1 files changed, 97 insertions, 0 deletions
diff --git a/src/pdkim/signing.h b/src/pdkim/signing.h
new file mode 100644
index 0000000..ed6f397
--- /dev/null
+++ b/src/pdkim/signing.h
@@ -0,0 +1,97 @@
+/*
+ *  PDKIM - a RFC4871 (DKIM) implementation
+ *
+ *  Copyright (C) 1995 - 2020  Exim maintainers
+ *
+ *  RSA signing/verification interface
+ */
+
+#include "../exim.h"
+
+#ifndef DISABLE_DKIM	/* entire file */
+
+#include "crypt_ver.h"
+
+#ifdef SIGN_OPENSSL
+# include <openssl/rsa.h>
+# include <openssl/ssl.h>
+# include <openssl/err.h>
+#elif defined(SIGN_GNUTLS)
+# include <gnutls/gnutls.h>
+# include <gnutls/x509.h>
+# include <gnutls/abstract.h>
+#elif defined(SIGN_GCRYPT)
+# include <gcrypt.h>
+# include <libtasn1.h>
+#endif
+
+#include "../blob.h"
+
+typedef enum {
+  KEYTYPE_RSA,
+  KEYTYPE_ED25519
+} keytype;
+
+typedef enum {
+  KEYFMT_DER,		/* an asn.1 structure */
+  KEYFMT_ED25519_BARE	/* just the key */
+} keyformat;
+
+
+#ifdef SIGN_OPENSSL
+
+typedef struct {
+  keytype	keytype;
+  EVP_PKEY *	key;
+} es_ctx;
+
+typedef struct {
+  keytype	keytype;
+  EVP_PKEY *	key;
+} ev_ctx;
+
+#elif defined(SIGN_GNUTLS)
+
+typedef struct {
+  keytype	keytype;
+  gnutls_privkey_t key;
+} es_ctx;
+
+typedef struct {
+  keytype	keytype;
+  gnutls_pubkey_t key;
+} ev_ctx;
+
+#elif defined(SIGN_GCRYPT)
+
+typedef struct {
+  keytype	keytype;
+  gcry_mpi_t n;
+  gcry_mpi_t e;
+  gcry_mpi_t d;
+  gcry_mpi_t p;
+  gcry_mpi_t q;
+  gcry_mpi_t dp;
+  gcry_mpi_t dq;
+  gcry_mpi_t qp;
+} es_ctx;
+
+typedef struct {
+  keytype	keytype;
+  gcry_mpi_t n;
+  gcry_mpi_t e;
+} ev_ctx;
+
+#endif
+
+
+extern void exim_dkim_init(void);
+extern gstring * exim_dkim_data_append(gstring *, uschar *);
+
+extern const uschar * exim_dkim_signing_init(const uschar *, es_ctx *);
+extern const uschar * exim_dkim_sign(es_ctx *, hashmethod, blob *, blob *);
+extern const uschar * exim_dkim_verify_init(blob *, keyformat, ev_ctx *, unsigned *);
+extern const uschar * exim_dkim_verify(ev_ctx *, hashmethod, blob *, blob *);
+
+#endif	/*DISABLE_DKIM*/
+/* End of File */