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 /*
  18  * The following two don't exist in SSLeay but they are in here as examples
  19  */
  20 #define PEM_write_SPKI(fp,x) \
  21         PEM_ASN1_write((int (*)())i2d_NETSCAPE_SPKI,"SPKI",fp,\
  22                         (char *)x,NULL,NULL,0,NULL)
  23 int SPKI_set_pubkey(NETSCAPE_SPKI *x, EVP_PKEY *pkey);
  24
  25 /* These are defined in the next version of SSLeay */
  26 int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key);
  27 #define RSA_F4  0x10001
  28 #define EVP_PKEY_assign_RSA(pkey,rsa) EVP_PKEY_assign((pkey),EVP_PKEY_RSA,\
  29                                         (char *)(rsa))
  30
  31 int main(argc, argv)
  32 int argc;
  33 char *argv[];
  34 {
  35     RSA *rsa = NULL;
  36     NETSCAPE_SPKI *spki = NULL;
  37     EVP_PKEY *pkey = NULL;
  38     char buf[128];
  39     int ok = 0, i;
  40     FILE *fp;
  41
  42     pkey = EVP_PKEY_new();
  43
  44     if (argc < 2) {
  45         /*
  46          * Generate an RSA key, the random state should have been seeded with
  47          * lots of calls to RAND_seed(....)
  48          */
  49         fprintf(stderr, "generating RSA key, could take some time...\n");
  50         if ((rsa = RSA_generate_key(512, RSA_F4, NULL)) == NULL)
  51             goto err;
  52     } else {
  53         if ((fp = fopen(argv[1], "r")) == NULL) {
  54             perror(argv[1]);
  55             goto err;
  56         }
  57         if ((rsa = PEM_read_RSAPrivateKey(fp, NULL, NULL)) == NULL)
  58             goto err;
  59         fclose(fp);
  60     }
  61
  62     if (!EVP_PKEY_assign_RSA(pkey, rsa))
  63         goto err;
  64     rsa = NULL;
  65
  66     /* lets make the spki and set the public key and challenge */
  67     if ((spki = NETSCAPE_SPKI_new()) == NULL)
  68         goto err;
  69
  70     if (!SPKI_set_pubkey(spki, pkey))
  71         goto err;
  72
  73     fprintf(stderr, "please enter challenge string:");
  74     fflush(stderr);
  75     buf[0] = '\0';
  76     fgets(buf, sizeof buf, stdin);
  77     i = strlen(buf);
  78     if (i > 0)
  79         buf[--i] = '\0';
  80     if (!ASN1_STRING_set((ASN1_STRING *)spki->spkac->challenge, buf, i))
  81         goto err;
  82
  83     if (!NETSCAPE_SPKI_sign(spki, pkey, EVP_md5()))
  84         goto err;
  85     PEM_write_SPKI(stdout, spki);
  86     if (argc < 2)
  87         PEM_write_RSAPrivateKey(stdout, pkey->pkey.rsa, NULL, NULL, 0, NULL);
  88
  89     ok = 1;
  90  err:
  91     if (!ok) {
  92         fprintf(stderr, "something bad happened....");
  93         ERR_print_errors_fp(stderr);
  94     }
  95     NETSCAPE_SPKI_free(spki);
  96     EVP_PKEY_free(pkey);
  97     exit(!ok);
  98 }
  99
 100 /* This function is in the next version of SSLeay */
 101 int EVP_PKEY_assign(pkey, type, key)
 102 EVP_PKEY *pkey;
 103 int type;
 104 char *key;
 105 {
 106     if (pkey == NULL)
 107         return (0);
 108     if (pkey->pkey.ptr != NULL) {
 109         if (pkey->type == EVP_PKEY_RSA)
 110             RSA_free(pkey->pkey.rsa);
 111         /* else memory leak */
 112     }
 113     pkey->type = type;
 114     pkey->pkey.ptr = key;
 115     return (1);
 116 }
 117
 118 /*
 119  * While I have a X509_set_pubkey() and X509_REQ_set_pubkey(),
 120  * SPKI_set_pubkey() does not currently exist so here is a version of it. The
 121  * next SSLeay release will probably have X509_set_pubkey(),
 122  * X509_REQ_set_pubkey() and NETSCAPE_SPKI_set_pubkey() as macros calling the
 123  * same function
 124  */
 125 int SPKI_set_pubkey(x, pkey)
 126 NETSCAPE_SPKI *x;
 127 EVP_PKEY *pkey;
 128 {
 129     int ok = 0;
 130     X509_PUBKEY *pk;
 131     X509_ALGOR *a;
 132     ASN1_OBJECT *o;
 133     unsigned char *s, *p;
 134     int i;
 135
 136     if (x == NULL)
 137         return (0);
 138
 139     if ((pk = X509_PUBKEY_new()) == NULL)
 140         goto err;
 141     a = pk->algor;
 142
 143     /* set the algorithm id */
 144     if ((o = OBJ_nid2obj(pkey->type)) == NULL)
 145         goto err;
 146     ASN1_OBJECT_free(a->algorithm);
 147     a->algorithm = o;
 148
 149     /* Set the parameter list */
 150     if ((a->parameter == NULL) || (a->parameter->type != V_ASN1_NULL)) {
 151         ASN1_TYPE_free(a->parameter);
 152         a->parameter = ASN1_TYPE_new();
 153         a->parameter->type = V_ASN1_NULL;
 154     }
 155     i = i2d_PublicKey(pkey, NULL);
 156     if ((s = (unsigned char *)malloc(i + 1)) == NULL)
 157         goto err;
 158     p = s;
 159     i2d_PublicKey(pkey, &p);
 160     if (!ASN1_BIT_STRING_set(pk->public_key, s, i))
 161         goto err;
 162     free(s);
 163
 164     X509_PUBKEY_free(x->spkac->pubkey);
 165     x->spkac->pubkey = pk;
 166     pk = NULL;
 167     ok = 1;
 168  err:
 169     if (pk != NULL)
 170         X509_PUBKEY_free(pk);
 171     return (ok);
 172 }