Initial commit of BoringSSL for Android.

1 files changed, 499 insertions, 0 deletions

diff --git a/src/crypto/bio/buffer.c b/src/crypto/bio/buffer.c
new file mode 100644
index 0000000..5e423a1
--- /dev/null
+++ b/src/crypto/bio/buffer.c
@@ -0,0 +1,499 @@
+/* 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/bio.h>
+
+#include <string.h>
+
+#include <openssl/buf.h>
+#include <openssl/err.h>
+#include <openssl/mem.h>
+
+
+#define DEFAULT_BUFFER_SIZE 4096
+
+typedef struct bio_f_buffer_ctx_struct {
+  /* Buffers are setup like this:
+   *
+   * <---------------------- size ----------------------->
+   * +---------------------------------------------------+
+   * | consumed | remaining          | free space        |
+   * +---------------------------------------------------+
+   * <-- off --><------- len ------->
+   */
+
+  int ibuf_size;  /* how big is the input buffer */
+  int obuf_size;  /* how big is the output buffer */
+
+  char *ibuf;   /* the char array */
+  int ibuf_len; /* how many bytes are in it */
+  int ibuf_off; /* write/read offset */
+
+  char *obuf;   /* the char array */
+  int obuf_len; /* how many bytes are in it */
+  int obuf_off; /* write/read offset */
+} BIO_F_BUFFER_CTX;
+
+static int buffer_new(BIO *bio) {
+  BIO_F_BUFFER_CTX *ctx;
+
+  ctx = OPENSSL_malloc(sizeof(BIO_F_BUFFER_CTX));
+  if (ctx == NULL) {
+    return 0;
+  }
+  memset(ctx, 0, sizeof(BIO_F_BUFFER_CTX));
+
+  ctx->ibuf = OPENSSL_malloc(DEFAULT_BUFFER_SIZE);
+  if (ctx->ibuf == NULL) {
+    goto err1;
+  }
+  ctx->obuf = (char *)OPENSSL_malloc(DEFAULT_BUFFER_SIZE);
+  if (ctx->obuf == NULL) {
+    goto err2;
+  }
+  ctx->ibuf_size = DEFAULT_BUFFER_SIZE;
+  ctx->obuf_size = DEFAULT_BUFFER_SIZE;
+
+  bio->init = 1;
+  bio->ptr = (char *)ctx;
+  return 1;
+
+err2:
+  OPENSSL_free(ctx->ibuf);
+
+err1:
+  OPENSSL_free(ctx);
+  return 0;
+}
+
+static int buffer_free(BIO *bio) {
+  BIO_F_BUFFER_CTX *ctx;
+
+  if (bio == NULL) {
+    return 0;
+  }
+
+  ctx = (BIO_F_BUFFER_CTX *)bio->ptr;
+  if (ctx->ibuf != NULL) {
+    OPENSSL_free(ctx->ibuf);
+  }
+  if (ctx->obuf != NULL) {
+    OPENSSL_free(ctx->obuf);
+  }
+  OPENSSL_free(bio->ptr);
+
+  bio->ptr = NULL;
+  bio->init = 0;
+  bio->flags = 0;
+
+  return 1;
+}
+
+static int buffer_read(BIO *bio, char *out, int outl) {
+  int i, num = 0;
+  BIO_F_BUFFER_CTX *ctx;
+
+  ctx = (BIO_F_BUFFER_CTX *)bio->ptr;
+
+  if (ctx == NULL || bio->next_bio == NULL) {
+    return 0;
+  }
+
+  num = 0;
+  BIO_clear_retry_flags(bio);
+
+  for (;;) {
+    i = ctx->ibuf_len;
+    /* If there is stuff left over, grab it */
+    if (i != 0) {
+      if (i > outl) {
+        i = outl;
+      }
+      memcpy(out, &ctx->ibuf[ctx->ibuf_off], i);
+      ctx->ibuf_off += i;
+      ctx->ibuf_len -= i;
+      num += i;
+      if (outl == i) {
+        return num;
+      }
+      outl -= i;
+      out += i;
+    }
+
+    /* We may have done a partial read. Try to do more. We have nothing in the
+     * buffer. If we get an error and have read some data, just return it and
+     * let them retry to get the error again. Copy direct to parent address
+     * space */
+    if (outl > ctx->ibuf_size) {
+      for (;;) {
+        i = BIO_read(bio->next_bio, out, outl);
+        if (i <= 0) {
+          BIO_copy_next_retry(bio);
+          if (i < 0) {
+            return (num > 0) ? num : i;
+          }
+          return num;
+        }
+        num += i;
+        if (outl == i) {
+          return num;
+        }
+        out += i;
+        outl -= i;
+      }
+    }
+    /* else */
+
+    /* we are going to be doing some buffering */
+    i = BIO_read(bio->next_bio, ctx->ibuf, ctx->ibuf_size);
+    if (i <= 0) {
+      BIO_copy_next_retry(bio);
+      if (i < 0) {
+        return (num > 0) ? num : i;
+      }
+      return num;
+    }
+    ctx->ibuf_off = 0;
+    ctx->ibuf_len = i;
+  }
+}
+
+static int buffer_write(BIO *b, const char *in, int inl) {
+  int i, num = 0;
+  BIO_F_BUFFER_CTX *ctx;
+
+  ctx = (BIO_F_BUFFER_CTX *)b->ptr;
+  if (ctx == NULL || b->next_bio == NULL) {
+    return 0;
+  }
+
+  BIO_clear_retry_flags(b);
+
+  for (;;) {
+    i = ctx->obuf_size - (ctx->obuf_off + ctx->obuf_len);
+    /* add to buffer and return */
+    if (i >= inl) {
+      memcpy(&ctx->obuf[ctx->obuf_off + ctx->obuf_len], in, inl);
+      ctx->obuf_len += inl;
+      return num + inl;
+    }
+    /* else */
+    /* stuff already in buffer, so add to it first, then flush */
+    if (ctx->obuf_len != 0) {
+      if (i > 0) {
+        memcpy(&ctx->obuf[ctx->obuf_off + ctx->obuf_len], in, i);
+        in += i;
+        inl -= i;
+        num += i;
+        ctx->obuf_len += i;
+      }
+
+      /* we now have a full buffer needing flushing */
+      for (;;) {
+        i = BIO_write(b->next_bio, &ctx->obuf[ctx->obuf_off], ctx->obuf_len);
+        if (i <= 0) {
+          BIO_copy_next_retry(b);
+
+          if (i < 0) {
+            return (num > 0) ? num : i;
+          }
+          return num;
+        }
+        ctx->obuf_off += i;
+        ctx->obuf_len -= i;
+        if (ctx->obuf_len == 0) {
+          break;
+        }
+      }
+    }
+
+    /* we only get here if the buffer has been flushed and we
+     * still have stuff to write */
+    ctx->obuf_off = 0;
+
+    /* we now have inl bytes to write */
+    while (inl >= ctx->obuf_size) {
+      i = BIO_write(b->next_bio, in, inl);
+      if (i <= 0) {
+        BIO_copy_next_retry(b);
+        if (i < 0) {
+          return (num > 0) ? num : i;
+        }
+        return num;
+      }
+      num += i;
+      in += i;
+      inl -= i;
+      if (inl == 0) {
+        return num;
+      }
+    }
+
+    /* copy the rest into the buffer since we have only a small
+     * amount left */
+  }
+}
+
+static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr) {
+  BIO_F_BUFFER_CTX *ctx;
+  long ret = 1;
+  char *p1, *p2;
+  int r, *ip;
+  int ibs, obs;
+
+  ctx = (BIO_F_BUFFER_CTX *)b->ptr;
+
+  switch (cmd) {
+    case BIO_CTRL_RESET:
+      ctx->ibuf_off = 0;
+      ctx->ibuf_len = 0;
+      ctx->obuf_off = 0;
+      ctx->obuf_len = 0;
+      if (b->next_bio == NULL) {
+        return 0;
+      }
+      ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+      break;
+
+    case BIO_CTRL_INFO:
+      ret = ctx->obuf_len;
+      break;
+
+    case BIO_CTRL_WPENDING:
+      ret = (long)ctx->obuf_len;
+      if (ret == 0) {
+        if (b->next_bio == NULL)
+          return 0;
+        ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+      }
+      break;
+
+    case BIO_CTRL_PENDING:
+      ret = (long)ctx->ibuf_len;
+      if (ret == 0) {
+        if (b->next_bio == NULL) {
+          return 0;
+        }
+        ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+      }
+      break;
+
+    case BIO_C_SET_BUFF_SIZE:
+      ip = (int *)ptr;
+      if (*ip == 0) {
+        ibs = (int)num;
+        obs = ctx->obuf_size;
+      } else /* if (*ip == 1) */ {
+        ibs = ctx->ibuf_size;
+        obs = (int)num;
+      }
+      p1 = ctx->ibuf;
+      p2 = ctx->obuf;
+      if (ibs > DEFAULT_BUFFER_SIZE && ibs != ctx->ibuf_size) {
+        p1 = (char *)OPENSSL_malloc(ibs);
+        if (p1 == NULL) {
+          goto malloc_error;
+        }
+      }
+      if (obs > DEFAULT_BUFFER_SIZE && obs != ctx->obuf_size) {
+        p2 = (char *)OPENSSL_malloc(obs);
+        if (p2 == NULL) {
+          if (p1 != ctx->ibuf) {
+            OPENSSL_free(p1);
+          }
+          goto malloc_error;
+        }
+      }
+
+      if (ctx->ibuf != p1) {
+        OPENSSL_free(ctx->ibuf);
+        ctx->ibuf = p1;
+        ctx->ibuf_size = ibs;
+      }
+      ctx->ibuf_off = 0;
+      ctx->ibuf_len = 0;
+
+      if (ctx->obuf != p2) {
+        OPENSSL_free(ctx->obuf);
+        ctx->obuf = p2;
+        ctx->obuf_size = obs;
+      }
+      ctx->obuf_off = 0;
+      ctx->obuf_len = 0;
+      break;
+
+    case BIO_CTRL_FLUSH:
+      if (b->next_bio == NULL) {
+        return 0;
+      }
+
+      while (ctx->obuf_len > 0) {
+        BIO_clear_retry_flags(b);
+        r = BIO_write(b->next_bio, &(ctx->obuf[ctx->obuf_off]),
+                      ctx->obuf_len);
+        BIO_copy_next_retry(b);
+        if (r <= 0) {
+          return r;
+        }
+        ctx->obuf_off += r;
+        ctx->obuf_len -= r;
+      }
+
+      ctx->obuf_len = 0;
+      ctx->obuf_off = 0;
+      ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+      break;
+
+    default:
+      if (b->next_bio == NULL) {
+        return 0;
+      }
+      BIO_clear_retry_flags(b);
+      ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
+      BIO_copy_next_retry(b);
+      break;
+  }
+  return ret;
+
+malloc_error:
+  OPENSSL_PUT_ERROR(BIO, buffer_ctrl, ERR_R_MALLOC_FAILURE);
+  return 0;
+}
+
+static long buffer_callback_ctrl(BIO *b, int cmd, bio_info_cb fp) {
+  long ret = 1;
+
+  if (b->next_bio == NULL) {
+    return 0;
+  }
+
+  switch (cmd) {
+    default:
+      ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
+      break;
+  }
+  return ret;
+}
+
+static int buffer_gets(BIO *b, char *buf, int size) {
+  BIO_F_BUFFER_CTX *ctx;
+  int num = 0, i, flag;
+  char *p;
+
+  ctx = (BIO_F_BUFFER_CTX *)b->ptr;
+  if (buf == NULL || size <= 0) {
+    return 0;
+  }
+
+  size--; /* reserve space for a '\0' */
+  BIO_clear_retry_flags(b);
+
+  for (;;) {
+    if (ctx->ibuf_len > 0) {
+      p = &ctx->ibuf[ctx->ibuf_off];
+      flag = 0;
+      for (i = 0; (i < ctx->ibuf_len) && (i < size); i++) {
+        *(buf++) = p[i];
+        if (p[i] == '\n') {
+          flag = 1;
+          i++;
+          break;
+        }
+      }
+      num += i;
+      size -= i;
+      ctx->ibuf_len -= i;
+      ctx->ibuf_off += i;
+      if (flag || size == 0) {
+        *buf = '\0';
+        return num;
+      }
+    } else /* read another chunk */
+    {
+      i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size);
+      if (i <= 0) {
+        BIO_copy_next_retry(b);
+        *buf = '\0';
+        if (i < 0) {
+          return (num > 0) ? num : i;
+        }
+        return num;
+      }
+      ctx->ibuf_len = i;
+      ctx->ibuf_off = 0;
+    }
+  }
+}
+
+static int buffer_puts(BIO *b, const char *str) {
+  return buffer_write(b, str, strlen(str));
+}
+
+static const BIO_METHOD methods_buffer = {
+    BIO_TYPE_BUFFER, "buffer",             buffer_write, buffer_read,
+    buffer_puts,     buffer_gets,          buffer_ctrl,  buffer_new,
+    buffer_free,     buffer_callback_ctrl,
+};
+
+const BIO_METHOD *BIO_f_buffer(void) { return &methods_buffer; }
+
+int BIO_set_read_buffer_size(BIO *bio, int buffer_size) {
+  return BIO_int_ctrl(bio, BIO_C_SET_BUFF_SIZE, buffer_size, 0);
+}
+
+int BIO_set_write_buffer_size(BIO *bio, int buffer_size) {
+  return BIO_int_ctrl(bio, BIO_C_SET_BUFF_SIZE, buffer_size, 1);
+}