| /* v3_utl.c */ |
| /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| * project. |
| */ |
| /* ==================================================================== |
| * 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 |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| * |
| * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * licensing@OpenSSL.org. |
| * |
| * 5. Products derived from this software may not be called "OpenSSL" |
| * nor may "OpenSSL" appear in their names without prior written |
| * permission of the OpenSSL Project. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This product includes cryptographic software written by Eric Young |
| * (eay@cryptsoft.com). This product includes software written by Tim |
| * Hudson (tjh@cryptsoft.com). |
| * |
| */ |
| /* X509 v3 extension utilities */ |
| |
| |
| #include <ctype.h> |
| #include <stdio.h> |
| |
| #include <openssl/bn.h> |
| #include <openssl/buf.h> |
| #include <openssl/conf.h> |
| #include <openssl/err.h> |
| #include <openssl/mem.h> |
| #include <openssl/obj.h> |
| #include <openssl/x509v3.h> |
| |
| |
| static char *strip_spaces(char *name); |
| static int sk_strcmp(const OPENSSL_STRING *a, const OPENSSL_STRING *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(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 *)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_CONF_VALUE_push(*extlist, vtmp)) goto err; |
| return 1; |
| err: |
| OPENSSL_PUT_ERROR(X509V3, X509V3_add_value, ERR_R_MALLOC_FAILURE); |
| if(vtmp) OPENSSL_free(vtmp); |
| if(tname) OPENSSL_free(tname); |
| if(tvalue) OPENSSL_free(tvalue); |
| return 0; |
| } |
| |
| 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_VALUE *conf) |
| { |
| if(!conf) return; |
| 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(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(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(X509V3_EXT_METHOD *method, ASN1_ENUMERATED *a) |
| { |
| BIGNUM *bntmp = NULL; |
| char *strtmp = NULL; |
| if(!a) return NULL; |
| if(!(bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) || |
| !(strtmp = BN_bn2dec(bntmp)) ) |
| OPENSSL_PUT_ERROR(X509V3, i2s_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE); |
| BN_free(bntmp); |
| return strtmp; |
| } |
| |
| char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, ASN1_INTEGER *a) |
| { |
| BIGNUM *bntmp = NULL; |
| char *strtmp = NULL; |
| if(!a) return NULL; |
| if(!(bntmp = ASN1_INTEGER_to_BN(a, NULL)) || |
| !(strtmp = BN_bn2dec(bntmp)) ) |
| OPENSSL_PUT_ERROR(X509V3, i2s_ASN1_INTEGER, ERR_R_MALLOC_FAILURE); |
| BN_free(bntmp); |
| return strtmp; |
| } |
| |
| ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, char *value) |
| { |
| BIGNUM *bn = NULL; |
| ASN1_INTEGER *aint; |
| int isneg, ishex; |
| int ret; |
| if (!value) { |
| OPENSSL_PUT_ERROR(X509V3, s2i_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE); |
| return 0; |
| } |
| 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); |
| OPENSSL_PUT_ERROR(X509V3, s2i_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR); |
| return 0; |
| } |
| |
| if (isneg && BN_is_zero(bn)) isneg = 0; |
| |
| aint = BN_to_ASN1_INTEGER(bn, NULL); |
| BN_free(bn); |
| if (!aint) { |
| OPENSSL_PUT_ERROR(X509V3, s2i_ASN1_INTEGER, X509V3_R_BN_TO_ASN1_INTEGER_ERROR); |
| return 0; |
| } |
| if (isneg) aint->type |= V_ASN1_NEG; |
| return aint; |
| } |
| |
| 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); |
| OPENSSL_free(strtmp); |
| return ret; |
| } |
| |
| int X509V3_get_value_bool(CONF_VALUE *value, int *asn1_bool) |
| { |
| char *btmp; |
| if(!(btmp = value->value)) goto err; |
| if(!strcmp(btmp, "TRUE") || !strcmp(btmp, "true") |
| || !strcmp(btmp, "Y") || !strcmp(btmp, "y") |
| || !strcmp(btmp, "YES") || !strcmp(btmp, "yes")) { |
| *asn1_bool = 0xff; |
| return 1; |
| } else if(!strcmp(btmp, "FALSE") || !strcmp(btmp, "false") |
| || !strcmp(btmp, "N") || !strcmp(btmp, "n") |
| || !strcmp(btmp, "NO") || !strcmp(btmp, "no")) { |
| *asn1_bool = 0; |
| return 1; |
| } |
| err: |
| OPENSSL_PUT_ERROR(X509V3, X509V3_get_value_bool, X509V3_R_INVALID_BOOLEAN_STRING); |
| X509V3_conf_err(value); |
| return 0; |
| } |
| |
| int X509V3_get_value_int(CONF_VALUE *value, ASN1_INTEGER **aint) |
| { |
| ASN1_INTEGER *itmp; |
| if(!(itmp = s2i_ASN1_INTEGER(NULL, value->value))) { |
| X509V3_conf_err(value); |
| return 0; |
| } |
| *aint = itmp; |
| return 1; |
| } |
| |
| #define HDR_NAME 1 |
| #define HDR_VALUE 2 |
| |
| /*#define DEBUG*/ |
| |
| STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line) |
| { |
| char *p, *q, c; |
| char *ntmp, *vtmp; |
| STACK_OF(CONF_VALUE) *values = NULL; |
| char *linebuf; |
| int state; |
| /* We are going to modify the line so copy it first */ |
| linebuf = BUF_strdup(line); |
| state = HDR_NAME; |
| ntmp = NULL; |
| /* Go through all characters */ |
| for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) { |
| |
| switch(state) { |
| case HDR_NAME: |
| if(c == ':') { |
| state = HDR_VALUE; |
| *p = 0; |
| ntmp = strip_spaces(q); |
| if(!ntmp) { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_parse_list, X509V3_R_INVALID_NULL_NAME); |
| goto err; |
| } |
| q = p + 1; |
| } else if(c == ',') { |
| *p = 0; |
| ntmp = strip_spaces(q); |
| q = p + 1; |
| #if 0 |
| printf("%s\n", ntmp); |
| #endif |
| if(!ntmp) { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_parse_list, X509V3_R_INVALID_NULL_NAME); |
| goto err; |
| } |
| X509V3_add_value(ntmp, NULL, &values); |
| } |
| break ; |
| |
| case HDR_VALUE: |
| if(c == ',') { |
| state = HDR_NAME; |
| *p = 0; |
| vtmp = strip_spaces(q); |
| #if 0 |
| printf("%s\n", ntmp); |
| #endif |
| if(!vtmp) { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_parse_list, X509V3_R_INVALID_NULL_VALUE); |
| goto err; |
| } |
| X509V3_add_value(ntmp, vtmp, &values); |
| ntmp = NULL; |
| q = p + 1; |
| } |
| |
| } |
| } |
| |
| if(state == HDR_VALUE) { |
| vtmp = strip_spaces(q); |
| #if 0 |
| printf("%s=%s\n", ntmp, vtmp); |
| #endif |
| if(!vtmp) { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_parse_list, X509V3_R_INVALID_NULL_VALUE); |
| goto err; |
| } |
| X509V3_add_value(ntmp, vtmp, &values); |
| } else { |
| ntmp = strip_spaces(q); |
| #if 0 |
| printf("%s\n", ntmp); |
| #endif |
| if(!ntmp) { |
| OPENSSL_PUT_ERROR(X509V3, X509V3_parse_list, X509V3_R_INVALID_NULL_NAME); |
| goto err; |
| } |
| X509V3_add_value(ntmp, NULL, &values); |
| } |
| OPENSSL_free(linebuf); |
| return values; |
| |
| err: |
| 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(char *name) |
| { |
| char *p, *q; |
| /* Skip over leading spaces */ |
| p = name; |
| while(*p && isspace((unsigned char)*p)) p++; |
| if(!*p) return NULL; |
| q = p + strlen(p) - 1; |
| 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 OPENSSL_malloc'ed string with its |
| * hex representation |
| * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines) |
| */ |
| |
| char *hex_to_string(const unsigned char *buffer, long len) |
| { |
| char *tmp, *q; |
| const unsigned char *p; |
| int i; |
| const static char hexdig[] = "0123456789ABCDEF"; |
| if(!buffer || !len) return NULL; |
| if(!(tmp = OPENSSL_malloc(len * 3 + 1))) { |
| OPENSSL_PUT_ERROR(X509V3, hex_to_string, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| } |
| q = tmp; |
| for(i = 0, p = buffer; i < len; i++,p++) { |
| *q++ = hexdig[(*p >> 4) & 0xf]; |
| *q++ = hexdig[*p & 0xf]; |
| *q++ = ':'; |
| } |
| q[-1] = 0; |
| |
| return tmp; |
| } |
| |
| /* Give a string of hex digits convert to |
| * a buffer |
| */ |
| |
| unsigned char *string_to_hex(const char *str, long *len) |
| { |
| unsigned char *hexbuf, *q; |
| unsigned char ch, cl, *p; |
| if(!str) { |
| OPENSSL_PUT_ERROR(X509V3, string_to_hex, X509V3_R_INVALID_NULL_ARGUMENT); |
| return NULL; |
| } |
| if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err; |
| for(p = (unsigned char *)str, q = hexbuf; *p;) { |
| ch = *p++; |
| if(ch == ':') continue; |
| cl = *p++; |
| if(!cl) { |
| OPENSSL_PUT_ERROR(X509V3, string_to_hex, X509V3_R_ODD_NUMBER_OF_DIGITS); |
| OPENSSL_free(hexbuf); |
| return NULL; |
| } |
| if(isupper(ch)) ch = tolower(ch); |
| if(isupper(cl)) cl = tolower(cl); |
| |
| if((ch >= '0') && (ch <= '9')) ch -= '0'; |
| else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10; |
| else goto badhex; |
| |
| if((cl >= '0') && (cl <= '9')) cl -= '0'; |
| else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10; |
| else goto badhex; |
| |
| *q++ = (ch << 4) | cl; |
| } |
| |
| if(len) *len = q - hexbuf; |
| |
| return hexbuf; |
| |
| err: |
| if(hexbuf) OPENSSL_free(hexbuf); |
| OPENSSL_PUT_ERROR(X509V3, string_to_hex, ERR_R_MALLOC_FAILURE); |
| return NULL; |
| |
| badhex: |
| OPENSSL_free(hexbuf); |
| OPENSSL_PUT_ERROR(X509V3, string_to_hex, X509V3_R_ILLEGAL_HEX_DIGIT); |
| return NULL; |
| |
| } |
| |
| /* V2I name comparison function: returns zero if 'name' matches |
| * cmp or cmp.* |
| */ |
| |
| int name_cmp(const char *name, const char *cmp) |
| { |
| int len, ret; |
| char c; |
| len = strlen(cmp); |
| if((ret = strncmp(name, cmp, len))) return ret; |
| c = name[len]; |
| if(!c || (c=='.')) return 0; |
| return 1; |
| } |
| |
| static int sk_strcmp(const OPENSSL_STRING *a, const OPENSSL_STRING *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; |
| size_t 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; |
| size_t j; |
| /* 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(j = 0; j < sk_GENERAL_NAME_num(gens); j++) |
| { |
| gen = sk_GENERAL_NAME_value(gens, j); |
| 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, NULL, (char *)email->data)) 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 && OPENSSL_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 |
| && OPENSSL_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; |
| size_t i; |
| int j; |
| 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; |
| } |
| j = -1; |
| name = X509_get_subject_name(x); |
| while((j = X509_NAME_get_index_by_NID(name, cnid, j)) >= 0) |
| { |
| X509_NAME_ENTRY *ne; |
| ASN1_STRING *str; |
| ne = X509_NAME_get_entry(name, j); |
| 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) |
| { |
| 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) |
| { |
| 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) |
| { |
| 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; |
| 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 mval; |
| size_t i; |
| 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++) |
| if ((*p == ':') || (*p == ',') || (*p == '.')) |
| { |
| p++; |
| if(*p) type = p; |
| break; |
| } |
| if (*type == '+') |
| { |
| 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; |
| } |