New -force_pubkey option to x509 utility to supply a different public

key to the one in a request. This is useful for cases where the public
key cannot be used for signing e.g. DH.
(cherry picked from commit 43206a2d7cc87c959535c0f69e2aa3b364eafd6e)

diff --git a/apps/x509.c b/apps/x509.c
index 361eca624e24756fd9658846a457b59968b46008..788eb7b3d0a94ae13b8624f478107874ced073c4 100644 (file)
--- a/apps/x509.c
+++ b/apps/x509.c
@@ -174,7 +174,7 @@ int MAIN(int argc, char **argv)
        X509 *x=NULL,*xca=NULL;
        ASN1_OBJECT *objtmp;
        STACK_OF(OPENSSL_STRING) *sigopts = NULL;
-       EVP_PKEY *Upkey=NULL,*CApkey=NULL;
+       EVP_PKEY *Upkey=NULL,*CApkey=NULL, *fkey = NULL;
        ASN1_INTEGER *sno = NULL;
        int i,num,badops=0;
        BIO *out=NULL;
@@ -183,6 +183,7 @@ int MAIN(int argc, char **argv)
        int informat,outformat,keyformat,CAformat,CAkeyformat;
        char *infile=NULL,*outfile=NULL,*keyfile=NULL,*CAfile=NULL;
        char *CAkeyfile=NULL,*CAserial=NULL;
+       char *fkeyfile=NULL;
        char *alias=NULL;
        int text=0,serial=0,subject=0,issuer=0,startdate=0,enddate=0;
        int next_serial=0;
@@ -349,6 +350,11 @@ int MAIN(int argc, char **argv)
                        if (!(sno = s2i_ASN1_INTEGER(NULL, *(++argv))))
                                goto bad;
                        }
+               else if (strcmp(*argv,"-force_pubkey") == 0)
+                       {
+                       if (--argc < 1) goto bad;
+                       fkeyfile= *(++argv);
+                       }
                else if (strcmp(*argv,"-addtrust") == 0)
                        {
                        if (--argc < 1) goto bad;
@@ -534,6 +540,13 @@ bad:
                goto end;
                }
 
+       if (fkeyfile)
+               {
+               fkey = load_pubkey(bio_err, fkeyfile, keyformat, 0,
+                                               NULL, e, "Forced key");
+               if (fkey == NULL) goto end;
+               }
+
        if ((CAkeyfile == NULL) && (CA_flag) && (CAformat == FORMAT_PEM))
                { CAkeyfile=CAfile; }
        else if ((CA_flag) && (CAkeyfile == NULL))
@@ -670,10 +683,14 @@ bad:
 
                X509_gmtime_adj(X509_get_notBefore(x),0);
                X509_time_adj_ex(X509_get_notAfter(x),days, 0, NULL);
-
-               pkey = X509_REQ_get_pubkey(req);
-               X509_set_pubkey(x,pkey);
-               EVP_PKEY_free(pkey);
+               if (fkey)
+                       X509_set_pubkey(x, fkey);
+               else
+                       {
+                       pkey = X509_REQ_get_pubkey(req);
+                       X509_set_pubkey(x,pkey);
+                       EVP_PKEY_free(pkey);
+                       }
                }
        else
                x=load_cert(bio_err,infile,informat,NULL,e,"Certificate");
@@ -1112,6 +1129,7 @@ end:
        X509_free(xca);
        EVP_PKEY_free(Upkey);
        EVP_PKEY_free(CApkey);
+       EVP_PKEY_free(fkey);
        if (sigopts)
                sk_OPENSSL_STRING_free(sigopts);
        X509_REQ_free(rq);