diff options
Diffstat (limited to 'comm/third_party/botan/src/lib/pk_pad/mgf1/mgf1.cpp')
-rw-r--r-- | comm/third_party/botan/src/lib/pk_pad/mgf1/mgf1.cpp | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/pk_pad/mgf1/mgf1.cpp b/comm/third_party/botan/src/lib/pk_pad/mgf1/mgf1.cpp new file mode 100644 index 0000000000..2e7ef99734 --- /dev/null +++ b/comm/third_party/botan/src/lib/pk_pad/mgf1/mgf1.cpp @@ -0,0 +1,36 @@ +/* +* MGF1 +* (C) 1999-2007 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#include <botan/mgf1.h> +#include <botan/hash.h> +#include <algorithm> + +namespace Botan { + +void mgf1_mask(HashFunction& hash, + const uint8_t in[], size_t in_len, + uint8_t out[], size_t out_len) + { + uint32_t counter = 0; + + secure_vector<uint8_t> buffer(hash.output_length()); + while(out_len) + { + hash.update(in, in_len); + hash.update_be(counter); + hash.final(buffer.data()); + + const size_t xored = std::min<size_t>(buffer.size(), out_len); + xor_buf(out, buffer.data(), xored); + out += xored; + out_len -= xored; + + ++counter; + } + } + +} |