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-rw-r--r--tf-psa-crypto/drivers/builtin/src/ccm.c763
1 files changed, 763 insertions, 0 deletions
diff --git a/tf-psa-crypto/drivers/builtin/src/ccm.c b/tf-psa-crypto/drivers/builtin/src/ccm.c
new file mode 100644
index 0000000..45ed697
--- /dev/null
+++ b/tf-psa-crypto/drivers/builtin/src/ccm.c
@@ -0,0 +1,763 @@
+/*
+ * NIST SP800-38C compliant CCM implementation
+ *
+ * Copyright The Mbed TLS Contributors
+ * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+/*
+ * Definition of CCM:
+ * http://csrc.nist.gov/publications/nistpubs/800-38C/SP800-38C_updated-July20_2007.pdf
+ * RFC 3610 "Counter with CBC-MAC (CCM)"
+ *
+ * Related:
+ * RFC 5116 "An Interface and Algorithms for Authenticated Encryption"
+ */
+
+#include "common.h"
+
+#if defined(MBEDTLS_CCM_C)
+
+#include "mbedtls/ccm.h"
+#include "mbedtls/platform_util.h"
+#include "mbedtls/error.h"
+#include "mbedtls/constant_time.h"
+
+#if defined(MBEDTLS_BLOCK_CIPHER_C)
+#include "block_cipher_internal.h"
+#endif
+
+#include <string.h>
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#else
+#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_AES_C)
+#include <stdio.h>
+#define mbedtls_printf printf
+#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
+#endif /* MBEDTLS_PLATFORM_C */
+
+#if !defined(MBEDTLS_CCM_ALT)
+
+
+/*
+ * Initialize context
+ */
+void mbedtls_ccm_init(mbedtls_ccm_context *ctx)
+{
+ memset(ctx, 0, sizeof(mbedtls_ccm_context));
+}
+
+int mbedtls_ccm_setkey(mbedtls_ccm_context *ctx,
+ mbedtls_cipher_id_t cipher,
+ const unsigned char *key,
+ unsigned int keybits)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+
+#if defined(MBEDTLS_BLOCK_CIPHER_C)
+ mbedtls_block_cipher_free(&ctx->block_cipher_ctx);
+
+ if ((ret = mbedtls_block_cipher_setup(&ctx->block_cipher_ctx, cipher)) != 0) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ if ((ret = mbedtls_block_cipher_setkey(&ctx->block_cipher_ctx, key, keybits)) != 0) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+#else
+ const mbedtls_cipher_info_t *cipher_info;
+
+ cipher_info = mbedtls_cipher_info_from_values(cipher, keybits,
+ MBEDTLS_MODE_ECB);
+ if (cipher_info == NULL) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ if (mbedtls_cipher_info_get_block_size(cipher_info) != 16) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ mbedtls_cipher_free(&ctx->cipher_ctx);
+
+ if ((ret = mbedtls_cipher_setup(&ctx->cipher_ctx, cipher_info)) != 0) {
+ return ret;
+ }
+
+ if ((ret = mbedtls_cipher_setkey(&ctx->cipher_ctx, key, keybits,
+ MBEDTLS_ENCRYPT)) != 0) {
+ return ret;
+ }
+#endif
+
+ return ret;
+}
+
+/*
+ * Free context
+ */
+void mbedtls_ccm_free(mbedtls_ccm_context *ctx)
+{
+ if (ctx == NULL) {
+ return;
+ }
+#if defined(MBEDTLS_BLOCK_CIPHER_C)
+ mbedtls_block_cipher_free(&ctx->block_cipher_ctx);
+#else
+ mbedtls_cipher_free(&ctx->cipher_ctx);
+#endif
+ mbedtls_platform_zeroize(ctx, sizeof(mbedtls_ccm_context));
+}
+
+#define CCM_STATE__CLEAR 0
+#define CCM_STATE__STARTED (1 << 0)
+#define CCM_STATE__LENGTHS_SET (1 << 1)
+#define CCM_STATE__AUTH_DATA_STARTED (1 << 2)
+#define CCM_STATE__AUTH_DATA_FINISHED (1 << 3)
+#define CCM_STATE__ERROR (1 << 4)
+
+/*
+ * Encrypt or decrypt a partial block with CTR
+ */
+static int mbedtls_ccm_crypt(mbedtls_ccm_context *ctx,
+ size_t offset, size_t use_len,
+ const unsigned char *input,
+ unsigned char *output)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ unsigned char tmp_buf[16] = { 0 };
+
+#if defined(MBEDTLS_BLOCK_CIPHER_C)
+ ret = mbedtls_block_cipher_encrypt(&ctx->block_cipher_ctx, ctx->ctr, tmp_buf);
+#else
+ size_t olen = 0;
+ ret = mbedtls_cipher_update(&ctx->cipher_ctx, ctx->ctr, 16, tmp_buf, &olen);
+#endif
+ if (ret != 0) {
+ ctx->state |= CCM_STATE__ERROR;
+ mbedtls_platform_zeroize(tmp_buf, sizeof(tmp_buf));
+ return ret;
+ }
+
+ mbedtls_xor(output, input, tmp_buf + offset, use_len);
+
+ mbedtls_platform_zeroize(tmp_buf, sizeof(tmp_buf));
+ return ret;
+}
+
+static void mbedtls_ccm_clear_state(mbedtls_ccm_context *ctx)
+{
+ ctx->state = CCM_STATE__CLEAR;
+ memset(ctx->y, 0, 16);
+ memset(ctx->ctr, 0, 16);
+}
+
+static int ccm_calculate_first_block_if_ready(mbedtls_ccm_context *ctx)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ unsigned char i;
+ size_t len_left;
+#if !defined(MBEDTLS_BLOCK_CIPHER_C)
+ size_t olen;
+#endif
+
+ /* length calculation can be done only after both
+ * mbedtls_ccm_starts() and mbedtls_ccm_set_lengths() have been executed
+ */
+ if (!(ctx->state & CCM_STATE__STARTED) || !(ctx->state & CCM_STATE__LENGTHS_SET)) {
+ return 0;
+ }
+
+ /* CCM expects non-empty tag.
+ * CCM* allows empty tag. For CCM* without tag, ignore plaintext length.
+ */
+ if (ctx->tag_len == 0) {
+ if (ctx->mode == MBEDTLS_CCM_STAR_ENCRYPT || ctx->mode == MBEDTLS_CCM_STAR_DECRYPT) {
+ ctx->plaintext_len = 0;
+ } else {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+ }
+
+ /*
+ * First block:
+ * 0 .. 0 flags
+ * 1 .. iv_len nonce (aka iv) - set by: mbedtls_ccm_starts()
+ * iv_len+1 .. 15 length
+ *
+ * With flags as (bits):
+ * 7 0
+ * 6 add present?
+ * 5 .. 3 (t - 2) / 2
+ * 2 .. 0 q - 1
+ */
+ ctx->y[0] |= (ctx->add_len > 0) << 6;
+ ctx->y[0] |= ((ctx->tag_len - 2) / 2) << 3;
+ ctx->y[0] |= ctx->q - 1;
+
+ for (i = 0, len_left = ctx->plaintext_len; i < ctx->q; i++, len_left >>= 8) {
+ ctx->y[15-i] = MBEDTLS_BYTE_0(len_left);
+ }
+
+ if (len_left > 0) {
+ ctx->state |= CCM_STATE__ERROR;
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ /* Start CBC-MAC with first block*/
+#if defined(MBEDTLS_BLOCK_CIPHER_C)
+ ret = mbedtls_block_cipher_encrypt(&ctx->block_cipher_ctx, ctx->y, ctx->y);
+#else
+ ret = mbedtls_cipher_update(&ctx->cipher_ctx, ctx->y, 16, ctx->y, &olen);
+#endif
+ if (ret != 0) {
+ ctx->state |= CCM_STATE__ERROR;
+ return ret;
+ }
+
+ return 0;
+}
+
+int mbedtls_ccm_starts(mbedtls_ccm_context *ctx,
+ int mode,
+ const unsigned char *iv,
+ size_t iv_len)
+{
+ /* Also implies q is within bounds */
+ if (iv_len < 7 || iv_len > 13) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ ctx->mode = mode;
+ ctx->q = 16 - 1 - (unsigned char) iv_len;
+
+ /*
+ * Prepare counter block for encryption:
+ * 0 .. 0 flags
+ * 1 .. iv_len nonce (aka iv)
+ * iv_len+1 .. 15 counter (initially 1)
+ *
+ * With flags as (bits):
+ * 7 .. 3 0
+ * 2 .. 0 q - 1
+ */
+ memset(ctx->ctr, 0, 16);
+ ctx->ctr[0] = ctx->q - 1;
+ memcpy(ctx->ctr + 1, iv, iv_len);
+ memset(ctx->ctr + 1 + iv_len, 0, ctx->q);
+ ctx->ctr[15] = 1;
+
+ /*
+ * See ccm_calculate_first_block_if_ready() for block layout description
+ */
+ memcpy(ctx->y + 1, iv, iv_len);
+
+ ctx->state |= CCM_STATE__STARTED;
+ return ccm_calculate_first_block_if_ready(ctx);
+}
+
+int mbedtls_ccm_set_lengths(mbedtls_ccm_context *ctx,
+ size_t total_ad_len,
+ size_t plaintext_len,
+ size_t tag_len)
+{
+ /*
+ * Check length requirements: SP800-38C A.1
+ * Additional requirement: a < 2^16 - 2^8 to simplify the code.
+ * 'length' checked later (when writing it to the first block)
+ *
+ * Also, loosen the requirements to enable support for CCM* (IEEE 802.15.4).
+ */
+ if (tag_len == 2 || tag_len > 16 || tag_len % 2 != 0) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ if (total_ad_len >= 0xFF00) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ ctx->plaintext_len = plaintext_len;
+ ctx->add_len = total_ad_len;
+ ctx->tag_len = tag_len;
+ ctx->processed = 0;
+
+ ctx->state |= CCM_STATE__LENGTHS_SET;
+ return ccm_calculate_first_block_if_ready(ctx);
+}
+
+int mbedtls_ccm_update_ad(mbedtls_ccm_context *ctx,
+ const unsigned char *add,
+ size_t add_len)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ size_t use_len, offset;
+#if !defined(MBEDTLS_BLOCK_CIPHER_C)
+ size_t olen;
+#endif
+
+ if (ctx->state & CCM_STATE__ERROR) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ if (add_len > 0) {
+ if (ctx->state & CCM_STATE__AUTH_DATA_FINISHED) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ if (!(ctx->state & CCM_STATE__AUTH_DATA_STARTED)) {
+ if (add_len > ctx->add_len) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ ctx->y[0] ^= (unsigned char) ((ctx->add_len >> 8) & 0xFF);
+ ctx->y[1] ^= (unsigned char) ((ctx->add_len) & 0xFF);
+
+ ctx->state |= CCM_STATE__AUTH_DATA_STARTED;
+ } else if (ctx->processed + add_len > ctx->add_len) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ while (add_len > 0) {
+ offset = (ctx->processed + 2) % 16; /* account for y[0] and y[1]
+ * holding total auth data length */
+ use_len = 16 - offset;
+
+ if (use_len > add_len) {
+ use_len = add_len;
+ }
+
+ mbedtls_xor(ctx->y + offset, ctx->y + offset, add, use_len);
+
+ ctx->processed += use_len;
+ add_len -= use_len;
+ add += use_len;
+
+ if (use_len + offset == 16 || ctx->processed == ctx->add_len) {
+#if defined(MBEDTLS_BLOCK_CIPHER_C)
+ ret = mbedtls_block_cipher_encrypt(&ctx->block_cipher_ctx, ctx->y, ctx->y);
+#else
+ ret = mbedtls_cipher_update(&ctx->cipher_ctx, ctx->y, 16, ctx->y, &olen);
+#endif
+ if (ret != 0) {
+ ctx->state |= CCM_STATE__ERROR;
+ return ret;
+ }
+ }
+ }
+
+ if (ctx->processed == ctx->add_len) {
+ ctx->state |= CCM_STATE__AUTH_DATA_FINISHED;
+ ctx->processed = 0; // prepare for mbedtls_ccm_update()
+ }
+ }
+
+ return 0;
+}
+
+int mbedtls_ccm_update(mbedtls_ccm_context *ctx,
+ const unsigned char *input, size_t input_len,
+ unsigned char *output, size_t output_size,
+ size_t *output_len)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ unsigned char i;
+ size_t use_len, offset;
+#if !defined(MBEDTLS_BLOCK_CIPHER_C)
+ size_t olen;
+#endif
+
+ unsigned char local_output[16];
+
+ if (ctx->state & CCM_STATE__ERROR) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ /* Check against plaintext length only if performing operation with
+ * authentication
+ */
+ if (ctx->tag_len != 0 && ctx->processed + input_len > ctx->plaintext_len) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ if (output_size < input_len) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+ *output_len = input_len;
+
+ ret = 0;
+
+ while (input_len > 0) {
+ offset = ctx->processed % 16;
+
+ use_len = 16 - offset;
+
+ if (use_len > input_len) {
+ use_len = input_len;
+ }
+
+ ctx->processed += use_len;
+
+ if (ctx->mode == MBEDTLS_CCM_ENCRYPT || \
+ ctx->mode == MBEDTLS_CCM_STAR_ENCRYPT) {
+ mbedtls_xor(ctx->y + offset, ctx->y + offset, input, use_len);
+
+ if (use_len + offset == 16 || ctx->processed == ctx->plaintext_len) {
+#if defined(MBEDTLS_BLOCK_CIPHER_C)
+ ret = mbedtls_block_cipher_encrypt(&ctx->block_cipher_ctx, ctx->y, ctx->y);
+#else
+ ret = mbedtls_cipher_update(&ctx->cipher_ctx, ctx->y, 16, ctx->y, &olen);
+#endif
+ if (ret != 0) {
+ ctx->state |= CCM_STATE__ERROR;
+ goto exit;
+ }
+ }
+
+ ret = mbedtls_ccm_crypt(ctx, offset, use_len, input, output);
+ if (ret != 0) {
+ goto exit;
+ }
+ }
+
+ if (ctx->mode == MBEDTLS_CCM_DECRYPT || \
+ ctx->mode == MBEDTLS_CCM_STAR_DECRYPT) {
+ /* Since output may be in shared memory, we cannot be sure that
+ * it will contain what we wrote to it. Therefore, we should avoid using
+ * it as input to any operations.
+ * Write decrypted data to local_output to avoid using output variable as
+ * input in the XOR operation for Y.
+ */
+ ret = mbedtls_ccm_crypt(ctx, offset, use_len, input, local_output);
+ if (ret != 0) {
+ goto exit;
+ }
+
+ mbedtls_xor(ctx->y + offset, ctx->y + offset, local_output, use_len);
+
+ memcpy(output, local_output, use_len);
+
+ if (use_len + offset == 16 || ctx->processed == ctx->plaintext_len) {
+#if defined(MBEDTLS_BLOCK_CIPHER_C)
+ ret = mbedtls_block_cipher_encrypt(&ctx->block_cipher_ctx, ctx->y, ctx->y);
+#else
+ ret = mbedtls_cipher_update(&ctx->cipher_ctx, ctx->y, 16, ctx->y, &olen);
+#endif
+ if (ret != 0) {
+ ctx->state |= CCM_STATE__ERROR;
+ goto exit;
+ }
+ }
+ }
+
+ if (use_len + offset == 16 || ctx->processed == ctx->plaintext_len) {
+ for (i = 0; i < ctx->q; i++) {
+ if (++(ctx->ctr)[15-i] != 0) {
+ break;
+ }
+ }
+ }
+
+ input_len -= use_len;
+ input += use_len;
+ output += use_len;
+ }
+
+exit:
+ mbedtls_platform_zeroize(local_output, 16);
+
+ return ret;
+}
+
+int mbedtls_ccm_finish(mbedtls_ccm_context *ctx,
+ unsigned char *tag, size_t tag_len)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ unsigned char i;
+
+ if (ctx->state & CCM_STATE__ERROR) {
+ return MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ }
+
+ if (ctx->add_len > 0 && !(ctx->state & CCM_STATE__AUTH_DATA_FINISHED)) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ if (ctx->plaintext_len > 0 && ctx->processed != ctx->plaintext_len) {
+ return MBEDTLS_ERR_CCM_BAD_INPUT;
+ }
+
+ /*
+ * Authentication: reset counter and crypt/mask internal tag
+ */
+ for (i = 0; i < ctx->q; i++) {
+ ctx->ctr[15-i] = 0;
+ }
+
+ ret = mbedtls_ccm_crypt(ctx, 0, 16, ctx->y, ctx->y);
+ if (ret != 0) {
+ return ret;
+ }
+ if (tag != NULL) {
+ memcpy(tag, ctx->y, tag_len);
+ }
+ mbedtls_ccm_clear_state(ctx);
+
+ return 0;
+}
+
+/*
+ * Authenticated encryption or decryption
+ */
+static int ccm_auth_crypt(mbedtls_ccm_context *ctx, int mode, size_t length,
+ const unsigned char *iv, size_t iv_len,
+ const unsigned char *add, size_t add_len,
+ const unsigned char *input, unsigned char *output,
+ unsigned char *tag, size_t tag_len)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ size_t olen;
+
+ if ((ret = mbedtls_ccm_starts(ctx, mode, iv, iv_len)) != 0) {
+ return ret;
+ }
+
+ if ((ret = mbedtls_ccm_set_lengths(ctx, add_len, length, tag_len)) != 0) {
+ return ret;
+ }
+
+ if ((ret = mbedtls_ccm_update_ad(ctx, add, add_len)) != 0) {
+ return ret;
+ }
+
+ if ((ret = mbedtls_ccm_update(ctx, input, length,
+ output, length, &olen)) != 0) {
+ return ret;
+ }
+
+ if ((ret = mbedtls_ccm_finish(ctx, tag, tag_len)) != 0) {
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * Authenticated encryption
+ */
+int mbedtls_ccm_star_encrypt_and_tag(mbedtls_ccm_context *ctx, size_t length,
+ const unsigned char *iv, size_t iv_len,
+ const unsigned char *add, size_t add_len,
+ const unsigned char *input, unsigned char *output,
+ unsigned char *tag, size_t tag_len)
+{
+ return ccm_auth_crypt(ctx, MBEDTLS_CCM_STAR_ENCRYPT, length, iv, iv_len,
+ add, add_len, input, output, tag, tag_len);
+}
+
+int mbedtls_ccm_encrypt_and_tag(mbedtls_ccm_context *ctx, size_t length,
+ const unsigned char *iv, size_t iv_len,
+ const unsigned char *add, size_t add_len,
+ const unsigned char *input, unsigned char *output,
+ unsigned char *tag, size_t tag_len)
+{
+ return ccm_auth_crypt(ctx, MBEDTLS_CCM_ENCRYPT, length, iv, iv_len,
+ add, add_len, input, output, tag, tag_len);
+}
+
+/*
+ * Authenticated decryption
+ */
+static int mbedtls_ccm_compare_tags(const unsigned char *tag1,
+ const unsigned char *tag2,
+ size_t tag_len)
+{
+ /* Check tag in "constant-time" */
+ int diff = mbedtls_ct_memcmp(tag1, tag2, tag_len);
+
+ if (diff != 0) {
+ return MBEDTLS_ERR_CCM_AUTH_FAILED;
+ }
+
+ return 0;
+}
+
+static int ccm_auth_decrypt(mbedtls_ccm_context *ctx, int mode, size_t length,
+ const unsigned char *iv, size_t iv_len,
+ const unsigned char *add, size_t add_len,
+ const unsigned char *input, unsigned char *output,
+ const unsigned char *tag, size_t tag_len)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ unsigned char check_tag[16];
+
+ if ((ret = ccm_auth_crypt(ctx, mode, length,
+ iv, iv_len, add, add_len,
+ input, output, check_tag, tag_len)) != 0) {
+ return ret;
+ }
+
+ if ((ret = mbedtls_ccm_compare_tags(tag, check_tag, tag_len)) != 0) {
+ mbedtls_platform_zeroize(output, length);
+ return ret;
+ }
+
+ return 0;
+}
+
+int mbedtls_ccm_star_auth_decrypt(mbedtls_ccm_context *ctx, size_t length,
+ const unsigned char *iv, size_t iv_len,
+ const unsigned char *add, size_t add_len,
+ const unsigned char *input, unsigned char *output,
+ const unsigned char *tag, size_t tag_len)
+{
+ return ccm_auth_decrypt(ctx, MBEDTLS_CCM_STAR_DECRYPT, length,
+ iv, iv_len, add, add_len,
+ input, output, tag, tag_len);
+}
+
+int mbedtls_ccm_auth_decrypt(mbedtls_ccm_context *ctx, size_t length,
+ const unsigned char *iv, size_t iv_len,
+ const unsigned char *add, size_t add_len,
+ const unsigned char *input, unsigned char *output,
+ const unsigned char *tag, size_t tag_len)
+{
+ return ccm_auth_decrypt(ctx, MBEDTLS_CCM_DECRYPT, length,
+ iv, iv_len, add, add_len,
+ input, output, tag, tag_len);
+}
+#endif /* !MBEDTLS_CCM_ALT */
+
+#if defined(MBEDTLS_SELF_TEST) && defined(MBEDTLS_CCM_GCM_CAN_AES)
+/*
+ * Examples 1 to 3 from SP800-38C Appendix C
+ */
+
+#define NB_TESTS 3
+#define CCM_SELFTEST_PT_MAX_LEN 24
+#define CCM_SELFTEST_CT_MAX_LEN 32
+/*
+ * The data is the same for all tests, only the used length changes
+ */
+static const unsigned char key_test_data[] = {
+ 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f
+};
+
+static const unsigned char iv_test_data[] = {
+ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+ 0x18, 0x19, 0x1a, 0x1b
+};
+
+static const unsigned char ad_test_data[] = {
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+ 0x10, 0x11, 0x12, 0x13
+};
+
+static const unsigned char msg_test_data[CCM_SELFTEST_PT_MAX_LEN] = {
+ 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+};
+
+static const size_t iv_len_test_data[NB_TESTS] = { 7, 8, 12 };
+static const size_t add_len_test_data[NB_TESTS] = { 8, 16, 20 };
+static const size_t msg_len_test_data[NB_TESTS] = { 4, 16, 24 };
+static const size_t tag_len_test_data[NB_TESTS] = { 4, 6, 8 };
+
+static const unsigned char res_test_data[NB_TESTS][CCM_SELFTEST_CT_MAX_LEN] = {
+ { 0x71, 0x62, 0x01, 0x5b, 0x4d, 0xac, 0x25, 0x5d },
+ { 0xd2, 0xa1, 0xf0, 0xe0, 0x51, 0xea, 0x5f, 0x62,
+ 0x08, 0x1a, 0x77, 0x92, 0x07, 0x3d, 0x59, 0x3d,
+ 0x1f, 0xc6, 0x4f, 0xbf, 0xac, 0xcd },
+ { 0xe3, 0xb2, 0x01, 0xa9, 0xf5, 0xb7, 0x1a, 0x7a,
+ 0x9b, 0x1c, 0xea, 0xec, 0xcd, 0x97, 0xe7, 0x0b,
+ 0x61, 0x76, 0xaa, 0xd9, 0xa4, 0x42, 0x8a, 0xa5,
+ 0x48, 0x43, 0x92, 0xfb, 0xc1, 0xb0, 0x99, 0x51 }
+};
+
+int mbedtls_ccm_self_test(int verbose)
+{
+ mbedtls_ccm_context ctx;
+ /*
+ * Some hardware accelerators require the input and output buffers
+ * would be in RAM, because the flash is not accessible.
+ * Use buffers on the stack to hold the test vectors data.
+ */
+ unsigned char plaintext[CCM_SELFTEST_PT_MAX_LEN];
+ unsigned char ciphertext[CCM_SELFTEST_CT_MAX_LEN];
+ size_t i;
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+
+ mbedtls_ccm_init(&ctx);
+
+ if (mbedtls_ccm_setkey(&ctx, MBEDTLS_CIPHER_ID_AES, key_test_data,
+ 8 * sizeof(key_test_data)) != 0) {
+ if (verbose != 0) {
+ mbedtls_printf(" CCM: setup failed");
+ }
+
+ return 1;
+ }
+
+ for (i = 0; i < NB_TESTS; i++) {
+ if (verbose != 0) {
+ mbedtls_printf(" CCM-AES #%u: ", (unsigned int) i + 1);
+ }
+
+ memset(plaintext, 0, CCM_SELFTEST_PT_MAX_LEN);
+ memset(ciphertext, 0, CCM_SELFTEST_CT_MAX_LEN);
+ memcpy(plaintext, msg_test_data, msg_len_test_data[i]);
+
+ ret = mbedtls_ccm_encrypt_and_tag(&ctx, msg_len_test_data[i],
+ iv_test_data, iv_len_test_data[i],
+ ad_test_data, add_len_test_data[i],
+ plaintext, ciphertext,
+ ciphertext + msg_len_test_data[i],
+ tag_len_test_data[i]);
+
+ if (ret != 0 ||
+ memcmp(ciphertext, res_test_data[i],
+ msg_len_test_data[i] + tag_len_test_data[i]) != 0) {
+ if (verbose != 0) {
+ mbedtls_printf("failed\n");
+ }
+
+ return 1;
+ }
+ memset(plaintext, 0, CCM_SELFTEST_PT_MAX_LEN);
+
+ ret = mbedtls_ccm_auth_decrypt(&ctx, msg_len_test_data[i],
+ iv_test_data, iv_len_test_data[i],
+ ad_test_data, add_len_test_data[i],
+ ciphertext, plaintext,
+ ciphertext + msg_len_test_data[i],
+ tag_len_test_data[i]);
+
+ if (ret != 0 ||
+ memcmp(plaintext, msg_test_data, msg_len_test_data[i]) != 0) {
+ if (verbose != 0) {
+ mbedtls_printf("failed\n");
+ }
+
+ return 1;
+ }
+
+ if (verbose != 0) {
+ mbedtls_printf("passed\n");
+ }
+ }
+
+ mbedtls_ccm_free(&ctx);
+
+ if (verbose != 0) {
+ mbedtls_printf("\n");
+ }
+
+ return 0;
+}
+
+#endif /* MBEDTLS_SELF_TEST && MBEDTLS_AES_C */
+
+#endif /* MBEDTLS_CCM_C */
generated by cgit v1.1 at 2024-07-11 11:26:33 +0000