Coverage Report

Created: 2021-02-21 07:20

/src/botan/src/lib/pk_pad/mgf1/mgf1.cpp
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/*
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* MGF1
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* (C) 1999-2007 Jack Lloyd
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*
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* Botan is released under the Simplified BSD License (see license.txt)
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*/
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#include <botan/internal/mgf1.h>
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#include <botan/hash.h>
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#include <algorithm>
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namespace Botan {
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void mgf1_mask(HashFunction& hash,
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               const uint8_t in[], size_t in_len,
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               uint8_t out[], size_t out_len)
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   {
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   uint32_t counter = 0;
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   secure_vector<uint8_t> buffer(hash.output_length());
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   while(out_len)
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      {
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      hash.update(in, in_len);
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      hash.update_be(counter);
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      hash.final(buffer.data());
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      const size_t xored = std::min<size_t>(buffer.size(), out_len);
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      xor_buf(out, buffer.data(), xored);
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      out += xored;
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      out_len -= xored;
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      ++counter;
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      }
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   }
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}