Merge the openssl code together.

Having the code diffused all over the place was ugly and would
not scale well to multiple alternative providers.

GH #368

1 files changed, 117 insertions, 0 deletions

diff --git a/src/lib/prov/openssl/openssl_hash.cpp b/src/lib/prov/openssl/openssl_hash.cpp
new file mode 100644
index 000000000..c89dd777d
--- /dev/null
+++ b/src/lib/prov/openssl/openssl_hash.cpp
@@ -0,0 +1,117 @@
+/*
+* OpenSSL Hash Functions
+* (C) 1999-2007,2015 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/hash.h>
+#include <botan/internal/openssl.h>
+#include <botan/internal/algo_registry.h>
+#include <openssl/evp.h>
+
+namespace Botan {
+
+namespace {
+
+class OpenSSL_HashFunction : public HashFunction
+   {
+   public:
+      void clear()
+         {
+         const EVP_MD* algo = EVP_MD_CTX_md(&m_md);
+         EVP_DigestInit_ex(&m_md, algo, nullptr);
+         }
+
+      std::string name() const { return m_name; }
+
+      HashFunction* clone() const
+         {
+         const EVP_MD* algo = EVP_MD_CTX_md(&m_md);
+         return new OpenSSL_HashFunction(algo, name());
+         }
+
+      size_t output_length() const
+         {
+         return EVP_MD_size(EVP_MD_CTX_md(&m_md));
+         }
+
+      size_t hash_block_size() const
+         {
+         return EVP_MD_block_size(EVP_MD_CTX_md(&m_md));
+         }
+
+      OpenSSL_HashFunction(const EVP_MD* md, const std::string& name) : m_name(name)
+         {
+         EVP_MD_CTX_init(&m_md);
+         EVP_DigestInit_ex(&m_md, md, nullptr);
+         }
+
+      ~OpenSSL_HashFunction()
+         {
+         EVP_MD_CTX_cleanup(&m_md);
+         }
+
+   private:
+      void add_data(const byte input[], size_t length)
+         {
+         EVP_DigestUpdate(&m_md, input, length);
+         }
+
+      void final_result(byte output[])
+         {
+         EVP_DigestFinal_ex(&m_md, output, nullptr);
+         const EVP_MD* algo = EVP_MD_CTX_md(&m_md);
+         EVP_DigestInit_ex(&m_md, algo, nullptr);
+         }
+
+      std::string m_name;
+      EVP_MD_CTX m_md;
+   };
+
+std::function<HashFunction* (const HashFunction::Spec&)>
+make_evp_hash_maker(const EVP_MD* md, const char* algo)
+   {
+   return [md,algo](const HashFunction::Spec&)
+      {
+      return new OpenSSL_HashFunction(md, algo);
+      };
+   }
+
+#define BOTAN_REGISTER_OPENSSL_EVP_HASH(NAME, EVP)                      \
+   BOTAN_REGISTER_TYPE(HashFunction, OpenSSL_HashFunction ## EVP, NAME, \
+                       make_evp_hash_maker(EVP(), NAME), "openssl", BOTAN_OPENSSL_HASH_PRIO);
+
+#if !defined(OPENSSL_NO_SHA)
+   BOTAN_REGISTER_OPENSSL_EVP_HASH("SHA-160", EVP_sha1);
+#endif
+
+#if !defined(OPENSSL_NO_SHA256)
+   BOTAN_REGISTER_OPENSSL_EVP_HASH("SHA-224", EVP_sha224);
+   BOTAN_REGISTER_OPENSSL_EVP_HASH("SHA-256", EVP_sha256);
+#endif
+
+#if !defined(OPENSSL_NO_SHA512)
+   BOTAN_REGISTER_OPENSSL_EVP_HASH("SHA-384", EVP_sha384);
+   BOTAN_REGISTER_OPENSSL_EVP_HASH("SHA-512", EVP_sha512);
+#endif
+
+#if !defined(OPENSSL_NO_MD2)
+   BOTAN_REGISTER_OPENSSL_EVP_HASH("MD2", EVP_md2);
+#endif
+
+#if !defined(OPENSSL_NO_MD4)
+   BOTAN_REGISTER_OPENSSL_EVP_HASH("MD4", EVP_md4);
+#endif
+
+#if !defined(OPENSSL_NO_MD5)
+   BOTAN_REGISTER_OPENSSL_EVP_HASH("MD5", EVP_md5);
+#endif
+
+#if !defined(OPENSSL_NO_RIPEMD)
+   BOTAN_REGISTER_OPENSSL_EVP_HASH("RIPEMD-160", EVP_ripemd160);
+#endif
+
+}
+
+}