Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc-cloned / deps / grpc / third_party / boringssl / crypto / bn_extra / bn_asn1.c

diff --git a/legacy-libs/grpc-cloned/deps/grpc/third_party/boringssl/crypto/bn_extra/bn_asn1.c b/legacy-libs/grpc-cloned/deps/grpc/third_party/boringssl/crypto/bn_extra/bn_asn1.c
new file mode 100644 (file)
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+++ b/legacy-libs/grpc-cloned/deps/grpc/third_party/boringssl/crypto/bn_extra/bn_asn1.c
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+/* Copyright (c) 2015, Google Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <openssl/bn.h>
+
+#include <openssl/bytestring.h>
+#include <openssl/err.h>
+
+
+int BN_parse_asn1_unsigned(CBS *cbs, BIGNUM *ret) {
+  CBS child;
+  if (!CBS_get_asn1(cbs, &child, CBS_ASN1_INTEGER) ||
+      CBS_len(&child) == 0) {
+    OPENSSL_PUT_ERROR(BN, BN_R_BAD_ENCODING);
+    return 0;
+  }
+
+  if (CBS_data(&child)[0] & 0x80) {
+    OPENSSL_PUT_ERROR(BN, BN_R_NEGATIVE_NUMBER);
+    return 0;
+  }
+
+  // INTEGERs must be minimal.
+  if (CBS_data(&child)[0] == 0x00 &&
+      CBS_len(&child) > 1 &&
+      !(CBS_data(&child)[1] & 0x80)) {
+    OPENSSL_PUT_ERROR(BN, BN_R_BAD_ENCODING);
+    return 0;
+  }
+
+  return BN_bin2bn(CBS_data(&child), CBS_len(&child), ret) != NULL;
+}
+
+int BN_marshal_asn1(CBB *cbb, const BIGNUM *bn) {
+  // Negative numbers are unsupported.
+  if (BN_is_negative(bn)) {
+    OPENSSL_PUT_ERROR(BN, BN_R_NEGATIVE_NUMBER);
+    return 0;
+  }
+
+  CBB child;
+  if (!CBB_add_asn1(cbb, &child, CBS_ASN1_INTEGER) ||
+      // The number must be padded with a leading zero if the high bit would
+      // otherwise be set or if |bn| is zero.
+      (BN_num_bits(bn) % 8 == 0 && !CBB_add_u8(&child, 0x00)) ||
+      !BN_bn2cbb_padded(&child, BN_num_bytes(bn), bn) ||
+      !CBB_flush(cbb)) {
+    OPENSSL_PUT_ERROR(BN, BN_R_ENCODE_ERROR);
+    return 0;
+  }
+
+  return 1;
+}