DKIM: document proper Ed25519 key-generation methods; remove helper program

[users/jgh/exim.git] / src / util / src / ed25519_privkey_pem_to_pubkey_raw_b64.c

diff --git a/src/util/src/ed25519_privkey_pem_to_pubkey_raw_b64.c b/src/util/src/ed25519_privkey_pem_to_pubkey_raw_b64.c
deleted file mode 100644 (file)
index f6639b7..0000000
--- a/src/util/src/ed25519_privkey_pem_to_pubkey_raw_b64.c
+++ /dev/null
@@ -1,139 +0,0 @@
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-
-#include <stdarg.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-/* Unix includes */
-
-typedef unsigned char uschar;
-
-#define CS   (char *)
-#define US   (unsigned char *)
-
-#define FALSE         0
-#define TRUE          1
-
-
-
-#ifdef HAVE_GNUTLS
-
-
-#include <gnutls/gnutls.h>
-#include <gnutls/abstract.h>
-#include <gnutls/x509.h>
-
-#if GNUTLS_VERSION_NUMBER >= 0x030600
-# define SIGN_HAVE_ED25519
-#endif
-
-
-
-static uschar *enc64table =
-  US"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-uschar *
-b64encode(uschar *clear, int len)
-{
-uschar *code = malloc(4*((len+2)/3) + 2);
-uschar *p = code;
-
-while (len-- >0)
-  {
-  int x, y;
-
-  x = *clear++;
-  *p++ = enc64table[(x >> 2) & 63];
-
-  if (len-- <= 0)
-    {
-    *p++ = enc64table[(x << 4) & 63];
-    *p++ = '=';
-    *p++ = '=';
-    break;
-    }
-
-  y = *clear++;
-  *p++ = enc64table[((x << 4) | ((y >> 4) & 15)) & 63];
-
-  if (len-- <= 0)
-    {
-    *p++ = enc64table[(y << 2) & 63];
-    *p++ = '=';
-    break;
-    }
-
-  x = *clear++;
-  *p++ = enc64table[((y << 2) | ((x >> 6) & 3)) & 63];
-
-  *p++ = enc64table[x & 63];
-  }
-
-*p = 0;
-
-return code;
-}
-
-/*************************************************
-*                 Main Program                   *
-*************************************************/
-
-
-int
-main(int argc, char **argv)
-{
-uschar * pemfile = argv[1];
-int fd;
-uschar buf[1024];
-int len, rc;
-gnutls_privkey_t privkey;
-gnutls_datum_t k;
-gnutls_pubkey_t pubkey;
-uschar * b64;
-
-#ifdef SIGN_HAVE_ED25519
-if ((fd = open(CS pemfile, O_RDONLY)) < 0)
-  exit(1);
-
-if ((len = read(fd, buf, sizeof(buf)-1)) < 0)
-  exit(2);
-
-k.data = buf;
-k.size = len;
-
-if (  (rc = gnutls_privkey_init(&privkey))
-   || (rc = gnutls_privkey_import_x509_raw(privkey, &k, GNUTLS_X509_FMT_PEM, NULL, GNUTLS_PKCS_PLAIN))
-   || (rc = gnutls_pubkey_init(&pubkey))
-   || (rc = gnutls_pubkey_import_privkey(pubkey, privkey, GNUTLS_KEY_DIGITAL_SIGNATURE, 0))
-   || (rc = gnutls_pubkey_export_ecc_raw2(pubkey, NULL, &k, NULL, GNUTLS_EXPORT_FLAG_NO_LZ))
-   )
-  fprintf(stderr, "%s\n", gnutls_strerror(rc));
-
-b64 = b64encode(k.data, k.size);
-
-printf("%s\n", b64);
-exit(0);
-
-#else
-fprintf(stderr, "No support for ed25519 signing in GnuTLS (version %s)\n", gnutls_check_version(NULL));
-exit(3);
-#endif
-}
-
-#endif
-
-#ifdef HAVE_OPENSSL
-int
-main(int argc, char **argv)
-{
-fprintf(stderr, "No support for ed25519 signing in OpenSSL\n");
-exit(3);
-}
-
-#endif