; /* the M parameter */
+
+ M *= 2;
+ M += 2;
+ if (len < M)
+ return 0;
+ memcpy(tag, ctx->cmac.c, M);
+ return M;
+}
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