git: c15ed41118c9 - stable/13 - dumpon: provide diag info when `PEM_read_RSA_PUBKEY` fails

The branch stable/13 has been updated by ngie:

URL: https://cgit.FreeBSD.org/src/commit/?id=c15ed41118c9174160a1a854355320558b48928d

commit c15ed41118c9174160a1a854355320558b48928d
Author:     Enji Cooper <ngie@FreeBSD.org>
AuthorDate: 2023-05-27 01:02:34 +0000
Commit:     Enji Cooper <ngie@FreeBSD.org>
CommitDate: 2025-03-26 21:36:43 +0000

    dumpon: provide diag info when `PEM_read_RSA_PUBKEY` fails
    
    This change modifies dumpon to print out the last error from OpenSSL
    when `PEM_read_RSA_PUBKEY` fails. This allows end-users to diagnose why
    reading in RSA pubkey files fails so they can adjust the usage to meet
    the needs of the command.
    
    MFC after:      1 week
    
    (cherry picked from commit 52b63df9b6dfc157fb0b9f61a770b64e3663dee9)
---
 sbin/dumpon/dumpon.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sbin/dumpon/dumpon.c b/sbin/dumpon/dumpon.c
index d12df7bf0c4d..ca25d38c09e8 100644
--- a/sbin/dumpon/dumpon.c
+++ b/sbin/dumpon/dumpon.c
@@ -267,7 +267,8 @@ genkey(const char *pubkeyfile, struct diocskerneldump_arg *kdap)
 	fclose(fp);
 	fp = NULL;
 	if (pubkey == NULL)
-		errx(1, "Unable to read data from %s.", pubkeyfile);
+		errx(1, "Unable to read data from %s: %s", pubkeyfile,
+		    ERR_error_string(ERR_get_error(), NULL));
 
 	/*
 	 * RSA keys under ~1024 bits are trivially factorable (2018).  OpenSSL