Found the following significant warnings:
  pki-x509.c:185:5: warning: ‘EVP_PKEY_get1_RSA’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:188:9: warning: ‘i2d_RSAPrivateKey’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:193:9: warning: ‘i2d_RSAPrivateKey’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:201:9: warning: ‘i2d_RSA_PUBKEY’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:206:9: warning: ‘i2d_RSA_PUBKEY’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:399:5: warning: ‘EVP_PKEY_get1_RSA’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:402:5: warning: ‘RSA_public_encrypt’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:445:5: warning: ‘EVP_PKEY_get1_RSA’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:448:5: warning: ‘RSA_private_decrypt’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:486:9: warning: ‘MD5’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:530:5: warning: ‘EVP_PKEY_get1_RSA’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:533:5: warning: ‘RSA_sign’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:571:5: warning: ‘EVP_PKEY_get1_RSA’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:576:23: warning: ‘RSA_verify’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:592:9: warning: ‘d2i_RSAPrivateKey’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:596:9: warning: ‘EVP_PKEY_assign’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:618:5: warning: ‘d2i_RSA_PUBKEY’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:622:5: warning: ‘EVP_PKEY_assign’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:639:5: warning: ‘RSA_new’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:645:13: warning: ‘RSA_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:649:9: warning: ‘RSA_generate_key_ex’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:651:13: warning: ‘RSA_free’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
  pki-x509.c:659:5: warning: ‘EVP_PKEY_assign’ is deprecated: Since OpenSSL 3.0 [-Wdeprecated-declarations]
See ‘/home/hornik/tmp/R.check/r-devel-gcc/Work/PKGS/PKI.Rcheck/00install.out’ for details.