Merge pull request 'Start optionally using the SHA implementation from the existing crypto API' (#44) from lda/Cytoplasm:opt-ssl-for-sha into master

Reviewed-on: Telodendria/Cytoplasm#44

src/Sha/Sha1.c

@@ -28,6 +28,27 @@
 
 #include <limits.h>
 
+/* TODO: Verify LibreSSL support later */
+#if TLS_IMPL == TLS_OPENSSL
+
+#include <openssl/sha.h>
+    
+unsigned char *
+Sha1(char *str)
+{
+    unsigned char *digest;
+    if (!str)
+    {
+        return NULL;
+    }
+
+    digest = Malloc(20 + 1);
+    SHA1((unsigned char *) str, strlen(str), digest);
+    digest[20] = '\0';
+    return digest;
+}
+#else
+
 #define LOAD32H(x, y) \
 	{ \
 		x = ((uint32_t)((y)[0] & 255) << 24) | \
@@ -264,3 +285,4 @@ Sha1(char *str)
 
     return out;
 }
+#endif

src/Sha/Sha256.c

@@ -21,14 +21,36 @@
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#include <Sha.h>
 #include <Memory.h>
+#include <Sha.h>
 
 #include <stdio.h>
 #include <string.h>
 
 #include <limits.h>
 
+
+/* TODO: Verify LibreSSL support later */
+#if TLS_IMPL == TLS_OPENSSL
+
+#include <openssl/sha.h>
+
+unsigned char *
+Sha256(char *str)
+{
+    unsigned char *digest;
+    if (!str)
+    {
+        return NULL;
+    }
+
+    digest = Malloc(32 + 1);
+    SHA256((unsigned char *) str, strlen(str), digest);
+    digest[32] = '\0';
+    return digest;
+}
+#else
+
 #define GET_UINT32(x) \
     (((uint32_t)(x)[0] << 24) | \
      ((uint32_t)(x)[1] << 16) | \
@@ -230,3 +252,4 @@ Sha256(char *str)
 
     return out;
 }
+#endif