diff options
Diffstat (limited to 'src/lib/pubkey/xmss/xmss_hash.cpp')
| -rw-r--r-- | src/lib/pubkey/xmss/xmss_hash.cpp | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/src/lib/pubkey/xmss/xmss_hash.cpp b/src/lib/pubkey/xmss/xmss_hash.cpp index d6ae2bb3b..3731f7751 100644 --- a/src/lib/pubkey/xmss/xmss_hash.cpp +++ b/src/lib/pubkey/xmss/xmss_hash.cpp @@ -8,6 +8,7 @@ **/ #include <botan/xmss_hash.h> +#include <botan/exceptn.h> namespace Botan { @@ -16,14 +17,19 @@ XMSS_Hash::XMSS_Hash(const XMSS_Hash& hash) { } -XMSS_Hash::XMSS_Hash(const std::string& h_func_name) - : m_hash(HashFunction::create(h_func_name)), - m_msg_hash(HashFunction::create(h_func_name)), - m_output_length(m_hash->output_length()), - m_zero_padding(m_output_length - 1, 0x00), - m_hash_func_name(h_func_name) +XMSS_Hash::XMSS_Hash(const std::string& h_func_name) : + m_hash_func_name(h_func_name), + m_hash(HashFunction::create(h_func_name)) { + if(!m_hash) + throw Lookup_Error("XMSS cannot use hash " + h_func_name + + " because it is unavailable"); + + m_output_length = m_hash->output_length(); BOTAN_ASSERT(m_output_length > 0, "Hash output length of zero is invalid."); + + m_zero_padding.resize(m_output_length - 1); + m_msg_hash.reset(m_hash->clone()); } void |