961f59ff57
Avoids growing the result of hardware bignum operations (particularly for multiplication) Fixes bugs where some Elliptic Curve operations fail or corrupt memory, as they assume length of the number is never greater than the number of non-zero limbs. Includes some general refactoring to standardize terminology. Closes https://github.com/espressif/esp-idf/issues/1556 Fixes TW12984 Adds test cases for both these issues.
78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/* mbedTLS Elliptic Curve functionality tests
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Focus on testing functionality where we use ESP32 hardware
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accelerated crypto features.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <esp_system.h>
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#include <mbedtls/entropy.h>
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#include <mbedtls/ctr_drbg.h>
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#include <mbedtls/ecdh.h>
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#include <mbedtls/ecdsa.h>
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#include <mbedtls/error.h>
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#include "unity.h"
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/* Note: negative value here so that assert message prints a grep-able
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error hex value (mbedTLS uses -N for error codes) */
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#define TEST_ASSERT_MBEDTLS_OK(X) TEST_ASSERT_EQUAL_HEX32(0, -(X))
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TEST_CASE("mbedtls ECDH Generate Key", "[mbedtls]")
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{
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mbedtls_ecdh_context ctx;
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mbedtls_entropy_context entropy;
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mbedtls_ctr_drbg_context ctr_drbg;
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mbedtls_ecdh_init(&ctx);
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mbedtls_ctr_drbg_init(&ctr_drbg);
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mbedtls_entropy_init(&entropy);
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TEST_ASSERT_MBEDTLS_OK( mbedtls_ctr_drbg_seed(&ctr_drbg, mbedtls_entropy_func, &entropy, NULL, 0) );
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TEST_ASSERT_MBEDTLS_OK( mbedtls_ecp_group_load(&ctx.grp, MBEDTLS_ECP_DP_CURVE25519) );
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TEST_ASSERT_MBEDTLS_OK( mbedtls_ecdh_gen_public(&ctx.grp, &ctx.d, &ctx.Q,
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mbedtls_ctr_drbg_random, &ctr_drbg ) );
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mbedtls_ecdh_free(&ctx);
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mbedtls_ctr_drbg_free(&ctr_drbg);
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mbedtls_entropy_free(&entropy);
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}
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TEST_CASE("mbedtls ECP self-tests", "[mbedtls]")
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{
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TEST_ASSERT_EQUAL(0, mbedtls_ecp_self_test(1));
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}
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TEST_CASE("mbedtls ECP mul w/ koblitz", "[mbedtls]")
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{
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/* Test case code via https://github.com/espressif/esp-idf/issues/1556 */
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mbedtls_entropy_context ctxEntropy;
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mbedtls_ctr_drbg_context ctxRandom;
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mbedtls_ecdsa_context ctxECDSA;
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const char* pers = "myecdsa";
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mbedtls_entropy_init(&ctxEntropy);
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mbedtls_ctr_drbg_init(&ctxRandom);
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TEST_ASSERT_MBEDTLS_OK( mbedtls_ctr_drbg_seed(&ctxRandom, mbedtls_entropy_func, &ctxEntropy,
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(const unsigned char*) pers, strlen(pers)) );
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mbedtls_ecdsa_init(&ctxECDSA);
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TEST_ASSERT_MBEDTLS_OK( mbedtls_ecdsa_genkey(&ctxECDSA, MBEDTLS_ECP_DP_SECP256K1,
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mbedtls_ctr_drbg_random, &ctxRandom) );
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TEST_ASSERT_MBEDTLS_OK(mbedtls_ecp_mul(&ctxECDSA.grp, &ctxECDSA.Q, &ctxECDSA.d, &ctxECDSA.grp.G,
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mbedtls_ctr_drbg_random, &ctxRandom) );
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mbedtls_ecdsa_free(&ctxECDSA);
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mbedtls_ctr_drbg_free(&ctxRandom);
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mbedtls_entropy_free(&ctxEntropy);
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}
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