347 lines
8.5 KiB
C
347 lines
8.5 KiB
C
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#include <openssl/x509.h>
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#include <openssl/x509v3.h>
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#include <string.h>
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static const char *const names[] =
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{
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"a", "b", ".", "*", "@",
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".a", "a.", ".b", "b.", ".*", "*.", "*@", "@*", "a@", "@a", "b@", "..",
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"@@", "**",
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"*.com", "*com", "*.*.com", "*com", "com*", "*example.com",
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"*@example.com", "test@*.example.com",
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"example.com", "www.example.com", "test.www.example.com",
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"*.example.com", "*.www.example.com", "test.*.example.com", "www.*.com",
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"example.net", "xn--rger-koa.example.com",
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"a.example.com", "b.example.com",
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"postmaster@example.com", "Postmaster@example.com",
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"postmaster@EXAMPLE.COM",
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NULL
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};
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static const char *const exceptions[] =
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{
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"set CN: host: [*.example.com] does not match [*.example.com]",
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"set CN: host: [*.example.com] matches [a.example.com]",
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"set CN: host: [*.example.com] matches [b.example.com]",
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"set CN: host: [*.example.com] matches [www.example.com]",
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"set CN: host: [test.*.example.com] does not match [test.*.example.com]",
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"set CN: host: [test.*.example.com] matches [test.www.example.com]",
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"set CN: host: [*.www.example.com] does not match [*.www.example.com]",
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"set CN: host: [*.www.example.com] matches [test.www.example.com]",
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"set emailAddress: email: [postmaster@example.com] does not match [Postmaster@example.com]",
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"set emailAddress: email: [postmaster@EXAMPLE.COM] does not match [Postmaster@example.com]",
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"set emailAddress: email: [Postmaster@example.com] does not match [postmaster@example.com]",
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"set emailAddress: email: [Postmaster@example.com] does not match [postmaster@EXAMPLE.COM]",
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"set dnsName: host: [*.example.com] matches [www.example.com]",
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"set dnsName: host: [*.example.com] does not match [*.example.com]",
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"set dnsName: host: [*.example.com] matches [a.example.com]",
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"set dnsName: host: [*.example.com] matches [b.example.com]",
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"set dnsName: host: [*.www.example.com] matches [test.www.example.com]",
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"set dnsName: host: [*.www.example.com] does not match [*.www.example.com]",
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"set dnsName: host: [test.*.example.com] matches [test.www.example.com]",
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"set dnsName: host: [test.*.example.com] does not match [test.*.example.com]",
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"set rfc822Name: email: [postmaster@example.com] does not match [Postmaster@example.com]",
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"set rfc822Name: email: [Postmaster@example.com] does not match [postmaster@example.com]",
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"set rfc822Name: email: [Postmaster@example.com] does not match [postmaster@EXAMPLE.COM]",
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"set rfc822Name: email: [postmaster@EXAMPLE.COM] does not match [Postmaster@example.com]",
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NULL
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};
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static int is_exception(const char *msg)
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{
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const char *const *p;
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for (p = exceptions; *p; ++p)
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if (strcmp(msg, *p) == 0)
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return 1;
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return 0;
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}
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static int set_cn(X509 *crt, ...)
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{
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int ret = 0;
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X509_NAME *n = NULL;
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va_list ap;
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va_start(ap, crt);
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n = X509_NAME_new();
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if (n == NULL)
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goto out;
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while (1) {
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int nid;
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const char *name;
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nid = va_arg(ap, int);
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if (nid == 0)
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break;
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name = va_arg(ap, const char *);
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if (!X509_NAME_add_entry_by_NID(n, nid, MBSTRING_ASC,
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(unsigned char *)name,
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-1, -1, 1))
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goto out;
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}
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if (!X509_set_subject_name(crt, n))
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goto out;
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ret = 1;
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out:
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X509_NAME_free(n);
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va_end(ap);
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return ret;
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}
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/*
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int X509_add_ext(X509 *x, X509_EXTENSION *ex, int loc);
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X509_EXTENSION *X509_EXTENSION_create_by_NID(X509_EXTENSION **ex,
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int nid, int crit, ASN1_OCTET_STRING *data);
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int X509_add_ext(X509 *x, X509_EXTENSION *ex, int loc);
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*/
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static int set_altname(X509 *crt, ...)
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{
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int ret = 0;
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GENERAL_NAMES *gens = NULL;
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GENERAL_NAME *gen = NULL;
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ASN1_IA5STRING *ia5 = NULL;
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va_list ap;
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va_start(ap, crt);
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gens = sk_GENERAL_NAME_new_null();
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if (gens == NULL)
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goto out;
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while (1) {
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int type;
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const char *name;
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type = va_arg(ap, int);
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if (type == 0)
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break;
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name = va_arg(ap, const char *);
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gen = GENERAL_NAME_new();
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if (gen == NULL)
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goto out;
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ia5 = ASN1_IA5STRING_new();
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if (ia5 == NULL)
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goto out;
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if (!ASN1_STRING_set(ia5, name, -1))
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goto out;
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switch (type)
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{
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case GEN_EMAIL:
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case GEN_DNS:
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GENERAL_NAME_set0_value(gen, type, ia5);
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ia5 = NULL;
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break;
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default:
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abort();
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}
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sk_GENERAL_NAME_push(gens, gen);
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gen = NULL;
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}
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if (!X509_add1_ext_i2d(crt, NID_subject_alt_name, gens, 0, 0))
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goto out;
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ret = 1;
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out:
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ASN1_IA5STRING_free(ia5);
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GENERAL_NAME_free(gen);
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GENERAL_NAMES_free(gens);
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va_end(ap);
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return ret;
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}
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static int set_cn1(X509 *crt, const char *name)
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{
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return set_cn(crt, NID_commonName, name, 0);
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}
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static int set_cn_and_email(X509 *crt, const char *name)
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{
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return set_cn(crt, NID_commonName, name,
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NID_pkcs9_emailAddress, "dummy@example.com", 0);
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}
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static int set_cn2(X509 *crt, const char *name)
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{
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return set_cn(crt, NID_commonName, "dummy value",
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NID_commonName, name, 0);
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}
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static int set_cn3(X509 *crt, const char *name)
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{
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return set_cn(crt, NID_commonName, name,
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NID_commonName, "dummy value", 0);
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}
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static int set_email1(X509 *crt, const char *name)
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{
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return set_cn(crt, NID_pkcs9_emailAddress, name, 0);
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}
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static int set_email2(X509 *crt, const char *name)
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{
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return set_cn(crt, NID_pkcs9_emailAddress, "dummy@example.com",
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NID_pkcs9_emailAddress, name, 0);
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}
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static int set_email3(X509 *crt, const char *name)
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{
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return set_cn(crt, NID_pkcs9_emailAddress, name,
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NID_pkcs9_emailAddress, "dummy@example.com", 0);
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}
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static int set_email_and_cn(X509 *crt, const char *name)
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{
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return set_cn(crt, NID_pkcs9_emailAddress, name,
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NID_commonName, "www.example.org", 0);
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}
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static int set_altname_dns(X509 *crt, const char *name)
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{
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return set_altname(crt, GEN_DNS, name, 0);
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}
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static int set_altname_email(X509 *crt, const char *name)
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{
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return set_altname(crt, GEN_EMAIL, name, 0);
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}
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struct set_name_fn
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{
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int (*fn)(X509 *, const char *);
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const char *name;
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int host;
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int email;
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};
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static const struct set_name_fn name_fns[] =
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{
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{set_cn1, "set CN", 1, 0},
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{set_cn2, "set CN", 1, 0},
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{set_cn3, "set CN", 1, 0},
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{set_cn_and_email, "set CN", 1, 0},
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{set_email1, "set emailAddress", 0, 1},
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{set_email2, "set emailAddress", 0, 1},
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{set_email3, "set emailAddress", 0, 1},
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{set_email_and_cn, "set emailAddress", 0, 1},
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{set_altname_dns, "set dnsName", 1, 0},
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{set_altname_email, "set rfc822Name", 0, 1},
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{NULL, NULL, 0}
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};
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static X509 *make_cert()
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{
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X509 *ret = NULL;
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X509 *crt = NULL;
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X509_NAME *issuer = NULL;
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crt = X509_new();
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if (crt == NULL)
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goto out;
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if (!X509_set_version(crt, 3))
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goto out;
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ret = crt;
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crt = NULL;
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out:
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X509_NAME_free(issuer);
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return ret;
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}
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static int errors;
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static void check_message(const struct set_name_fn *fn, const char *op,
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const char *nameincert, int match, const char *name)
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{
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char msg[1024];
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if (match < 0)
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return;
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snprintf(msg, sizeof(msg), "%s: %s: [%s] %s [%s]",
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fn->name, op, nameincert,
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match ? "matches" : "does not match", name);
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if (is_exception(msg))
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return;
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puts(msg);
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++errors;
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}
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static void run_cert(X509 *crt, const char *nameincert,
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const struct set_name_fn *fn)
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{
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const char *const *pname = names;
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while (*pname)
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{
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int samename = strcasecmp(nameincert, *pname) == 0;
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size_t namelen = strlen(*pname);
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char *name = malloc(namelen);
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int match, ret;
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memcpy(name, *pname, namelen);
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ret = X509_check_host(crt, (const unsigned char *)name,
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namelen, 0);
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match = -1;
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if (fn->host)
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{
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if (ret && !samename)
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match = 1;
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if (!ret && samename)
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match = 0;
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}
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else if (ret)
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match = 1;
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check_message(fn, "host", nameincert, match, *pname);
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ret = X509_check_host(crt, (const unsigned char *)name,
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namelen, X509_CHECK_FLAG_NO_WILDCARDS);
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match = -1;
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if (fn->host)
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{
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if (ret && !samename)
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match = 1;
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if (!ret && samename)
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match = 0;
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}
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else if (ret)
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match = 1;
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check_message(fn, "host-no-wildcards",
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nameincert, match, *pname);
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ret = X509_check_email(crt, (const unsigned char *)name,
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namelen, 0);
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match = -1;
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if (fn->email)
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{
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if (ret && !samename)
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match = 1;
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if (!ret && samename && strchr(nameincert, '@') != NULL)
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match = 0;
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}
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else if (ret)
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match = 1;
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check_message(fn, "email", nameincert, match, *pname);
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++pname;
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free(name);
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}
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}
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int
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main(void)
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{
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const struct set_name_fn *pfn = name_fns;
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while (pfn->name) {
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const char *const *pname = names;
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while (*pname)
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{
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X509 *crt = make_cert();
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if (crt == NULL)
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{
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fprintf(stderr, "make_cert failed\n");
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return 1;
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}
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if (!pfn->fn(crt, *pname))
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{
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fprintf(stderr, "X509 name setting failed\n");
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return 1;
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}
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run_cert(crt, *pname, pfn);
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X509_free(crt);
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++pname;
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}
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++pfn;
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}
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return errors > 0 ? 1 : 0;
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}
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