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-rw-r--r--src/crypto/fipsmodule/modes/ccm.c256
1 files changed, 0 insertions, 256 deletions
diff --git a/src/crypto/fipsmodule/modes/ccm.c b/src/crypto/fipsmodule/modes/ccm.c
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index 5a153f41..00000000
--- a/src/crypto/fipsmodule/modes/ccm.c
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@@ -1,256 +0,0 @@
-/* ====================================================================
- * 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 <assert.h>
-#include <string.h>
-
-#include <openssl/cpu.h>
-#include <openssl/mem.h>
-
-#include "../../internal.h"
-#include "internal.h"
-
-
-struct ccm128_state {
- union {
- uint64_t u[2];
- uint8_t c[16];
- } nonce, cmac;
-};
-
-int CRYPTO_ccm128_init(CCM128_CONTEXT *ctx, const AES_KEY *key,
- block128_f block, ctr128_f ctr, unsigned M, unsigned L) {
- if (M < 4 || M > 16 || (M & 1) != 0 || L < 2 || L > 8) {
- return 0;
- }
- ctx->block = block;
- ctx->ctr = ctr;
- ctx->M = M;
- ctx->L = L;
- return 1;
-}
-
-size_t CRYPTO_ccm128_max_input(const CCM128_CONTEXT *ctx) {
- return ctx->L >= sizeof(size_t) ? (size_t)-1
- : (((size_t)1) << (ctx->L * 8)) - 1;
-}
-
-static int ccm128_init_state(const CCM128_CONTEXT *ctx,
- struct ccm128_state *state, const AES_KEY *key,
- const uint8_t *nonce, size_t nonce_len,
- const uint8_t *aad, size_t aad_len,
- size_t plaintext_len) {
- const block128_f block = ctx->block;
- const unsigned M = ctx->M;
- const unsigned L = ctx->L;
-
- // |L| determines the expected |nonce_len| and the limit for |plaintext_len|.
- if (plaintext_len > CRYPTO_ccm128_max_input(ctx) ||
- nonce_len != 15 - L) {
- return 0;
- }
-
- // Assemble the first block for computing the MAC.
- OPENSSL_memset(state, 0, sizeof(*state));
- state->nonce.c[0] = (uint8_t)((L - 1) | ((M - 2) / 2) << 3);
- if (aad_len != 0) {
- state->nonce.c[0] |= 0x40; // Set AAD Flag
- }
- OPENSSL_memcpy(&state->nonce.c[1], nonce, nonce_len);
- for (unsigned i = 0; i < L; i++) {
- state->nonce.c[15 - i] = (uint8_t)(plaintext_len >> (8 * i));
- }
-
- (*block)(state->nonce.c, state->cmac.c, key);
- size_t blocks = 1;
-
- if (aad_len != 0) {
- unsigned i;
- // Cast to u64 to avoid the compiler complaining about invalid shifts.
- uint64_t aad_len_u64 = aad_len;
- if (aad_len_u64 < 0x10000 - 0x100) {
- state->cmac.c[0] ^= (uint8_t)(aad_len_u64 >> 8);
- state->cmac.c[1] ^= (uint8_t)aad_len_u64;
- i = 2;
- } else if (aad_len_u64 <= 0xffffffff) {
- state->cmac.c[0] ^= 0xff;
- state->cmac.c[1] ^= 0xfe;
- state->cmac.c[2] ^= (uint8_t)(aad_len_u64 >> 24);
- state->cmac.c[3] ^= (uint8_t)(aad_len_u64 >> 16);
- state->cmac.c[4] ^= (uint8_t)(aad_len_u64 >> 8);
- state->cmac.c[5] ^= (uint8_t)aad_len_u64;
- i = 6;
- } else {
- state->cmac.c[0] ^= 0xff;
- state->cmac.c[1] ^= 0xff;
- state->cmac.c[2] ^= (uint8_t)(aad_len_u64 >> 56);
- state->cmac.c[3] ^= (uint8_t)(aad_len_u64 >> 48);
- state->cmac.c[4] ^= (uint8_t)(aad_len_u64 >> 40);
- state->cmac.c[5] ^= (uint8_t)(aad_len_u64 >> 32);
- state->cmac.c[6] ^= (uint8_t)(aad_len_u64 >> 24);
- state->cmac.c[7] ^= (uint8_t)(aad_len_u64 >> 16);
- state->cmac.c[8] ^= (uint8_t)(aad_len_u64 >> 8);
- state->cmac.c[9] ^= (uint8_t)aad_len_u64;
- i = 10;
- }
-
- do {
- for (; i < 16 && aad_len != 0; i++) {
- state->cmac.c[i] ^= *aad;
- aad++;
- aad_len--;
- }
- (*block)(state->cmac.c, state->cmac.c, key);
- blocks++;
- i = 0;
- } while (aad_len != 0);
- }
-
- // Per RFC 3610, section 2.6, the total number of block cipher operations done
- // must not exceed 2^61. There are two block cipher operations remaining per
- // message block, plus one block at the end to encrypt the MAC.
- size_t remaining_blocks = 2 * ((plaintext_len + 15) / 16) + 1;
- if (plaintext_len + 15 < plaintext_len ||
- remaining_blocks + blocks < blocks ||
- (uint64_t) remaining_blocks + blocks > UINT64_C(1) << 61) {
- return 0;
- }
-
- // Assemble the first block for encrypting and decrypting. The bottom |L|
- // bytes are replaced with a counter and all bit the encoding of |L| is
- // cleared in the first byte.
- state->nonce.c[0] &= 7;
- return 1;
-}
-
-static int ccm128_encrypt(const CCM128_CONTEXT *ctx, struct ccm128_state *state,
- const AES_KEY *key, uint8_t *out, const uint8_t *in,
- size_t len) {
- // The counter for encryption begins at one.
- for (unsigned i = 0; i < ctx->L; i++) {
- state->nonce.c[15 - i] = 0;
- }
- state->nonce.c[15] = 1;
-
- uint8_t partial_buf[16];
- unsigned num = 0;
- if (ctx->ctr != NULL) {
- CRYPTO_ctr128_encrypt_ctr32(in, out, len, key, state->nonce.c, partial_buf,
- &num, ctx->ctr);
- } else {
- CRYPTO_ctr128_encrypt(in, out, len, key, state->nonce.c, partial_buf, &num,
- ctx->block);
- }
- return 1;
-}
-
-static int ccm128_compute_mac(const CCM128_CONTEXT *ctx,
- struct ccm128_state *state, const AES_KEY *key,
- uint8_t *out_tag, size_t tag_len,
- const uint8_t *in, size_t len) {
- block128_f block = ctx->block;
- if (tag_len != ctx->M) {
- return 0;
- }
-
- // Incorporate |in| into the MAC.
- union {
- uint64_t u[2];
- uint8_t c[16];
- } tmp;
- while (len >= 16) {
- OPENSSL_memcpy(tmp.c, in, 16);
- state->cmac.u[0] ^= tmp.u[0];
- state->cmac.u[1] ^= tmp.u[1];
- (*block)(state->cmac.c, state->cmac.c, key);
- in += 16;
- len -= 16;
- }
- if (len > 0) {
- for (size_t i = 0; i < len; i++) {
- state->cmac.c[i] ^= in[i];
- }
- (*block)(state->cmac.c, state->cmac.c, key);
- }
-
- // Encrypt the MAC with counter zero.
- for (unsigned i = 0; i < ctx->L; i++) {
- state->nonce.c[15 - i] = 0;
- }
- (*block)(state->nonce.c, tmp.c, key);
- state->cmac.u[0] ^= tmp.u[0];
- state->cmac.u[1] ^= tmp.u[1];
-
- OPENSSL_memcpy(out_tag, state->cmac.c, tag_len);
- return 1;
-}
-
-int CRYPTO_ccm128_encrypt(const CCM128_CONTEXT *ctx, const AES_KEY *key,
- uint8_t *out, uint8_t *out_tag, size_t tag_len,
- const uint8_t *nonce, size_t nonce_len,
- const uint8_t *in, size_t len, const uint8_t *aad,
- size_t aad_len) {
- struct ccm128_state state;
- return ccm128_init_state(ctx, &state, key, nonce, nonce_len, aad, aad_len,
- len) &&
- ccm128_compute_mac(ctx, &state, key, out_tag, tag_len, in, len) &&
- ccm128_encrypt(ctx, &state, key, out, in, len);
-}
-
-int CRYPTO_ccm128_decrypt(const CCM128_CONTEXT *ctx, const AES_KEY *key,
- uint8_t *out, uint8_t *out_tag, size_t tag_len,
- const uint8_t *nonce, size_t nonce_len,
- const uint8_t *in, size_t len, const uint8_t *aad,
- size_t aad_len) {
- struct ccm128_state state;
- return ccm128_init_state(ctx, &state, key, nonce, nonce_len, aad, aad_len,
- len) &&
- ccm128_encrypt(ctx, &state, key, out, in, len) &&
- ccm128_compute_mac(ctx, &state, key, out_tag, tag_len, out, len);
-}
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