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Signed-off-by: Artur Troian <[email protected]>
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| // The MIT License (MIT) | ||
| // | ||
| // Copyright (c) 2016-2020 Artur Troian | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in all | ||
| // copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| // SOFTWARE. | ||
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| #include <openssl/err.h> | ||
| #include <openssl/evp.h> | ||
| #include <openssl/crypto.h> | ||
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| #include <jwtpp/jwtpp.hh> | ||
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| namespace jwtpp { | ||
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| eddsa::eddsa(sp_evp_key key, alg_t a) | ||
| : crypto(a) | ||
| , _e(key) | ||
| { | ||
| if (a != alg_t::EdDSA) { | ||
| throw std::invalid_argument("Invalid algorithm"); | ||
| } | ||
| } | ||
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| std::string eddsa::sign(const std::string &data) { | ||
| auto md = sp_evp_md_ctx(EVP_MD_CTX_new(), ::EVP_MD_CTX_free); | ||
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| EVP_MD_CTX_init(md.get()); | ||
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| if (EVP_DigestSignInit(md.get(), nullptr, nullptr, nullptr, _e.get()) != 1) { | ||
| throw std::runtime_error("eddsa: digest sign init"); | ||
| } | ||
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| size_t sig_len = EVP_PKEY_size(_e.get()); | ||
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| auto sig = std::shared_ptr<uint8_t>(new uint8_t[sig_len], std::default_delete<uint8_t[]>()); | ||
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| if (EVP_DigestSign(md.get(), sig.get(), &sig_len, (const uint8_t *)data.data(), data.size()) != 1) { | ||
| throw std::runtime_error("eddsa: digest sign"); | ||
| } | ||
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| return b64::encode_uri(sig.get(), sig_len); | ||
| } | ||
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| bool eddsa::verify(const std::string &data, const std::string &sig) { | ||
| auto s = b64::decode_uri(sig.data(), sig.length()); | ||
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| auto md = sp_evp_md_ctx(EVP_MD_CTX_new(), ::EVP_MD_CTX_free); | ||
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| EVP_MD_CTX_init(md.get()); | ||
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| if (EVP_DigestVerifyInit(md.get(), nullptr, nullptr, nullptr, _e.get()) != 1) { | ||
| throw std::runtime_error("eddsa: digest verify init"); | ||
| } | ||
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| return EVP_DigestVerify(md.get(), s.data(), s.size(), (const uint8_t *)data.data(), data.size()) == 1; | ||
| } | ||
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| sp_evp_key eddsa::gen() { | ||
| auto ctx = sp_evp_pkey_ctx(EVP_PKEY_CTX_new_id(EVP_PKEY_ED25519, nullptr), ::EVP_PKEY_CTX_free); | ||
| if (EVP_PKEY_keygen_init(ctx.get()) != 1) { | ||
| throw std::runtime_error("eddsa: couldn't init evp keygen"); | ||
| } | ||
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| EVP_PKEY *key = nullptr; | ||
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| if (EVP_PKEY_keygen(ctx.get(), &key) != 1) { | ||
| throw std::runtime_error("eddsa: couldn't generate ED25519 key"); | ||
| } | ||
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| return sp_evp_key(key, ::EVP_PKEY_free); | ||
| } | ||
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| sp_evp_key eddsa::get_pub(sp_evp_key priv) { | ||
| size_t key_len; | ||
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| if (EVP_PKEY_get_raw_public_key(priv.get(), nullptr, &key_len) != 1) { | ||
| throw std::runtime_error("eddsa: couldn't read size of public key"); | ||
| } | ||
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| auto k = std::shared_ptr<uint8_t>(new uint8_t[key_len], std::default_delete<uint8_t[]>()); | ||
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| if (EVP_PKEY_get_raw_public_key(priv.get(), k.get(), &key_len) != 1) { | ||
| throw std::runtime_error("eddsa: couldn't extract public key"); | ||
| } | ||
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| return sp_evp_key(EVP_PKEY_new_raw_public_key(EVP_PKEY_ED25519, nullptr, k.get(), key_len), ::EVP_PKEY_free); | ||
| } | ||
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| } // namespace jwtpp |
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