demos/spkigen.c

   1 /* NOCW */
   2 /*-
   3  * demos/spkigen.c
   4  * 18-Mar-1997 - eay - A quick hack :-)
   5  *              version 1.1, it would probably help to save or load the
   6  *              private key :-)
   7  */
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <openssl/err.h>
  11 #include <openssl/asn1.h>
  12 #include <openssl/objects.h>
  13 #include <openssl/evp.h>
  14 #include <openssl/x509.h>
  15 #include <openssl/pem.h>
  16
  17 /* The following two don't exist in SSLeay but they are in here as
  18  * examples */
  19 #define PEM_write_SPKI(fp,x) \
  20         PEM_ASN1_write((int (*)())i2d_NETSCAPE_SPKI,"SPKI",fp,\
  21                         (char *)x,NULL,NULL,0,NULL)
  22 int SPKI_set_pubkey(NETSCAPE_SPKI *x, EVP_PKEY *pkey);
  23
  24 /* These are defined in the next version of SSLeay */
  25 int EVP_PKEY_assign(EVP_PKEY *pkey, int type,char *key);
  26 #define RSA_F4  0x10001
  27 #define EVP_PKEY_assign_RSA(pkey,rsa) EVP_PKEY_assign((pkey),EVP_PKEY_RSA,\
  28                                         (char *)(rsa))
  29
  30 int main(argc,argv)
  31 int argc;
  32 char *argv[];
  33         {
  34         RSA *rsa=NULL;
  35         NETSCAPE_SPKI *spki=NULL;
  36         EVP_PKEY *pkey=NULL;
  37         char buf[128];
  38         int ok=0,i;
  39         FILE *fp;
  40
  41         pkey=EVP_PKEY_new();
  42
  43         if (argc < 2)
  44                 {
  45                 /* Generate an RSA key, the random state should have been seeded
  46                  * with lots of calls to RAND_seed(....) */
  47                 fprintf(stderr,"generating RSA key, could take some time...\n");
  48                 if ((rsa=RSA_generate_key(512,RSA_F4,NULL)) == NULL) goto err;
  49                 }
  50         else
  51                 {
  52                 if ((fp=fopen(argv[1],"r")) == NULL)
  53                         { perror(argv[1]); goto err; }
  54                 if ((rsa=PEM_read_RSAPrivateKey(fp,NULL,NULL)) == NULL)
  55                         goto err;
  56                 fclose(fp);
  57                 }
  58
  59         if (!EVP_PKEY_assign_RSA(pkey,rsa)) goto err;
  60         rsa=NULL;
  61
  62         /* lets make the spki and set the public key and challenge */
  63         if ((spki=NETSCAPE_SPKI_new()) == NULL) goto err;
  64
  65         if (!SPKI_set_pubkey(spki,pkey)) goto err;
  66
  67         fprintf(stderr,"please enter challenge string:");
  68         fflush(stderr);
  69         buf[0]='\0';
  70         fgets(buf,sizeof buf,stdin);
  71         i=strlen(buf);
  72         if (i > 0) buf[--i]='\0';
  73         if (!ASN1_STRING_set((ASN1_STRING *)spki->spkac->challenge,
  74                 buf,i)) goto err;
  75
  76         if (!NETSCAPE_SPKI_sign(spki,pkey,EVP_md5())) goto err;
  77         PEM_write_SPKI(stdout,spki);
  78         if (argc < 2)
  79                 PEM_write_RSAPrivateKey(stdout,pkey->pkey.rsa,NULL,NULL,0,NULL);
  80
  81         ok=1;
  82 err:
  83         if (!ok)
  84                 {
  85                 fprintf(stderr,"something bad happened....");
  86                 ERR_print_errors_fp(stderr);
  87                 }
  88         NETSCAPE_SPKI_free(spki);
  89         EVP_PKEY_free(pkey);
  90         exit(!ok);
  91         }
  92
  93 /* This function is in the next version of SSLeay */
  94 int EVP_PKEY_assign(pkey,type,key)
  95 EVP_PKEY *pkey;
  96 int type;
  97 char *key;
  98         {
  99         if (pkey == NULL) return(0);
 100         if (pkey->pkey.ptr != NULL)
 101                 {
 102                 if (pkey->type == EVP_PKEY_RSA)
 103                         RSA_free(pkey->pkey.rsa);
 104                 /* else memory leak */
 105                 }
 106         pkey->type=type;
 107         pkey->pkey.ptr=key;
 108         return(1);
 109         }
 110
 111 /* While I have a
 112  * X509_set_pubkey() and X509_REQ_set_pubkey(), SPKI_set_pubkey() does
 113  * not currently exist so here is a version of it.
 114  * The next SSLeay release will probably have
 115  * X509_set_pubkey(),
 116  * X509_REQ_set_pubkey() and
 117  * NETSCAPE_SPKI_set_pubkey()
 118  * as macros calling the same function */
 119 int SPKI_set_pubkey(x,pkey)
 120 NETSCAPE_SPKI *x;
 121 EVP_PKEY *pkey;
 122         {
 123         int ok=0;
 124         X509_PUBKEY *pk;
 125         X509_ALGOR *a;
 126         ASN1_OBJECT *o;
 127         unsigned char *s,*p;
 128         int i;
 129
 130         if (x == NULL) return(0);
 131
 132         if ((pk=X509_PUBKEY_new()) == NULL) goto err;
 133         a=pk->algor;
 134
 135         /* set the algorithm id */
 136         if ((o=OBJ_nid2obj(pkey->type)) == NULL) goto err;
 137         ASN1_OBJECT_free(a->algorithm);
 138         a->algorithm=o;
 139
 140         /* Set the parameter list */
 141         if ((a->parameter == NULL) || (a->parameter->type != V_ASN1_NULL))
 142                 {
 143                 ASN1_TYPE_free(a->parameter);
 144                 a->parameter=ASN1_TYPE_new();
 145                 a->parameter->type=V_ASN1_NULL;
 146                 }
 147         i=i2d_PublicKey(pkey,NULL);
 148         if ((s=(unsigned char *)malloc(i+1)) == NULL) goto err;
 149         p=s;
 150         i2d_PublicKey(pkey,&p);
 151         if (!ASN1_BIT_STRING_set(pk->public_key,s,i)) goto err;
 152         free(s);
 153
 154         X509_PUBKEY_free(x->spkac->pubkey);
 155         x->spkac->pubkey=pk;
 156         pk=NULL;
 157         ok=1;
 158 err:
 159         if (pk != NULL) X509_PUBKEY_free(pk);
 160         return(ok);
 161         }
 162