Reroot the exception hierarchy into a toplevel Exception class

As the alternatives are unfortunate for applications trying to catch
all library errors, and it seems deriving from std::runtime_error
causes problems with MSVC DLLs (GH #340)

Effectively reverts 2837e915d82e43

1 files changed, 3 insertions, 3 deletions

diff --git a/src/lib/misc/srp6/srp6.cpp b/src/lib/misc/srp6/srp6.cpp
index f567db875..7fca6461f 100644
--- a/src/lib/misc/srp6/srp6.cpp
+++ b/src/lib/misc/srp6/srp6.cpp
@@ -70,7 +70,7 @@ std::string srp6_group_identifier(const BigInt& N, const BigInt& g)
       if(group.get_p() == N && group.get_g() == g)
          return group_name;
 
-      throw std::runtime_error("Unknown SRP params");
+      throw Exception("Unknown SRP params");
       }
    catch(...)
       {
@@ -94,7 +94,7 @@ srp6_client_agree(const std::string& identifier,
    const size_t p_bytes = group.get_p().bytes();
 
    if(B <= 0 || B >= p)
-      throw std::runtime_error("Invalid SRP parameter from server");
+      throw Exception("Invalid SRP parameter from server");
 
    BigInt k = hash_seq(hash_id, p_bytes, p, g);
 
@@ -150,7 +150,7 @@ BigInt SRP6_Server_Session::step1(const BigInt& v,
 SymmetricKey SRP6_Server_Session::step2(const BigInt& A)
    {
    if(A <= 0 || A >= m_p)
-      throw std::runtime_error("Invalid SRP parameter from client");
+      throw Exception("Invalid SRP parameter from client");
 
    const BigInt u = hash_seq(m_hash_id, m_p_bytes, A, m_B);