/* v3_utl.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 1999.
+ * project.
*/
/* ====================================================================
- * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
+ * Copyright (c) 1999-2003 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
#include "cryptlib.h"
#include <openssl/conf.h>
#include <openssl/x509v3.h>
+#include <openssl/bn.h>
static char *strip_spaces(char *name);
static int sk_strcmp(const char * const *a, const char * const *b);
static void str_free(void *str);
static int append_ia5(STACK **sk, ASN1_IA5STRING *email);
+static int ipv4_from_asc(unsigned char *v4, const char *in);
+static int ipv6_from_asc(unsigned char *v6, const char *in);
+static int ipv6_cb(const char *elem, int len, void *usr);
+static int ipv6_hex(unsigned char *out, const char *in, int inlen);
+
/* Add a CONF_VALUE name value pair to stack */
int X509V3_add_value(const char *name, const char *value,
{
sk_pop_free(sk, str_free);
}
+
+/* Convert IP addresses both IPv4 and IPv6 into an
+ * OCTET STRING compatible with RFC3280.
+ */
+
+ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
+ {
+ unsigned char ipout[16];
+ ASN1_OCTET_STRING *ret;
+ int iplen;
+
+ /* If string contains a ':' assume IPv6 */
+
+ iplen = a2i_ipadd(ipout, ipasc);
+
+ if (!iplen)
+ return NULL;
+
+ ret = ASN1_OCTET_STRING_new();
+ if (!ret)
+ return NULL;
+ if (!ASN1_OCTET_STRING_set(ret, ipout, iplen))
+ {
+ ASN1_OCTET_STRING_free(ret);
+ return NULL;
+ }
+ return ret;
+ }
+
+ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
+ {
+ ASN1_OCTET_STRING *ret = NULL;
+ unsigned char ipout[32];
+ char *iptmp = NULL, *p;
+ int iplen1, iplen2;
+ p = strchr(ipasc,'/');
+ if (!p)
+ return NULL;
+ iptmp = BUF_strdup(ipasc);
+ if (!iptmp)
+ return NULL;
+ p = iptmp + (p - ipasc);
+ *p++ = 0;
+
+ iplen1 = a2i_ipadd(ipout, iptmp);
+
+ if (!iplen1)
+ goto err;
+
+ iplen2 = a2i_ipadd(ipout + iplen1, p);
+
+ OPENSSL_free(iptmp);
+ iptmp = NULL;
+
+ if (!iplen2 || (iplen1 != iplen2))
+ goto err;
+
+ ret = ASN1_OCTET_STRING_new();
+ if (!ret)
+ goto err;
+ if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
+ goto err;
+
+ return ret;
+
+ err:
+ if (iptmp)
+ OPENSSL_free(iptmp);
+ if (ret)
+ ASN1_OCTET_STRING_free(ret);
+ return NULL;
+ }
+
+
+int a2i_ipadd(unsigned char *ipout, const char *ipasc)
+ {
+ /* If string contains a ':' assume IPv6 */
+
+ if (strchr(ipasc, ':'))
+ {
+ if (!ipv6_from_asc(ipout, ipasc))
+ return 0;
+ return 16;
+ }
+ else
+ {
+ if (!ipv4_from_asc(ipout, ipasc))
+ return 0;
+ return 4;
+ }
+ }
+
+static int ipv4_from_asc(unsigned char *v4, const char *in)
+ {
+ int a0, a1, a2, a3;
+ if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
+ return 0;
+ if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
+ || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
+ return 0;
+ v4[0] = a0;
+ v4[1] = a1;
+ v4[2] = a2;
+ v4[3] = a3;
+ return 1;
+ }
+
+typedef struct {
+ /* Temporary store for IPV6 output */
+ unsigned char tmp[16];
+ /* Total number of bytes in tmp */
+ int total;
+ /* The position of a zero (corresponding to '::') */
+ int zero_pos;
+ /* Number of zeroes */
+ int zero_cnt;
+ } IPV6_STAT;
+
+
+static int ipv6_from_asc(unsigned char *v6, const char *in)
+ {
+ IPV6_STAT v6stat;
+ v6stat.total = 0;
+ v6stat.zero_pos = -1;
+ v6stat.zero_cnt = 0;
+ /* Treat the IPv6 representation as a list of values
+ * separated by ':'. The presence of a '::' will parse
+ * as one, two or three zero length elements.
+ */
+ if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
+ return 0;
+
+ /* Now for some sanity checks */
+
+ if (v6stat.zero_pos == -1)
+ {
+ /* If no '::' must have exactly 16 bytes */
+ if (v6stat.total != 16)
+ return 0;
+ }
+ else
+ {
+ /* If '::' must have less than 16 bytes */
+ if (v6stat.total == 16)
+ return 0;
+ /* More than three zeroes is an error */
+ if (v6stat.zero_cnt > 3)
+ return 0;
+ /* Can only have three zeroes if nothing else present */
+ else if (v6stat.zero_cnt == 3)
+ {
+ if (v6stat.total > 0)
+ return 0;
+ }
+ /* Can only have two zeroes if at start or end */
+ else if (v6stat.zero_cnt == 2)
+ {
+ if ((v6stat.zero_pos != 0)
+ && (v6stat.zero_pos != v6stat.total))
+ return 0;
+ }
+ else
+ /* Can only have one zero if *not* start or end */
+ {
+ if ((v6stat.zero_pos == 0)
+ || (v6stat.zero_pos == v6stat.total))
+ return 0;
+ }
+ }
+
+ /* Format result */
+
+ /* Copy initial part */
+ if (v6stat.zero_pos > 0)
+ memcpy(v6, v6stat.tmp, v6stat.zero_pos);
+ /* Zero middle */
+ if (v6stat.total != 16)
+ memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
+ /* Copy final part */
+ if (v6stat.total != v6stat.zero_pos)
+ memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
+ v6stat.tmp + v6stat.zero_pos,
+ v6stat.total - v6stat.zero_pos);
+
+ return 1;
+ }
+
+static int ipv6_cb(const char *elem, int len, void *usr)
+ {
+ IPV6_STAT *s = usr;
+ /* Error if 16 bytes written */
+ if (s->total == 16)
+ return 0;
+ if (len == 0)
+ {
+ /* Zero length element, corresponds to '::' */
+ if (s->zero_pos == -1)
+ s->zero_pos = s->total;
+ /* If we've already got a :: its an error */
+ else if (s->zero_pos != s->total)
+ return 0;
+ s->zero_cnt++;
+ }
+ else
+ {
+ /* If more than 4 characters could be final a.b.c.d form */
+ if (len > 4)
+ {
+ /* Need at least 4 bytes left */
+ if (s->total > 12)
+ return 0;
+ /* Must be end of string */
+ if (elem[len])
+ return 0;
+ if (!ipv4_from_asc(s->tmp + s->total, elem))
+ return 0;
+ s->total += 4;
+ }
+ else
+ {
+ if (!ipv6_hex(s->tmp + s->total, elem, len))
+ return 0;
+ s->total += 2;
+ }
+ }
+ return 1;
+ }
+
+/* Convert a string of up to 4 hex digits into the corresponding
+ * IPv6 form.
+ */
+
+static int ipv6_hex(unsigned char *out, const char *in, int inlen)
+ {
+ unsigned char c;
+ unsigned int num = 0;
+ if (inlen > 4)
+ return 0;
+ while(inlen--)
+ {
+ c = *in++;
+ num <<= 4;
+ if ((c >= '0') && (c <= '9'))
+ num |= c - '0';
+ else if ((c >= 'A') && (c <= 'F'))
+ num |= c - 'A' + 10;
+ else if ((c >= 'a') && (c <= 'f'))
+ num |= c - 'a' + 10;
+ else
+ return 0;
+ }
+ out[0] = num >> 8;
+ out[1] = num & 0xff;
+ return 1;
+ }
+
+
+int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE)*dn_sk,
+ unsigned long chtype)
+ {
+ CONF_VALUE *v;
+ int i, mval;
+ char *p, *type;
+ if (!nm)
+ return 0;
+
+ for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++)
+ {
+ v=sk_CONF_VALUE_value(dn_sk,i);
+ type=v->name;
+ /* Skip past any leading X. X: X, etc to allow for
+ * multiple instances
+ */
+ for(p = type; *p ; p++)
+#ifndef CHARSET_EBCDIC
+ if ((*p == ':') || (*p == ',') || (*p == '.'))
+#else
+ if ((*p == os_toascii[':']) || (*p == os_toascii[',']) || (*p == os_toascii['.']))
+#endif
+ {
+ p++;
+ if(*p) type = p;
+ break;
+ }
+#ifndef CHARSET_EBCDIC
+ if (*type == '+')
+#else
+ if (*type == os_toascii['+'])
+#endif
+ {
+ mval = -1;
+ type++;
+ }
+ else
+ mval = 0;
+ if (!X509_NAME_add_entry_by_txt(nm,type, chtype,
+ (unsigned char *) v->value,-1,-1,mval))
+ return 0;
+
+ }
+ return 1;
+ }
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