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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/external/mbedtls/yotta/data/example-hashing/main.cpp')
-rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/external/mbedtls/yotta/data/example-hashing/main.cpp | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/mbedtls/yotta/data/example-hashing/main.cpp b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/mbedtls/yotta/data/example-hashing/main.cpp new file mode 100644 index 0000000..574152a --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/mbedtls/yotta/data/example-hashing/main.cpp @@ -0,0 +1,177 @@ +/* + * Hello world example of using the hashing functions of mbed TLS + * + * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved + * SPDX-License-Identifier: Apache-2.0 + * + * Licensed under the Apache License, Version 2.0 (the "License"); you may + * not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT + * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * This file is part of mbed TLS (https://tls.mbed.org) + */ + +/* + * This program illustrates various ways of hashing a buffer. + * You normally need only one of these two includes. + */ +#include "mbedtls/sha256.h" /* SHA-256 only */ +#include "mbedtls/md.h" /* generic interface */ + +#if defined(TARGET_LIKE_MBED) +#include "mbed-drivers/mbed.h" +#endif +#include <cstdio> + +static void print_hex(const char *title, const unsigned char buf[], size_t len) +{ + printf("%s: ", title); + + for (size_t i = 0; i < len; i++) + printf("%02x", buf[i]); + + printf("\r\n"); +} + +static const char hello_str[] = "Hello, world!"; +static const unsigned char *hello_buffer = (const unsigned char *) hello_str; +static const size_t hello_len = sizeof hello_str - 1; + +int example(void) +{ + printf( "\r\n\r\n" ); + + /* + * Method 1: use all-in-one function of a specific SHA-xxx module + */ + unsigned char output1[32]; /* SHA-256 outputs 32 bytes */ + + /* 0 here means use the full SHA-256, not the SHA-224 variant */ + mbedtls_sha256(hello_buffer, hello_len, output1, 0); + + print_hex("Method 1", output1, sizeof output1); + + + /* + * Method 2: use the streaming interface of a specific SHA-xxx module + * This is useful if we get our input piecewise. + */ + unsigned char output2[32]; + mbedtls_sha256_context ctx2; + + mbedtls_sha256_init(&ctx2); + mbedtls_sha256_starts(&ctx2, 0); /* SHA-256, not 224 */ + + /* Simulating multiple fragments */ + mbedtls_sha256_update(&ctx2, hello_buffer, 1); + mbedtls_sha256_update(&ctx2, hello_buffer + 1, 1); + mbedtls_sha256_update(&ctx2, hello_buffer + 2, hello_len - 2); + + mbedtls_sha256_finish(&ctx2, output2); + print_hex("Method 2", output2, sizeof output2); + + /* Or you could re-use the context by doing mbedtls_sha256_starts() again */ + mbedtls_sha256_free(&ctx2); + + /* + * Method 3: use all-in-one function of the generice interface + */ + unsigned char output3[MBEDTLS_MD_MAX_SIZE]; /* Enough for any hash */ + + /* Can easily pick any hash you want, by identifier */ + const mbedtls_md_info_t *md_info3 = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256); + + if (md_info3 == NULL) + { + printf("SHA256 not available\r\n"); + return 1; + } + + int ret3 = mbedtls_md(md_info3, hello_buffer, hello_len, output3); + + if (ret3 != 0) + { + printf("md() returned -0x%04X\r\n", -ret3); + return 1; + } + + print_hex("Method 3", output3, mbedtls_md_get_size(md_info3)); + + + /* + * Method 4: streaming & generic interface + */ + unsigned char output4[MBEDTLS_MD_MAX_SIZE]; /* Enough for any hash */ + + const mbedtls_md_info_t *md_info4 = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256); + + if (md_info4 == NULL) + { + printf("SHA256 not available\r\n"); + return 1; + } + + mbedtls_md_context_t ctx4; + + mbedtls_md_init(&ctx4); + + int ret4 = mbedtls_md_init_ctx(&ctx4, md_info4); + if (ret4 != 0) + { + printf("md_init_ctx() returned -0x%04X\r\n", -ret4); + return 1; + } + + mbedtls_md_starts(&ctx4); + + /* Simulating multiple fragments */ + mbedtls_md_update(&ctx4, hello_buffer, 1); + mbedtls_md_update(&ctx4, hello_buffer + 1, 1); + mbedtls_md_update(&ctx4, hello_buffer + 2, hello_len - 2); + + mbedtls_md_finish(&ctx4, output4); + print_hex("Method 4", output4, mbedtls_md_get_size(md_info4)); + + /* Or you could re-use the context by doing mbedtls_md_starts() again */ + mbedtls_md_free(&ctx4); + + + printf("\r\nDONE\r\n"); + + return 0; +} + +#if defined(TARGET_LIKE_MBED) + +#include "mbed-drivers/test_env.h" +#include "minar/minar.h" + +static void run() { + MBED_HOSTTEST_TIMEOUT(10); + MBED_HOSTTEST_SELECT(default); + MBED_HOSTTEST_DESCRIPTION(mbed TLS example on hashing); + MBED_HOSTTEST_START("MBEDTLS_EX_HASHING"); + MBED_HOSTTEST_RESULT(example() == 0); +} + +void app_start(int, char*[]) { + /* Use 115200 bps for consistency with other examples */ + get_stdio_serial().baud(115200); + minar::Scheduler::postCallback(mbed::util::FunctionPointer0<void>(run).bind()); +} + +#else + +int main() { + return example(); +} + +#endif |