NULL tofree when it is freed to avoid double free.
[openssl.git] / apps / ca.c
index 442107001905bcc4307da7616c0a8533abd9e2e2..0ef23ad79fe54a45e97f34d203191663ae10d9ad 100644 (file)
--- a/apps/ca.c
+++ b/apps/ca.c
@@ -64,7 +64,6 @@
 #include <ctype.h>
 #include <sys/types.h>
 #include <sys/stat.h>
-#include "apps.h"
 #include <openssl/conf.h>
 #include <openssl/bio.h>
 #include <openssl/err.h>
 #ifdef OPENSSL_SYS_WINDOWS
 #define strcasecmp _stricmp
 #else
-#include <strings.h>
+#  ifdef NO_STRINGS_H
+    int        strcasecmp();
+#  else
+#    include <strings.h>
+#  endif /* NO_STRINGS_H */
 #endif
 
 #ifndef W_OK
 #    else
 #      include <unixlib.h>
 #    endif
-#  else
+#  elif !defined(OPENSSL_SYS_VXWORKS) && !defined(OPENSSL_SYS_WINDOWS)
 #    include <sys/file.h>
 #  endif
 #endif
 
+#include "apps.h"
+
 #ifndef W_OK
 #  define F_OK 0
 #  define X_OK 1
@@ -238,7 +243,6 @@ static int do_body(X509 **xret, EVP_PKEY *pkey, X509 *x509, const EVP_MD *dgst,
                int verbose, X509_REQ *req, char *ext_sect, CONF *conf,
        unsigned long certopt, unsigned long nameopt, int default_op,
        int ext_copy);
-static X509_NAME *do_subject(char *subject, int email_dn);
 static int do_revoke(X509 *x509, TXT_DB *db, int ext, char *extval);
 static int get_certificate_status(const char *ser_status, TXT_DB *db);
 static int do_updatedb(TXT_DB *db);
@@ -330,6 +334,7 @@ int MAIN(int argc, char **argv)
        MS_STATIC char buf[3][BSIZE];
        char *randfile=NULL;
        char *engine = NULL;
+       char *tofree=NULL;
 
 #ifdef EFENCE
 EF_PROTECT_FREE=1;
@@ -557,24 +562,26 @@ bad:
 
        ERR_load_crypto_strings();
 
-        e = setup_engine(bio_err, engine, 0);
+       e = setup_engine(bio_err, engine, 0);
 
        /*****************************************************************/
+       tofree=NULL;
        if (configfile == NULL) configfile = getenv("OPENSSL_CONF");
        if (configfile == NULL) configfile = getenv("SSLEAY_CONF");
        if (configfile == NULL)
                {
-               /* We will just use 'buf[0]' as a temporary buffer.  */
+               const char *s=X509_get_default_cert_area();
+
 #ifdef OPENSSL_SYS_VMS
-               strncpy(buf[0],X509_get_default_cert_area(),
-                       sizeof(buf[0])-1-sizeof(CONFIG_FILE));
+               tofree=OPENSSL_malloc(strlen(s)+sizeof(CONFIG_FILE));
+               strcpy(tofree,s);
 #else
-               strncpy(buf[0],X509_get_default_cert_area(),
-                       sizeof(buf[0])-2-sizeof(CONFIG_FILE));
-               strcat(buf[0],"/");
+               tofree=OPENSSL_malloc(strlen(s)+sizeof(CONFIG_FILE)+1);
+               strcpy(tofree,s);
+               strcat(tofree,"/");
 #endif
-               strcat(buf[0],CONFIG_FILE);
-               configfile=buf[0];
+               strcat(tofree,CONFIG_FILE);
+               configfile=tofree;
                }
 
        BIO_printf(bio_err,"Using configuration from %s\n",configfile);
@@ -589,6 +596,14 @@ bad:
                                ,errorline,configfile);
                goto err;
                }
+       if(tofree)
+               {
+               OPENSSL_free(tofree);
+               tofree = NULL;
+               }
+
+       if (!load_config(bio_err, conf))
+               goto err;
 
        /* Lets get the config section we are using */
        if (section == NULL)
@@ -692,9 +707,9 @@ bad:
                        goto err;
                        }
                }
-       pkey = load_key(bio_err, keyfile, keyform, key, e, 
+       pkey = load_key(bio_err, keyfile, keyform, 0, key, e, 
                "CA private key");
-       if (key) memset(key,0,strlen(key));
+       if (key) OPENSSL_cleanse(key,strlen(key));
        if (pkey == NULL)
                {
                /* load_key() has already printed an appropriate message */
@@ -1009,7 +1024,7 @@ bad:
                        }
 
                if (verbose)
-                       BIO_printf(bio_err, "Succesfully loaded extensions file %s\n", extfile);
+                       BIO_printf(bio_err, "Successfully loaded extensions file %s\n", extfile);
 
                /* We can have sections in the ext file */
                if (!extensions && !(extensions = NCONF_get_string(extconf, "default", "extensions")))
@@ -1151,9 +1166,14 @@ bad:
                        }
                if (verbose)
                        {
-                       if ((f=BN_bn2hex(serial)) == NULL) goto err;
-                       BIO_printf(bio_err,"next serial number is %s\n",f);
-                       OPENSSL_free(f);
+                       if (BN_is_zero(serial))
+                               BIO_printf(bio_err,"next serial number is 00\n");
+                       else
+                               {
+                               if ((f=BN_bn2hex(serial)) == NULL) goto err;
+                               BIO_printf(bio_err,"next serial number is %s\n",f);
+                               OPENSSL_free(f);
+                               }
                        }
 
                if ((attribs=NCONF_get_section(conf,policy)) == NULL)
@@ -1273,7 +1293,13 @@ bad:
 
                        BIO_printf(bio_err,"Write out database with %d new entries\n",sk_X509_num(cert_sk));
 
-                       strncpy(buf[0],serialfile,BSIZE-4);
+                       if(strlen(serialfile) > BSIZE-5 || strlen(dbfile) > BSIZE-5)
+                               {
+                               BIO_printf(bio_err,"file name too long\n");
+                               goto err;
+                               }
+
+                       strcpy(buf[0],serialfile);
 
 #ifdef OPENSSL_SYS_VMS
                        strcat(buf[0],"-new");
@@ -1283,7 +1309,7 @@ bad:
 
                        if (!save_serial(buf[0],serial)) goto err;
 
-                       strncpy(buf[1],dbfile,BSIZE-4);
+                       strcpy(buf[1],dbfile);
 
 #ifdef OPENSSL_SYS_VMS
                        strcat(buf[1],"-new");
@@ -1313,7 +1339,13 @@ bad:
                        j=x->cert_info->serialNumber->length;
                        p=(char *)x->cert_info->serialNumber->data;
                        
-                       strncpy(buf[2],outdir,BSIZE-(j*2)-6);
+                       if(strlen(outdir) >= (size_t)(j ? BSIZE-j*2-6 : BSIZE-8))
+                               {
+                               BIO_printf(bio_err,"certificate file name too long\n");
+                               goto err;
+                               }
+
+                       strcpy(buf[2],outdir);
 
 #ifndef OPENSSL_SYS_VMS
                        strcat(buf[2],"/");
@@ -1351,6 +1383,7 @@ bad:
                        {
                        /* Rename the database and the serial file */
                        strncpy(buf[2],serialfile,BSIZE-4);
+                       buf[2][BSIZE-4]='\0';
 
 #ifdef OPENSSL_SYS_VMS
                        strcat(buf[2],"-old");
@@ -1379,6 +1412,7 @@ bad:
                                }
 
                        strncpy(buf[2],dbfile,BSIZE-4);
+                       buf[2][BSIZE-4]='\0';
 
 #ifdef OPENSSL_SYS_VMS
                        strcat(buf[2],"-old");
@@ -1442,13 +1476,13 @@ bad:
                        }
                if ((crldays == 0) && (crlhours == 0))
                        {
-                       BIO_printf(bio_err,"cannot lookup how long until the next CRL is issuer\n");
+                       BIO_printf(bio_err,"cannot lookup how long until the next CRL is issued\n");
                        goto err;
                        }
 
                if (verbose) BIO_printf(bio_err,"making CRL\n");
                if ((crl=X509_CRL_new()) == NULL) goto err;
-               if (!X509_CRL_set_issuer_name(crl, X509_get_issuer_name(x509))) goto err;
+               if (!X509_CRL_set_issuer_name(crl, X509_get_subject_name(x509))) goto err;
 
                tmptm = ASN1_TIME_new();
                if (!tmptm) goto err;
@@ -1501,6 +1535,11 @@ bad:
                        if (pkey->type == EVP_PKEY_DSA) 
                                dgst=EVP_dss1();
                        else
+#endif
+#ifndef OPENSSL_NO_ECDSA
+                       if (pkey->type == EVP_PKEY_EC)
+                               dgst=EVP_ecdsa();
+                       else
 #endif
                                dgst=EVP_md5();
                        }
@@ -1545,7 +1584,13 @@ bad:
                        if (j <= 0) goto err;
                        X509_free(revcert);
 
-                       strncpy(buf[0],dbfile,BSIZE-4);
+                       if(strlen(dbfile) > BSIZE-5)
+                               {
+                               BIO_printf(bio_err,"filename too long\n");
+                               goto err;
+                               }
+
+                       strcpy(buf[0],dbfile);
 #ifndef OPENSSL_SYS_VMS
                        strcat(buf[0],".new");
 #else
@@ -1560,11 +1605,16 @@ bad:
                        j=TXT_DB_write(out,db);
                        if (j <= 0) goto err;
                        strncpy(buf[1],dbfile,BSIZE-4);
+                       buf[1][BSIZE-4]='\0';
 #ifndef OPENSSL_SYS_VMS
                        strcat(buf[1],".old");
 #else
                        strcat(buf[1],"-old");
 #endif
+                       BIO_free(in);
+                       in = NULL;
+                       BIO_free(out);
+                       out = NULL;
                        if (rename(dbfile,buf[1]) < 0)
                                {
                                BIO_printf(bio_err,"unable to rename %s to %s\n", dbfile, buf[1]);
@@ -1584,6 +1634,8 @@ bad:
        /*****************************************************************/
        ret=0;
 err:
+       if(tofree)
+               OPENSSL_free(tofree);
        BIO_free_all(Cout);
        BIO_free_all(Sout);
        BIO_free_all(out);
@@ -1593,7 +1645,7 @@ err:
 
        if (ret) ERR_print_errors(bio_err);
        app_RAND_write_file(randfile, bio_err);
-       if (free_key)
+       if (free_key & key)
                OPENSSL_free(key);
        BN_free(serial);
        TXT_DB_free(db);
@@ -1603,7 +1655,7 @@ err:
        NCONF_free(conf);
        OBJ_cleanup();
        apps_shutdown();
-       EXIT(ret);
+       OPENSSL_EXIT(ret);
        }
 
 static void lookup_fail(char *name, char *tag)
@@ -1668,7 +1720,7 @@ static BIGNUM *load_serial(char *serialfile)
        ret=ASN1_INTEGER_to_BN(ai,NULL);
        if (ret == NULL)
                {
-               BIO_printf(bio_err,"error converting number from bin to BIGNUM");
+               BIO_printf(bio_err,"error converting number from bin to BIGNUM\n");
                goto err;
                }
 err:
@@ -1859,7 +1911,7 @@ static int do_body(X509 **xret, EVP_PKEY *pkey, X509 *x509, const EVP_MD *dgst,
 
        if (subj)
                {
-               X509_NAME *n = do_subject(subj, email_dn);
+               X509_NAME *n = do_subject(subj, MBSTRING_ASC);
 
                if (!n)
                        {
@@ -2063,7 +2115,7 @@ again2:
                        goto err;
                        }
                while((i = X509_NAME_get_index_by_NID(dn_subject,
-                                       NID_pkcs9_emailAddress, -1) >= 0))
+                                       NID_pkcs9_emailAddress, -1)) >= 0)
                        {
                        tmpne = X509_NAME_get_entry(dn_subject, i);
                        X509_NAME_delete_entry(dn_subject, i);
@@ -2071,9 +2123,11 @@ again2:
                        }
                }
 
-       row[DB_name]=X509_NAME_oneline(dn_subject,NULL,0);
-       row[DB_serial]=BN_bn2hex(serial);
-       if ((row[DB_name] == NULL) || (row[DB_serial] == NULL))
+       if (BN_is_zero(serial))
+               row[DB_serial]=BUF_strdup("00");
+       else
+               row[DB_serial]=BN_bn2hex(serial);
+       if (row[DB_serial] == NULL)
                {
                BIO_printf(bio_err,"Memory allocation failure\n");
                goto err;
@@ -2270,6 +2324,16 @@ again2:
                EVP_PKEY_copy_parameters(pktmp,pkey);
        EVP_PKEY_free(pktmp);
 #endif
+#ifndef OPENSSL_NO_ECDSA
+       if (pkey->type == EVP_PKEY_EC)
+               dgst = EVP_ecdsa();
+       pktmp = X509_get_pubkey(ret);
+       if (EVP_PKEY_missing_parameters(pktmp) &&
+               !EVP_PKEY_missing_parameters(pkey))
+               EVP_PKEY_copy_parameters(pktmp, pkey);
+       EVP_PKEY_free(pktmp);
+#endif
+
 
        if (!X509_sign(ret,pkey,dgst))
                goto err;
@@ -2286,10 +2350,10 @@ again2:
 
        /* row[DB_serial] done already */
        row[DB_file]=(char *)OPENSSL_malloc(8);
-       /* row[DB_name] done already */
+       row[DB_name]=X509_NAME_oneline(X509_get_subject_name(ret),NULL,0);
 
        if ((row[DB_type] == NULL) || (row[DB_exp_date] == NULL) ||
-               (row[DB_file] == NULL))
+               (row[DB_file] == NULL) || (row[DB_name] == NULL))
                {
                BIO_printf(bio_err,"Memory allocation failure\n");
                goto err;
@@ -2556,7 +2620,10 @@ static int do_revoke(X509 *x509, TXT_DB *db, int type, char *value)
                row[i]=NULL;
        row[DB_name]=X509_NAME_oneline(X509_get_subject_name(x509),NULL,0);
        bn = ASN1_INTEGER_to_BN(X509_get_serialNumber(x509),NULL);
-       row[DB_serial]=BN_bn2hex(bn);
+       if (BN_is_zero(bn))
+               row[DB_serial]=BUF_strdup("00");
+       else
+               row[DB_serial]=BN_bn2hex(bn);
        BN_free(bn);
        if ((row[DB_name] == NULL) || (row[DB_serial] == NULL))
                {
@@ -2993,68 +3060,128 @@ int make_revoked(X509_REVOKED *rev, char *str)
        return ret;
        }
 
-static X509_NAME *do_subject(char *subject, int email_dn)
+/*
+ * subject is expected to be in the format /type0=value0/type1=value1/type2=...
+ * where characters may be escaped by \
+ */
+X509_NAME *do_subject(char *subject, long chtype)
        {
-       X509_NAME *n = NULL;
+       size_t buflen = strlen(subject)+1; /* to copy the types and values into. due to escaping, the copy can only become shorter */
+       char *buf = OPENSSL_malloc(buflen);
+       size_t max_ne = buflen / 2 + 1; /* maximum number of name elements */
+       char **ne_types = OPENSSL_malloc(max_ne * sizeof (char *));
+       char **ne_values = OPENSSL_malloc(max_ne * sizeof (char *));
 
-       int i, nid, ne_num=0;
+       char *sp = subject, *bp = buf;
+       int i, ne_num = 0;
 
-       char *ne_name = NULL;
-       char *ne_value = NULL;
-
-       char *tmp = NULL;
-       char *p[2];
-
-       char *str_list[256];
-       
-       p[0] = ",/";
-       p[1] = "=";
-
-       n = X509_NAME_new();
+       X509_NAME *n = NULL;
+       int nid;
 
-       tmp = strtok(subject, p[0]);
-       while((tmp != NULL) && (ne_num < (sizeof str_list/sizeof *str_list)))
+       if (!buf || !ne_types || !ne_values)
                {
-               char *token = tmp;
+               BIO_printf(bio_err, "malloc error\n");
+               goto error;
+               }       
 
-               while (token[0] == ' ')
-                       token++;
-               str_list[ne_num] = token;
+       if (*subject != '/')
+               {
+               BIO_printf(bio_err, "Subject does not start with '/'.\n");
+               goto error;
+               }
+       sp++; /* skip leading / */
 
-               tmp = strtok(NULL, p[0]);
+       while (*sp)
+               {
+               /* collect type */
+               ne_types[ne_num] = bp;
+               while (*sp)
+                       {
+                       if (*sp == '\\') /* is there anything to escape in the type...? */
+                               {
+                               if (*++sp)
+                                       *bp++ = *sp++;
+                               else    
+                                       {
+                                       BIO_printf(bio_err, "escape character at end of string\n");
+                                       goto error;
+                                       }
+                               }       
+                       else if (*sp == '=')
+                               {
+                               sp++;
+                               *bp++ = '\0';
+                               break;
+                               }
+                       else
+                               *bp++ = *sp++;
+                       }
+               if (!*sp)
+                       {
+                       BIO_printf(bio_err, "end of string encountered while processing type of subject name element #%d\n", ne_num);
+                       goto error;
+                       }
+               ne_values[ne_num] = bp;
+               while (*sp)
+                       {
+                       if (*sp == '\\')
+                               {
+                               if (*++sp)
+                                       *bp++ = *sp++;
+                               else
+                                       {
+                                       BIO_printf(bio_err, "escape character at end of string\n");
+                                       goto error;
+                                       }
+                               }
+                       else if (*sp == '/')
+                               {
+                               sp++;
+                               break;
+                               }
+                       else
+                               *bp++ = *sp++;
+                       }
+               *bp++ = '\0';
                ne_num++;
-               }
+               }       
+
+       if (!(n = X509_NAME_new()))
+               goto error;
 
        for (i = 0; i < ne_num; i++)
                {
-               ne_name  = strtok(str_list[i], p[1]);
-               ne_value = strtok(NULL, p[1]);
-
-               if ((nid=OBJ_txt2nid(ne_name)) == NID_undef)
+               if ((nid=OBJ_txt2nid(ne_types[i])) == NID_undef)
                        {
-                       BIO_printf(bio_err, "Subject Attribute %s has no known NID, skipped\n", ne_name);
+                       BIO_printf(bio_err, "Subject Attribute %s has no known NID, skipped\n", ne_types[i]);
                        continue;
                        }
 
-               if (ne_value == NULL)
+               if (!*ne_values[i])
                        {
-                       BIO_printf(bio_err, "No value provided for Subject Attribute %s, skipped\n", ne_name);
+                       BIO_printf(bio_err, "No value provided for Subject Attribute %s, skipped\n", ne_types[i]);
                        continue;
                        }
 
-               if ((nid == NID_pkcs9_emailAddress) && (email_dn == 0))
-                       continue;
-
-               if (!X509_NAME_add_entry_by_NID(n, nid, MBSTRING_ASC, (unsigned char*)ne_value, -1,-1,0))
-                       {
-                       X509_NAME_free(n);
-                       return NULL;
-                       }
+               if (!X509_NAME_add_entry_by_NID(n, nid, chtype, (unsigned char*)ne_values[i], -1,-1,0))
+                       goto error;
                }
 
+       OPENSSL_free(ne_values);
+       OPENSSL_free(ne_types);
+       OPENSSL_free(buf);
        return n;
-       }
 
+error:
+       X509_NAME_free(n);
+       if (ne_values)
+               OPENSSL_free(ne_values);
+       if (ne_types)
+               OPENSSL_free(ne_types);
+       if (buf)
+               OPENSSL_free(buf);
+       return NULL;
+}
 
 int old_entry_print(BIO *bp, ASN1_OBJECT *obj, ASN1_STRING *str)
        {