Add support for hashing with CommonCrypto

3 files changed, 184 insertions, 0 deletions

diff --git a/src/lib/prov/commoncrypto/commoncrypto.h b/src/lib/prov/commoncrypto/commoncrypto.h
new file mode 100644
index 000000000..da4adc8bf
--- /dev/null
+++ b/src/lib/prov/commoncrypto/commoncrypto.h
@@ -0,0 +1,36 @@
+/*
+* Utils for calling CommonCrypto
+* (C) 2018 Jose Pereira
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_INTERNAL_COMMONCRYPTO_H_
+#define BOTAN_INTERNAL_COMMONCRYPTO_H_
+
+#include <botan/pk_ops_fwd.h>
+#include <botan/secmem.h>
+#include <botan/exceptn.h>
+#include <memory>
+#include <string>
+
+#include <CommonCrypto/CommonCrypto.h>
+
+namespace Botan {
+
+class HashFunction;
+
+class BOTAN_PUBLIC_API(2,0) CommonCrypto_Error final : public Exception
+  {
+    public:
+      CommonCrypto_Error(const std::string& what) :
+        Exception(what + " failed.") {}
+  };
+
+/* Hash */
+
+std::unique_ptr<HashFunction> make_commoncrypto_hash(const std::string& name);
+
+}
+
+#endif
diff --git a/src/lib/prov/commoncrypto/commoncrypto_hash.cpp b/src/lib/prov/commoncrypto/commoncrypto_hash.cpp
new file mode 100644
index 000000000..81afa0e01
--- /dev/null
+++ b/src/lib/prov/commoncrypto/commoncrypto_hash.cpp
@@ -0,0 +1,139 @@
+/*
+* CommonCrypto Hash Functions
+* (C) 2018 Jose Pereira
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/hash.h>
+#include <botan/internal/commoncrypto.h>
+
+#include <unordered_map>
+
+namespace Botan {
+
+namespace {
+
+template <class CTX>
+class CommonCrypto_HashFunction final : public HashFunction
+   {
+   public:
+
+    struct digest_config_t {
+      std::string name;
+      size_t digestLength;
+      size_t blockSize;
+      int (*init)(CTX *);
+      int (*update)(CTX *, const void *, CC_LONG len);
+      int (*final)(unsigned char *, CTX*);
+    };
+
+    void clear() override
+      {
+        if(m_info.init(&m_ctx) != 1)
+          throw CommonCrypto_Error("CC_" + m_info.name + "_Init");
+      }
+
+    std::string provider() const override { return "commoncrypto"; }
+    std::string name() const override { return m_info.name; }
+
+    HashFunction* clone() const override
+      {
+      return new CommonCrypto_HashFunction(m_info);
+      }
+
+    std::unique_ptr<HashFunction> copy_state() const override
+      {
+      return std::unique_ptr<CommonCrypto_HashFunction>(
+        new CommonCrypto_HashFunction(m_info, m_ctx));
+      }
+
+    size_t output_length() const override
+      {
+      return m_info.digestLength;
+      }
+
+    size_t hash_block_size() const override
+      {
+        return m_info.blockSize;
+      }
+
+    CommonCrypto_HashFunction(const digest_config_t& info) :
+      m_info(info)
+        {
+          clear();
+        }
+
+    CommonCrypto_HashFunction(const digest_config_t& info, const CTX &ctx) :
+      m_ctx(ctx), m_info(info) {}
+
+   private:
+      void add_data(const uint8_t input[], size_t length) override
+        {
+          if(m_info.update(&m_ctx, input, length) != 1)
+            throw CommonCrypto_Error("CC_" + m_info.name + "_Update");
+        }
+
+      void final_result(uint8_t output[]) override
+        {
+          if(m_info.final(output, &m_ctx) != 1)
+            throw CommonCrypto_Error("CC_" + m_info.name + "_Final");
+          clear();
+        }
+
+      CTX m_ctx;
+      digest_config_t m_info;
+   };
+}
+
+std::unique_ptr<HashFunction>
+make_commoncrypto_hash(const std::string& name)
+   {
+#define MAKE_COMMONCRYPTO_HASH_3(name, hash, ctx)     \
+      std::unique_ptr<HashFunction>( \
+        new CommonCrypto_HashFunction<CC_ ## ctx ## _CTX >({ \
+          name, \
+          CC_ ## hash ## _DIGEST_LENGTH, \
+          CC_ ## hash ## _BLOCK_BYTES, \
+          CC_ ## hash ## _Init, \
+          CC_ ## hash ## _Update, \
+          CC_ ## hash ## _Final \
+        }));
+
+#define MAKE_COMMONCRYPTO_HASH_2(name, id) \
+  MAKE_COMMONCRYPTO_HASH_3(name, id, id)
+
+#define MAKE_COMMONCRYPTO_HASH_1(id) \
+  MAKE_COMMONCRYPTO_HASH_2(#id, id)
+
+#if defined(BOTAN_HAS_SHA2_32)
+   if(name == "SHA-224")
+      return MAKE_COMMONCRYPTO_HASH_3(name, SHA224, SHA256);
+   if(name == "SHA-256")
+     return MAKE_COMMONCRYPTO_HASH_2(name, SHA256);
+#endif
+#if defined(BOTAN_HAS_SHA2_64)
+   if(name == "SHA-384")
+      return MAKE_COMMONCRYPTO_HASH_3(name, SHA384, SHA512);
+   if(name == "SHA-512")
+      return MAKE_COMMONCRYPTO_HASH_2(name, SHA512);
+#endif
+
+#if defined(BOTAN_HAS_SHA1)
+   if(name == "SHA-160" || name == "SHA-1" || name == "SHA1")
+      return MAKE_COMMONCRYPTO_HASH_2(name, SHA1);
+#endif
+
+#if defined(BOTAN_HAS_MD5)
+   if(name == "MD5")
+      return MAKE_COMMONCRYPTO_HASH_1(MD5);
+   #endif
+
+#if defined(BOTAN_HAS_MD4)
+   if(name == "MD4")
+      return MAKE_COMMONCRYPTO_HASH_1(MD4);
+#endif
+   return nullptr;
+   }
+
+}
diff --git a/src/lib/prov/commoncrypto/info.txt b/src/lib/prov/commoncrypto/info.txt
new file mode 100644
index 000000000..00dfb27ae
--- /dev/null
+++ b/src/lib/prov/commoncrypto/info.txt
@@ -0,0 +1,9 @@
+<defines>
+COMMONCRYPTO -> 20180903
+</defines>
+
+load_on vendor
+
+<header:internal>
+commoncrypto.h
+</header:internal>