Initial openssl RSASHA1 implementation (only SHA1 for now).

src/dnssec-openssl.c

@@ -0,0 +1,45 @@
+#include <string.h>
+#include <openssl/evp.h>
+
+struct rsasha1_state
+{
+  union
+    {
+      EVP_MD_CTX hash;
+      unsigned char digest[20];
+    };
+  unsigned char *sig;
+  unsigned siglen;
+
+} RSASHA1;
+
+int rsasha1_set_signature(unsigned char *data, unsigned len)
+{
+  RSASHA1.sig = data;
+  RSASHA1.siglen = len;
+  return 1;
+}
+
+void rsasha1_begin_data(void)
+{
+  EVP_MD_CTX_init(&RSASHA1.hash);
+  EVP_DigestInit_ex(&RSASHA1.hash, EVP_sha1(), NULL);
+}
+
+void rsasha1_add_data(void *data, unsigned len)
+{
+  EVP_DigestUpdate(&RSASHA1.hash, data, len);
+}
+
+void rsasha1_end_data(void)
+{
+  unsigned char digest[20];
+  EVP_DigestFinal(&RSASHA1.hash, digest, NULL);
+  memcpy(RSASHA1.digest, digest, 20);
+}
+
+int rsasha1_verify(unsigned char *key, unsigned key_len)
+{
+  return 0;
+}
+