diff options
Diffstat (limited to 'comm/third_party/botan/src/lib/pbkdf/pbkdf1/pbkdf1.cpp')
-rw-r--r-- | comm/third_party/botan/src/lib/pbkdf/pbkdf1/pbkdf1.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/pbkdf/pbkdf1/pbkdf1.cpp b/comm/third_party/botan/src/lib/pbkdf/pbkdf1/pbkdf1.cpp new file mode 100644 index 0000000000..ad922ce9c6 --- /dev/null +++ b/comm/third_party/botan/src/lib/pbkdf/pbkdf1/pbkdf1.cpp @@ -0,0 +1,54 @@ +/* +* PBKDF1 +* (C) 1999-2007 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#include <botan/pbkdf1.h> +#include <botan/exceptn.h> + +namespace Botan { + +size_t PKCS5_PBKDF1::pbkdf(uint8_t output_buf[], size_t output_len, + const std::string& passphrase, + const uint8_t salt[], size_t salt_len, + size_t iterations, + std::chrono::milliseconds msec) const + { + if(output_len > m_hash->output_length()) + throw Invalid_Argument("PKCS5_PBKDF1: Requested output length too long"); + + m_hash->update(passphrase); + m_hash->update(salt, salt_len); + secure_vector<uint8_t> key = m_hash->final(); + + const auto start = std::chrono::high_resolution_clock::now(); + size_t iterations_performed = 1; + + while(true) + { + if(iterations == 0) + { + if(iterations_performed % 10000 == 0) + { + auto time_taken = std::chrono::high_resolution_clock::now() - start; + auto msec_taken = std::chrono::duration_cast<std::chrono::milliseconds>(time_taken); + if(msec_taken > msec) + break; + } + } + else if(iterations_performed == iterations) + break; + + m_hash->update(key); + m_hash->final(key.data()); + + ++iterations_performed; + } + + copy_mem(output_buf, key.data(), output_len); + return iterations_performed; + } + +} |