mirror of
https://github.com/emsesp/EMS-ESP32.git
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sync with core3 features
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@@ -66,21 +66,16 @@ void ArduinoJsonJWT::parseJWT(String jwt, JsonDocument & jsonDocument) {
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}
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/*
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* ESP32 uses mbedtls, with decent HMAC implementations supporting sha256, as well as others.
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* No need to pull in additional crypto libraries - lets use what we already have.
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* HMAC-SHA256 using mbedtls
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*/
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String ArduinoJsonJWT::sign(String & payload) {
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std::array<unsigned char, 32> hmacResult{};
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{
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mbedtls_md_context_t ctx;
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mbedtls_md_type_t md_type = MBEDTLS_MD_SHA256;
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mbedtls_md_init(&ctx);
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mbedtls_md_setup(&ctx, mbedtls_md_info_from_type(md_type), 1);
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mbedtls_md_hmac_starts(&ctx, reinterpret_cast<const unsigned char *>(_secret.c_str()), _secret.length());
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mbedtls_md_hmac_update(&ctx, reinterpret_cast<const unsigned char *>(payload.c_str()), payload.length());
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mbedtls_md_hmac_finish(&ctx, hmacResult.data());
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mbedtls_md_free(&ctx);
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}
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mbedtls_md_hmac(mbedtls_md_info_from_type(MBEDTLS_MD_SHA256),
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reinterpret_cast<const unsigned char *>(_secret.c_str()),
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_secret.length(),
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reinterpret_cast<const unsigned char *>(payload.c_str()),
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payload.length(),
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hmacResult.data());
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return encode(reinterpret_cast<const char *>(hmacResult.data()), hmacResult.size());
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}
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