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https://github.com/RGBCube/serenity
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1682f0b760
SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
/*
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* Copyright (c) 2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Base64.h>
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#include <AK/GenericLexer.h>
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#include <LibCrypto/ASN1/PEM.h>
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namespace Crypto {
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ByteBuffer decode_pem(ReadonlyBytes data)
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{
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GenericLexer lexer { data };
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ByteBuffer decoded;
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// FIXME: Parse multiple.
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enum {
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PreStartData,
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Started,
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Ended,
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} state { PreStartData };
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while (!lexer.is_eof()) {
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switch (state) {
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case PreStartData:
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if (lexer.consume_specific("-----BEGIN"))
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state = Started;
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lexer.consume_line();
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break;
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case Started: {
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if (lexer.consume_specific("-----END")) {
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state = Ended;
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lexer.consume_line();
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break;
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}
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auto b64decoded = decode_base64(lexer.consume_line().trim_whitespace(TrimMode::Right));
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decoded.append(b64decoded.data(), b64decoded.size());
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break;
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}
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case Ended:
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lexer.consume_all();
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break;
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default:
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VERIFY_NOT_REACHED();
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}
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}
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return decoded;
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}
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}
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