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diff -up rpm-4.14.3/sign/rpmgensig.c.orig rpm-4.14.3/sign/rpmgensig.c
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--- rpm-4.14.3/sign/rpmgensig.c.orig	2020-06-26 15:57:43.781333983 +0200
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+++ rpm-4.14.3/sign/rpmgensig.c	2020-06-26 15:58:29.819229616 +0200
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@@ -8,7 +8,6 @@
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 #include <errno.h>
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 #include <sys/wait.h>
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 #include <popt.h>
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-#include <libgen.h>
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 #include <rpm/rpmlib.h>			/* RPMSIGTAG & related */
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 #include <rpm/rpmmacro.h>
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@@ -33,68 +32,6 @@ typedef struct sigTarget_s {
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     rpm_loff_t size;
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 } *sigTarget;
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-/*
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- * There is no function for creating unique temporary fifos so create
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- * unique temporary directory and then create fifo in it.
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- */
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-static char *mkTempFifo(void)
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-{
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-    char *tmppath = NULL, *tmpdir = NULL, *fifofn = NULL;
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-    mode_t mode;
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-
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-    tmppath = rpmExpand("%{_tmppath}", NULL);
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-    if (rpmioMkpath(tmppath, 0755, (uid_t) -1, (gid_t) -1))
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-	goto exit;
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-
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-
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-    tmpdir = rpmGetPath(tmppath, "/rpm-tmp.XXXXXX", NULL);
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-    mode = umask(0077);
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-    tmpdir = mkdtemp(tmpdir);
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-    umask(mode);
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-    if (tmpdir == NULL) {
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-	rpmlog(RPMLOG_ERR, _("error creating temp directory %s: %m\n"),
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-	    tmpdir);
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-	tmpdir = _free(tmpdir);
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-	goto exit;
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-    }
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-
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-    fifofn = rpmGetPath(tmpdir, "/fifo", NULL);
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-    if (mkfifo(fifofn, 0600) == -1) {
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-	rpmlog(RPMLOG_ERR, _("error creating fifo %s: %m\n"), fifofn);
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-	fifofn = _free(fifofn);
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-    }
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-
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-exit:
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-    if (fifofn == NULL && tmpdir != NULL)
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-	unlink(tmpdir);
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-
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-    free(tmppath);
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-    free(tmpdir);
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-
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-    return fifofn;
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-}
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-
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-/* Delete fifo and then temporary directory in which it was located */
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-static int rpmRmTempFifo(const char *fn)
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-{
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-    int rc = 0;
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-    char *dfn = NULL, *dir = NULL;
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-
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-    if ((rc = unlink(fn)) != 0) {
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-	rpmlog(RPMLOG_ERR, _("error delete fifo %s: %m\n"), fn);
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-	return rc;
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-    }
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-
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-    dfn = xstrdup(fn);
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-    dir = dirname(dfn);
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-
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-    if ((rc = rmdir(dir)) != 0)
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-	rpmlog(RPMLOG_ERR, _("error delete directory %s: %m\n"), dir);
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-    free(dfn);
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-
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-    return rc;
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-}
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-
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 static int closeFile(FD_t *fdp)
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 {
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     if (fdp == NULL || *fdp == NULL)
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@@ -241,27 +178,38 @@ exit:
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 static int runGPG(sigTarget sigt, const char *sigfile)
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 {
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     int pid = 0, status;
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-    FD_t fnamedPipe = NULL;
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-    char *namedPipeName = NULL;
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+    int pipefd[2];
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+    FILE *fpipe = NULL;
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     unsigned char buf[BUFSIZ];
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     ssize_t count;
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     ssize_t wantCount;
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     rpm_loff_t size;
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     int rc = 1; /* assume failure */
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-    namedPipeName = mkTempFifo();
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+    if (pipe(pipefd) < 0) {
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+        rpmlog(RPMLOG_ERR, _("Could not create pipe for signing: %m\n"));
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+        goto exit;
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+    }
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-    rpmPushMacro(NULL, "__plaintext_filename", NULL, namedPipeName, -1);
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+    rpmPushMacro(NULL, "__plaintext_filename", NULL, "-", -1);
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     rpmPushMacro(NULL, "__signature_filename", NULL, sigfile, -1);
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     if (!(pid = fork())) {
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 	char *const *av;
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 	char *cmd = NULL;
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-	const char *gpg_path = rpmExpand("%{?_gpg_path}", NULL);
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+	const char *tty = ttyname(STDIN_FILENO);
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+	const char *gpg_path = NULL;
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+
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+	if (!getenv("GPG_TTY") && (!tty || setenv("GPG_TTY", tty, 0)))
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+	    rpmlog(RPMLOG_WARNING, _("Could not set GPG_TTY to stdin: %m\n"));
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+	gpg_path = rpmExpand("%{?_gpg_path}", NULL);
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 	if (gpg_path && *gpg_path != '\0')
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 	    (void) setenv("GNUPGHOME", gpg_path, 1);
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+	dup2(pipefd[0], STDIN_FILENO);
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+	close(pipefd[1]);
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+
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 	unsetenv("MALLOC_CHECK_");
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 	cmd = rpmExpand("%{?__gpg_sign_cmd}", NULL);
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 	rc = poptParseArgvString(cmd, NULL, (const char ***)&av;;
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@@ -276,9 +224,10 @@ static int runGPG(sigTarget sigt, const
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     rpmPopMacro(NULL, "__plaintext_filename");
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     rpmPopMacro(NULL, "__signature_filename");
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-    fnamedPipe = Fopen(namedPipeName, "w");
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-    if (!fnamedPipe) {
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-	rpmlog(RPMLOG_ERR, _("Fopen failed\n"));
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+    close(pipefd[0]);
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+    fpipe = fdopen(pipefd[1], "w");
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+    if (!fpipe) {
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+	rpmlog(RPMLOG_ERR, _("Could not open pipe for writing: %m\n"));
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 	goto exit;
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     }
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@@ -291,8 +240,8 @@ static int runGPG(sigTarget sigt, const
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     size = sigt->size;
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     wantCount = size < sizeof(buf) ? size : sizeof(buf);
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     while ((count = Fread(buf, sizeof(buf[0]), wantCount, sigt->fd)) > 0) {
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-	Fwrite(buf, sizeof(buf[0]), count, fnamedPipe);
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-	if (Ferror(fnamedPipe)) {
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+	fwrite(buf, sizeof(buf[0]), count, fpipe);
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+	if (ferror(fpipe)) {
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 	    rpmlog(RPMLOG_ERR, _("Could not write to pipe\n"));
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 	    goto exit;
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 	}
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@@ -304,8 +253,13 @@ static int runGPG(sigTarget sigt, const
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 		sigt->fileName, Fstrerror(sigt->fd));
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 	goto exit;
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     }
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-    Fclose(fnamedPipe);
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-    fnamedPipe = NULL;
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+
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+exit:
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+
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+    if (fpipe)
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+	fclose(fpipe);
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+    if (pipefd[1])
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+	close(pipefd[1]);
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     (void) waitpid(pid, &status, 0);
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     pid = 0;
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@@ -314,20 +268,6 @@ static int runGPG(sigTarget sigt, const
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     } else {
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 	rc = 0;
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     }
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-
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-exit:
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-
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-    if (fnamedPipe)
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-	Fclose(fnamedPipe);
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-
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-    if (pid)
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-	waitpid(pid, &status, 0);
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-
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-    if (namedPipeName) {
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-	rpmRmTempFifo(namedPipeName);
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-	free(namedPipeName);
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-    }
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-
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     return rc;
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 }
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