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660a499223
This helps make callers only use the slice of the output buffer that was written to. As part of updating the callers of the API several bugs were fixed and useless code paths were removed: - The exported data is not host-endianess dependent (always big endian) - The exported data does not contain leading zeros - The output buffer is only written up to the result's size
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
/*
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* Copyright (c) 2025, Altomani Gianluca <altomanigianluca@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/ByteBuffer.h>
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#include <LibCrypto/OpenSSL.h>
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#include <openssl/bn.h>
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#include <openssl/evp.h>
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namespace Crypto {
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ErrorOr<OpenSSL_BN> OpenSSL_BN::create()
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{
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return OpenSSL_BN(OPENSSL_TRY_PTR(BN_new()));
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}
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ErrorOr<OpenSSL_PKEY> OpenSSL_PKEY::create()
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{
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return OpenSSL_PKEY(OPENSSL_TRY_PTR(EVP_PKEY_new()));
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}
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ErrorOr<OpenSSL_MD_CTX> OpenSSL_MD_CTX::create()
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{
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return OpenSSL_MD_CTX(OPENSSL_TRY_PTR(EVP_MD_CTX_new()));
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}
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ErrorOr<OpenSSL_CIPHER_CTX> OpenSSL_CIPHER_CTX::create()
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{
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return OpenSSL_CIPHER_CTX(OPENSSL_TRY_PTR(EVP_CIPHER_CTX_new()));
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}
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ErrorOr<OpenSSL_BN> unsigned_big_integer_to_openssl_bignum(UnsignedBigInteger const& integer)
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{
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auto bn = TRY(OpenSSL_BN::create());
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auto buf = TRY(ByteBuffer::create_uninitialized(integer.byte_length()));
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auto result = integer.export_data(buf.bytes());
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OPENSSL_TRY_PTR(BN_bin2bn(result.data(), result.size(), bn.ptr()));
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return bn;
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}
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ErrorOr<UnsignedBigInteger> openssl_bignum_to_unsigned_big_integer(OpenSSL_BN const& bn)
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{
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auto size = BN_num_bytes(bn.ptr());
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auto buf = TRY(ByteBuffer::create_uninitialized(size));
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BN_bn2bin(bn.ptr(), buf.bytes().data());
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return UnsignedBigInteger::import_data(buf.bytes().data(), size);
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}
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ErrorOr<StringView> hash_kind_to_openssl_digest_name(Hash::HashKind hash)
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{
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switch (hash) {
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case Hash::HashKind::MD5:
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return "MD5"sv;
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case Hash::HashKind::SHA1:
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return "SHA1"sv;
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case Hash::HashKind::SHA256:
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return "SHA256"sv;
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case Hash::HashKind::SHA384:
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return "SHA384"sv;
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case Hash::HashKind::SHA512:
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return "SHA512"sv;
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default:
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return Error::from_string_literal("Unsupported hash kind");
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}
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}
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}
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