Initial commit of BoringSSL for Android.

1 files changed, 260 insertions, 0 deletions

diff --git a/src/crypto/asn1/tasn_utl.c b/src/crypto/asn1/tasn_utl.c
new file mode 100644
index 0000000..f6045e4
--- /dev/null
+++ b/src/crypto/asn1/tasn_utl.c
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+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.] */
+
+#include <openssl/asn1.h>
+
+#include <string.h>
+
+#include <openssl/asn1t.h>
+#include <openssl/mem.h>
+#include <openssl/obj.h>
+#include <openssl/err.h>
+
+
+/* Utility functions for manipulating fields and offsets */
+
+/* Add 'offset' to 'addr' */
+#define offset2ptr(addr, offset) (void *)(((char *) addr) + offset)
+
+/* Given an ASN1_ITEM CHOICE type return the selector value */
+int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it) {
+  int *sel = offset2ptr(*pval, it->utype);
+  return *sel;
+}
+
+/* Given an ASN1_ITEM CHOICE type set the selector value, return old value. */
+int asn1_set_choice_selector(ASN1_VALUE **pval, int value,
+                             const ASN1_ITEM *it) {
+  int *sel, ret;
+  sel = offset2ptr(*pval, it->utype);
+  ret = *sel;
+  *sel = value;
+  return ret;
+}
+
+/* Do reference counting. The value 'op' decides what to do. if it is +1 then
+ * the count is incremented. If op is 0 count is set to 1. If op is -1 count is
+ * decremented and the return value is the current refrence count or 0 if no
+ * reference count exists. */
+int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it) {
+  const ASN1_AUX *aux;
+  int *lck, ret;
+  if (it->itype != ASN1_ITYPE_SEQUENCE &&
+      it->itype != ASN1_ITYPE_NDEF_SEQUENCE) {
+    return 0;
+  }
+  aux = it->funcs;
+  if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT)) {
+    return 0;
+  }
+  lck = offset2ptr(*pval, aux->ref_offset);
+  if (op == 0) {
+    *lck = 1;
+    return 1;
+  }
+  ret = CRYPTO_add(lck, op, aux->ref_lock);
+  return ret;
+}
+
+static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it) {
+  const ASN1_AUX *aux;
+  if (!pval || !*pval) {
+    return NULL;
+  }
+  aux = it->funcs;
+  if (!aux || !(aux->flags & ASN1_AFLG_ENCODING)) {
+    return NULL;
+  }
+  return offset2ptr(*pval, aux->enc_offset);
+}
+
+void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it) {
+  ASN1_ENCODING *enc;
+  enc = asn1_get_enc_ptr(pval, it);
+  if (enc) {
+    enc->enc = NULL;
+    enc->len = 0;
+    enc->modified = 1;
+  }
+}
+
+void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it) {
+  ASN1_ENCODING *enc;
+  enc = asn1_get_enc_ptr(pval, it);
+  if (enc) {
+    if (enc->enc) {
+      OPENSSL_free(enc->enc);
+    }
+    enc->enc = NULL;
+    enc->len = 0;
+    enc->modified = 1;
+  }
+}
+
+int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen,
+                  const ASN1_ITEM *it) {
+  ASN1_ENCODING *enc;
+  enc = asn1_get_enc_ptr(pval, it);
+  if (!enc) {
+    return 1;
+  }
+
+  if (enc->enc) {
+    OPENSSL_free(enc->enc);
+  }
+  enc->enc = OPENSSL_malloc(inlen);
+  if (!enc->enc) {
+    return 0;
+  }
+  memcpy(enc->enc, in, inlen);
+  enc->len = inlen;
+  enc->modified = 0;
+
+  return 1;
+}
+
+int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval,
+                     const ASN1_ITEM *it) {
+  ASN1_ENCODING *enc;
+  enc = asn1_get_enc_ptr(pval, it);
+  if (!enc || enc->modified) {
+    return 0;
+  }
+  if (out) {
+    memcpy(*out, enc->enc, enc->len);
+    *out += enc->len;
+  }
+  if (len) {
+    *len = enc->len;
+  }
+  return 1;
+}
+
+/* Given an ASN1_TEMPLATE get a pointer to a field */
+ASN1_VALUE **asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) {
+  ASN1_VALUE **pvaltmp;
+  if (tt->flags & ASN1_TFLG_COMBINE) {
+    return pval;
+  }
+  pvaltmp = offset2ptr(*pval, tt->offset);
+  /* NOTE for BOOLEAN types the field is just a plain int so we can't return
+   * int **, so settle for (int *). */
+  return pvaltmp;
+}
+
+/* Handle ANY DEFINED BY template, find the selector, look up the relevant
+ * ASN1_TEMPLATE in the table and return it. */
+const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt,
+                                 int nullerr) {
+  const ASN1_ADB *adb;
+  const ASN1_ADB_TABLE *atbl;
+  long selector;
+  ASN1_VALUE **sfld;
+  int i;
+  if (!(tt->flags & ASN1_TFLG_ADB_MASK)) {
+    return tt;
+  }
+
+  /* Else ANY DEFINED BY ... get the table */
+  adb = ASN1_ADB_ptr(tt->item);
+
+  /* Get the selector field */
+  sfld = offset2ptr(*pval, adb->offset);
+
+  /* Check if NULL */
+  if (!sfld) {
+    if (!adb->null_tt) {
+      goto err;
+    }
+    return adb->null_tt;
+  }
+
+  /* Convert type to a long:
+   * NB: don't check for NID_undef here because it
+   * might be a legitimate value in the table */
+  if (tt->flags & ASN1_TFLG_ADB_OID) {
+    selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld);
+  } else {
+    selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld);
+  }
+
+  /* Try to find matching entry in table Maybe should check application types
+   * first to allow application override? Might also be useful to have a flag
+   * which indicates table is sorted and we can do a binary search. For now
+   * stick to a linear search. */
+
+  for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++) {
+    if (atbl->value == selector) {
+      return &atbl->tt;
+    }
+  }
+
+  /* FIXME: need to search application table too */
+
+  /* No match, return default type */
+  if (!adb->default_tt) {
+    goto err;
+  }
+  return adb->default_tt;
+
+err:
+  /* FIXME: should log the value or OID of unsupported type */
+  if (nullerr) {
+    OPENSSL_PUT_ERROR(ASN1, asn1_do_adb,
+                      ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE);
+  }
+  return NULL;
+}