References:
    https://datatracker.ietf.org/doc/draft-ietf-sidrops-rpki-prefixlist/
    https://www.iana.org/assignments/smi-numbers/smi-numbers.xhtml#security-smime-1

OK?

Index: lib/libcrypto/objects/obj_mac.num
===================================================================
RCS file: /cvs/src/lib/libcrypto/objects/obj_mac.num,v
diff -u -p -r1.34 obj_mac.num
--- lib/libcrypto/objects/obj_mac.num	27 Jan 2024 07:28:28 -0000	1.34
+++ lib/libcrypto/objects/obj_mac.num	29 Jan 2024 20:24:26 -0000
@@ -1051,3 +1051,4 @@ RSA_SHA3_256	1050
 RSA_SHA3_384	1051
 RSA_SHA3_512	1052
 acmeIdentifier	1053
+id_ct_rpkiSignedPrefixList	1054
Index: lib/libcrypto/objects/objects.txt
===================================================================
RCS file: /cvs/src/lib/libcrypto/objects/objects.txt,v
diff -u -p -r1.41 objects.txt
--- lib/libcrypto/objects/objects.txt	27 Jan 2024 07:27:41 -0000	1.41
+++ lib/libcrypto/objects/objects.txt	29 Jan 2024 20:24:26 -0000
@@ -268,6 +268,7 @@ id-smime-ct 47		: id-ct-geofeedCSVwithCR
 id-smime-ct 48		: id-ct-signedChecklist
 id-smime-ct 49		: id-ct-ASPA
 id-smime-ct 50		: id-ct-signedTAL
+id-smime-ct 51		: id-ct-rpkiSignedPrefixList
 
 # S/MIME Attributes
 id-smime-aa 1		: id-smime-aa-receiptRequest