diff options
| -rw-r--r-- | lib/libssl/src/crypto/x509v3/v3_ncons.c | 315 |
1 files changed, 15 insertions, 300 deletions
diff --git a/lib/libssl/src/crypto/x509v3/v3_ncons.c b/lib/libssl/src/crypto/x509v3/v3_ncons.c index a01dc64dd22..42e7f5a8797 100644 --- a/lib/libssl/src/crypto/x509v3/v3_ncons.c +++ b/lib/libssl/src/crypto/x509v3/v3_ncons.c @@ -1,5 +1,5 @@ /* v3_ncons.c */ -/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL +/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL * project. */ /* ==================================================================== @@ -63,22 +63,15 @@ #include <openssl/conf.h> #include <openssl/x509v3.h> -static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, - X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval); -static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, +static void *v2i_NAME_CONSTRAINTS(X509V3_EXT_METHOD *method, + X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval); +static int i2r_NAME_CONSTRAINTS(X509V3_EXT_METHOD *method, void *a, BIO *bp, int ind); -static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method, - STACK_OF(GENERAL_SUBTREE) *trees, - BIO *bp, int ind, char *name); +static int do_i2r_name_constraints(X509V3_EXT_METHOD *method, + STACK_OF(GENERAL_SUBTREE) *trees, + BIO *bp, int ind, char *name); static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip); -static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc); -static int nc_match_single(GENERAL_NAME *sub, GENERAL_NAME *gen); -static int nc_dn(X509_NAME *sub, X509_NAME *nm); -static int nc_dns(ASN1_IA5STRING *sub, ASN1_IA5STRING *dns); -static int nc_email(ASN1_IA5STRING *sub, ASN1_IA5STRING *eml); -static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base); - const X509V3_EXT_METHOD v3_name_constraints = { NID_name_constraints, 0, ASN1_ITEM_ref(NAME_CONSTRAINTS), @@ -106,8 +99,8 @@ ASN1_SEQUENCE(NAME_CONSTRAINTS) = { IMPLEMENT_ASN1_ALLOC_FUNCTIONS(GENERAL_SUBTREE) IMPLEMENT_ASN1_ALLOC_FUNCTIONS(NAME_CONSTRAINTS) -static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, - X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval) +static void *v2i_NAME_CONSTRAINTS(X509V3_EXT_METHOD *method, + X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval) { int i; CONF_VALUE tval, *val; @@ -162,8 +155,8 @@ static void *v2i_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, -static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a, - BIO *bp, int ind) +static int i2r_NAME_CONSTRAINTS(X509V3_EXT_METHOD *method, + void *a, BIO *bp, int ind) { NAME_CONSTRAINTS *ncons = a; do_i2r_name_constraints(method, ncons->permittedSubtrees, @@ -173,9 +166,9 @@ static int i2r_NAME_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a, return 1; } -static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method, - STACK_OF(GENERAL_SUBTREE) *trees, - BIO *bp, int ind, char *name) +static int do_i2r_name_constraints(X509V3_EXT_METHOD *method, + STACK_OF(GENERAL_SUBTREE) *trees, + BIO *bp, int ind, char *name) { GENERAL_SUBTREE *tree; int i; @@ -189,6 +182,7 @@ static int do_i2r_name_constraints(const X509V3_EXT_METHOD *method, print_nc_ipadd(bp, tree->base->d.ip); else GENERAL_NAME_print(bp, tree->base); + tree = sk_GENERAL_SUBTREE_value(trees, i); BIO_puts(bp, "\n"); } return 1; @@ -224,282 +218,3 @@ static int print_nc_ipadd(BIO *bp, ASN1_OCTET_STRING *ip) return 1; } -/* Check a certificate conforms to a specified set of constraints. - * Return values: - * X509_V_OK: All constraints obeyed. - * X509_V_ERR_PERMITTED_VIOLATION: Permitted subtree violation. - * X509_V_ERR_EXCLUDED_VIOLATION: Excluded subtree violation. - * X509_V_ERR_SUBTREE_MINMAX: Min or max values present and matching type. - * X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: Unsupported constraint type. - * X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: bad unsupported constraint syntax. - * X509_V_ERR_UNSUPPORTED_NAME_SYNTAX: bad or unsupported syntax of name - - */ - -int NAME_CONSTRAINTS_check(X509 *x, NAME_CONSTRAINTS *nc) - { - int r, i; - X509_NAME *nm; - - nm = X509_get_subject_name(x); - - if (X509_NAME_entry_count(nm) > 0) - { - GENERAL_NAME gntmp; - gntmp.type = GEN_DIRNAME; - gntmp.d.directoryName = nm; - - r = nc_match(&gntmp, nc); - - if (r != X509_V_OK) - return r; - - gntmp.type = GEN_EMAIL; - - - /* Process any email address attributes in subject name */ - - for (i = -1;;) - { - X509_NAME_ENTRY *ne; - i = X509_NAME_get_index_by_NID(nm, - NID_pkcs9_emailAddress, - i); - if (i == -1) - break; - ne = X509_NAME_get_entry(nm, i); - gntmp.d.rfc822Name = X509_NAME_ENTRY_get_data(ne); - if (gntmp.d.rfc822Name->type != V_ASN1_IA5STRING) - return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; - - r = nc_match(&gntmp, nc); - - if (r != X509_V_OK) - return r; - } - - } - - for (i = 0; i < sk_GENERAL_NAME_num(x->altname); i++) - { - GENERAL_NAME *gen = sk_GENERAL_NAME_value(x->altname, i); - r = nc_match(gen, nc); - if (r != X509_V_OK) - return r; - } - - return X509_V_OK; - - } - -static int nc_match(GENERAL_NAME *gen, NAME_CONSTRAINTS *nc) - { - GENERAL_SUBTREE *sub; - int i, r, match = 0; - - /* Permitted subtrees: if any subtrees exist of matching the type - * at least one subtree must match. - */ - - for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->permittedSubtrees); i++) - { - sub = sk_GENERAL_SUBTREE_value(nc->permittedSubtrees, i); - if (gen->type != sub->base->type) - continue; - if (sub->minimum || sub->maximum) - return X509_V_ERR_SUBTREE_MINMAX; - /* If we already have a match don't bother trying any more */ - if (match == 2) - continue; - if (match == 0) - match = 1; - r = nc_match_single(gen, sub->base); - if (r == X509_V_OK) - match = 2; - else if (r != X509_V_ERR_PERMITTED_VIOLATION) - return r; - } - - if (match == 1) - return X509_V_ERR_PERMITTED_VIOLATION; - - /* Excluded subtrees: must not match any of these */ - - for (i = 0; i < sk_GENERAL_SUBTREE_num(nc->excludedSubtrees); i++) - { - sub = sk_GENERAL_SUBTREE_value(nc->excludedSubtrees, i); - if (gen->type != sub->base->type) - continue; - if (sub->minimum || sub->maximum) - return X509_V_ERR_SUBTREE_MINMAX; - - r = nc_match_single(gen, sub->base); - if (r == X509_V_OK) - return X509_V_ERR_EXCLUDED_VIOLATION; - else if (r != X509_V_ERR_PERMITTED_VIOLATION) - return r; - - } - - return X509_V_OK; - - } - -static int nc_match_single(GENERAL_NAME *gen, GENERAL_NAME *base) - { - switch(base->type) - { - case GEN_DIRNAME: - return nc_dn(gen->d.directoryName, base->d.directoryName); - - case GEN_DNS: - return nc_dns(gen->d.dNSName, base->d.dNSName); - - case GEN_EMAIL: - return nc_email(gen->d.rfc822Name, base->d.rfc822Name); - - case GEN_URI: - return nc_uri(gen->d.uniformResourceIdentifier, - base->d.uniformResourceIdentifier); - - default: - return X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE; - } - - } - -/* directoryName name constraint matching. - * The canonical encoding of X509_NAME makes this comparison easy. It is - * matched if the subtree is a subset of the name. - */ - -static int nc_dn(X509_NAME *nm, X509_NAME *base) - { - /* Ensure canonical encodings are up to date. */ - if (nm->modified && i2d_X509_NAME(nm, NULL) < 0) - return X509_V_ERR_OUT_OF_MEM; - if (base->modified && i2d_X509_NAME(base, NULL) < 0) - return X509_V_ERR_OUT_OF_MEM; - if (base->canon_enclen > nm->canon_enclen) - return X509_V_ERR_PERMITTED_VIOLATION; - if (memcmp(base->canon_enc, nm->canon_enc, base->canon_enclen)) - return X509_V_ERR_PERMITTED_VIOLATION; - return X509_V_OK; - } - -static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base) - { - char *baseptr = (char *)base->data; - char *dnsptr = (char *)dns->data; - /* Empty matches everything */ - if (!*baseptr) - return X509_V_OK; - /* Otherwise can add zero or more components on the left so - * compare RHS and if dns is longer and expect '.' as preceding - * character. - */ - if (dns->length > base->length) - { - dnsptr += dns->length - base->length; - if (dnsptr[-1] != '.') - return X509_V_ERR_PERMITTED_VIOLATION; - } - - if (strcasecmp(baseptr, dnsptr)) - return X509_V_ERR_PERMITTED_VIOLATION; - - return X509_V_OK; - - } - -static int nc_email(ASN1_IA5STRING *eml, ASN1_IA5STRING *base) - { - const char *baseptr = (char *)base->data; - const char *emlptr = (char *)eml->data; - - const char *baseat = strchr(baseptr, '@'); - const char *emlat = strchr(emlptr, '@'); - if (!emlat) - return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; - /* Special case: inital '.' is RHS match */ - if (!baseat && (*baseptr == '.')) - { - if (eml->length > base->length) - { - emlptr += eml->length - base->length; - if (!strcasecmp(baseptr, emlptr)) - return X509_V_OK; - } - return X509_V_ERR_PERMITTED_VIOLATION; - } - - /* If we have anything before '@' match local part */ - - if (baseat) - { - if (baseat != baseptr) - { - if ((baseat - baseptr) != (emlat - emlptr)) - return X509_V_ERR_PERMITTED_VIOLATION; - /* Case sensitive match of local part */ - if (strncmp(baseptr, emlptr, emlat - emlptr)) - return X509_V_ERR_PERMITTED_VIOLATION; - } - /* Position base after '@' */ - baseptr = baseat + 1; - } - emlptr = emlat + 1; - /* Just have hostname left to match: case insensitive */ - if (strcasecmp(baseptr, emlptr)) - return X509_V_ERR_PERMITTED_VIOLATION; - - return X509_V_OK; - - } - -static int nc_uri(ASN1_IA5STRING *uri, ASN1_IA5STRING *base) - { - const char *baseptr = (char *)base->data; - const char *hostptr = (char *)uri->data; - const char *p = strchr(hostptr, ':'); - int hostlen; - /* Check for foo:// and skip past it */ - if (!p || (p[1] != '/') || (p[2] != '/')) - return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; - hostptr = p + 3; - - /* Determine length of hostname part of URI */ - - /* Look for a port indicator as end of hostname first */ - - p = strchr(hostptr, ':'); - /* Otherwise look for trailing slash */ - if (!p) - p = strchr(hostptr, '/'); - - if (!p) - hostlen = strlen(hostptr); - else - hostlen = p - hostptr; - - if (hostlen == 0) - return X509_V_ERR_UNSUPPORTED_NAME_SYNTAX; - - /* Special case: inital '.' is RHS match */ - if (*baseptr == '.') - { - if (hostlen > base->length) - { - p = hostptr + hostlen - base->length; - if (!strncasecmp(p, baseptr, base->length)) - return X509_V_OK; - } - return X509_V_ERR_PERMITTED_VIOLATION; - } - - if ((base->length != (int)hostlen) || strncasecmp(hostptr, baseptr, hostlen)) - return X509_V_ERR_PERMITTED_VIOLATION; - - return X509_V_OK; - - } |