Internal TLS: Fix X.509 name handling to use sequency of attributes
There may be more than one attribute of same type (e.g., multiple DC attributes), so the code needs to be able to handle that. Replace the fixed structure with an array of attributes.
This commit is contained in:
Jouni Malinen
Jouni Malinen
parent
969b403fa7
commit
32b752ef8f
2 changed files with 110 additions and 95 deletions
176
src/tls/x509v3.c
176
src/tls/x509v3.c
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@ -22,16 +22,15 @@
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static void x509_free_name(struct x509_name *name)
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{
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os_free(name->dc);
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os_free(name->cn);
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os_free(name->c);
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os_free(name->l);
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os_free(name->st);
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os_free(name->o);
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os_free(name->ou);
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size_t i;
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for (i = 0; i < name->num_attr; i++) {
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os_free(name->attr[i].value);
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name->attr[i].value = NULL;
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name->attr[i].type = X509_NAME_ATTR_NOT_USED;
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}
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name->num_attr = 0;
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os_free(name->email);
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name->dc = NULL;
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name->cn = name->c = name->l = name->st = name->o = name->ou = NULL;
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name->email = NULL;
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os_free(name->alt_email);
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@ -154,6 +153,7 @@ static int x509_str_compare(const char *a, const char *b)
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int x509_name_compare(struct x509_name *a, struct x509_name *b)
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{
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int res;
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size_t i;
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if (!a && b)
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return -1;
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@ -161,28 +161,20 @@ int x509_name_compare(struct x509_name *a, struct x509_name *b)
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return 1;
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if (!a && !b)
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return 0;
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if (a->num_attr < b->num_attr)
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return -1;
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if (a->num_attr > b->num_attr)
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return 1;
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res = x509_str_compare(a->dc, b->dc);
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if (res)
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return res;
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res = x509_str_compare(a->cn, b->cn);
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if (res)
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return res;
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res = x509_str_compare(a->c, b->c);
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if (res)
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return res;
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res = x509_str_compare(a->l, b->l);
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if (res)
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return res;
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res = x509_str_compare(a->st, b->st);
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if (res)
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return res;
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res = x509_str_compare(a->o, b->o);
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if (res)
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return res;
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res = x509_str_compare(a->ou, b->ou);
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for (i = 0; i < a->num_attr; i++) {
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if (a->attr[i].type < b->attr[i].type)
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return -1;
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if (a->attr[i].type > b->attr[i].type)
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return -1;
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res = x509_str_compare(a->attr[i].value, b->attr[i].value);
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if (res)
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return res;
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}
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res = x509_str_compare(a->email, b->email);
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if (res)
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return res;
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@ -309,7 +301,7 @@ static int x509_parse_name(const u8 *buf, size_t len, struct x509_name *name,
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struct asn1_hdr hdr;
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const u8 *pos, *end, *set_pos, *set_end, *seq_pos, *seq_end;
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struct asn1_oid oid;
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char **fieldp;
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char *val;
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/*
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* Name ::= CHOICE { RDNSequence }
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@ -339,6 +331,8 @@ static int x509_parse_name(const u8 *buf, size_t len, struct x509_name *name,
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end = *next = pos + hdr.length;
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while (pos < end) {
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enum x509_name_attr_type type;
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if (asn1_get_next(pos, end - pos, &hdr) < 0 ||
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hdr.class != ASN1_CLASS_UNIVERSAL ||
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hdr.tag != ASN1_TAG_SET) {
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@ -386,34 +380,34 @@ static int x509_parse_name(const u8 *buf, size_t len, struct x509_name *name,
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* pseudonym, generation qualifier.
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* MUST: domainComponent (RFC 2247).
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*/
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fieldp = NULL;
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type = X509_NAME_ATTR_NOT_USED;
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if (oid.len == 4 &&
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oid.oid[0] == 2 && oid.oid[1] == 5 && oid.oid[2] == 4) {
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/* id-at ::= 2.5.4 */
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switch (oid.oid[3]) {
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case 3:
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/* commonName */
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fieldp = &name->cn;
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type = X509_NAME_ATTR_CN;
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break;
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case 6:
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/* countryName */
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fieldp = &name->c;
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type = X509_NAME_ATTR_C;
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break;
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case 7:
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/* localityName */
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fieldp = &name->l;
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type = X509_NAME_ATTR_L;
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break;
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case 8:
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/* stateOrProvinceName */
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fieldp = &name->st;
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type = X509_NAME_ATTR_ST;
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break;
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case 10:
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/* organizationName */
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fieldp = &name->o;
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type = X509_NAME_ATTR_O;
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break;
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case 11:
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/* organizationalUnitName */
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fieldp = &name->ou;
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type = X509_NAME_ATTR_OU;
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break;
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}
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} else if (oid.len == 7 &&
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@ -422,17 +416,25 @@ static int x509_parse_name(const u8 *buf, size_t len, struct x509_name *name,
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oid.oid[4] == 1 && oid.oid[5] == 9 &&
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oid.oid[6] == 1) {
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/* 1.2.840.113549.1.9.1 - e-mailAddress */
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fieldp = &name->email;
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os_free(name->email);
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name->email = os_malloc(hdr.length + 1);
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if (name->email == NULL) {
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x509_free_name(name);
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return -1;
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}
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os_memcpy(name->email, hdr.payload, hdr.length);
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name->email[hdr.length] = '\0';
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continue;
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} else if (oid.len == 7 &&
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oid.oid[0] == 0 && oid.oid[1] == 9 &&
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oid.oid[2] == 2342 && oid.oid[3] == 19200300 &&
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oid.oid[4] == 100 && oid.oid[5] == 1 &&
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oid.oid[6] == 25) {
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/* 0.9.2342.19200300.100.1.25 - domainComponent */
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fieldp = &name->dc;
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type = X509_NAME_ATTR_DC;
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}
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if (fieldp == NULL) {
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if (type == X509_NAME_ATTR_NOT_USED) {
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wpa_hexdump(MSG_DEBUG, "X509: Unrecognized OID",
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(u8 *) oid.oid,
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oid.len * sizeof(oid.oid[0]));
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@ -441,27 +443,60 @@ static int x509_parse_name(const u8 *buf, size_t len, struct x509_name *name,
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continue;
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}
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os_free(*fieldp);
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*fieldp = os_malloc(hdr.length + 1);
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if (*fieldp == NULL) {
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if (name->num_attr == X509_MAX_NAME_ATTRIBUTES) {
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wpa_printf(MSG_INFO, "X509: Too many Name attributes");
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x509_free_name(name);
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return -1;
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}
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os_memcpy(*fieldp, hdr.payload, hdr.length);
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(*fieldp)[hdr.length] = '\0';
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if (os_strlen(*fieldp) != hdr.length) {
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val = os_malloc(hdr.length + 1);
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if (val == NULL) {
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x509_free_name(name);
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return -1;
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}
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os_memcpy(val, hdr.payload, hdr.length);
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val[hdr.length] = '\0';
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if (os_strlen(val) != hdr.length) {
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wpa_printf(MSG_INFO, "X509: Reject certificate with "
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"embedded NUL byte in a string (%s[NUL])",
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*fieldp);
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val);
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x509_free_name(name);
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return -1;
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}
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name->attr[name->num_attr].type = type;
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name->attr[name->num_attr].value = val;
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name->num_attr++;
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}
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return 0;
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}
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static char * x509_name_attr_str(enum x509_name_attr_type type)
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{
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switch (type) {
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case X509_NAME_ATTR_NOT_USED:
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return "[N/A]";
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case X509_NAME_ATTR_DC:
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return "DC";
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case X509_NAME_ATTR_CN:
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return "CN";
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case X509_NAME_ATTR_C:
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return "C";
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case X509_NAME_ATTR_L:
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return "L";
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case X509_NAME_ATTR_ST:
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return "ST";
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case X509_NAME_ATTR_O:
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return "O";
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case X509_NAME_ATTR_OU:
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return "OU";
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}
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return "?";
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}
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/**
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* x509_name_string - Convert an X.509 certificate name into a string
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* @name: Name to convert
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@ -472,6 +507,7 @@ void x509_name_string(struct x509_name *name, char *buf, size_t len)
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{
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char *pos, *end;
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int ret;
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size_t i;
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if (len == 0)
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return;
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@ -479,52 +515,20 @@ void x509_name_string(struct x509_name *name, char *buf, size_t len)
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pos = buf;
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end = buf + len;
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if (name->c) {
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ret = os_snprintf(pos, end - pos, "C=%s, ", name->c);
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if (ret < 0 || ret >= end - pos)
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goto done;
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pos += ret;
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}
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if (name->st) {
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ret = os_snprintf(pos, end - pos, "ST=%s, ", name->st);
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if (ret < 0 || ret >= end - pos)
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goto done;
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pos += ret;
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}
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if (name->l) {
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ret = os_snprintf(pos, end - pos, "L=%s, ", name->l);
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if (ret < 0 || ret >= end - pos)
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goto done;
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pos += ret;
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}
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if (name->o) {
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ret = os_snprintf(pos, end - pos, "O=%s, ", name->o);
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if (ret < 0 || ret >= end - pos)
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goto done;
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pos += ret;
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}
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if (name->ou) {
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ret = os_snprintf(pos, end - pos, "OU=%s, ", name->ou);
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if (ret < 0 || ret >= end - pos)
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goto done;
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pos += ret;
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}
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if (name->cn) {
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ret = os_snprintf(pos, end - pos, "CN=%s, ", name->cn);
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if (ret < 0 || ret >= end - pos)
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goto done;
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pos += ret;
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}
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if (name->dc) {
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ret = os_snprintf(pos, end - pos, "DC=%s, ", name->dc);
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for (i = 0; i < name->num_attr; i++) {
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ret = os_snprintf(pos, end - pos, "%s=%s, ",
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x509_name_attr_str(name->attr[i].type),
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name->attr[i].value);
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if (ret < 0 || ret >= end - pos)
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goto done;
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pos += ret;
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}
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if (pos > buf + 1 && pos[-1] == ' ' && pos[-2] == ',') {
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*pos-- = '\0';
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*pos-- = '\0';
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pos--;
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*pos = '\0';
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pos--;
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*pos = '\0';
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}
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if (name->email) {
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@ -21,14 +21,25 @@ struct x509_algorithm_identifier {
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struct asn1_oid oid;
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};
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struct x509_name_attr {
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enum x509_name_attr_type {
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X509_NAME_ATTR_NOT_USED,
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X509_NAME_ATTR_DC,
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X509_NAME_ATTR_CN,
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X509_NAME_ATTR_C,
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X509_NAME_ATTR_L,
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X509_NAME_ATTR_ST,
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X509_NAME_ATTR_O,
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X509_NAME_ATTR_OU
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} type;
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char *value;
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};
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#define X509_MAX_NAME_ATTRIBUTES 20
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struct x509_name {
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char *dc; /* domainComponent */
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char *cn; /* commonName */
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char *c; /* countryName */
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char *l; /* localityName */
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char *st; /* stateOrProvinceName */
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char *o; /* organizationName */
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char *ou; /* organizationalUnitName */
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struct x509_name_attr attr[X509_MAX_NAME_ATTRIBUTES];
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size_t num_attr;
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char *email; /* emailAddress */
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/* from alternative name extension */
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