/* v3_utl.c */
-/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 1999.
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * 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 <stdio.h>
#include <ctype.h>
#include "cryptlib.h"
-#include "conf.h"
-#include "x509v3.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 STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens);
+static void str_free(OPENSSL_STRING str);
+static int append_ia5(STACK_OF(OPENSSL_STRING) **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(name, value, extlist)
-char *name;
-char *value;
-STACK **extlist;
+int X509V3_add_value(const char *name, const char *value,
+ STACK_OF(CONF_VALUE) **extlist)
{
CONF_VALUE *vtmp = NULL;
char *tname = NULL, *tvalue = NULL;
if(name && !(tname = BUF_strdup(name))) goto err;
- if(value && !(tvalue = BUF_strdup(value))) goto err;;
- if(!(vtmp = (CONF_VALUE *)Malloc(sizeof(CONF_VALUE)))) goto err;
- if(!*extlist && !(*extlist = sk_new(NULL))) goto err;
+ if(value && !(tvalue = BUF_strdup(value))) goto err;
+ if(!(vtmp = (CONF_VALUE *)OPENSSL_malloc(sizeof(CONF_VALUE)))) goto err;
+ if(!*extlist && !(*extlist = sk_CONF_VALUE_new_null())) goto err;
vtmp->section = NULL;
vtmp->name = tname;
vtmp->value = tvalue;
- if(!sk_push(*extlist, (char *)vtmp)) goto err;
+ if(!sk_CONF_VALUE_push(*extlist, vtmp)) goto err;
return 1;
err:
X509V3err(X509V3_F_X509V3_ADD_VALUE,ERR_R_MALLOC_FAILURE);
- if(vtmp) Free(vtmp);
- if(tname) Free(tname);
- if(tvalue) Free(tvalue);
+ if(vtmp) OPENSSL_free(vtmp);
+ if(tname) OPENSSL_free(tname);
+ if(tvalue) OPENSSL_free(tvalue);
return 0;
}
-/* Free function for STACK of CONF_VALUE */
+int X509V3_add_value_uchar(const char *name, const unsigned char *value,
+ STACK_OF(CONF_VALUE) **extlist)
+ {
+ return X509V3_add_value(name,(const char *)value,extlist);
+ }
+
+/* Free function for STACK_OF(CONF_VALUE) */
-void X509V3_conf_free(conf)
-CONF_VALUE *conf;
+void X509V3_conf_free(CONF_VALUE *conf)
{
if(!conf) return;
- if(conf->name) Free(conf->name);
- if(conf->value) Free(conf->value);
- if(conf->section) Free(conf->section);
- Free((char *)conf);
+ if(conf->name) OPENSSL_free(conf->name);
+ if(conf->value) OPENSSL_free(conf->value);
+ if(conf->section) OPENSSL_free(conf->section);
+ OPENSSL_free(conf);
}
-int X509V3_add_value_bool(name, asn1_bool, extlist)
-char *name;
-int asn1_bool;
-STACK **extlist;
+int X509V3_add_value_bool(const char *name, int asn1_bool,
+ STACK_OF(CONF_VALUE) **extlist)
{
if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
return X509V3_add_value(name, "FALSE", extlist);
}
-int X509V3_add_value_bool_nf(name, asn1_bool, extlist)
-char *name;
-int asn1_bool;
-STACK **extlist;
+int X509V3_add_value_bool_nf(char *name, int asn1_bool,
+ STACK_OF(CONF_VALUE) **extlist)
{
if(asn1_bool) return X509V3_add_value(name, "TRUE", extlist);
return 1;
}
-char *i2s_ASN1_ENUMERATED(method, a)
-X509V3_EXT_METHOD *method;
-ASN1_ENUMERATED *a;
+char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a)
{
BIGNUM *bntmp = NULL;
char *strtmp = NULL;
return strtmp;
}
-char *i2s_ASN1_INTEGER(method, a)
-X509V3_EXT_METHOD *method;
-ASN1_INTEGER *a;
+char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a)
{
BIGNUM *bntmp = NULL;
char *strtmp = NULL;
return strtmp;
}
-ASN1_INTEGER *s2i_ASN1_INTEGER(method, value)
-X509V3_EXT_METHOD *method;
-char *value;
+ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value)
{
BIGNUM *bn = NULL;
ASN1_INTEGER *aint;
- bn = BN_new();
- if(!value) {
+ int isneg, ishex;
+ int ret;
+ if (!value) {
X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_INVALID_NULL_VALUE);
return 0;
}
- if(!BN_dec2bn(&bn, value)) {
+ bn = BN_new();
+ if (value[0] == '-') {
+ value++;
+ isneg = 1;
+ } else isneg = 0;
+
+ if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
+ value += 2;
+ ishex = 1;
+ } else ishex = 0;
+
+ if (ishex) ret = BN_hex2bn(&bn, value);
+ else ret = BN_dec2bn(&bn, value);
+
+ if (!ret || value[ret]) {
+ BN_free(bn);
X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_DEC2BN_ERROR);
return 0;
}
- if(!(aint = BN_to_ASN1_INTEGER(bn, NULL))) {
+ if (isneg && BN_is_zero(bn)) isneg = 0;
+
+ aint = BN_to_ASN1_INTEGER(bn, NULL);
+ BN_free(bn);
+ if (!aint) {
X509V3err(X509V3_F_S2I_ASN1_INTEGER,X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
return 0;
}
- BN_free(bn);
+ if (isneg) aint->type |= V_ASN1_NEG;
return aint;
}
-int X509V3_add_value_int(name, aint, extlist)
-char *name;
-ASN1_INTEGER *aint;
-STACK **extlist;
+int X509V3_add_value_int(const char *name, ASN1_INTEGER *aint,
+ STACK_OF(CONF_VALUE) **extlist)
{
char *strtmp;
int ret;
if(!aint) return 1;
if(!(strtmp = i2s_ASN1_INTEGER(NULL, aint))) return 0;
ret = X509V3_add_value(name, strtmp, extlist);
- Free(strtmp);
+ OPENSSL_free(strtmp);
return ret;
}
-int X509V3_get_value_bool(value, asn1_bool)
-CONF_VALUE *value;
-int *asn1_bool;
+int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool)
{
char *btmp;
if(!(btmp = value->value)) goto err;
return 0;
}
-int X509V3_get_value_int(value, aint)
-CONF_VALUE *value;
-ASN1_INTEGER **aint;
+int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint)
{
ASN1_INTEGER *itmp;
if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) {
/*#define DEBUG*/
-STACK *X509V3_parse_list(line)
-char *line;
+STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
{
char *p, *q, c;
char *ntmp, *vtmp;
- STACK *values = NULL;
+ STACK_OF(CONF_VALUE) *values = NULL;
char *linebuf;
int state;
/* We are going to modify the line so copy it first */
*p = 0;
ntmp = strip_spaces(q);
q = p + 1;
-#ifdef DEBUG
+#if 0
printf("%s\n", ntmp);
#endif
if(!ntmp) {
state = HDR_NAME;
*p = 0;
vtmp = strip_spaces(q);
-#ifdef DEBUG
+#if 0
printf("%s\n", ntmp);
#endif
if(!vtmp) {
if(state == HDR_VALUE) {
vtmp = strip_spaces(q);
-#ifdef DEBUG
+#if 0
printf("%s=%s\n", ntmp, vtmp);
#endif
if(!vtmp) {
X509V3_add_value(ntmp, vtmp, &values);
} else {
ntmp = strip_spaces(q);
-#ifdef DEBUG
+#if 0
printf("%s\n", ntmp);
#endif
if(!ntmp) {
}
X509V3_add_value(ntmp, NULL, &values);
}
-Free(linebuf);
+OPENSSL_free(linebuf);
return values;
err:
-Free(linebuf);
-sk_pop_free(values, X509V3_conf_free);
+OPENSSL_free(linebuf);
+sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
return NULL;
}
/* Delete leading and trailing spaces from a string */
-static char *strip_spaces(name)
-char *name;
+static char *strip_spaces(char *name)
{
char *p, *q;
/* Skip over leading spaces */
p = name;
- while(*p && isspace(*p)) p++;
+ while(*p && isspace((unsigned char)*p)) p++;
if(!*p) return NULL;
q = p + strlen(p) - 1;
- while((q != p) && isspace(*q)) q--;
+ while((q != p) && isspace((unsigned char)*q)) q--;
if(p != q) q[1] = 0;
if(!*p) return NULL;
return p;
/* hex string utilities */
-/* Given a buffer of length 'len' return a Malloc'ed string with its
+/* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
* hex representation
+ * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
*/
-char *hex_to_string(buffer, len)
-unsigned char *buffer;
-long len;
+char *hex_to_string(const unsigned char *buffer, long len)
{
char *tmp, *q;
- unsigned char *p;
+ const unsigned char *p;
int i;
- static char hexdig[] = "0123456789ABCDEF";
+ const static char hexdig[] = "0123456789ABCDEF";
if(!buffer || !len) return NULL;
- if(!(tmp = Malloc(len * 3 + 1))) {
+ if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
return NULL;
}
*q++ = ':';
}
q[-1] = 0;
+#ifdef CHARSET_EBCDIC
+ ebcdic2ascii(tmp, tmp, q - tmp - 1);
+#endif
+
return tmp;
}
* a buffer
*/
-unsigned char *string_to_hex(str, len)
-char *str;
-long *len;
+unsigned char *string_to_hex(const char *str, long *len)
{
unsigned char *hexbuf, *q;
unsigned char ch, cl, *p;
X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
return NULL;
}
- if(!(hexbuf = Malloc(strlen(str) >> 1))) goto err;
+ if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
for(p = (unsigned char *)str, q = hexbuf; *p;) {
ch = *p++;
+#ifdef CHARSET_EBCDIC
+ ch = os_toebcdic[ch];
+#endif
if(ch == ':') continue;
cl = *p++;
+#ifdef CHARSET_EBCDIC
+ cl = os_toebcdic[cl];
+#endif
if(!cl) {
X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
- Free(hexbuf);
+ OPENSSL_free(hexbuf);
return NULL;
}
if(isupper(ch)) ch = tolower(ch);
return hexbuf;
err:
- if(hexbuf) Free(hexbuf);
+ if(hexbuf) OPENSSL_free(hexbuf);
X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
return NULL;
badhex:
- Free(hexbuf);
+ OPENSSL_free(hexbuf);
X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
return NULL;
* cmp or cmp.*
*/
-int name_cmp(name, cmp)
-char *name;
-char *cmp;
+int name_cmp(const char *name, const char *cmp)
{
int len, ret;
char c;
if(!c || (c=='.')) return 0;
return 1;
}
+
+static int sk_strcmp(const char * const *a, const char * const *b)
+{
+ return strcmp(*a, *b);
+}
+
+STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
+{
+ GENERAL_NAMES *gens;
+ STACK_OF(OPENSSL_STRING) *ret;
+
+ gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
+ ret = get_email(X509_get_subject_name(x), gens);
+ sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
+ return ret;
+}
+
+STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
+{
+ AUTHORITY_INFO_ACCESS *info;
+ STACK_OF(OPENSSL_STRING) *ret = NULL;
+ int i;
+
+ info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
+ if (!info)
+ return NULL;
+ for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++)
+ {
+ ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
+ if (OBJ_obj2nid(ad->method) == NID_ad_OCSP)
+ {
+ if (ad->location->type == GEN_URI)
+ {
+ if (!append_ia5(&ret, ad->location->d.uniformResourceIdentifier))
+ break;
+ }
+ }
+ }
+ AUTHORITY_INFO_ACCESS_free(info);
+ return ret;
+}
+
+STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
+{
+ GENERAL_NAMES *gens;
+ STACK_OF(X509_EXTENSION) *exts;
+ STACK_OF(OPENSSL_STRING) *ret;
+
+ exts = X509_REQ_get_extensions(x);
+ gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
+ ret = get_email(X509_REQ_get_subject_name(x), gens);
+ sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
+ sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
+ return ret;
+}
+
+
+static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name, GENERAL_NAMES *gens)
+{
+ STACK_OF(OPENSSL_STRING) *ret = NULL;
+ X509_NAME_ENTRY *ne;
+ ASN1_IA5STRING *email;
+ GENERAL_NAME *gen;
+ int i;
+ /* Now add any email address(es) to STACK */
+ i = -1;
+ /* First supplied X509_NAME */
+ while((i = X509_NAME_get_index_by_NID(name,
+ NID_pkcs9_emailAddress, i)) >= 0) {
+ ne = X509_NAME_get_entry(name, i);
+ email = X509_NAME_ENTRY_get_data(ne);
+ if(!append_ia5(&ret, email)) return NULL;
+ }
+ for(i = 0; i < sk_GENERAL_NAME_num(gens); i++)
+ {
+ gen = sk_GENERAL_NAME_value(gens, i);
+ if(gen->type != GEN_EMAIL) continue;
+ if(!append_ia5(&ret, gen->d.ia5)) return NULL;
+ }
+ return ret;
+}
+
+static void str_free(OPENSSL_STRING str)
+{
+ OPENSSL_free(str);
+}
+
+static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, ASN1_IA5STRING *email)
+{
+ char *emtmp;
+ /* First some sanity checks */
+ if(email->type != V_ASN1_IA5STRING) return 1;
+ if(!email->data || !email->length) return 1;
+ if(!*sk) *sk = sk_OPENSSL_STRING_new(sk_strcmp);
+ if(!*sk) return 0;
+ /* Don't add duplicates */
+ if(sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1) return 1;
+ emtmp = BUF_strdup((char *)email->data);
+ if(!emtmp || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
+ X509_email_free(*sk);
+ *sk = NULL;
+ return 0;
+ }
+ return 1;
+}
+
+void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
+{
+ sk_OPENSSL_STRING_pop_free(sk, str_free);
+}
+
+typedef int (*equal_fn)(const unsigned char *pattern, size_t pattern_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags);
+
+/* Skip pattern prefix to match "wildcard" subject */
+static void skip_prefix(const unsigned char **p, size_t *plen,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags)
+ {
+ const unsigned char *pattern = *p;
+ size_t pattern_len = *plen;
+
+ /*
+ * If subject starts with a leading '.' followed by more octets, and
+ * pattern is longer, compare just an equal-length suffix with the
+ * full subject (starting at the '.'), provided the prefix contains
+ * no NULs.
+ */
+ if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
+ return;
+
+ while (pattern_len > subject_len && *pattern)
+ {
+ if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
+ *pattern == '.')
+ break;
+ ++pattern;
+ --pattern_len;
+ }
+
+ /* Skip if entire prefix acceptable */
+ if (pattern_len == subject_len)
+ {
+ *p = pattern;
+ *plen = pattern_len;
+ }
+ }
+
+/* Compare while ASCII ignoring case. */
+static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags)
+ {
+ skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
+ if (pattern_len != subject_len)
+ return 0;
+ while (pattern_len)
+ {
+ unsigned char l = *pattern;
+ unsigned char r = *subject;
+ /* The pattern must not contain NUL characters. */
+ if (l == 0)
+ return 0;
+ if (l != r)
+ {
+ if ('A' <= l && l <= 'Z')
+ l = (l - 'A') + 'a';
+ if ('A' <= r && r <= 'Z')
+ r = (r - 'A') + 'a';
+ if (l != r)
+ return 0;
+ }
+ ++pattern;
+ ++subject;
+ --pattern_len;
+ }
+ return 1;
+ }
+
+/* Compare using memcmp. */
+static int equal_case(const unsigned char *pattern, size_t pattern_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags)
+{
+ skip_prefix(&pattern, &pattern_len, subject, subject_len, flags);
+ if (pattern_len != subject_len)
+ return 0;
+ return !memcmp(pattern, subject, pattern_len);
+}
+
+/* RFC 5280, section 7.5, requires that only the domain is compared in
+ a case-insensitive manner. */
+static int equal_email(const unsigned char *a, size_t a_len,
+ const unsigned char *b, size_t b_len,
+ unsigned int unused_flags)
+ {
+ size_t i = a_len;
+ if (a_len != b_len)
+ return 0;
+ /* We search backwards for the '@' character, so that we do
+ not have to deal with quoted local-parts. The domain part
+ is compared in a case-insensitive manner. */
+ while (i > 0)
+ {
+ --i;
+ if (a[i] == '@' || b[i] == '@')
+ {
+ if (!equal_nocase(a + i, a_len - i,
+ b + i, a_len - i, 0))
+ return 0;
+ break;
+ }
+ }
+ if (i == 0)
+ i = a_len;
+ return equal_case(a, i, b, i, 0);
+ }
+
+/* Compare the prefix and suffix with the subject, and check that the
+ characters in-between are valid. */
+static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
+ const unsigned char *suffix, size_t suffix_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags)
+ {
+ const unsigned char *wildcard_start;
+ const unsigned char *wildcard_end;
+ const unsigned char *p;
+ int allow_multi = 0;
+ int allow_idna = 0;
+
+ if (subject_len < prefix_len + suffix_len)
+ return 0;
+ if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
+ return 0;
+ wildcard_start = subject + prefix_len;
+ wildcard_end = subject + (subject_len - suffix_len);
+ if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
+ return 0;
+ /*
+ * If the wildcard makes up the entire first label, it must match at
+ * least one character.
+ */
+ if (prefix_len == 0 && *suffix == '.')
+ {
+ if (wildcard_start == wildcard_end)
+ return 0;
+ allow_idna = 1;
+ if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
+ allow_multi = 1;
+ }
+ /* IDNA labels cannot match partial wildcards */
+ if (!allow_idna &&
+ subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
+ return 0;
+ /* The wildcard may match a literal '*' */
+ if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
+ return 1;
+ /*
+ * Check that the part matched by the wildcard contains only
+ * permitted characters and only matches a single label unless
+ * allow_multi is set.
+ */
+ for (p = wildcard_start; p != wildcard_end; ++p)
+ if (!(('0' <= *p && *p <= '9') ||
+ ('A' <= *p && *p <= 'Z') ||
+ ('a' <= *p && *p <= 'z') ||
+ *p == '-' || (allow_multi && *p == '.')))
+ return 0;
+ return 1;
+ }
+
+#define LABEL_START (1 << 0)
+#define LABEL_END (1 << 1)
+#define LABEL_HYPHEN (1 << 2)
+#define LABEL_IDNA (1 << 3)
+
+static const unsigned char *valid_star(const unsigned char *p, size_t len,
+ unsigned int flags)
+ {
+ const unsigned char *star = 0;
+ size_t i;
+ int state = LABEL_START;
+ int dots = 0;
+ for (i = 0; i < len; ++i)
+ {
+ /*
+ * Locate first and only legal wildcard, either at the start
+ * or end of a non-IDNA first and not final label.
+ */
+ if (p[i] == '*')
+ {
+ int atstart = (state & LABEL_START);
+ int atend = (i == len - 1 || p[i+i] == '.');
+ /*
+ * At most one wildcard per pattern.
+ * No wildcards in IDNA labels.
+ * No wildcards after the first label.
+ */
+ if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
+ return NULL;
+ /* Only full-label '*.example.com' wildcards? */
+ if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
+ && (!atstart || !atend))
+ return NULL;
+ /* No 'foo*bar' wildcards */
+ if (!atstart && !atend)
+ return NULL;
+ star = &p[i];
+ state &= ~LABEL_START;
+ }
+ else if ((state & LABEL_START) != 0)
+ {
+ /*
+ * At the start of a label, skip any "xn--" and
+ * remain in the LABEL_START state, but set the
+ * IDNA label state
+ */
+ if ((state & LABEL_IDNA) == 0 && len - i >= 4
+ && strncasecmp((char *)&p[i], "xn--", 4) == 0)
+ {
+ i += 3;
+ state |= LABEL_IDNA;
+ continue;
+ }
+ /* Labels must start with a letter or digit */
+ state &= ~LABEL_START;
+ if (('a' <= p[i] && p[i] <= 'z')
+ || ('A' <= p[i] && p[i] <= 'Z')
+ || ('0' <= p[i] && p[i] <= '9'))
+ continue;
+ return NULL;
+ }
+ else if (('a' <= p[i] && p[i] <= 'z')
+ || ('A' <= p[i] && p[i] <= 'Z')
+ || ('0' <= p[i] && p[i] <= '9'))
+ {
+ state &= LABEL_IDNA;
+ continue;
+ }
+ else if (p[i] == '.')
+ {
+ if (state & (LABEL_HYPHEN | LABEL_START))
+ return NULL;
+ state = LABEL_START;
+ ++dots;
+ }
+ else if (p[i] == '-')
+ {
+ if (state & LABEL_HYPHEN)
+ return NULL;
+ state |= LABEL_HYPHEN;
+ }
+ else
+ return NULL;
+ }
+
+ /*
+ * The final label must not end in a hyphen or ".", and
+ * there must be at least two dots after the star.
+ */
+ if ((state & (LABEL_START | LABEL_HYPHEN)) != 0
+ || dots < 2)
+ return NULL;
+ return star;
+ }
+
+/* Compare using wildcards. */
+static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
+ const unsigned char *subject, size_t subject_len,
+ unsigned int flags)
+ {
+ const unsigned char *star = NULL;
+
+ /*
+ * Subject names starting with '.' can only match a wildcard pattern
+ * via a subject sub-domain pattern suffix match.
+ */
+ if (!(subject_len > 1 && subject[0] == '.'))
+ star = valid_star(pattern, pattern_len, flags);
+ if (star == NULL)
+ return equal_nocase(pattern, pattern_len,
+ subject, subject_len, flags);
+ return wildcard_match(pattern, star - pattern,
+ star + 1, (pattern + pattern_len) - star - 1,
+ subject, subject_len, flags);
+ }
+
+/* Compare an ASN1_STRING to a supplied string. If they match
+ * return 1. If cmp_type > 0 only compare if string matches the
+ * type, otherwise convert it to UTF8.
+ */
+
+static int do_check_string(ASN1_STRING *a, int cmp_type, equal_fn equal,
+ unsigned int flags,
+ const unsigned char *b, size_t blen)
+ {
+ if (!a->data || !a->length)
+ return 0;
+ if (cmp_type > 0)
+ {
+ if (cmp_type != a->type)
+ return 0;
+ if (cmp_type == V_ASN1_IA5STRING)
+ return equal(a->data, a->length, b, blen, flags);
+ if (a->length == (int)blen && !memcmp(a->data, b, blen))
+ return 1;
+ else
+ return 0;
+ }
+ else
+ {
+ int astrlen, rv;
+ unsigned char *astr;
+ astrlen = ASN1_STRING_to_UTF8(&astr, a);
+ if (astrlen < 0)
+ return -1;
+ rv = equal(astr, astrlen, b, blen, flags);
+ OPENSSL_free(astr);
+ return rv;
+ }
+ }
+
+static int do_x509_check(X509 *x, const unsigned char *chk, size_t chklen,
+ unsigned int flags, int check_type)
+ {
+ GENERAL_NAMES *gens = NULL;
+ X509_NAME *name = NULL;
+ int i;
+ int cnid;
+ int alt_type;
+ int san_present = 0;
+ equal_fn equal;
+
+ /* See below, this flag is internal-only */
+ flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
+ if (check_type == GEN_EMAIL)
+ {
+ cnid = NID_pkcs9_emailAddress;
+ alt_type = V_ASN1_IA5STRING;
+ equal = equal_email;
+ }
+ else if (check_type == GEN_DNS)
+ {
+ cnid = NID_commonName;
+ /* Implicit client-side DNS sub-domain pattern */
+ if (chklen > 1 && chk[0] == '.')
+ flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
+ alt_type = V_ASN1_IA5STRING;
+ if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
+ equal = equal_nocase;
+ else
+ equal = equal_wildcard;
+ }
+ else
+ {
+ cnid = 0;
+ alt_type = V_ASN1_OCTET_STRING;
+ equal = equal_case;
+ }
+
+ if (chklen == 0)
+ chklen = strlen((const char *)chk);
+
+ gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
+ if (gens)
+ {
+ int rv = 0;
+ for (i = 0; i < sk_GENERAL_NAME_num(gens); i++)
+ {
+ GENERAL_NAME *gen;
+ ASN1_STRING *cstr;
+ gen = sk_GENERAL_NAME_value(gens, i);
+ if (gen->type != check_type)
+ continue;
+ san_present = 1;
+ if (check_type == GEN_EMAIL)
+ cstr = gen->d.rfc822Name;
+ else if (check_type == GEN_DNS)
+ cstr = gen->d.dNSName;
+ else
+ cstr = gen->d.iPAddress;
+ if (do_check_string(cstr, alt_type, equal, flags,
+ chk, chklen))
+ {
+ rv = 1;
+ break;
+ }
+ }
+ GENERAL_NAMES_free(gens);
+ if (rv)
+ return 1;
+ if (!cnid
+ || (san_present
+ && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT)))
+ return 0;
+ }
+ i = -1;
+ name = X509_get_subject_name(x);
+ while((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0)
+ {
+ X509_NAME_ENTRY *ne;
+ ASN1_STRING *str;
+ ne = X509_NAME_get_entry(name, i);
+ str = X509_NAME_ENTRY_get_data(ne);
+ if (do_check_string(str, -1, equal, flags, chk, chklen))
+ return 1;
+ }
+ return 0;
+ }
+
+int X509_check_host(X509 *x, const unsigned char *chk, size_t chklen,
+ unsigned int flags)
+ {
+ if (chk == NULL)
+ return -2;
+ /*
+ * Embedded NULs are disallowed, except as the last character of a
+ * string of length 2 or more (tolerate caller including terminating
+ * NUL in string length).
+ */
+ if (chklen == 0)
+ chklen = strlen((char *)chk);
+ else if (memchr(chk, '\0', chklen > 1 ? chklen-1 : chklen))
+ return -2;
+ if (chklen > 1 && chk[chklen-1] == '\0')
+ --chklen;
+ return do_x509_check(x, chk, chklen, flags, GEN_DNS);
+ }
+
+int X509_check_email(X509 *x, const unsigned char *chk, size_t chklen,
+ unsigned int flags)
+ {
+ if (chk == NULL)
+ return -2;
+ /*
+ * Embedded NULs are disallowed, except as the last character of a
+ * string of length 2 or more (tolerate caller including terminating
+ * NUL in string length).
+ */
+ if (chklen == 0)
+ chklen = strlen((char *)chk);
+ else if (memchr(chk, '\0', chklen > 1 ? chklen-1 : chklen))
+ return -2;
+ if (chklen > 1 && chk[chklen-1] == '\0')
+ --chklen;
+ return do_x509_check(x, chk, chklen, flags, GEN_EMAIL);
+ }
+
+int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
+ unsigned int flags)
+ {
+ if (chk == NULL)
+ return -2;
+ return do_x509_check(x, chk, chklen, flags, GEN_IPADD);
+ }
+
+int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
+ {
+ unsigned char ipout[16];
+ int iplen;
+ if (ipasc == NULL)
+ return -2;
+ iplen = a2i_ipadd(ipout, ipasc);
+ if (iplen == 0)
+ return -2;
+ return do_x509_check(x, ipout, (size_t)iplen, flags, GEN_IPADD);
+ }
+
+/* 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 */
+
+ if (v6stat.zero_pos >= 0)
+ {
+ /* Copy initial part */
+ memcpy(v6, v6stat.tmp, v6stat.zero_pos);
+ /* Zero middle */
+ 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);
+ }
+ else
+ memcpy(v6, v6stat.tmp, 16);
+
+ 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;
+ }
projects / openssl.git / blobdiff