--- /dev/null
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include "internal/cryptlib.h"
+#include <openssl/asn1t.h>
+#include <openssl/x509.h>
+#include "internal/x509_int.h"
+#include "internal/asn1_int.h"
+#include "x509_lcl.h"
+
+/*
+ * Maximum length of X509_NAME: much larger than anything we should
+ * ever see in practice.
+ */
+
+#define X509_NAME_MAX (1024 * 1024)
+
+static int x509_name_ex_d2i(ASN1_VALUE **val,
+ const unsigned char **in, long len,
+ const ASN1_ITEM *it,
+ int tag, int aclass, char opt, ASN1_TLC *ctx);
+
+static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out,
+ const ASN1_ITEM *it, int tag, int aclass);
+static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it);
+static void x509_name_ex_free(ASN1_VALUE **val, const ASN1_ITEM *it);
+
+static int x509_name_encode(X509_NAME *a);
+static int x509_name_canon(X509_NAME *a);
+static int asn1_string_canon(ASN1_STRING *out, const ASN1_STRING *in);
+static int i2d_name_canon(STACK_OF(STACK_OF_X509_NAME_ENTRY) * intname,
+ unsigned char **in);
+
+static int x509_name_ex_print(BIO *out, ASN1_VALUE **pval,
+ int indent,
+ const char *fname, const ASN1_PCTX *pctx);
+
+ASN1_SEQUENCE(X509_NAME_ENTRY) = {
+ ASN1_SIMPLE(X509_NAME_ENTRY, object, ASN1_OBJECT),
+ ASN1_SIMPLE(X509_NAME_ENTRY, value, ASN1_PRINTABLE)
+} ASN1_SEQUENCE_END(X509_NAME_ENTRY)
+
+IMPLEMENT_ASN1_FUNCTIONS(X509_NAME_ENTRY)
+IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME_ENTRY)
+
+/*
+ * For the "Name" type we need a SEQUENCE OF { SET OF X509_NAME_ENTRY } so
+ * declare two template wrappers for this
+ */
+
+ASN1_ITEM_TEMPLATE(X509_NAME_ENTRIES) =
+ ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SET_OF, 0, RDNS, X509_NAME_ENTRY)
+static_ASN1_ITEM_TEMPLATE_END(X509_NAME_ENTRIES)
+
+ASN1_ITEM_TEMPLATE(X509_NAME_INTERNAL) =
+ ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, Name, X509_NAME_ENTRIES)
+static_ASN1_ITEM_TEMPLATE_END(X509_NAME_INTERNAL)
+
+/*
+ * Normally that's where it would end: we'd have two nested STACK structures
+ * representing the ASN1. Unfortunately X509_NAME uses a completely different
+ * form and caches encodings so we have to process the internal form and
+ * convert to the external form.
+ */
+
+static const ASN1_EXTERN_FUNCS x509_name_ff = {
+ NULL,
+ x509_name_ex_new,
+ x509_name_ex_free,
+ 0, /* Default clear behaviour is OK */
+ x509_name_ex_d2i,
+ x509_name_ex_i2d,
+ x509_name_ex_print
+};
+
+IMPLEMENT_EXTERN_ASN1(X509_NAME, V_ASN1_SEQUENCE, x509_name_ff)
+
+IMPLEMENT_ASN1_FUNCTIONS(X509_NAME)
+
+IMPLEMENT_ASN1_DUP_FUNCTION(X509_NAME)
+
+static int x509_name_ex_new(ASN1_VALUE **val, const ASN1_ITEM *it)
+{
+ X509_NAME *ret = OPENSSL_zalloc(sizeof(*ret));
+
+ if (ret == NULL)
+ goto memerr;
+ if ((ret->entries = sk_X509_NAME_ENTRY_new_null()) == NULL)
+ goto memerr;
+ if ((ret->bytes = BUF_MEM_new()) == NULL)
+ goto memerr;
+ ret->modified = 1;
+ *val = (ASN1_VALUE *)ret;
+ return 1;
+
+ memerr:
+ ASN1err(ASN1_F_X509_NAME_EX_NEW, ERR_R_MALLOC_FAILURE);
+ if (ret) {
+ sk_X509_NAME_ENTRY_free(ret->entries);
+ OPENSSL_free(ret);
+ }
+ return 0;
+}
+
+static void x509_name_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
+{
+ X509_NAME *a;
+
+ if (!pval || !*pval)
+ return;
+ a = (X509_NAME *)*pval;
+
+ BUF_MEM_free(a->bytes);
+ sk_X509_NAME_ENTRY_pop_free(a->entries, X509_NAME_ENTRY_free);
+ OPENSSL_free(a->canon_enc);
+ OPENSSL_free(a);
+ *pval = NULL;
+}
+
+static void name_entry_stack_free(STACK_OF(X509_NAME_ENTRY) *ents)
+{
+ sk_X509_NAME_ENTRY_pop_free(ents, X509_NAME_ENTRY_free);
+}
+
+static int x509_name_ex_d2i(ASN1_VALUE **val,
+ const unsigned char **in, long len,
+ const ASN1_ITEM *it, int tag, int aclass,
+ char opt, ASN1_TLC *ctx)
+{
+ const unsigned char *p = *in, *q;
+ union {
+ STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
+ ASN1_VALUE *a;
+ } intname = {
+ NULL
+ };
+ union {
+ X509_NAME *x;
+ ASN1_VALUE *a;
+ } nm = {
+ NULL
+ };
+ int i, j, ret;
+ STACK_OF(X509_NAME_ENTRY) *entries;
+ X509_NAME_ENTRY *entry;
+ if (len > X509_NAME_MAX)
+ len = X509_NAME_MAX;
+ q = p;
+
+ /* Get internal representation of Name */
+ ret = ASN1_item_ex_d2i(&intname.a,
+ &p, len, ASN1_ITEM_rptr(X509_NAME_INTERNAL),
+ tag, aclass, opt, ctx);
+
+ if (ret <= 0)
+ return ret;
+
+ if (*val)
+ x509_name_ex_free(val, NULL);
+ if (!x509_name_ex_new(&nm.a, NULL))
+ goto err;
+ /* We've decoded it: now cache encoding */
+ if (!BUF_MEM_grow(nm.x->bytes, p - q))
+ goto err;
+ memcpy(nm.x->bytes->data, q, p - q);
+
+ /* Convert internal representation to X509_NAME structure */
+ for (i = 0; i < sk_STACK_OF_X509_NAME_ENTRY_num(intname.s); i++) {
+ entries = sk_STACK_OF_X509_NAME_ENTRY_value(intname.s, i);
+ for (j = 0; j < sk_X509_NAME_ENTRY_num(entries); j++) {
+ entry = sk_X509_NAME_ENTRY_value(entries, j);
+ entry->set = i;
+ if (!sk_X509_NAME_ENTRY_push(nm.x->entries, entry))
+ goto err;
+ }
+ }
+ /*
+ * All entries have now been pushed to nm->x.entries
+ * free up the stacks in intname.s but not the entries
+ * themselves.
+ */
+ sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s, sk_X509_NAME_ENTRY_free);
+ intname.s = NULL;
+ ret = x509_name_canon(nm.x);
+ if (!ret)
+ goto err;
+ nm.x->modified = 0;
+ *val = nm.a;
+ *in = p;
+ return ret;
+
+ err:
+ /* If intname.s is not NULL only some entries exist in nm->x.entries:
+ * zero references in nm->x.entries list. Since all entries exist
+ * in intname.s we can free them all there
+ */
+ if (intname.s != NULL) {
+ sk_X509_NAME_ENTRY_zero(nm.x->entries);
+ sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s, name_entry_stack_free);
+ }
+ X509_NAME_free(nm.x);
+ ASN1err(ASN1_F_X509_NAME_EX_D2I, ERR_R_NESTED_ASN1_ERROR);
+ return 0;
+}
+
+static int x509_name_ex_i2d(ASN1_VALUE **val, unsigned char **out,
+ const ASN1_ITEM *it, int tag, int aclass)
+{
+ int ret;
+ X509_NAME *a = (X509_NAME *)*val;
+ if (a->modified) {
+ ret = x509_name_encode(a);
+ if (ret < 0)
+ return ret;
+ ret = x509_name_canon(a);
+ if (ret < 0)
+ return ret;
+ }
+ ret = a->bytes->length;
+ if (out != NULL) {
+ memcpy(*out, a->bytes->data, ret);
+ *out += ret;
+ }
+ return ret;
+}
+
+static void local_sk_X509_NAME_ENTRY_free(STACK_OF(X509_NAME_ENTRY) *ne)
+{
+ sk_X509_NAME_ENTRY_free(ne);
+}
+
+static void local_sk_X509_NAME_ENTRY_pop_free(STACK_OF(X509_NAME_ENTRY) *ne)
+{
+ sk_X509_NAME_ENTRY_pop_free(ne, X509_NAME_ENTRY_free);
+}
+
+static int x509_name_encode(X509_NAME *a)
+{
+ union {
+ STACK_OF(STACK_OF_X509_NAME_ENTRY) *s;
+ ASN1_VALUE *a;
+ } intname = {
+ NULL
+ };
+ int len;
+ unsigned char *p;
+ STACK_OF(X509_NAME_ENTRY) *entries = NULL;
+ X509_NAME_ENTRY *entry;
+ int i, set = -1;
+ intname.s = sk_STACK_OF_X509_NAME_ENTRY_new_null();
+ if (!intname.s)
+ goto memerr;
+ for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
+ entry = sk_X509_NAME_ENTRY_value(a->entries, i);
+ if (entry->set != set) {
+ entries = sk_X509_NAME_ENTRY_new_null();
+ if (!entries)
+ goto memerr;
+ if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname.s, entries))
+ goto memerr;
+ set = entry->set;
+ }
+ if (!sk_X509_NAME_ENTRY_push(entries, entry))
+ goto memerr;
+ }
+ len = ASN1_item_ex_i2d(&intname.a, NULL,
+ ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
+ if (!BUF_MEM_grow(a->bytes, len))
+ goto memerr;
+ p = (unsigned char *)a->bytes->data;
+ ASN1_item_ex_i2d(&intname.a,
+ &p, ASN1_ITEM_rptr(X509_NAME_INTERNAL), -1, -1);
+ sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
+ local_sk_X509_NAME_ENTRY_free);
+ a->modified = 0;
+ return len;
+ memerr:
+ sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname.s,
+ local_sk_X509_NAME_ENTRY_free);
+ ASN1err(ASN1_F_X509_NAME_ENCODE, ERR_R_MALLOC_FAILURE);
+ return -1;
+}
+
+static int x509_name_ex_print(BIO *out, ASN1_VALUE **pval,
+ int indent,
+ const char *fname, const ASN1_PCTX *pctx)
+{
+ if (X509_NAME_print_ex(out, (const X509_NAME *)*pval,
+ indent, pctx->nm_flags) <= 0)
+ return 0;
+ return 2;
+}
+
+/*
+ * This function generates the canonical encoding of the Name structure. In
+ * it all strings are converted to UTF8, leading, trailing and multiple
+ * spaces collapsed, converted to lower case and the leading SEQUENCE header
+ * removed. In future we could also normalize the UTF8 too. By doing this
+ * comparison of Name structures can be rapidly performed by just using
+ * memcmp() of the canonical encoding. By omitting the leading SEQUENCE name
+ * constraints of type dirName can also be checked with a simple memcmp().
+ */
+
+static int x509_name_canon(X509_NAME *a)
+{
+ unsigned char *p;
+ STACK_OF(STACK_OF_X509_NAME_ENTRY) *intname = NULL;
+ STACK_OF(X509_NAME_ENTRY) *entries = NULL;
+ X509_NAME_ENTRY *entry, *tmpentry = NULL;
+ int i, set = -1, ret = 0, len;
+
+ OPENSSL_free(a->canon_enc);
+ a->canon_enc = NULL;
+ /* Special case: empty X509_NAME => null encoding */
+ if (sk_X509_NAME_ENTRY_num(a->entries) == 0) {
+ a->canon_enclen = 0;
+ return 1;
+ }
+ intname = sk_STACK_OF_X509_NAME_ENTRY_new_null();
+ if (!intname)
+ goto err;
+ for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
+ entry = sk_X509_NAME_ENTRY_value(a->entries, i);
+ if (entry->set != set) {
+ entries = sk_X509_NAME_ENTRY_new_null();
+ if (!entries)
+ goto err;
+ if (!sk_STACK_OF_X509_NAME_ENTRY_push(intname, entries))
+ goto err;
+ set = entry->set;
+ }
+ tmpentry = X509_NAME_ENTRY_new();
+ if (tmpentry == NULL)
+ goto err;
+ tmpentry->object = OBJ_dup(entry->object);
+ if (tmpentry->object == NULL)
+ goto err;
+ if (!asn1_string_canon(tmpentry->value, entry->value))
+ goto err;
+ if (!sk_X509_NAME_ENTRY_push(entries, tmpentry))
+ goto err;
+ tmpentry = NULL;
+ }
+
+ /* Finally generate encoding */
+
+ len = i2d_name_canon(intname, NULL);
+ if (len < 0)
+ goto err;
+ a->canon_enclen = len;
+
+ p = OPENSSL_malloc(a->canon_enclen);
+
+ if (p == NULL)
+ goto err;
+
+ a->canon_enc = p;
+
+ i2d_name_canon(intname, &p);
+
+ ret = 1;
+
+ err:
+
+ X509_NAME_ENTRY_free(tmpentry);
+ sk_STACK_OF_X509_NAME_ENTRY_pop_free(intname,
+ local_sk_X509_NAME_ENTRY_pop_free);
+ return ret;
+}
+
+/* Bitmap of all the types of string that will be canonicalized. */
+
+#define ASN1_MASK_CANON \
+ (B_ASN1_UTF8STRING | B_ASN1_BMPSTRING | B_ASN1_UNIVERSALSTRING \
+ | B_ASN1_PRINTABLESTRING | B_ASN1_T61STRING | B_ASN1_IA5STRING \
+ | B_ASN1_VISIBLESTRING)
+
+static int asn1_string_canon(ASN1_STRING *out, const ASN1_STRING *in)
+{
+ unsigned char *to, *from;
+ int len, i;
+
+ /* If type not in bitmask just copy string across */
+ if (!(ASN1_tag2bit(in->type) & ASN1_MASK_CANON)) {
+ if (!ASN1_STRING_copy(out, in))
+ return 0;
+ return 1;
+ }
+
+ out->type = V_ASN1_UTF8STRING;
+ out->length = ASN1_STRING_to_UTF8(&out->data, in);
+ if (out->length == -1)
+ return 0;
+
+ to = out->data;
+ from = to;
+
+ len = out->length;
+
+ /*
+ * Convert string in place to canonical form. Ultimately we may need to
+ * handle a wider range of characters but for now ignore anything with
+ * MSB set and rely on the isspace() and tolower() functions.
+ */
+
+ /* Ignore leading spaces */
+ while ((len > 0) && !(*from & 0x80) && isspace(*from)) {
+ from++;
+ len--;
+ }
+
+ to = from + len;
+
+ /* Ignore trailing spaces */
+ while ((len > 0) && !(to[-1] & 0x80) && isspace(to[-1])) {
+ to--;
+ len--;
+ }
+
+ to = out->data;
+
+ i = 0;
+ while (i < len) {
+ /* If MSB set just copy across */
+ if (*from & 0x80) {
+ *to++ = *from++;
+ i++;
+ }
+ /* Collapse multiple spaces */
+ else if (isspace(*from)) {
+ /* Copy one space across */
+ *to++ = ' ';
+ /*
+ * Ignore subsequent spaces. Note: don't need to check len here
+ * because we know the last character is a non-space so we can't
+ * overflow.
+ */
+ do {
+ from++;
+ i++;
+ }
+ while (!(*from & 0x80) && isspace(*from));
+ } else {
+ *to++ = tolower(*from);
+ from++;
+ i++;
+ }
+ }
+
+ out->length = to - out->data;
+
+ return 1;
+
+}
+
+static int i2d_name_canon(STACK_OF(STACK_OF_X509_NAME_ENTRY) * _intname,
+ unsigned char **in)
+{
+ int i, len, ltmp;
+ ASN1_VALUE *v;
+ STACK_OF(ASN1_VALUE) *intname = (STACK_OF(ASN1_VALUE) *)_intname;
+
+ len = 0;
+ for (i = 0; i < sk_ASN1_VALUE_num(intname); i++) {
+ v = sk_ASN1_VALUE_value(intname, i);
+ ltmp = ASN1_item_ex_i2d(&v, in,
+ ASN1_ITEM_rptr(X509_NAME_ENTRIES), -1, -1);
+ if (ltmp < 0)
+ return ltmp;
+ len += ltmp;
+ }
+ return len;
+}
+
+int X509_NAME_set(X509_NAME **xn, X509_NAME *name)
+{
+ X509_NAME *in;
+
+ if (!xn || !name)
+ return (0);
+
+ if (*xn != name) {
+ in = X509_NAME_dup(name);
+ if (in != NULL) {
+ X509_NAME_free(*xn);
+ *xn = in;
+ }
+ }
+ return (*xn != NULL);
+}
+
+int X509_NAME_print(BIO *bp, const X509_NAME *name, int obase)
+{
+ char *s, *c, *b;
+ int l, i;
+
+ l = 80 - 2 - obase;
+
+ b = X509_NAME_oneline(name, NULL, 0);
+ if (!b)
+ return 0;
+ if (!*b) {
+ OPENSSL_free(b);
+ return 1;
+ }
+ s = b + 1; /* skip the first slash */
+
+ c = s;
+ for (;;) {
+#ifndef CHARSET_EBCDIC
+ if (((*s == '/') &&
+ ((s[1] >= 'A') && (s[1] <= 'Z') && ((s[2] == '=') ||
+ ((s[2] >= 'A')
+ && (s[2] <= 'Z')
+ && (s[3] == '='))
+ ))) || (*s == '\0'))
+#else
+ if (((*s == '/') &&
+ (isupper(s[1]) && ((s[2] == '=') ||
+ (isupper(s[2]) && (s[3] == '='))
+ ))) || (*s == '\0'))
+#endif
+ {
+ i = s - c;
+ if (BIO_write(bp, c, i) != i)
+ goto err;
+ c = s + 1; /* skip following slash */
+ if (*s != '\0') {
+ if (BIO_write(bp, ", ", 2) != 2)
+ goto err;
+ }
+ l--;
+ }
+ if (*s == '\0')
+ break;
+ s++;
+ l--;
+ }
+
+ OPENSSL_free(b);
+ return 1;
+ err:
+ X509err(X509_F_X509_NAME_PRINT, ERR_R_BUF_LIB);
+ OPENSSL_free(b);
+ return 0;
+}
+
+int X509_NAME_get0_der(X509_NAME *nm, const unsigned char **pder,
+ size_t *pderlen)
+{
+ /* Make sure encoding is valid */
+ if (i2d_X509_NAME(nm, NULL) <= 0)
+ return 0;
+ if (pder != NULL)
+ *pder = (unsigned char *)nm->bytes->data;
+ if (pderlen != NULL)
+ *pderlen = nm->bytes->length;
+ return 1;
+}
projects / cassiopeia.git / blobdiff