crypto/external/bsd/openssl/dist/demos/x509/mkcert.c

   1 /*
   2  * Certificate creation. Demonstrates some certificate related operations.
   3  */
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7
   8 #include <openssl/pem.h>
   9 #include <openssl/conf.h>
  10 #include <openssl/x509v3.h>
  11 #ifndef OPENSSL_NO_ENGINE
  12 # include <openssl/engine.h>
  13 #endif
  14
  15 int mkcert(X509 **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days);
  16 int add_ext(X509 *cert, int nid, char *value);
  17
  18 int main(int argc, char **argv)
  19 {
  20     BIO *bio_err;
  21     X509 *x509 = NULL;
  22     EVP_PKEY *pkey = NULL;
  23
  24     CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
  25
  26     bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
  27
  28     mkcert(&x509, &pkey, 512, 0, 365);
  29
  30     RSA_print_fp(stdout, pkey->pkey.rsa, 0);
  31     X509_print_fp(stdout, x509);
  32
  33     PEM_write_PrivateKey(stdout, pkey, NULL, NULL, 0, NULL, NULL);
  34     PEM_write_X509(stdout, x509);
  35
  36     X509_free(x509);
  37     EVP_PKEY_free(pkey);
  38
  39 #ifndef OPENSSL_NO_ENGINE
  40     ENGINE_cleanup();
  41 #endif
  42     CRYPTO_cleanup_all_ex_data();
  43
  44     CRYPTO_mem_leaks(bio_err);
  45     BIO_free(bio_err);
  46     return (0);
  47 }
  48
  49 static void callback(int p, int n, void *arg)
  50 {
  51     char c = 'B';
  52
  53     if (p == 0)
  54         c = '.';
  55     if (p == 1)
  56         c = '+';
  57     if (p == 2)
  58         c = '*';
  59     if (p == 3)
  60         c = '\n';
  61     fputc(c, stderr);
  62 }
  63
  64 int mkcert(X509 **x509p, EVP_PKEY **pkeyp, int bits, int serial, int days)
  65 {
  66     X509 *x;
  67     EVP_PKEY *pk;
  68     RSA *rsa;
  69     X509_NAME *name = NULL;
  70
  71     if ((pkeyp == NULL) || (*pkeyp == NULL)) {
  72         if ((pk = EVP_PKEY_new()) == NULL) {
  73             abort();
  74             return (0);
  75         }
  76     } else
  77         pk = *pkeyp;
  78
  79     if ((x509p == NULL) || (*x509p == NULL)) {
  80         if ((x = X509_new()) == NULL)
  81             goto err;
  82     } else
  83         x = *x509p;
  84
  85     rsa = RSA_generate_key(bits, RSA_F4, callback, NULL);
  86     if (!EVP_PKEY_assign_RSA(pk, rsa)) {
  87         abort();
  88         goto err;
  89     }
  90     rsa = NULL;
  91
  92     X509_set_version(x, 2);
  93     ASN1_INTEGER_set(X509_get_serialNumber(x), serial);
  94     X509_gmtime_adj(X509_get_notBefore(x), 0);
  95     X509_gmtime_adj(X509_get_notAfter(x), (long)60 * 60 * 24 * days);
  96     X509_set_pubkey(x, pk);
  97
  98     name = X509_get_subject_name(x);
  99
 100     /*
 101      * This function creates and adds the entry, working out the correct
 102      * string type and performing checks on its length. Normally we'd check
 103      * the return value for errors...
 104      */
 105     X509_NAME_add_entry_by_txt(name, "C", MBSTRING_ASC, "UK", -1, -1, 0);
 106     X509_NAME_add_entry_by_txt(name, "CN",
 107                                MBSTRING_ASC, "OpenSSL Group", -1, -1, 0);
 108
 109     /*
 110      * Its self signed so set the issuer name to be the same as the subject.
 111      */
 112     X509_set_issuer_name(x, name);
 113
 114     /* Add various extensions: standard extensions */
 115     add_ext(x, NID_basic_constraints, "critical,CA:TRUE");
 116     add_ext(x, NID_key_usage, "critical,keyCertSign,cRLSign");
 117
 118     add_ext(x, NID_subject_key_identifier, "hash");
 119
 120     /* Some Netscape specific extensions */
 121     add_ext(x, NID_netscape_cert_type, "sslCA");
 122
 123     add_ext(x, NID_netscape_comment, "example comment extension");
 124
 125 #ifdef CUSTOM_EXT
 126     /* Maybe even add our own extension based on existing */
 127     {
 128         int nid;
 129         nid = OBJ_create("1.2.3.4", "MyAlias", "My Test Alias Extension");
 130         X509V3_EXT_add_alias(nid, NID_netscape_comment);
 131         add_ext(x, nid, "example comment alias");
 132     }
 133 #endif
 134
 135     if (!X509_sign(x, pk, EVP_sha1()))
 136         goto err;
 137
 138     *x509p = x;
 139     *pkeyp = pk;
 140     return (1);
 141  err:
 142     return (0);
 143 }
 144
 145 /*
 146  * Add extension using V3 code: we can set the config file as NULL because we
 147  * wont reference any other sections.
 148  */
 149
 150 int add_ext(X509 *cert, int nid, char *value)
 151 {
 152     X509_EXTENSION *ex;
 153     X509V3_CTX ctx;
 154     /* This sets the 'context' of the extensions. */
 155     /* No configuration database */
 156     X509V3_set_ctx_nodb(&ctx);
 157     /*
 158      * Issuer and subject certs: both the target since it is self signed, no
 159      * request and no CRL
 160      */
 161     X509V3_set_ctx(&ctx, cert, cert, NULL, NULL, 0);
 162     ex = X509V3_EXT_conf_nid(NULL, &ctx, nid, value);
 163     if (!ex)
 164         return 0;
 165
 166     X509_add_ext(cert, ex, -1);
 167     X509_EXTENSION_free(ex);
 168     return 1;
 169 }