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68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
#ifndef TGCALLS_CRYPTO_HELPER_H
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#define TGCALLS_CRYPTO_HELPER_H
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extern "C" {
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#include <openssl/sha.h>
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#include <openssl/aes.h>
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#ifndef OPENSSL_IS_BORINGSSL
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#include <openssl/modes.h>
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#endif
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#include <openssl/rand.h>
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#include <openssl/crypto.h>
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} // extern "C"
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#include <array>
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namespace tgcalls {
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struct MemorySpan {
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MemorySpan(const void *data, size_t size) :
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data(data),
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size(size) {
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}
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const void *data = nullptr;
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size_t size = 0;
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};
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struct AesKeyIv {
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std::array<uint8_t, 32> key;
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std::array<uint8_t, 16> iv;
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};
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constexpr auto kSha256Size = size_t(SHA256_DIGEST_LENGTH);
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template <typename ...Parts>
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void SHA256Update(SHA256_CTX*, Parts &&...parts);
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inline void SHA256Update(SHA256_CTX*) {
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}
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template <typename First, typename ...Others>
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inline void SHA256Update(SHA256_CTX *context, First &&span, Others &&...others) {
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static_assert(
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std::is_same<std::decay_t<First>, MemorySpan>::value,
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"Pass some MemorySpan-s here.");
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SHA256_Update(context, span.data, span.size);
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SHA256Update(context, std::forward<Others>(others)...);
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}
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template <typename ...Parts>
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inline std::array<uint8_t, kSha256Size> ConcatSHA256(Parts &&... parts) {
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static_assert(sizeof...(parts) > 0, "empty list");
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auto result = std::array<uint8_t, kSha256Size>();
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auto context = SHA256_CTX();
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SHA256_Init(&context);
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SHA256Update(&context, std::forward<Parts>(parts)...);
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SHA256_Final(result.data(), &context);
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return result;
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}
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AesKeyIv PrepareAesKeyIv(const uint8_t *key, const uint8_t *msgKey, int x);
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void AesProcessCtr(MemorySpan from, void *to, AesKeyIv &&aesKeyIv);
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} // namespace tgcalls
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#endif
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