/* * Copyright (C) 2009 Tobias Brunner * Copyright (C) 2005-2008 Martin Willi * Copyright (C) 2005 Jan Hutter * Hochschule fuer Technik Rapperswil * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. See . * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * $Id: identification.c 5036 2009-03-26 13:25:46Z martin $ */ #define _GNU_SOURCE #include #include #include #include #include #include #include "identification.h" #include #include ENUM_BEGIN(id_match_names, ID_MATCH_NONE, ID_MATCH_MAX_WILDCARDS, "MATCH_NONE", "MATCH_ANY", "MATCH_MAX_WILDCARDS"); ENUM_NEXT(id_match_names, ID_MATCH_PERFECT, ID_MATCH_PERFECT, ID_MATCH_MAX_WILDCARDS, "MATCH_PERFECT"); ENUM_END(id_match_names, ID_MATCH_PERFECT); ENUM_BEGIN(id_type_names, ID_ANY, ID_KEY_ID, "ID_ANY", "ID_IPV4_ADDR", "ID_FQDN", "ID_RFC822_ADDR", "ID_IPV4_ADDR_SUBNET", "ID_IPV6_ADDR", "ID_IPV6_ADDR_SUBNET", "ID_IPV4_ADDR_RANGE", "ID_IPV6_ADDR_RANGE", "ID_DER_ASN1_DN", "ID_DER_ASN1_GN", "ID_KEY_ID"); ENUM_NEXT(id_type_names, ID_DER_ASN1_GN_URI, ID_CERT_DER_SHA1, ID_KEY_ID, "ID_DER_ASN1_GN_URI", "ID_PUBKEY_INFO_SHA1", "ID_PUBKEY_SHA1", "ID_CERT_DER_SHA1"); ENUM_END(id_type_names, ID_CERT_DER_SHA1); /** * X.501 acronyms for well known object identifiers (OIDs) */ static u_char oid_ND[] = { 0x02, 0x82, 0x06, 0x01, 0x0A, 0x07, 0x14 }; static u_char oid_UID[] = { 0x09, 0x92, 0x26, 0x89, 0x93, 0xF2, 0x2C, 0x64, 0x01, 0x01 }; static u_char oid_DC[] = { 0x09, 0x92, 0x26, 0x89, 0x93, 0xF2, 0x2C, 0x64, 0x01, 0x19 }; static u_char oid_CN[] = { 0x55, 0x04, 0x03 }; static u_char oid_S[] = { 0x55, 0x04, 0x04 }; static u_char oid_SN[] = { 0x55, 0x04, 0x05 }; static u_char oid_C[] = { 0x55, 0x04, 0x06 }; static u_char oid_L[] = { 0x55, 0x04, 0x07 }; static u_char oid_ST[] = { 0x55, 0x04, 0x08 }; static u_char oid_O[] = { 0x55, 0x04, 0x0A }; static u_char oid_OU[] = { 0x55, 0x04, 0x0B }; static u_char oid_T[] = { 0x55, 0x04, 0x0C }; static u_char oid_D[] = { 0x55, 0x04, 0x0D }; static u_char oid_N[] = { 0x55, 0x04, 0x29 }; static u_char oid_G[] = { 0x55, 0x04, 0x2A }; static u_char oid_I[] = { 0x55, 0x04, 0x2B }; static u_char oid_ID[] = { 0x55, 0x04, 0x2D }; static u_char oid_EN[] = { 0x60, 0x86, 0x48, 0x01, 0x86, 0xF8, 0x42, 0x03, 0x01, 0x03 }; static u_char oid_E[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x09, 0x01 }; static u_char oid_UN[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x09, 0x02 }; static u_char oid_TCGID[] = { 0x2B, 0x06, 0x01, 0x04, 0x01, 0x89, 0x31, 0x01, 0x01, 0x02, 0x02, 0x4B }; /** * coding of X.501 distinguished name */ typedef struct { const u_char *name; chunk_t oid; u_char type; } x501rdn_t; static const x501rdn_t x501rdns[] = { {"ND", {oid_ND, 7}, ASN1_PRINTABLESTRING}, {"UID", {oid_UID, 10}, ASN1_PRINTABLESTRING}, {"DC", {oid_DC, 10}, ASN1_PRINTABLESTRING}, {"CN", {oid_CN, 3}, ASN1_PRINTABLESTRING}, {"S", {oid_S, 3}, ASN1_PRINTABLESTRING}, {"SN", {oid_SN, 3}, ASN1_PRINTABLESTRING}, {"serialNumber", {oid_SN, 3}, ASN1_PRINTABLESTRING}, {"C", {oid_C, 3}, ASN1_PRINTABLESTRING}, {"L", {oid_L, 3}, ASN1_PRINTABLESTRING}, {"ST", {oid_ST, 3}, ASN1_PRINTABLESTRING}, {"O", {oid_O, 3}, ASN1_PRINTABLESTRING}, {"OU", {oid_OU, 3}, ASN1_PRINTABLESTRING}, {"T", {oid_T, 3}, ASN1_PRINTABLESTRING}, {"D", {oid_D, 3}, ASN1_PRINTABLESTRING}, {"N", {oid_N, 3}, ASN1_PRINTABLESTRING}, {"G", {oid_G, 3}, ASN1_PRINTABLESTRING}, {"I", {oid_I, 3}, ASN1_PRINTABLESTRING}, {"ID", {oid_ID, 3}, ASN1_PRINTABLESTRING}, {"EN", {oid_EN, 10}, ASN1_PRINTABLESTRING}, {"employeeNumber", {oid_EN, 10}, ASN1_PRINTABLESTRING}, {"E", {oid_E, 9}, ASN1_IA5STRING}, {"Email", {oid_E, 9}, ASN1_IA5STRING}, {"emailAddress", {oid_E, 9}, ASN1_IA5STRING}, {"UN", {oid_UN, 9}, ASN1_IA5STRING}, {"unstructuredName",{oid_UN, 9}, ASN1_IA5STRING}, {"TCGID", {oid_TCGID, 12}, ASN1_PRINTABLESTRING} }; #define X501_RDN_ROOF 26 /** * maximum number of RDNs in atodn() */ #define RDN_MAX 20 typedef struct private_identification_t private_identification_t; /** * Private data of an identification_t object. */ struct private_identification_t { /** * Public interface. */ identification_t public; /** * Encoded representation of this ID. */ chunk_t encoded; /** * Type of this ID. */ id_type_t type; }; static private_identification_t *identification_create(void); /** * updates a chunk (!????) * TODO: We should reconsider this stuff, its not really clear */ static void update_chunk(chunk_t *ch, int n) { n = (n > -1 && n < (int)ch->len)? n : (int)ch->len-1; ch->ptr += n; ch->len -= n; } /** * Remove any malicious characters from a chunk. We are very restrictive, but * whe use these strings only to present it to the user. */ static chunk_t sanitize_chunk(chunk_t chunk) { char *pos; chunk_t clone = chunk_clone(chunk); for (pos = clone.ptr; pos < (char*)(clone.ptr + clone.len); pos++) { switch (*pos) { case '\0': case ' ': case '*': case '-': case '.': case '/': case '0' ... '9': case ':': case '=': case '@': case 'A' ... 'Z': case '_': case 'a' ... 'z': break; default: *pos = '?'; } } return clone; } /** * Pointer is set to the first RDN in a DN */ static bool init_rdn(chunk_t dn, chunk_t *rdn, chunk_t *attribute, bool *next) { *rdn = chunk_empty; *attribute = chunk_empty; /* a DN is a SEQUENCE OF RDNs */ if (*dn.ptr != ASN1_SEQUENCE) { /* DN is not a SEQUENCE */ return FALSE; } rdn->len = asn1_length(&dn); if (rdn->len == ASN1_INVALID_LENGTH) { /* Invalid RDN length */ return FALSE; } rdn->ptr = dn.ptr; /* are there any RDNs ? */ *next = rdn->len > 0; return TRUE; } /** * Fetches the next RDN in a DN */ static bool get_next_rdn(chunk_t *rdn, chunk_t * attribute, chunk_t *oid, chunk_t *value, asn1_t *type, bool *next) { chunk_t body; /* initialize return values */ *oid = chunk_empty; *value = chunk_empty; /* if all attributes have been parsed, get next rdn */ if (attribute->len <= 0) { /* an RDN is a SET OF attributeTypeAndValue */ if (*rdn->ptr != ASN1_SET) { /* RDN is not a SET */ return FALSE; } attribute->len = asn1_length(rdn); if (attribute->len == ASN1_INVALID_LENGTH) { /* Invalid attribute length */ return FALSE; } attribute->ptr = rdn->ptr; /* advance to start of next RDN */ rdn->ptr += attribute->len; rdn->len -= attribute->len; } /* an attributeTypeAndValue is a SEQUENCE */ if (*attribute->ptr != ASN1_SEQUENCE) { /* attributeTypeAndValue is not a SEQUENCE */ return FALSE; } /* extract the attribute body */ body.len = asn1_length(attribute); if (body.len == ASN1_INVALID_LENGTH) { /* Invalid attribute body length */ return FALSE; } body.ptr = attribute->ptr; /* advance to start of next attribute */ attribute->ptr += body.len; attribute->len -= body.len; /* attribute type is an OID */ if (*body.ptr != ASN1_OID) { /* attributeType is not an OID */ return FALSE; } /* extract OID */ oid->len = asn1_length(&body); if (oid->len == ASN1_INVALID_LENGTH) { /* Invalid attribute OID length */ return FALSE; } oid->ptr = body.ptr; /* advance to the attribute value */ body.ptr += oid->len; body.len -= oid->len; /* extract string type */ *type = *body.ptr; /* extract string value */ value->len = asn1_length(&body); if (value->len == ASN1_INVALID_LENGTH) { /* Invalid attribute string length */ return FALSE; } value->ptr = body.ptr; /* are there any RDNs left? */ *next = rdn->len > 0 || attribute->len > 0; return TRUE; } /** * Parses an ASN.1 distinguished name int its OID/value pairs */ static bool dntoa(chunk_t dn, chunk_t *str) { chunk_t rdn, oid, attribute, value, proper; asn1_t type; int oid_code; bool next; bool first = TRUE; if (!init_rdn(dn, &rdn, &attribute, &next)) { return FALSE; } while (next) { if (!get_next_rdn(&rdn, &attribute, &oid, &value, &type, &next)) { return FALSE; } if (first) { /* first OID/value pair */ first = FALSE; } else { /* separate OID/value pair by a comma */ update_chunk(str, snprintf(str->ptr,str->len,", ")); } /* print OID */ oid_code = asn1_known_oid(oid); if (oid_code == OID_UNKNOWN) { update_chunk(str, snprintf(str->ptr,str->len,"0x#B", &oid)); } else { update_chunk(str, snprintf(str->ptr,str->len,"%s", oid_names[oid_code].name)); } /* print value */ proper = sanitize_chunk(value); update_chunk(str, snprintf(str->ptr,str->len,"=%.*s", (int)proper.len, proper.ptr)); chunk_free(&proper); } return TRUE; } /** * compare two distinguished names by * comparing the individual RDNs */ static bool same_dn(chunk_t a, chunk_t b) { chunk_t rdn_a, rdn_b, attribute_a, attribute_b; chunk_t oid_a, oid_b, value_a, value_b; asn1_t type_a, type_b; bool next_a, next_b; /* same lengths for the DNs */ if (a.len != b.len) { return FALSE; } /* try a binary comparison first */ if (memeq(a.ptr, b.ptr, b.len)) { return TRUE; } /* initialize DN parsing */ if (!init_rdn(a, &rdn_a, &attribute_a, &next_a) || !init_rdn(b, &rdn_b, &attribute_b, &next_b)) { return FALSE; } /* fetch next RDN pair */ while (next_a && next_b) { /* parse next RDNs and check for errors */ if (!get_next_rdn(&rdn_a, &attribute_a, &oid_a, &value_a, &type_a, &next_a) || !get_next_rdn(&rdn_b, &attribute_b, &oid_b, &value_b, &type_b, &next_b)) { return FALSE; } /* OIDs must agree */ if (oid_a.len != oid_b.len || !memeq(oid_a.ptr, oid_b.ptr, oid_b.len)) { return FALSE; } /* same lengths for values */ if (value_a.len != value_b.len) { return FALSE; } /* printableStrings and email RDNs require uppercase comparison */ if (type_a == type_b && (type_a == ASN1_PRINTABLESTRING || (type_a == ASN1_IA5STRING && asn1_known_oid(oid_a) == OID_PKCS9_EMAIL))) { if (strncasecmp(value_a.ptr, value_b.ptr, value_b.len) != 0) { return FALSE; } } else { if (!strneq(value_a.ptr, value_b.ptr, value_b.len)) { return FALSE; } } } /* both DNs must have same number of RDNs */ if (next_a || next_b) { return FALSE; } /* the two DNs are equal! */ return TRUE; } /** * compare two distinguished names by comparing the individual RDNs. * A single'*' character designates a wildcard RDN in DN b. * TODO: Add support for different RDN order in DN !! */ bool match_dn(chunk_t a, chunk_t b, int *wildcards) { chunk_t rdn_a, rdn_b, attribute_a, attribute_b; chunk_t oid_a, oid_b, value_a, value_b; asn1_t type_a, type_b; bool next_a, next_b; /* initialize wildcard counter */ *wildcards = 0; /* initialize DN parsing */ if (!init_rdn(a, &rdn_a, &attribute_a, &next_a) || !init_rdn(b, &rdn_b, &attribute_b, &next_b)) { return FALSE; } /* fetch next RDN pair */ while (next_a && next_b) { /* parse next RDNs and check for errors */ if (!get_next_rdn(&rdn_a, &attribute_a, &oid_a, &value_a, &type_a, &next_a) || !get_next_rdn(&rdn_b, &attribute_b, &oid_b, &value_b, &type_b, &next_b)) { return FALSE; } /* OIDs must agree */ if (oid_a.len != oid_b.len || memcmp(oid_a.ptr, oid_b.ptr, oid_b.len) != 0) { return FALSE; } /* does rdn_b contain a wildcard? */ if (value_b.len == 1 && *value_b.ptr == '*') { (*wildcards)++; continue; } /* same lengths for values */ if (value_a.len != value_b.len) { return FALSE; } /* printableStrings and email RDNs require uppercase comparison */ if (type_a == type_b && (type_a == ASN1_PRINTABLESTRING || (type_a == ASN1_IA5STRING && asn1_known_oid(oid_a) == OID_PKCS9_EMAIL))) { if (strncasecmp(value_a.ptr, value_b.ptr, value_b.len) != 0) { return FALSE; } } else { if (!strneq(value_a.ptr, value_b.ptr, value_b.len)) { return FALSE; } } } /* both DNs must have same number of RDNs */ if (next_a || next_b) { return FALSE; } /* the two DNs match! */ *wildcards = min(*wildcards, ID_MATCH_ONE_WILDCARD - ID_MATCH_MAX_WILDCARDS); return TRUE; } /** * Converts an LDAP-style human-readable ASCII-encoded * ASN.1 distinguished name into binary DER-encoded format */ static status_t atodn(char *src, chunk_t *dn) { /* finite state machine for atodn */ typedef enum { SEARCH_OID = 0, READ_OID = 1, SEARCH_NAME = 2, READ_NAME = 3, UNKNOWN_OID = 4 } state_t; chunk_t oid = chunk_empty; chunk_t name = chunk_empty; chunk_t rdns[RDN_MAX]; int rdn_count = 0; int dn_len = 0; int whitespace = 0; int i = 0; asn1_t rdn_type; state_t state = SEARCH_OID; status_t status = SUCCESS; do { switch (state) { case SEARCH_OID: if (*src != ' ' && *src != '/' && *src != ',') { oid.ptr = src; oid.len = 1; state = READ_OID; } break; case READ_OID: if (*src != ' ' && *src != '=') { oid.len++; } else { for (i = 0; i < X501_RDN_ROOF; i++) { if (strlen(x501rdns[i].name) == oid.len && strncasecmp(x501rdns[i].name, oid.ptr, oid.len) == 0) { break; /* found a valid OID */ } } if (i == X501_RDN_ROOF) { status = NOT_SUPPORTED; state = UNKNOWN_OID; break; } /* reset oid and change state */ oid = chunk_empty; state = SEARCH_NAME; } break; case SEARCH_NAME: if (*src != ' ' && *src != '=') { name.ptr = src; name.len = 1; whitespace = 0; state = READ_NAME; } break; case READ_NAME: if (*src != ',' && *src != '/' && *src != '\0') { name.len++; if (*src == ' ') whitespace++; else whitespace = 0; } else { name.len -= whitespace; rdn_type = (x501rdns[i].type == ASN1_PRINTABLESTRING && !asn1_is_printablestring(name)) ? ASN1_T61STRING : x501rdns[i].type; if (rdn_count < RDN_MAX) { rdns[rdn_count] = asn1_wrap(ASN1_SET, "m", asn1_wrap(ASN1_SEQUENCE, "mm", asn1_wrap(ASN1_OID, "c", x501rdns[i].oid), asn1_wrap(rdn_type, "c", name) ) ); dn_len += rdns[rdn_count++].len; } else { status = OUT_OF_RES; } /* reset name and change state */ name = chunk_empty; state = SEARCH_OID; } break; case UNKNOWN_OID: break; } } while (*src++ != '\0'); /* build the distinguished name sequence */ { int i; u_char *pos = asn1_build_object(dn, ASN1_SEQUENCE, dn_len); for (i = 0; i < rdn_count; i++) { memcpy(pos, rdns[i].ptr, rdns[i].len); pos += rdns[i].len; free(rdns[i].ptr); } } if (status != SUCCESS) { free(dn->ptr); *dn = chunk_empty; } return status; } /** * Implementation of identification_t.get_encoding. */ static chunk_t get_encoding(private_identification_t *this) { return this->encoded; } /** * Implementation of identification_t.get_type. */ static id_type_t get_type(private_identification_t *this) { return this->type; } /** * Implementation of identification_t.contains_wildcards fro ID_DER_ASN1_DN. */ static bool contains_wildcards_dn(private_identification_t *this) { chunk_t rdn, attribute; chunk_t oid, value; asn1_t type; bool next; if (!init_rdn(this->encoded, &rdn, &attribute, &next)) { return FALSE; } /* fetch next RDN */ while (next) { /* parse next RDN and check for errors */ if (!get_next_rdn(&rdn, &attribute, &oid, &value, &type, &next)) { return FALSE; } /* check if RDN is a wildcard */ if (value.len == 1 && *value.ptr == '*') { return TRUE; } } return FALSE; } /** * Implementation of identification_t.contains_wildcards. */ static bool contains_wildcards(private_identification_t *this) { switch (this->type) { case ID_ANY: return TRUE; case ID_FQDN: case ID_RFC822_ADDR: return memchr(this->encoded.ptr, '*', this->encoded.len) != NULL; case ID_DER_ASN1_DN: return contains_wildcards_dn(this); default: return FALSE; } } /** * Default implementation of identification_t.equals. * compares encoded chunk for equality. */ static bool equals_binary(private_identification_t *this, private_identification_t *other) { if (this->type == other->type) { if (this->type == ID_ANY) { return TRUE; } return chunk_equals(this->encoded, other->encoded); } return FALSE; } /** * Special implementation of identification_t.equals for ID_DER_ASN1_DN. */ static bool equals_dn(private_identification_t *this, private_identification_t *other) { return same_dn(this->encoded, other->encoded); } /** * Special implementation of identification_t.equals for RFC822 and FQDN. */ static bool equals_strcasecmp(private_identification_t *this, private_identification_t *other) { /* we do some extra sanity checks to check for invalid IDs with a * terminating null in it. */ if (this->encoded.len == other->encoded.len && memchr(this->encoded.ptr, 0, this->encoded.len) == NULL && memchr(other->encoded.ptr, 0, other->encoded.len) == NULL && strncasecmp(this->encoded.ptr, other->encoded.ptr, this->encoded.len) == 0) { return TRUE; } return FALSE; } /** * Default implementation of identification_t.matches. */ static id_match_t matches_binary(private_identification_t *this, private_identification_t *other) { if (other->type == ID_ANY) { return ID_MATCH_ANY; } if (this->type == other->type && chunk_equals(this->encoded, other->encoded)) { return ID_MATCH_PERFECT; } return ID_MATCH_NONE; } /** * Special implementation of identification_t.matches for ID_RFC822_ADDR/ID_FQDN. * Checks for a wildcard in other-string, and compares it against this-string. */ static id_match_t matches_string(private_identification_t *this, private_identification_t *other) { u_int len = other->encoded.len; if (other->type == ID_ANY) { return ID_MATCH_ANY; } if (this->type != other->type) { return ID_MATCH_NONE; } /* try a equals check first */ if (equals_strcasecmp(this, other)) { return ID_MATCH_PERFECT; } if (len == 0 || this->encoded.len < len) { return ID_MATCH_NONE; } /* check for single wildcard at the head of the string */ if (*other->encoded.ptr == '*') { /* single asterisk matches any string */ if (len-- == 1) { /* not better than ID_ANY */ return ID_MATCH_ANY; } if (strncasecmp(this->encoded.ptr + this->encoded.len - len, other->encoded.ptr + 1, len) == 0) { return ID_MATCH_ONE_WILDCARD; } } return ID_MATCH_NONE; } /** * Special implementation of identification_t.matches for ID_ANY. * ANY matches only another ANY, but nothing other */ static id_match_t matches_any(private_identification_t *this, private_identification_t *other) { if (other->type == ID_ANY) { return ID_MATCH_ANY; } return ID_MATCH_NONE; } /** * Special implementation of identification_t.matches for ID_DER_ASN1_DN */ static id_match_t matches_dn(private_identification_t *this, private_identification_t *other) { int wc; if (other->type == ID_ANY) { return ID_MATCH_ANY; } if (this->type == other->type) { if (match_dn(this->encoded, other->encoded, &wc)) { return ID_MATCH_PERFECT - wc; } } return ID_MATCH_NONE; } /** * Described in header. */ int identification_printf_hook(char *dst, size_t len, printf_hook_spec_t *spec, const void *const *args) { private_identification_t *this = *((private_identification_t**)(args[0])); char buf[BUF_LEN]; chunk_t proper, buf_chunk = chunk_from_buf(buf); if (this == NULL) { return print_in_hook(dst, len, "%*s", spec->width, "(null)"); } switch (this->type) { case ID_ANY: snprintf(buf, sizeof(buf), "%%any"); break; case ID_IPV4_ADDR: if (this->encoded.len < sizeof(struct in_addr) || inet_ntop(AF_INET, this->encoded.ptr, buf, sizeof(buf)) == NULL) { snprintf(buf, sizeof(buf), "(invalid ID_IPV4_ADDR)"); } break; case ID_IPV6_ADDR: if (this->encoded.len < sizeof(struct in6_addr) || inet_ntop(AF_INET6, this->encoded.ptr, buf, INET6_ADDRSTRLEN) == NULL) { snprintf(buf, sizeof(buf), "(invalid ID_IPV6_ADDR)"); } break; case ID_FQDN: case ID_RFC822_ADDR: case ID_DER_ASN1_GN_URI: case ID_EAP: case ID_IETF_ATTR_STRING: proper = sanitize_chunk(this->encoded); snprintf(buf, sizeof(buf), "%.*s", proper.len, proper.ptr); chunk_free(&proper); break; case ID_DER_ASN1_DN: if (!dntoa(this->encoded, &buf_chunk)) { snprintf(buf, sizeof(buf), "(invalid ID_DER_ASN1_DN)"); } break; case ID_DER_ASN1_GN: snprintf(buf, sizeof(buf), "(ASN.1 general Name"); break; case ID_KEY_ID: case ID_PUBKEY_INFO_SHA1: case ID_PUBKEY_SHA1: case ID_CERT_DER_SHA1: snprintf(buf, sizeof(buf), "%#B", &this->encoded); break; default: snprintf(buf, sizeof(buf), "(unknown ID type: %d)", this->type); break; } if (spec->minus) { return print_in_hook(dst, len, "%-*s", spec->width, buf); } return print_in_hook(dst, len, "%*s", spec->width, buf); } /** * Implementation of identification_t.clone. */ static identification_t *clone_(private_identification_t *this) { private_identification_t *clone = identification_create(); clone->type = this->type; if (this->encoded.len) { clone->encoded = chunk_clone(this->encoded); } clone->public.equals = this->public.equals; clone->public.matches = this->public.matches; return &clone->public; } /** * Implementation of identification_t.destroy. */ static void destroy(private_identification_t *this) { chunk_free(&this->encoded); free(this); } /** * Generic constructor used for the other constructors. */ static private_identification_t *identification_create(void) { private_identification_t *this = malloc_thing(private_identification_t); this->public.get_encoding = (chunk_t (*) (identification_t*))get_encoding; this->public.get_type = (id_type_t (*) (identification_t*))get_type; this->public.contains_wildcards = (bool (*) (identification_t *this))contains_wildcards; this->public.clone = (identification_t* (*) (identification_t*))clone_; this->public.destroy = (void (*) (identification_t*))destroy; /* we use these as defaults, the may be overloaded for special ID types */ this->public.equals = (bool (*) (identification_t*,identification_t*))equals_binary; this->public.matches = (id_match_t (*) (identification_t*,identification_t*))matches_binary; this->encoded = chunk_empty; return this; } /* * Described in header. */ identification_t *identification_create_from_string(char *string) { private_identification_t *this = identification_create(); if (string == NULL) { string = "%any"; } if (strchr(string, '=') != NULL) { /* we interpret this as an ASCII X.501 ID_DER_ASN1_DN. * convert from LDAP style or openssl x509 -subject style to ASN.1 DN */ if (atodn(string, &this->encoded) != SUCCESS) { free(this); return NULL; } this->type = ID_DER_ASN1_DN; this->public.equals = (bool (*) (identification_t*,identification_t*))equals_dn; this->public.matches = (id_match_t (*) (identification_t*,identification_t*))matches_dn; return &this->public; } else if (strchr(string, '@') == NULL) { if (streq(string, "%any") || streq(string, "%any6") || streq(string, "0.0.0.0") || streq(string, "*") || streq(string, "::") || streq(string, "0::0")) { /* any ID will be accepted */ this->type = ID_ANY; this->public.matches = (id_match_t (*) (identification_t*,identification_t*))matches_any; return &this->public; } else { if (strchr(string, ':') == NULL) { /* try IPv4 */ struct in_addr address; chunk_t chunk = {(void*)&address, sizeof(address)}; if (inet_pton(AF_INET, string, &address) <= 0) { /* not IPv4, mostly FQDN */ this->type = ID_FQDN; this->encoded.ptr = strdup(string); this->encoded.len = strlen(string); this->public.matches = (id_match_t (*) (identification_t*,identification_t*))matches_string; this->public.equals = (bool (*) (identification_t*,identification_t*))equals_strcasecmp; return &(this->public); } this->encoded = chunk_clone(chunk); this->type = ID_IPV4_ADDR; return &(this->public); } else { /* try IPv6 */ struct in6_addr address; chunk_t chunk = {(void*)&address, sizeof(address)}; if (inet_pton(AF_INET6, string, &address) <= 0) { free(this); return NULL; } this->encoded = chunk_clone(chunk); this->type = ID_IPV6_ADDR; return &(this->public); } } } else { if (*string == '@') { if (*(string + 1) == '#') { string += 2; this->type = ID_KEY_ID; this->encoded = chunk_from_hex( chunk_create(string, strlen(string)), NULL); return &(this->public); } else { this->type = ID_FQDN; this->encoded.ptr = strdup(string + 1); this->encoded.len = strlen(string + 1); this->public.matches = (id_match_t (*) (identification_t*,identification_t*))matches_string; this->public.equals = (bool (*) (identification_t*,identification_t*))equals_strcasecmp; return &(this->public); } } else { this->type = ID_RFC822_ADDR; this->encoded.ptr = strdup(string); this->encoded.len = strlen(string); this->public.matches = (id_match_t (*) (identification_t*,identification_t*))matches_string; this->public.equals = (bool (*) (identification_t*,identification_t*))equals_strcasecmp; return &(this->public); } } } /* * Described in header. */ identification_t *identification_create_from_encoding(id_type_t type, chunk_t encoded) { private_identification_t *this = identification_create(); this->type = type; switch (type) { case ID_ANY: this->public.matches = (id_match_t (*) (identification_t*,identification_t*))matches_any; break; case ID_FQDN: case ID_RFC822_ADDR: this->public.matches = (id_match_t (*) (identification_t*,identification_t*))matches_string; this->public.equals = (bool (*) (identification_t*,identification_t*))equals_strcasecmp; break; case ID_DER_ASN1_DN: this->public.equals = (bool (*) (identification_t*,identification_t*))equals_dn; this->public.matches = (id_match_t (*) (identification_t*,identification_t*))matches_dn; break; case ID_IPV4_ADDR: case ID_IPV6_ADDR: case ID_DER_ASN1_GN: case ID_KEY_ID: case ID_DER_ASN1_GN_URI: case ID_PUBKEY_INFO_SHA1: case ID_PUBKEY_SHA1: case ID_CERT_DER_SHA1: case ID_EAP: case ID_IETF_ATTR_STRING: default: break; } /* apply encoded chunk */ if (type != ID_ANY) { this->encoded = chunk_clone(encoded); } return &(this->public); }