[331] | 1 | /*
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| 2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /* X509 v3 extension utilities */
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| 11 |
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| 12 | #include <stdio.h>
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| 13 | #include <ctype.h>
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| 14 | #include "internal/cryptlib.h"
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| 15 | #include <openssl/conf.h>
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| 16 | #include <openssl/x509v3.h>
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| 17 | #include "internal/x509_int.h"
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| 18 | #include <openssl/bn.h>
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| 19 | #include "ext_dat.h"
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| 20 |
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| 21 | static char *strip_spaces(char *name);
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| 22 | static int sk_strcmp(const char *const *a, const char *const *b);
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| 23 | static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
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| 24 | GENERAL_NAMES *gens);
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| 25 | static void str_free(OPENSSL_STRING str);
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| 26 | static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, const ASN1_IA5STRING *email);
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| 27 |
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| 28 | static int ipv4_from_asc(unsigned char *v4, const char *in);
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| 29 | static int ipv6_from_asc(unsigned char *v6, const char *in);
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| 30 | static int ipv6_cb(const char *elem, int len, void *usr);
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| 31 | static int ipv6_hex(unsigned char *out, const char *in, int inlen);
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| 32 |
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| 33 | /* Add a CONF_VALUE name value pair to stack */
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| 34 |
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| 35 | int X509V3_add_value(const char *name, const char *value,
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| 36 | STACK_OF(CONF_VALUE) **extlist)
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| 37 | {
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| 38 | CONF_VALUE *vtmp = NULL;
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| 39 | char *tname = NULL, *tvalue = NULL;
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| 40 |
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| 41 | if (name && (tname = OPENSSL_strdup(name)) == NULL)
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| 42 | goto err;
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| 43 | if (value && (tvalue = OPENSSL_strdup(value)) == NULL)
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| 44 | goto err;
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| 45 | if ((vtmp = OPENSSL_malloc(sizeof(*vtmp))) == NULL)
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| 46 | goto err;
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| 47 | if (*extlist == NULL && (*extlist = sk_CONF_VALUE_new_null()) == NULL)
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| 48 | goto err;
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| 49 | vtmp->section = NULL;
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| 50 | vtmp->name = tname;
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| 51 | vtmp->value = tvalue;
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| 52 | if (!sk_CONF_VALUE_push(*extlist, vtmp))
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| 53 | goto err;
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| 54 | return 1;
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| 55 | err:
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| 56 | X509V3err(X509V3_F_X509V3_ADD_VALUE, ERR_R_MALLOC_FAILURE);
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| 57 | OPENSSL_free(vtmp);
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| 58 | OPENSSL_free(tname);
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| 59 | OPENSSL_free(tvalue);
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| 60 | return 0;
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| 61 | }
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| 62 |
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| 63 | int X509V3_add_value_uchar(const char *name, const unsigned char *value,
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| 64 | STACK_OF(CONF_VALUE) **extlist)
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| 65 | {
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| 66 | return X509V3_add_value(name, (const char *)value, extlist);
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| 67 | }
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| 68 |
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| 69 | /* Free function for STACK_OF(CONF_VALUE) */
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| 70 |
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| 71 | void X509V3_conf_free(CONF_VALUE *conf)
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| 72 | {
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| 73 | if (!conf)
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| 74 | return;
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| 75 | OPENSSL_free(conf->name);
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| 76 | OPENSSL_free(conf->value);
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| 77 | OPENSSL_free(conf->section);
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| 78 | OPENSSL_free(conf);
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| 79 | }
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| 80 |
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| 81 | int X509V3_add_value_bool(const char *name, int asn1_bool,
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| 82 | STACK_OF(CONF_VALUE) **extlist)
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| 83 | {
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| 84 | if (asn1_bool)
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| 85 | return X509V3_add_value(name, "TRUE", extlist);
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| 86 | return X509V3_add_value(name, "FALSE", extlist);
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| 87 | }
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| 88 |
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| 89 | int X509V3_add_value_bool_nf(const char *name, int asn1_bool,
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| 90 | STACK_OF(CONF_VALUE) **extlist)
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| 91 | {
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| 92 | if (asn1_bool)
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| 93 | return X509V3_add_value(name, "TRUE", extlist);
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| 94 | return 1;
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| 95 | }
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| 96 |
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| 97 | char *i2s_ASN1_ENUMERATED(X509V3_EXT_METHOD *method, const ASN1_ENUMERATED *a)
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| 98 | {
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| 99 | BIGNUM *bntmp = NULL;
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| 100 | char *strtmp = NULL;
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| 101 |
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| 102 | if (!a)
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| 103 | return NULL;
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| 104 | if ((bntmp = ASN1_ENUMERATED_to_BN(a, NULL)) == NULL
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| 105 | || (strtmp = BN_bn2dec(bntmp)) == NULL)
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| 106 | X509V3err(X509V3_F_I2S_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
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| 107 | BN_free(bntmp);
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| 108 | return strtmp;
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| 109 | }
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| 110 |
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| 111 | char *i2s_ASN1_INTEGER(X509V3_EXT_METHOD *method, const ASN1_INTEGER *a)
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| 112 | {
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| 113 | BIGNUM *bntmp = NULL;
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| 114 | char *strtmp = NULL;
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| 115 |
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| 116 | if (!a)
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| 117 | return NULL;
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| 118 | if ((bntmp = ASN1_INTEGER_to_BN(a, NULL)) == NULL
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| 119 | || (strtmp = BN_bn2dec(bntmp)) == NULL)
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| 120 | X509V3err(X509V3_F_I2S_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
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| 121 | BN_free(bntmp);
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| 122 | return strtmp;
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| 123 | }
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| 124 |
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| 125 | ASN1_INTEGER *s2i_ASN1_INTEGER(X509V3_EXT_METHOD *method, const char *value)
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| 126 | {
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| 127 | BIGNUM *bn = NULL;
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| 128 | ASN1_INTEGER *aint;
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| 129 | int isneg, ishex;
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| 130 | int ret;
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| 131 | if (value == NULL) {
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| 132 | X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_INVALID_NULL_VALUE);
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| 133 | return NULL;
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| 134 | }
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| 135 | bn = BN_new();
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| 136 | if (bn == NULL) {
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| 137 | X509V3err(X509V3_F_S2I_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
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| 138 | return NULL;
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| 139 | }
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| 140 | if (value[0] == '-') {
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| 141 | value++;
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| 142 | isneg = 1;
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| 143 | } else
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| 144 | isneg = 0;
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| 145 |
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| 146 | if (value[0] == '0' && ((value[1] == 'x') || (value[1] == 'X'))) {
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| 147 | value += 2;
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| 148 | ishex = 1;
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| 149 | } else
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| 150 | ishex = 0;
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| 151 |
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| 152 | if (ishex)
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| 153 | ret = BN_hex2bn(&bn, value);
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| 154 | else
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| 155 | ret = BN_dec2bn(&bn, value);
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| 156 |
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| 157 | if (!ret || value[ret]) {
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| 158 | BN_free(bn);
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| 159 | X509V3err(X509V3_F_S2I_ASN1_INTEGER, X509V3_R_BN_DEC2BN_ERROR);
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| 160 | return NULL;
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| 161 | }
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| 162 |
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| 163 | if (isneg && BN_is_zero(bn))
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| 164 | isneg = 0;
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| 165 |
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| 166 | aint = BN_to_ASN1_INTEGER(bn, NULL);
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| 167 | BN_free(bn);
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| 168 | if (!aint) {
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| 169 | X509V3err(X509V3_F_S2I_ASN1_INTEGER,
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| 170 | X509V3_R_BN_TO_ASN1_INTEGER_ERROR);
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| 171 | return NULL;
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| 172 | }
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| 173 | if (isneg)
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| 174 | aint->type |= V_ASN1_NEG;
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| 175 | return aint;
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| 176 | }
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| 177 |
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| 178 | int X509V3_add_value_int(const char *name, const ASN1_INTEGER *aint,
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| 179 | STACK_OF(CONF_VALUE) **extlist)
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| 180 | {
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| 181 | char *strtmp;
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| 182 | int ret;
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| 183 |
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| 184 | if (!aint)
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| 185 | return 1;
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| 186 | if ((strtmp = i2s_ASN1_INTEGER(NULL, aint)) == NULL)
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| 187 | return 0;
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| 188 | ret = X509V3_add_value(name, strtmp, extlist);
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| 189 | OPENSSL_free(strtmp);
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| 190 | return ret;
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| 191 | }
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| 192 |
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| 193 | int X509V3_get_value_bool(const CONF_VALUE *value, int *asn1_bool)
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| 194 | {
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| 195 | const char *btmp;
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| 196 |
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| 197 | if ((btmp = value->value) == NULL)
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| 198 | goto err;
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| 199 | if (strcmp(btmp, "TRUE") == 0
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| 200 | || strcmp(btmp, "true") == 0
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| 201 | || strcmp(btmp, "Y") == 0
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| 202 | || strcmp(btmp, "y") == 0
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| 203 | || strcmp(btmp, "YES") == 0
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| 204 | || strcmp(btmp, "yes") == 0) {
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| 205 | *asn1_bool = 0xff;
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| 206 | return 1;
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| 207 | }
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| 208 | if (strcmp(btmp, "FALSE") == 0
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| 209 | || strcmp(btmp, "false") == 0
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| 210 | || strcmp(btmp, "N") == 0
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| 211 | || strcmp(btmp, "n") == 0
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| 212 | || strcmp(btmp, "NO") == 0
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| 213 | || strcmp(btmp, "no") == 0) {
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| 214 | *asn1_bool = 0;
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| 215 | return 1;
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| 216 | }
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| 217 | err:
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| 218 | X509V3err(X509V3_F_X509V3_GET_VALUE_BOOL,
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| 219 | X509V3_R_INVALID_BOOLEAN_STRING);
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| 220 | X509V3_conf_err(value);
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| 221 | return 0;
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| 222 | }
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| 223 |
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| 224 | int X509V3_get_value_int(const CONF_VALUE *value, ASN1_INTEGER **aint)
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| 225 | {
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| 226 | ASN1_INTEGER *itmp;
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| 227 |
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| 228 | if ((itmp = s2i_ASN1_INTEGER(NULL, value->value)) == NULL) {
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| 229 | X509V3_conf_err(value);
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| 230 | return 0;
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| 231 | }
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| 232 | *aint = itmp;
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| 233 | return 1;
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| 234 | }
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| 235 |
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| 236 | #define HDR_NAME 1
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| 237 | #define HDR_VALUE 2
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| 238 |
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| 239 | /*
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| 240 | * #define DEBUG
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| 241 | */
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| 242 |
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| 243 | STACK_OF(CONF_VALUE) *X509V3_parse_list(const char *line)
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| 244 | {
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| 245 | char *p, *q, c;
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| 246 | char *ntmp, *vtmp;
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| 247 | STACK_OF(CONF_VALUE) *values = NULL;
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| 248 | char *linebuf;
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| 249 | int state;
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| 250 | /* We are going to modify the line so copy it first */
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| 251 | linebuf = OPENSSL_strdup(line);
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| 252 | if (linebuf == NULL) {
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| 253 | X509V3err(X509V3_F_X509V3_PARSE_LIST, ERR_R_MALLOC_FAILURE);
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| 254 | goto err;
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| 255 | }
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| 256 | state = HDR_NAME;
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| 257 | ntmp = NULL;
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| 258 | /* Go through all characters */
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| 259 | for (p = linebuf, q = linebuf; (c = *p) && (c != '\r') && (c != '\n');
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| 260 | p++) {
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| 261 |
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| 262 | switch (state) {
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| 263 | case HDR_NAME:
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| 264 | if (c == ':') {
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| 265 | state = HDR_VALUE;
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| 266 | *p = 0;
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| 267 | ntmp = strip_spaces(q);
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| 268 | if (!ntmp) {
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| 269 | X509V3err(X509V3_F_X509V3_PARSE_LIST,
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| 270 | X509V3_R_INVALID_NULL_NAME);
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| 271 | goto err;
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| 272 | }
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| 273 | q = p + 1;
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| 274 | } else if (c == ',') {
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| 275 | *p = 0;
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| 276 | ntmp = strip_spaces(q);
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| 277 | q = p + 1;
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| 278 | if (!ntmp) {
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| 279 | X509V3err(X509V3_F_X509V3_PARSE_LIST,
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| 280 | X509V3_R_INVALID_NULL_NAME);
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| 281 | goto err;
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| 282 | }
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| 283 | X509V3_add_value(ntmp, NULL, &values);
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| 284 | }
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| 285 | break;
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| 286 |
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| 287 | case HDR_VALUE:
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| 288 | if (c == ',') {
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| 289 | state = HDR_NAME;
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| 290 | *p = 0;
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| 291 | vtmp = strip_spaces(q);
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| 292 | if (!vtmp) {
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| 293 | X509V3err(X509V3_F_X509V3_PARSE_LIST,
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| 294 | X509V3_R_INVALID_NULL_VALUE);
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| 295 | goto err;
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| 296 | }
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| 297 | X509V3_add_value(ntmp, vtmp, &values);
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| 298 | ntmp = NULL;
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| 299 | q = p + 1;
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| 300 | }
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| 301 |
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| 302 | }
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| 303 | }
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| 304 |
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| 305 | if (state == HDR_VALUE) {
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| 306 | vtmp = strip_spaces(q);
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| 307 | if (!vtmp) {
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| 308 | X509V3err(X509V3_F_X509V3_PARSE_LIST,
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| 309 | X509V3_R_INVALID_NULL_VALUE);
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| 310 | goto err;
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| 311 | }
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| 312 | X509V3_add_value(ntmp, vtmp, &values);
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| 313 | } else {
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| 314 | ntmp = strip_spaces(q);
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| 315 | if (!ntmp) {
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| 316 | X509V3err(X509V3_F_X509V3_PARSE_LIST, X509V3_R_INVALID_NULL_NAME);
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| 317 | goto err;
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| 318 | }
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| 319 | X509V3_add_value(ntmp, NULL, &values);
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| 320 | }
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| 321 | OPENSSL_free(linebuf);
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| 322 | return values;
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| 323 |
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| 324 | err:
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| 325 | OPENSSL_free(linebuf);
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| 326 | sk_CONF_VALUE_pop_free(values, X509V3_conf_free);
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| 327 | return NULL;
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| 328 |
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| 329 | }
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| 330 |
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| 331 | /* Delete leading and trailing spaces from a string */
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| 332 | static char *strip_spaces(char *name)
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| 333 | {
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| 334 | char *p, *q;
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| 335 | /* Skip over leading spaces */
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| 336 | p = name;
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| 337 | while (*p && isspace((unsigned char)*p))
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| 338 | p++;
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| 339 | if (!*p)
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| 340 | return NULL;
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| 341 | q = p + strlen(p) - 1;
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| 342 | while ((q != p) && isspace((unsigned char)*q))
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| 343 | q--;
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| 344 | if (p != q)
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| 345 | q[1] = 0;
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| 346 | if (!*p)
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| 347 | return NULL;
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| 348 | return p;
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| 349 | }
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| 350 |
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| 351 |
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| 352 | /*
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| 353 | * V2I name comparison function: returns zero if 'name' matches cmp or cmp.*
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| 354 | */
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| 355 |
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| 356 | int name_cmp(const char *name, const char *cmp)
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| 357 | {
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| 358 | int len, ret;
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| 359 | char c;
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| 360 | len = strlen(cmp);
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| 361 | if ((ret = strncmp(name, cmp, len)))
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| 362 | return ret;
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| 363 | c = name[len];
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| 364 | if (!c || (c == '.'))
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| 365 | return 0;
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| 366 | return 1;
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| 367 | }
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| 368 |
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| 369 | static int sk_strcmp(const char *const *a, const char *const *b)
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| 370 | {
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| 371 | return strcmp(*a, *b);
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| 372 | }
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| 373 |
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| 374 | STACK_OF(OPENSSL_STRING) *X509_get1_email(X509 *x)
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| 375 | {
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| 376 | GENERAL_NAMES *gens;
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| 377 | STACK_OF(OPENSSL_STRING) *ret;
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| 378 |
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| 379 | gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
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| 380 | ret = get_email(X509_get_subject_name(x), gens);
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| 381 | sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
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| 382 | return ret;
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| 383 | }
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| 384 |
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| 385 | STACK_OF(OPENSSL_STRING) *X509_get1_ocsp(X509 *x)
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| 386 | {
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| 387 | AUTHORITY_INFO_ACCESS *info;
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| 388 | STACK_OF(OPENSSL_STRING) *ret = NULL;
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| 389 | int i;
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| 390 |
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| 391 | info = X509_get_ext_d2i(x, NID_info_access, NULL, NULL);
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| 392 | if (!info)
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| 393 | return NULL;
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| 394 | for (i = 0; i < sk_ACCESS_DESCRIPTION_num(info); i++) {
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| 395 | ACCESS_DESCRIPTION *ad = sk_ACCESS_DESCRIPTION_value(info, i);
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| 396 | if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
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| 397 | if (ad->location->type == GEN_URI) {
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| 398 | if (!append_ia5
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| 399 | (&ret, ad->location->d.uniformResourceIdentifier))
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| 400 | break;
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| 401 | }
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| 402 | }
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| 403 | }
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| 404 | AUTHORITY_INFO_ACCESS_free(info);
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| 405 | return ret;
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| 406 | }
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| 407 |
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| 408 | STACK_OF(OPENSSL_STRING) *X509_REQ_get1_email(X509_REQ *x)
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| 409 | {
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| 410 | GENERAL_NAMES *gens;
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| 411 | STACK_OF(X509_EXTENSION) *exts;
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| 412 | STACK_OF(OPENSSL_STRING) *ret;
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| 413 |
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| 414 | exts = X509_REQ_get_extensions(x);
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| 415 | gens = X509V3_get_d2i(exts, NID_subject_alt_name, NULL, NULL);
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| 416 | ret = get_email(X509_REQ_get_subject_name(x), gens);
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| 417 | sk_GENERAL_NAME_pop_free(gens, GENERAL_NAME_free);
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| 418 | sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
|
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| 419 | return ret;
|
---|
| 420 | }
|
---|
| 421 |
|
---|
| 422 | static STACK_OF(OPENSSL_STRING) *get_email(X509_NAME *name,
|
---|
| 423 | GENERAL_NAMES *gens)
|
---|
| 424 | {
|
---|
| 425 | STACK_OF(OPENSSL_STRING) *ret = NULL;
|
---|
| 426 | X509_NAME_ENTRY *ne;
|
---|
| 427 | ASN1_IA5STRING *email;
|
---|
| 428 | GENERAL_NAME *gen;
|
---|
| 429 | int i;
|
---|
| 430 | /* Now add any email address(es) to STACK */
|
---|
| 431 | i = -1;
|
---|
| 432 | /* First supplied X509_NAME */
|
---|
| 433 | while ((i = X509_NAME_get_index_by_NID(name,
|
---|
| 434 | NID_pkcs9_emailAddress, i)) >= 0) {
|
---|
| 435 | ne = X509_NAME_get_entry(name, i);
|
---|
| 436 | email = X509_NAME_ENTRY_get_data(ne);
|
---|
| 437 | if (!append_ia5(&ret, email))
|
---|
| 438 | return NULL;
|
---|
| 439 | }
|
---|
| 440 | for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
|
---|
| 441 | gen = sk_GENERAL_NAME_value(gens, i);
|
---|
| 442 | if (gen->type != GEN_EMAIL)
|
---|
| 443 | continue;
|
---|
| 444 | if (!append_ia5(&ret, gen->d.ia5))
|
---|
| 445 | return NULL;
|
---|
| 446 | }
|
---|
| 447 | return ret;
|
---|
| 448 | }
|
---|
| 449 |
|
---|
| 450 | static void str_free(OPENSSL_STRING str)
|
---|
| 451 | {
|
---|
| 452 | OPENSSL_free(str);
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | static int append_ia5(STACK_OF(OPENSSL_STRING) **sk, const ASN1_IA5STRING *email)
|
---|
| 456 | {
|
---|
| 457 | char *emtmp;
|
---|
| 458 | /* First some sanity checks */
|
---|
| 459 | if (email->type != V_ASN1_IA5STRING)
|
---|
| 460 | return 1;
|
---|
| 461 | if (!email->data || !email->length)
|
---|
| 462 | return 1;
|
---|
| 463 | if (*sk == NULL)
|
---|
| 464 | *sk = sk_OPENSSL_STRING_new(sk_strcmp);
|
---|
| 465 | if (*sk == NULL)
|
---|
| 466 | return 0;
|
---|
| 467 | /* Don't add duplicates */
|
---|
| 468 | if (sk_OPENSSL_STRING_find(*sk, (char *)email->data) != -1)
|
---|
| 469 | return 1;
|
---|
| 470 | emtmp = OPENSSL_strdup((char *)email->data);
|
---|
| 471 | if (emtmp == NULL || !sk_OPENSSL_STRING_push(*sk, emtmp)) {
|
---|
| 472 | OPENSSL_free(emtmp); /* free on push failure */
|
---|
| 473 | X509_email_free(*sk);
|
---|
| 474 | *sk = NULL;
|
---|
| 475 | return 0;
|
---|
| 476 | }
|
---|
| 477 | return 1;
|
---|
| 478 | }
|
---|
| 479 |
|
---|
| 480 | void X509_email_free(STACK_OF(OPENSSL_STRING) *sk)
|
---|
| 481 | {
|
---|
| 482 | sk_OPENSSL_STRING_pop_free(sk, str_free);
|
---|
| 483 | }
|
---|
| 484 |
|
---|
| 485 | typedef int (*equal_fn) (const unsigned char *pattern, size_t pattern_len,
|
---|
| 486 | const unsigned char *subject, size_t subject_len,
|
---|
| 487 | unsigned int flags);
|
---|
| 488 |
|
---|
| 489 | /* Skip pattern prefix to match "wildcard" subject */
|
---|
| 490 | static void skip_prefix(const unsigned char **p, size_t *plen,
|
---|
| 491 | size_t subject_len,
|
---|
| 492 | unsigned int flags)
|
---|
| 493 | {
|
---|
| 494 | const unsigned char *pattern = *p;
|
---|
| 495 | size_t pattern_len = *plen;
|
---|
| 496 |
|
---|
| 497 | /*
|
---|
| 498 | * If subject starts with a leading '.' followed by more octets, and
|
---|
| 499 | * pattern is longer, compare just an equal-length suffix with the
|
---|
| 500 | * full subject (starting at the '.'), provided the prefix contains
|
---|
| 501 | * no NULs.
|
---|
| 502 | */
|
---|
| 503 | if ((flags & _X509_CHECK_FLAG_DOT_SUBDOMAINS) == 0)
|
---|
| 504 | return;
|
---|
| 505 |
|
---|
| 506 | while (pattern_len > subject_len && *pattern) {
|
---|
| 507 | if ((flags & X509_CHECK_FLAG_SINGLE_LABEL_SUBDOMAINS) &&
|
---|
| 508 | *pattern == '.')
|
---|
| 509 | break;
|
---|
| 510 | ++pattern;
|
---|
| 511 | --pattern_len;
|
---|
| 512 | }
|
---|
| 513 |
|
---|
| 514 | /* Skip if entire prefix acceptable */
|
---|
| 515 | if (pattern_len == subject_len) {
|
---|
| 516 | *p = pattern;
|
---|
| 517 | *plen = pattern_len;
|
---|
| 518 | }
|
---|
| 519 | }
|
---|
| 520 |
|
---|
| 521 | /* Compare while ASCII ignoring case. */
|
---|
| 522 | static int equal_nocase(const unsigned char *pattern, size_t pattern_len,
|
---|
| 523 | const unsigned char *subject, size_t subject_len,
|
---|
| 524 | unsigned int flags)
|
---|
| 525 | {
|
---|
| 526 | skip_prefix(&pattern, &pattern_len, subject_len, flags);
|
---|
| 527 | if (pattern_len != subject_len)
|
---|
| 528 | return 0;
|
---|
| 529 | while (pattern_len) {
|
---|
| 530 | unsigned char l = *pattern;
|
---|
| 531 | unsigned char r = *subject;
|
---|
| 532 | /* The pattern must not contain NUL characters. */
|
---|
| 533 | if (l == 0)
|
---|
| 534 | return 0;
|
---|
| 535 | if (l != r) {
|
---|
| 536 | if ('A' <= l && l <= 'Z')
|
---|
| 537 | l = (l - 'A') + 'a';
|
---|
| 538 | if ('A' <= r && r <= 'Z')
|
---|
| 539 | r = (r - 'A') + 'a';
|
---|
| 540 | if (l != r)
|
---|
| 541 | return 0;
|
---|
| 542 | }
|
---|
| 543 | ++pattern;
|
---|
| 544 | ++subject;
|
---|
| 545 | --pattern_len;
|
---|
| 546 | }
|
---|
| 547 | return 1;
|
---|
| 548 | }
|
---|
| 549 |
|
---|
| 550 | /* Compare using memcmp. */
|
---|
| 551 | static int equal_case(const unsigned char *pattern, size_t pattern_len,
|
---|
| 552 | const unsigned char *subject, size_t subject_len,
|
---|
| 553 | unsigned int flags)
|
---|
| 554 | {
|
---|
| 555 | skip_prefix(&pattern, &pattern_len, subject_len, flags);
|
---|
| 556 | if (pattern_len != subject_len)
|
---|
| 557 | return 0;
|
---|
| 558 | return !memcmp(pattern, subject, pattern_len);
|
---|
| 559 | }
|
---|
| 560 |
|
---|
| 561 | /*
|
---|
| 562 | * RFC 5280, section 7.5, requires that only the domain is compared in a
|
---|
| 563 | * case-insensitive manner.
|
---|
| 564 | */
|
---|
| 565 | static int equal_email(const unsigned char *a, size_t a_len,
|
---|
| 566 | const unsigned char *b, size_t b_len,
|
---|
| 567 | unsigned int unused_flags)
|
---|
| 568 | {
|
---|
| 569 | size_t i = a_len;
|
---|
| 570 | if (a_len != b_len)
|
---|
| 571 | return 0;
|
---|
| 572 | /*
|
---|
| 573 | * We search backwards for the '@' character, so that we do not have to
|
---|
| 574 | * deal with quoted local-parts. The domain part is compared in a
|
---|
| 575 | * case-insensitive manner.
|
---|
| 576 | */
|
---|
| 577 | while (i > 0) {
|
---|
| 578 | --i;
|
---|
| 579 | if (a[i] == '@' || b[i] == '@') {
|
---|
| 580 | if (!equal_nocase(a + i, a_len - i, b + i, a_len - i, 0))
|
---|
| 581 | return 0;
|
---|
| 582 | break;
|
---|
| 583 | }
|
---|
| 584 | }
|
---|
| 585 | if (i == 0)
|
---|
| 586 | i = a_len;
|
---|
| 587 | return equal_case(a, i, b, i, 0);
|
---|
| 588 | }
|
---|
| 589 |
|
---|
| 590 | /*
|
---|
| 591 | * Compare the prefix and suffix with the subject, and check that the
|
---|
| 592 | * characters in-between are valid.
|
---|
| 593 | */
|
---|
| 594 | static int wildcard_match(const unsigned char *prefix, size_t prefix_len,
|
---|
| 595 | const unsigned char *suffix, size_t suffix_len,
|
---|
| 596 | const unsigned char *subject, size_t subject_len,
|
---|
| 597 | unsigned int flags)
|
---|
| 598 | {
|
---|
| 599 | const unsigned char *wildcard_start;
|
---|
| 600 | const unsigned char *wildcard_end;
|
---|
| 601 | const unsigned char *p;
|
---|
| 602 | int allow_multi = 0;
|
---|
| 603 | int allow_idna = 0;
|
---|
| 604 |
|
---|
| 605 | if (subject_len < prefix_len + suffix_len)
|
---|
| 606 | return 0;
|
---|
| 607 | if (!equal_nocase(prefix, prefix_len, subject, prefix_len, flags))
|
---|
| 608 | return 0;
|
---|
| 609 | wildcard_start = subject + prefix_len;
|
---|
| 610 | wildcard_end = subject + (subject_len - suffix_len);
|
---|
| 611 | if (!equal_nocase(wildcard_end, suffix_len, suffix, suffix_len, flags))
|
---|
| 612 | return 0;
|
---|
| 613 | /*
|
---|
| 614 | * If the wildcard makes up the entire first label, it must match at
|
---|
| 615 | * least one character.
|
---|
| 616 | */
|
---|
| 617 | if (prefix_len == 0 && *suffix == '.') {
|
---|
| 618 | if (wildcard_start == wildcard_end)
|
---|
| 619 | return 0;
|
---|
| 620 | allow_idna = 1;
|
---|
| 621 | if (flags & X509_CHECK_FLAG_MULTI_LABEL_WILDCARDS)
|
---|
| 622 | allow_multi = 1;
|
---|
| 623 | }
|
---|
| 624 | /* IDNA labels cannot match partial wildcards */
|
---|
| 625 | if (!allow_idna &&
|
---|
| 626 | subject_len >= 4 && strncasecmp((char *)subject, "xn--", 4) == 0)
|
---|
| 627 | return 0;
|
---|
| 628 | /* The wildcard may match a literal '*' */
|
---|
| 629 | if (wildcard_end == wildcard_start + 1 && *wildcard_start == '*')
|
---|
| 630 | return 1;
|
---|
| 631 | /*
|
---|
| 632 | * Check that the part matched by the wildcard contains only
|
---|
| 633 | * permitted characters and only matches a single label unless
|
---|
| 634 | * allow_multi is set.
|
---|
| 635 | */
|
---|
| 636 | for (p = wildcard_start; p != wildcard_end; ++p)
|
---|
| 637 | if (!(('0' <= *p && *p <= '9') ||
|
---|
| 638 | ('A' <= *p && *p <= 'Z') ||
|
---|
| 639 | ('a' <= *p && *p <= 'z') ||
|
---|
| 640 | *p == '-' || (allow_multi && *p == '.')))
|
---|
| 641 | return 0;
|
---|
| 642 | return 1;
|
---|
| 643 | }
|
---|
| 644 |
|
---|
| 645 | #define LABEL_START (1 << 0)
|
---|
| 646 | #define LABEL_END (1 << 1)
|
---|
| 647 | #define LABEL_HYPHEN (1 << 2)
|
---|
| 648 | #define LABEL_IDNA (1 << 3)
|
---|
| 649 |
|
---|
| 650 | static const unsigned char *valid_star(const unsigned char *p, size_t len,
|
---|
| 651 | unsigned int flags)
|
---|
| 652 | {
|
---|
| 653 | const unsigned char *star = 0;
|
---|
| 654 | size_t i;
|
---|
| 655 | int state = LABEL_START;
|
---|
| 656 | int dots = 0;
|
---|
| 657 | for (i = 0; i < len; ++i) {
|
---|
| 658 | /*
|
---|
| 659 | * Locate first and only legal wildcard, either at the start
|
---|
| 660 | * or end of a non-IDNA first and not final label.
|
---|
| 661 | */
|
---|
| 662 | if (p[i] == '*') {
|
---|
| 663 | int atstart = (state & LABEL_START);
|
---|
| 664 | int atend = (i == len - 1 || p[i + 1] == '.');
|
---|
| 665 | /*-
|
---|
| 666 | * At most one wildcard per pattern.
|
---|
| 667 | * No wildcards in IDNA labels.
|
---|
| 668 | * No wildcards after the first label.
|
---|
| 669 | */
|
---|
| 670 | if (star != NULL || (state & LABEL_IDNA) != 0 || dots)
|
---|
| 671 | return NULL;
|
---|
| 672 | /* Only full-label '*.example.com' wildcards? */
|
---|
| 673 | if ((flags & X509_CHECK_FLAG_NO_PARTIAL_WILDCARDS)
|
---|
| 674 | && (!atstart || !atend))
|
---|
| 675 | return NULL;
|
---|
| 676 | /* No 'foo*bar' wildcards */
|
---|
| 677 | if (!atstart && !atend)
|
---|
| 678 | return NULL;
|
---|
| 679 | star = &p[i];
|
---|
| 680 | state &= ~LABEL_START;
|
---|
| 681 | } else if (('a' <= p[i] && p[i] <= 'z')
|
---|
| 682 | || ('A' <= p[i] && p[i] <= 'Z')
|
---|
| 683 | || ('0' <= p[i] && p[i] <= '9')) {
|
---|
| 684 | if ((state & LABEL_START) != 0
|
---|
| 685 | && len - i >= 4 && strncasecmp((char *)&p[i], "xn--", 4) == 0)
|
---|
| 686 | state |= LABEL_IDNA;
|
---|
| 687 | state &= ~(LABEL_HYPHEN | LABEL_START);
|
---|
| 688 | } else if (p[i] == '.') {
|
---|
| 689 | if ((state & (LABEL_HYPHEN | LABEL_START)) != 0)
|
---|
| 690 | return NULL;
|
---|
| 691 | state = LABEL_START;
|
---|
| 692 | ++dots;
|
---|
| 693 | } else if (p[i] == '-') {
|
---|
| 694 | /* no domain/subdomain starts with '-' */
|
---|
| 695 | if ((state & LABEL_START) != 0)
|
---|
| 696 | return NULL;
|
---|
| 697 | state |= LABEL_HYPHEN;
|
---|
| 698 | } else
|
---|
| 699 | return NULL;
|
---|
| 700 | }
|
---|
| 701 |
|
---|
| 702 | /*
|
---|
| 703 | * The final label must not end in a hyphen or ".", and
|
---|
| 704 | * there must be at least two dots after the star.
|
---|
| 705 | */
|
---|
| 706 | if ((state & (LABEL_START | LABEL_HYPHEN)) != 0 || dots < 2)
|
---|
| 707 | return NULL;
|
---|
| 708 | return star;
|
---|
| 709 | }
|
---|
| 710 |
|
---|
| 711 | /* Compare using wildcards. */
|
---|
| 712 | static int equal_wildcard(const unsigned char *pattern, size_t pattern_len,
|
---|
| 713 | const unsigned char *subject, size_t subject_len,
|
---|
| 714 | unsigned int flags)
|
---|
| 715 | {
|
---|
| 716 | const unsigned char *star = NULL;
|
---|
| 717 |
|
---|
| 718 | /*
|
---|
| 719 | * Subject names starting with '.' can only match a wildcard pattern
|
---|
| 720 | * via a subject sub-domain pattern suffix match.
|
---|
| 721 | */
|
---|
| 722 | if (!(subject_len > 1 && subject[0] == '.'))
|
---|
| 723 | star = valid_star(pattern, pattern_len, flags);
|
---|
| 724 | if (star == NULL)
|
---|
| 725 | return equal_nocase(pattern, pattern_len,
|
---|
| 726 | subject, subject_len, flags);
|
---|
| 727 | return wildcard_match(pattern, star - pattern,
|
---|
| 728 | star + 1, (pattern + pattern_len) - star - 1,
|
---|
| 729 | subject, subject_len, flags);
|
---|
| 730 | }
|
---|
| 731 |
|
---|
| 732 | /*
|
---|
| 733 | * Compare an ASN1_STRING to a supplied string. If they match return 1. If
|
---|
| 734 | * cmp_type > 0 only compare if string matches the type, otherwise convert it
|
---|
| 735 | * to UTF8.
|
---|
| 736 | */
|
---|
| 737 |
|
---|
| 738 | static int do_check_string(const ASN1_STRING *a, int cmp_type, equal_fn equal,
|
---|
| 739 | unsigned int flags, const char *b, size_t blen,
|
---|
| 740 | char **peername)
|
---|
| 741 | {
|
---|
| 742 | int rv = 0;
|
---|
| 743 |
|
---|
| 744 | if (!a->data || !a->length)
|
---|
| 745 | return 0;
|
---|
| 746 | if (cmp_type > 0) {
|
---|
| 747 | if (cmp_type != a->type)
|
---|
| 748 | return 0;
|
---|
| 749 | if (cmp_type == V_ASN1_IA5STRING)
|
---|
| 750 | rv = equal(a->data, a->length, (unsigned char *)b, blen, flags);
|
---|
| 751 | else if (a->length == (int)blen && !memcmp(a->data, b, blen))
|
---|
| 752 | rv = 1;
|
---|
| 753 | if (rv > 0 && peername)
|
---|
| 754 | *peername = OPENSSL_strndup((char *)a->data, a->length);
|
---|
| 755 | } else {
|
---|
| 756 | int astrlen;
|
---|
| 757 | unsigned char *astr;
|
---|
| 758 | astrlen = ASN1_STRING_to_UTF8(&astr, a);
|
---|
| 759 | if (astrlen < 0) {
|
---|
| 760 | /*
|
---|
| 761 | * -1 could be an internal malloc failure or a decoding error from
|
---|
| 762 | * malformed input; we can't distinguish.
|
---|
| 763 | */
|
---|
| 764 | return -1;
|
---|
| 765 | }
|
---|
| 766 | rv = equal(astr, astrlen, (unsigned char *)b, blen, flags);
|
---|
| 767 | if (rv > 0 && peername)
|
---|
| 768 | *peername = OPENSSL_strndup((char *)astr, astrlen);
|
---|
| 769 | OPENSSL_free(astr);
|
---|
| 770 | }
|
---|
| 771 | return rv;
|
---|
| 772 | }
|
---|
| 773 |
|
---|
| 774 | static int do_x509_check(X509 *x, const char *chk, size_t chklen,
|
---|
| 775 | unsigned int flags, int check_type, char **peername)
|
---|
| 776 | {
|
---|
| 777 | GENERAL_NAMES *gens = NULL;
|
---|
| 778 | X509_NAME *name = NULL;
|
---|
| 779 | int i;
|
---|
| 780 | int cnid = NID_undef;
|
---|
| 781 | int alt_type;
|
---|
| 782 | int san_present = 0;
|
---|
| 783 | int rv = 0;
|
---|
| 784 | equal_fn equal;
|
---|
| 785 |
|
---|
| 786 | /* See below, this flag is internal-only */
|
---|
| 787 | flags &= ~_X509_CHECK_FLAG_DOT_SUBDOMAINS;
|
---|
| 788 | if (check_type == GEN_EMAIL) {
|
---|
| 789 | cnid = NID_pkcs9_emailAddress;
|
---|
| 790 | alt_type = V_ASN1_IA5STRING;
|
---|
| 791 | equal = equal_email;
|
---|
| 792 | } else if (check_type == GEN_DNS) {
|
---|
| 793 | cnid = NID_commonName;
|
---|
| 794 | /* Implicit client-side DNS sub-domain pattern */
|
---|
| 795 | if (chklen > 1 && chk[0] == '.')
|
---|
| 796 | flags |= _X509_CHECK_FLAG_DOT_SUBDOMAINS;
|
---|
| 797 | alt_type = V_ASN1_IA5STRING;
|
---|
| 798 | if (flags & X509_CHECK_FLAG_NO_WILDCARDS)
|
---|
| 799 | equal = equal_nocase;
|
---|
| 800 | else
|
---|
| 801 | equal = equal_wildcard;
|
---|
| 802 | } else {
|
---|
| 803 | alt_type = V_ASN1_OCTET_STRING;
|
---|
| 804 | equal = equal_case;
|
---|
| 805 | }
|
---|
| 806 |
|
---|
| 807 | if (chklen == 0)
|
---|
| 808 | chklen = strlen(chk);
|
---|
| 809 |
|
---|
| 810 | gens = X509_get_ext_d2i(x, NID_subject_alt_name, NULL, NULL);
|
---|
| 811 | if (gens) {
|
---|
| 812 | for (i = 0; i < sk_GENERAL_NAME_num(gens); i++) {
|
---|
| 813 | GENERAL_NAME *gen;
|
---|
| 814 | ASN1_STRING *cstr;
|
---|
| 815 | gen = sk_GENERAL_NAME_value(gens, i);
|
---|
| 816 | if (gen->type != check_type)
|
---|
| 817 | continue;
|
---|
| 818 | san_present = 1;
|
---|
| 819 | if (check_type == GEN_EMAIL)
|
---|
| 820 | cstr = gen->d.rfc822Name;
|
---|
| 821 | else if (check_type == GEN_DNS)
|
---|
| 822 | cstr = gen->d.dNSName;
|
---|
| 823 | else
|
---|
| 824 | cstr = gen->d.iPAddress;
|
---|
| 825 | /* Positive on success, negative on error! */
|
---|
| 826 | if ((rv = do_check_string(cstr, alt_type, equal, flags,
|
---|
| 827 | chk, chklen, peername)) != 0)
|
---|
| 828 | break;
|
---|
| 829 | }
|
---|
| 830 | GENERAL_NAMES_free(gens);
|
---|
| 831 | if (rv != 0)
|
---|
| 832 | return rv;
|
---|
| 833 | if (san_present && !(flags & X509_CHECK_FLAG_ALWAYS_CHECK_SUBJECT))
|
---|
| 834 | return 0;
|
---|
| 835 | }
|
---|
| 836 |
|
---|
| 837 | /* We're done if CN-ID is not pertinent */
|
---|
| 838 | if (cnid == NID_undef || (flags & X509_CHECK_FLAG_NEVER_CHECK_SUBJECT))
|
---|
| 839 | return 0;
|
---|
| 840 |
|
---|
| 841 | i = -1;
|
---|
| 842 | name = X509_get_subject_name(x);
|
---|
| 843 | while ((i = X509_NAME_get_index_by_NID(name, cnid, i)) >= 0) {
|
---|
| 844 | const X509_NAME_ENTRY *ne = X509_NAME_get_entry(name, i);
|
---|
| 845 | const ASN1_STRING *str = X509_NAME_ENTRY_get_data(ne);
|
---|
| 846 |
|
---|
| 847 | /* Positive on success, negative on error! */
|
---|
| 848 | if ((rv = do_check_string(str, -1, equal, flags,
|
---|
| 849 | chk, chklen, peername)) != 0)
|
---|
| 850 | return rv;
|
---|
| 851 | }
|
---|
| 852 | return 0;
|
---|
| 853 | }
|
---|
| 854 |
|
---|
| 855 | int X509_check_host(X509 *x, const char *chk, size_t chklen,
|
---|
| 856 | unsigned int flags, char **peername)
|
---|
| 857 | {
|
---|
| 858 | if (chk == NULL)
|
---|
| 859 | return -2;
|
---|
| 860 | /*
|
---|
| 861 | * Embedded NULs are disallowed, except as the last character of a
|
---|
| 862 | * string of length 2 or more (tolerate caller including terminating
|
---|
| 863 | * NUL in string length).
|
---|
| 864 | */
|
---|
| 865 | if (chklen == 0)
|
---|
| 866 | chklen = strlen(chk);
|
---|
| 867 | else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
|
---|
| 868 | return -2;
|
---|
| 869 | if (chklen > 1 && chk[chklen - 1] == '\0')
|
---|
| 870 | --chklen;
|
---|
| 871 | return do_x509_check(x, chk, chklen, flags, GEN_DNS, peername);
|
---|
| 872 | }
|
---|
| 873 |
|
---|
| 874 | int X509_check_email(X509 *x, const char *chk, size_t chklen,
|
---|
| 875 | unsigned int flags)
|
---|
| 876 | {
|
---|
| 877 | if (chk == NULL)
|
---|
| 878 | return -2;
|
---|
| 879 | /*
|
---|
| 880 | * Embedded NULs are disallowed, except as the last character of a
|
---|
| 881 | * string of length 2 or more (tolerate caller including terminating
|
---|
| 882 | * NUL in string length).
|
---|
| 883 | */
|
---|
| 884 | if (chklen == 0)
|
---|
| 885 | chklen = strlen((char *)chk);
|
---|
| 886 | else if (memchr(chk, '\0', chklen > 1 ? chklen - 1 : chklen))
|
---|
| 887 | return -2;
|
---|
| 888 | if (chklen > 1 && chk[chklen - 1] == '\0')
|
---|
| 889 | --chklen;
|
---|
| 890 | return do_x509_check(x, chk, chklen, flags, GEN_EMAIL, NULL);
|
---|
| 891 | }
|
---|
| 892 |
|
---|
| 893 | int X509_check_ip(X509 *x, const unsigned char *chk, size_t chklen,
|
---|
| 894 | unsigned int flags)
|
---|
| 895 | {
|
---|
| 896 | if (chk == NULL)
|
---|
| 897 | return -2;
|
---|
| 898 | return do_x509_check(x, (char *)chk, chklen, flags, GEN_IPADD, NULL);
|
---|
| 899 | }
|
---|
| 900 |
|
---|
| 901 | int X509_check_ip_asc(X509 *x, const char *ipasc, unsigned int flags)
|
---|
| 902 | {
|
---|
| 903 | unsigned char ipout[16];
|
---|
| 904 | size_t iplen;
|
---|
| 905 |
|
---|
| 906 | if (ipasc == NULL)
|
---|
| 907 | return -2;
|
---|
| 908 | iplen = (size_t)a2i_ipadd(ipout, ipasc);
|
---|
| 909 | if (iplen == 0)
|
---|
| 910 | return -2;
|
---|
| 911 | return do_x509_check(x, (char *)ipout, iplen, flags, GEN_IPADD, NULL);
|
---|
| 912 | }
|
---|
| 913 |
|
---|
| 914 | /*
|
---|
| 915 | * Convert IP addresses both IPv4 and IPv6 into an OCTET STRING compatible
|
---|
| 916 | * with RFC3280.
|
---|
| 917 | */
|
---|
| 918 |
|
---|
| 919 | ASN1_OCTET_STRING *a2i_IPADDRESS(const char *ipasc)
|
---|
| 920 | {
|
---|
| 921 | unsigned char ipout[16];
|
---|
| 922 | ASN1_OCTET_STRING *ret;
|
---|
| 923 | int iplen;
|
---|
| 924 |
|
---|
| 925 | /* If string contains a ':' assume IPv6 */
|
---|
| 926 |
|
---|
| 927 | iplen = a2i_ipadd(ipout, ipasc);
|
---|
| 928 |
|
---|
| 929 | if (!iplen)
|
---|
| 930 | return NULL;
|
---|
| 931 |
|
---|
| 932 | ret = ASN1_OCTET_STRING_new();
|
---|
| 933 | if (ret == NULL)
|
---|
| 934 | return NULL;
|
---|
| 935 | if (!ASN1_OCTET_STRING_set(ret, ipout, iplen)) {
|
---|
| 936 | ASN1_OCTET_STRING_free(ret);
|
---|
| 937 | return NULL;
|
---|
| 938 | }
|
---|
| 939 | return ret;
|
---|
| 940 | }
|
---|
| 941 |
|
---|
| 942 | ASN1_OCTET_STRING *a2i_IPADDRESS_NC(const char *ipasc)
|
---|
| 943 | {
|
---|
| 944 | ASN1_OCTET_STRING *ret = NULL;
|
---|
| 945 | unsigned char ipout[32];
|
---|
| 946 | char *iptmp = NULL, *p;
|
---|
| 947 | int iplen1, iplen2;
|
---|
| 948 | p = strchr(ipasc, '/');
|
---|
| 949 | if (!p)
|
---|
| 950 | return NULL;
|
---|
| 951 | iptmp = OPENSSL_strdup(ipasc);
|
---|
| 952 | if (!iptmp)
|
---|
| 953 | return NULL;
|
---|
| 954 | p = iptmp + (p - ipasc);
|
---|
| 955 | *p++ = 0;
|
---|
| 956 |
|
---|
| 957 | iplen1 = a2i_ipadd(ipout, iptmp);
|
---|
| 958 |
|
---|
| 959 | if (!iplen1)
|
---|
| 960 | goto err;
|
---|
| 961 |
|
---|
| 962 | iplen2 = a2i_ipadd(ipout + iplen1, p);
|
---|
| 963 |
|
---|
| 964 | OPENSSL_free(iptmp);
|
---|
| 965 | iptmp = NULL;
|
---|
| 966 |
|
---|
| 967 | if (!iplen2 || (iplen1 != iplen2))
|
---|
| 968 | goto err;
|
---|
| 969 |
|
---|
| 970 | ret = ASN1_OCTET_STRING_new();
|
---|
| 971 | if (ret == NULL)
|
---|
| 972 | goto err;
|
---|
| 973 | if (!ASN1_OCTET_STRING_set(ret, ipout, iplen1 + iplen2))
|
---|
| 974 | goto err;
|
---|
| 975 |
|
---|
| 976 | return ret;
|
---|
| 977 |
|
---|
| 978 | err:
|
---|
| 979 | OPENSSL_free(iptmp);
|
---|
| 980 | ASN1_OCTET_STRING_free(ret);
|
---|
| 981 | return NULL;
|
---|
| 982 | }
|
---|
| 983 |
|
---|
| 984 | int a2i_ipadd(unsigned char *ipout, const char *ipasc)
|
---|
| 985 | {
|
---|
| 986 | /* If string contains a ':' assume IPv6 */
|
---|
| 987 |
|
---|
| 988 | if (strchr(ipasc, ':')) {
|
---|
| 989 | if (!ipv6_from_asc(ipout, ipasc))
|
---|
| 990 | return 0;
|
---|
| 991 | return 16;
|
---|
| 992 | } else {
|
---|
| 993 | if (!ipv4_from_asc(ipout, ipasc))
|
---|
| 994 | return 0;
|
---|
| 995 | return 4;
|
---|
| 996 | }
|
---|
| 997 | }
|
---|
| 998 |
|
---|
| 999 | static int ipv4_from_asc(unsigned char *v4, const char *in)
|
---|
| 1000 | {
|
---|
| 1001 | int a0, a1, a2, a3;
|
---|
| 1002 | if (sscanf(in, "%d.%d.%d.%d", &a0, &a1, &a2, &a3) != 4)
|
---|
| 1003 | return 0;
|
---|
| 1004 | if ((a0 < 0) || (a0 > 255) || (a1 < 0) || (a1 > 255)
|
---|
| 1005 | || (a2 < 0) || (a2 > 255) || (a3 < 0) || (a3 > 255))
|
---|
| 1006 | return 0;
|
---|
| 1007 | v4[0] = a0;
|
---|
| 1008 | v4[1] = a1;
|
---|
| 1009 | v4[2] = a2;
|
---|
| 1010 | v4[3] = a3;
|
---|
| 1011 | return 1;
|
---|
| 1012 | }
|
---|
| 1013 |
|
---|
| 1014 | typedef struct {
|
---|
| 1015 | /* Temporary store for IPV6 output */
|
---|
| 1016 | unsigned char tmp[16];
|
---|
| 1017 | /* Total number of bytes in tmp */
|
---|
| 1018 | int total;
|
---|
| 1019 | /* The position of a zero (corresponding to '::') */
|
---|
| 1020 | int zero_pos;
|
---|
| 1021 | /* Number of zeroes */
|
---|
| 1022 | int zero_cnt;
|
---|
| 1023 | } IPV6_STAT;
|
---|
| 1024 |
|
---|
| 1025 | static int ipv6_from_asc(unsigned char *v6, const char *in)
|
---|
| 1026 | {
|
---|
| 1027 | IPV6_STAT v6stat;
|
---|
| 1028 | v6stat.total = 0;
|
---|
| 1029 | v6stat.zero_pos = -1;
|
---|
| 1030 | v6stat.zero_cnt = 0;
|
---|
| 1031 | /*
|
---|
| 1032 | * Treat the IPv6 representation as a list of values separated by ':'.
|
---|
| 1033 | * The presence of a '::' will parse as one, two or three zero length
|
---|
| 1034 | * elements.
|
---|
| 1035 | */
|
---|
| 1036 | if (!CONF_parse_list(in, ':', 0, ipv6_cb, &v6stat))
|
---|
| 1037 | return 0;
|
---|
| 1038 |
|
---|
| 1039 | /* Now for some sanity checks */
|
---|
| 1040 |
|
---|
| 1041 | if (v6stat.zero_pos == -1) {
|
---|
| 1042 | /* If no '::' must have exactly 16 bytes */
|
---|
| 1043 | if (v6stat.total != 16)
|
---|
| 1044 | return 0;
|
---|
| 1045 | } else {
|
---|
| 1046 | /* If '::' must have less than 16 bytes */
|
---|
| 1047 | if (v6stat.total == 16)
|
---|
| 1048 | return 0;
|
---|
| 1049 | /* More than three zeroes is an error */
|
---|
| 1050 | if (v6stat.zero_cnt > 3)
|
---|
| 1051 | return 0;
|
---|
| 1052 | /* Can only have three zeroes if nothing else present */
|
---|
| 1053 | else if (v6stat.zero_cnt == 3) {
|
---|
| 1054 | if (v6stat.total > 0)
|
---|
| 1055 | return 0;
|
---|
| 1056 | }
|
---|
| 1057 | /* Can only have two zeroes if at start or end */
|
---|
| 1058 | else if (v6stat.zero_cnt == 2) {
|
---|
| 1059 | if ((v6stat.zero_pos != 0)
|
---|
| 1060 | && (v6stat.zero_pos != v6stat.total))
|
---|
| 1061 | return 0;
|
---|
| 1062 | } else
|
---|
| 1063 | /* Can only have one zero if *not* start or end */
|
---|
| 1064 | {
|
---|
| 1065 | if ((v6stat.zero_pos == 0)
|
---|
| 1066 | || (v6stat.zero_pos == v6stat.total))
|
---|
| 1067 | return 0;
|
---|
| 1068 | }
|
---|
| 1069 | }
|
---|
| 1070 |
|
---|
| 1071 | /* Format result */
|
---|
| 1072 |
|
---|
| 1073 | if (v6stat.zero_pos >= 0) {
|
---|
| 1074 | /* Copy initial part */
|
---|
| 1075 | memcpy(v6, v6stat.tmp, v6stat.zero_pos);
|
---|
| 1076 | /* Zero middle */
|
---|
| 1077 | memset(v6 + v6stat.zero_pos, 0, 16 - v6stat.total);
|
---|
| 1078 | /* Copy final part */
|
---|
| 1079 | if (v6stat.total != v6stat.zero_pos)
|
---|
| 1080 | memcpy(v6 + v6stat.zero_pos + 16 - v6stat.total,
|
---|
| 1081 | v6stat.tmp + v6stat.zero_pos,
|
---|
| 1082 | v6stat.total - v6stat.zero_pos);
|
---|
| 1083 | } else
|
---|
| 1084 | memcpy(v6, v6stat.tmp, 16);
|
---|
| 1085 |
|
---|
| 1086 | return 1;
|
---|
| 1087 | }
|
---|
| 1088 |
|
---|
| 1089 | static int ipv6_cb(const char *elem, int len, void *usr)
|
---|
| 1090 | {
|
---|
| 1091 | IPV6_STAT *s = usr;
|
---|
| 1092 | /* Error if 16 bytes written */
|
---|
| 1093 | if (s->total == 16)
|
---|
| 1094 | return 0;
|
---|
| 1095 | if (len == 0) {
|
---|
| 1096 | /* Zero length element, corresponds to '::' */
|
---|
| 1097 | if (s->zero_pos == -1)
|
---|
| 1098 | s->zero_pos = s->total;
|
---|
| 1099 | /* If we've already got a :: its an error */
|
---|
| 1100 | else if (s->zero_pos != s->total)
|
---|
| 1101 | return 0;
|
---|
| 1102 | s->zero_cnt++;
|
---|
| 1103 | } else {
|
---|
| 1104 | /* If more than 4 characters could be final a.b.c.d form */
|
---|
| 1105 | if (len > 4) {
|
---|
| 1106 | /* Need at least 4 bytes left */
|
---|
| 1107 | if (s->total > 12)
|
---|
| 1108 | return 0;
|
---|
| 1109 | /* Must be end of string */
|
---|
| 1110 | if (elem[len])
|
---|
| 1111 | return 0;
|
---|
| 1112 | if (!ipv4_from_asc(s->tmp + s->total, elem))
|
---|
| 1113 | return 0;
|
---|
| 1114 | s->total += 4;
|
---|
| 1115 | } else {
|
---|
| 1116 | if (!ipv6_hex(s->tmp + s->total, elem, len))
|
---|
| 1117 | return 0;
|
---|
| 1118 | s->total += 2;
|
---|
| 1119 | }
|
---|
| 1120 | }
|
---|
| 1121 | return 1;
|
---|
| 1122 | }
|
---|
| 1123 |
|
---|
| 1124 | /*
|
---|
| 1125 | * Convert a string of up to 4 hex digits into the corresponding IPv6 form.
|
---|
| 1126 | */
|
---|
| 1127 |
|
---|
| 1128 | static int ipv6_hex(unsigned char *out, const char *in, int inlen)
|
---|
| 1129 | {
|
---|
| 1130 | unsigned char c;
|
---|
| 1131 | unsigned int num = 0;
|
---|
| 1132 | int x;
|
---|
| 1133 |
|
---|
| 1134 | if (inlen > 4)
|
---|
| 1135 | return 0;
|
---|
| 1136 | while (inlen--) {
|
---|
| 1137 | c = *in++;
|
---|
| 1138 | num <<= 4;
|
---|
| 1139 | x = OPENSSL_hexchar2int(c);
|
---|
| 1140 | if (x < 0)
|
---|
| 1141 | return 0;
|
---|
| 1142 | num |= (char)x;
|
---|
| 1143 | }
|
---|
| 1144 | out[0] = num >> 8;
|
---|
| 1145 | out[1] = num & 0xff;
|
---|
| 1146 | return 1;
|
---|
| 1147 | }
|
---|
| 1148 |
|
---|
| 1149 | int X509V3_NAME_from_section(X509_NAME *nm, STACK_OF(CONF_VALUE) *dn_sk,
|
---|
| 1150 | unsigned long chtype)
|
---|
| 1151 | {
|
---|
| 1152 | CONF_VALUE *v;
|
---|
| 1153 | int i, mval, spec_char, plus_char;
|
---|
| 1154 | char *p, *type;
|
---|
| 1155 | if (!nm)
|
---|
| 1156 | return 0;
|
---|
| 1157 |
|
---|
| 1158 | for (i = 0; i < sk_CONF_VALUE_num(dn_sk); i++) {
|
---|
| 1159 | v = sk_CONF_VALUE_value(dn_sk, i);
|
---|
| 1160 | type = v->name;
|
---|
| 1161 | /*
|
---|
| 1162 | * Skip past any leading X. X: X, etc to allow for multiple instances
|
---|
| 1163 | */
|
---|
| 1164 | for (p = type; *p; p++) {
|
---|
| 1165 | #ifndef CHARSET_EBCDIC
|
---|
| 1166 | spec_char = ((*p == ':') || (*p == ',') || (*p == '.'));
|
---|
| 1167 | #else
|
---|
| 1168 | spec_char = ((*p == os_toascii[':']) || (*p == os_toascii[','])
|
---|
| 1169 | || (*p == os_toascii['.']));
|
---|
| 1170 | #endif
|
---|
| 1171 | if (spec_char) {
|
---|
| 1172 | p++;
|
---|
| 1173 | if (*p)
|
---|
| 1174 | type = p;
|
---|
| 1175 | break;
|
---|
| 1176 | }
|
---|
| 1177 | }
|
---|
| 1178 | #ifndef CHARSET_EBCDIC
|
---|
| 1179 | plus_char = (*type == '+');
|
---|
| 1180 | #else
|
---|
| 1181 | plus_char = (*type == os_toascii['+']);
|
---|
| 1182 | #endif
|
---|
| 1183 | if (plus_char) {
|
---|
| 1184 | mval = -1;
|
---|
| 1185 | type++;
|
---|
| 1186 | } else
|
---|
| 1187 | mval = 0;
|
---|
| 1188 | if (!X509_NAME_add_entry_by_txt(nm, type, chtype,
|
---|
| 1189 | (unsigned char *)v->value, -1, -1,
|
---|
| 1190 | mval))
|
---|
| 1191 | return 0;
|
---|
| 1192 |
|
---|
| 1193 | }
|
---|
| 1194 | return 1;
|
---|
| 1195 | }
|
---|