Initial commit of BoringSSL for Android.

1 files changed, 328 insertions, 0 deletions

diff --git a/src/crypto/bn/random.c b/src/crypto/bn/random.c
new file mode 100644
index 0000000..285bf26
--- /dev/null
+++ b/src/crypto/bn/random.c
@@ -0,0 +1,328 @@
+/* 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.]
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
+ *
+ * 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 above 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 acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@openssl.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com). */
+
+#include <openssl/bn.h>
+
+#include <string.h>
+
+#include <openssl/err.h>
+#include <openssl/mem.h>
+#include <openssl/rand.h>
+#include <openssl/sha.h>
+
+int BN_rand(BIGNUM *rnd, int bits, int top, int bottom) {
+  uint8_t *buf = NULL;
+  int ret = 0, bit, bytes, mask;
+
+  if (rnd == NULL) {
+    return 0;
+  }
+
+  if (bits == 0) {
+    BN_zero(rnd);
+    return 1;
+  }
+
+  bytes = (bits + 7) / 8;
+  bit = (bits - 1) % 8;
+  mask = 0xff << (bit + 1);
+
+  buf = OPENSSL_malloc(bytes);
+  if (buf == NULL) {
+    OPENSSL_PUT_ERROR(BN, BN_rand, ERR_R_MALLOC_FAILURE);
+    goto err;
+  }
+
+  /* Make a random number and set the top and bottom bits. */
+  if (!RAND_bytes(buf, bytes)) {
+    goto err;
+  }
+
+  if (top != -1) {
+    if (top) {
+      if (bit == 0) {
+        buf[0] = 1;
+        buf[1] |= 0x80;
+      } else {
+        buf[0] |= (3 << (bit - 1));
+      }
+    } else {
+      buf[0] |= (1 << bit);
+    }
+  }
+
+  buf[0] &= ~mask;
+
+  /* set bottom bit if requested */
+  if (bottom)  {
+    buf[bytes - 1] |= 1;
+  }
+
+  if (!BN_bin2bn(buf, bytes, rnd)) {
+    goto err;
+  }
+
+  ret = 1;
+
+err:
+  if (buf != NULL) {
+    OPENSSL_cleanse(buf, bytes);
+    OPENSSL_free(buf);
+  }
+  return (ret);
+}
+
+int BN_pseudo_rand(BIGNUM *rnd, int bits, int top, int bottom) {
+  return BN_rand(rnd, bits, top, bottom);
+}
+
+int BN_rand_range(BIGNUM *r, const BIGNUM *range) {
+  unsigned n;
+  unsigned count = 100;
+
+  if (range->neg || BN_is_zero(range)) {
+    OPENSSL_PUT_ERROR(BN, BN_rand_range, BN_R_INVALID_RANGE);
+    return 0;
+  }
+
+  n = BN_num_bits(range); /* n > 0 */
+
+  /* BN_is_bit_set(range, n - 1) always holds */
+  if (n == 1) {
+    BN_zero(r);
+  } else if (!BN_is_bit_set(range, n - 2) && !BN_is_bit_set(range, n - 3)) {
+    /* range = 100..._2,
+     * so  3*range (= 11..._2)  is exactly one bit longer than  range */
+    do {
+      if (!BN_rand(r, n + 1, -1 /* don't set most significant bits */,
+                   0 /* don't set least significant bits */)) {
+        return 0;
+      }
+
+      /* If r < 3*range, use r := r MOD range (which is either r, r - range, or
+       * r - 2*range). Otherwise, iterate again. Since 3*range = 11..._2, each
+       * iteration succeeds with probability >= .75. */
+      if (BN_cmp(r, range) >= 0) {
+        if (!BN_sub(r, r, range)) {
+          return 0;
+        }
+        if (BN_cmp(r, range) >= 0) {
+          if (!BN_sub(r, r, range)) {
+            return 0;
+          }
+        }
+      }
+
+      if (!--count) {
+        OPENSSL_PUT_ERROR(BN, BN_rand_range, BN_R_TOO_MANY_ITERATIONS);
+        return 0;
+      }
+    } while (BN_cmp(r, range) >= 0);
+  } else {
+    do {
+      /* range = 11..._2  or  range = 101..._2 */
+      if (!BN_rand(r, n, -1, 0)) {
+        return 0;
+      }
+
+      if (!--count) {
+        OPENSSL_PUT_ERROR(BN, BN_rand_range, BN_R_TOO_MANY_ITERATIONS);
+        return 0;
+      }
+    } while (BN_cmp(r, range) >= 0);
+  }
+
+  return 1;
+}
+
+int BN_pseudo_rand_range(BIGNUM *r, const BIGNUM *range) {
+  return BN_rand_range(r, range);
+}
+
+int BN_generate_dsa_nonce(BIGNUM *out, const BIGNUM *range, const BIGNUM *priv,
+                          const uint8_t *message, size_t message_len,
+                          BN_CTX *ctx) {
+  SHA512_CTX sha;
+  /* We use 512 bits of random data per iteration to
+   * ensure that we have at least |range| bits of randomness. */
+  uint8_t random_bytes[64];
+  uint8_t digest[SHA512_DIGEST_LENGTH];
+  size_t done, todo, attempt;
+  const unsigned num_k_bytes = BN_num_bytes(range);
+  const unsigned bits_to_mask = (8 - (BN_num_bits(range) % 8)) % 8;
+  uint8_t private_bytes[96];
+  uint8_t *k_bytes = NULL;
+  int ret = 0;
+
+  if (out == NULL) {
+    return 0;
+  }
+
+  if (BN_is_zero(range)) {
+    OPENSSL_PUT_ERROR(BN, BN_generate_dsa_nonce, BN_R_DIV_BY_ZERO);
+    goto err;
+  }
+
+  k_bytes = OPENSSL_malloc(num_k_bytes);
+  if (!k_bytes) {
+    OPENSSL_PUT_ERROR(BN, BN_generate_dsa_nonce, ERR_R_MALLOC_FAILURE);
+    goto err;
+  }
+
+  /* We copy |priv| into a local buffer to avoid furthur exposing its
+   * length. */
+  todo = sizeof(priv->d[0]) * priv->top;
+  if (todo > sizeof(private_bytes)) {
+    /* No reasonable DSA or ECDSA key should have a private key
+     * this large and we don't handle this case in order to avoid
+     * leaking the length of the private key. */
+    OPENSSL_PUT_ERROR(BN, BN_generate_dsa_nonce, BN_R_PRIVATE_KEY_TOO_LARGE);
+    goto err;
+  }
+  memcpy(private_bytes, priv->d, todo);
+  memset(private_bytes + todo, 0, sizeof(private_bytes) - todo);
+
+  for (attempt = 0;; attempt++) {
+    for (done = 0; done < num_k_bytes;) {
+      if (!RAND_bytes(random_bytes, sizeof(random_bytes))) {
+        goto err;
+      }
+      SHA512_Init(&sha);
+      SHA512_Update(&sha, &attempt, sizeof(attempt));
+      SHA512_Update(&sha, &done, sizeof(done));
+      SHA512_Update(&sha, private_bytes, sizeof(private_bytes));
+      SHA512_Update(&sha, message, message_len);
+      SHA512_Update(&sha, random_bytes, sizeof(random_bytes));
+      SHA512_Final(digest, &sha);
+
+      todo = num_k_bytes - done;
+      if (todo > SHA512_DIGEST_LENGTH) {
+        todo = SHA512_DIGEST_LENGTH;
+      }
+      memcpy(k_bytes + done, digest, todo);
+      done += todo;
+    }
+
+    k_bytes[0] &= 0xff >> bits_to_mask;
+
+    if (!BN_bin2bn(k_bytes, num_k_bytes, out)) {
+      goto err;
+    }
+    if (BN_cmp(out, range) < 0) {
+      break;
+    }
+  }
+
+  ret = 1;
+
+err:
+  if (k_bytes) {
+    OPENSSL_free(k_bytes);
+  }
+  return ret;
+}