Restoring authorship annotation for <tpashkin@yandex-team.ru>. Commit 1 of 2.

1 files changed, 874 insertions, 874 deletions

diff --git a/contrib/libs/openssl/ssl/packet_local.h b/contrib/libs/openssl/ssl/packet_local.h
index 1b6c2fb9bc..c77abc3c3d 100644
--- a/contrib/libs/openssl/ssl/packet_local.h
+++ b/contrib/libs/openssl/ssl/packet_local.h
@@ -1,874 +1,874 @@
-/*
- * Copyright 2015-2018 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
- */
-
-#ifndef OSSL_SSL_PACKET_LOCAL_H
-# define OSSL_SSL_PACKET_LOCAL_H
-
-# include <string.h>
-# include <openssl/bn.h>
-# include <openssl/buffer.h>
-# include <openssl/crypto.h>
-# include <openssl/e_os2.h>
-
-# include "internal/numbers.h"
-
-typedef struct {
-    /* Pointer to where we are currently reading from */
-    const unsigned char *curr;
-    /* Number of bytes remaining */
-    size_t remaining;
-} PACKET;
-
-/* Internal unchecked shorthand; don't use outside this file. */
-static ossl_inline void packet_forward(PACKET *pkt, size_t len)
-{
-    pkt->curr += len;
-    pkt->remaining -= len;
-}
-
-/*
- * Returns the number of bytes remaining to be read in the PACKET
- */
-static ossl_inline size_t PACKET_remaining(const PACKET *pkt)
-{
-    return pkt->remaining;
-}
-
-/*
- * Returns a pointer to the first byte after the packet data.
- * Useful for integrating with non-PACKET parsing code.
- * Specifically, we use PACKET_end() to verify that a d2i_... call
- * has consumed the entire packet contents.
- */
-static ossl_inline const unsigned char *PACKET_end(const PACKET *pkt)
-{
-    return pkt->curr + pkt->remaining;
-}
-
-/*
- * Returns a pointer to the PACKET's current position.
- * For use in non-PACKETized APIs.
- */
-static ossl_inline const unsigned char *PACKET_data(const PACKET *pkt)
-{
-    return pkt->curr;
-}
-
-/*
- * Initialise a PACKET with |len| bytes held in |buf|. This does not make a
- * copy of the data so |buf| must be present for the whole time that the PACKET
- * is being used.
- */
-__owur static ossl_inline int PACKET_buf_init(PACKET *pkt,
-                                              const unsigned char *buf,
-                                              size_t len)
-{
-    /* Sanity check for negative values. */
-    if (len > (size_t)(SIZE_MAX / 2))
-        return 0;
-
-    pkt->curr = buf;
-    pkt->remaining = len;
-    return 1;
-}
-
-/* Initialize a PACKET to hold zero bytes. */
-static ossl_inline void PACKET_null_init(PACKET *pkt)
-{
-    pkt->curr = NULL;
-    pkt->remaining = 0;
-}
-
-/*
- * Returns 1 if the packet has length |num| and its contents equal the |num|
- * bytes read from |ptr|. Returns 0 otherwise (lengths or contents not equal).
- * If lengths are equal, performs the comparison in constant time.
- */
-__owur static ossl_inline int PACKET_equal(const PACKET *pkt, const void *ptr,
-                                           size_t num)
-{
-    if (PACKET_remaining(pkt) != num)
-        return 0;
-    return CRYPTO_memcmp(pkt->curr, ptr, num) == 0;
-}
-
-/*
- * Peek ahead and initialize |subpkt| with the next |len| bytes read from |pkt|.
- * Data is not copied: the |subpkt| packet will share its underlying buffer with
- * the original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|.
- */
-__owur static ossl_inline int PACKET_peek_sub_packet(const PACKET *pkt,
-                                                     PACKET *subpkt, size_t len)
-{
-    if (PACKET_remaining(pkt) < len)
-        return 0;
-
-    return PACKET_buf_init(subpkt, pkt->curr, len);
-}
-
-/*
- * Initialize |subpkt| with the next |len| bytes read from |pkt|. Data is not
- * copied: the |subpkt| packet will share its underlying buffer with the
- * original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|.
- */
-__owur static ossl_inline int PACKET_get_sub_packet(PACKET *pkt,
-                                                    PACKET *subpkt, size_t len)
-{
-    if (!PACKET_peek_sub_packet(pkt, subpkt, len))
-        return 0;
-
-    packet_forward(pkt, len);
-
-    return 1;
-}
-
-/*
- * Peek ahead at 2 bytes in network order from |pkt| and store the value in
- * |*data|
- */
-__owur static ossl_inline int PACKET_peek_net_2(const PACKET *pkt,
-                                                unsigned int *data)
-{
-    if (PACKET_remaining(pkt) < 2)
-        return 0;
-
-    *data = ((unsigned int)(*pkt->curr)) << 8;
-    *data |= *(pkt->curr + 1);
-
-    return 1;
-}
-
-/* Equivalent of n2s */
-/* Get 2 bytes in network order from |pkt| and store the value in |*data| */
-__owur static ossl_inline int PACKET_get_net_2(PACKET *pkt, unsigned int *data)
-{
-    if (!PACKET_peek_net_2(pkt, data))
-        return 0;
-
-    packet_forward(pkt, 2);
-
-    return 1;
-}
-
-/* Same as PACKET_get_net_2() but for a size_t */
-__owur static ossl_inline int PACKET_get_net_2_len(PACKET *pkt, size_t *data)
-{
-    unsigned int i;
-    int ret = PACKET_get_net_2(pkt, &i);
-
-    if (ret)
-        *data = (size_t)i;
-
-    return ret;
-}
-
-/*
- * Peek ahead at 3 bytes in network order from |pkt| and store the value in
- * |*data|
- */
-__owur static ossl_inline int PACKET_peek_net_3(const PACKET *pkt,
-                                                unsigned long *data)
-{
-    if (PACKET_remaining(pkt) < 3)
-        return 0;
-
-    *data = ((unsigned long)(*pkt->curr)) << 16;
-    *data |= ((unsigned long)(*(pkt->curr + 1))) << 8;
-    *data |= *(pkt->curr + 2);
-
-    return 1;
-}
-
-/* Equivalent of n2l3 */
-/* Get 3 bytes in network order from |pkt| and store the value in |*data| */
-__owur static ossl_inline int PACKET_get_net_3(PACKET *pkt, unsigned long *data)
-{
-    if (!PACKET_peek_net_3(pkt, data))
-        return 0;
-
-    packet_forward(pkt, 3);
-
-    return 1;
-}
-
-/* Same as PACKET_get_net_3() but for a size_t */
-__owur static ossl_inline int PACKET_get_net_3_len(PACKET *pkt, size_t *data)
-{
-    unsigned long i;
-    int ret = PACKET_get_net_3(pkt, &i);
-
-    if (ret)
-        *data = (size_t)i;
-
-    return ret;
-}
-
-/*
- * Peek ahead at 4 bytes in network order from |pkt| and store the value in
- * |*data|
- */
-__owur static ossl_inline int PACKET_peek_net_4(const PACKET *pkt,
-                                                unsigned long *data)
-{
-    if (PACKET_remaining(pkt) < 4)
-        return 0;
-
-    *data = ((unsigned long)(*pkt->curr)) << 24;
-    *data |= ((unsigned long)(*(pkt->curr + 1))) << 16;
-    *data |= ((unsigned long)(*(pkt->curr + 2))) << 8;
-    *data |= *(pkt->curr + 3);
-
-    return 1;
-}
-
-/* Equivalent of n2l */
-/* Get 4 bytes in network order from |pkt| and store the value in |*data| */
-__owur static ossl_inline int PACKET_get_net_4(PACKET *pkt, unsigned long *data)
-{
-    if (!PACKET_peek_net_4(pkt, data))
-        return 0;
-
-    packet_forward(pkt, 4);
-
-    return 1;
-}
-
-/* Same as PACKET_get_net_4() but for a size_t */
-__owur static ossl_inline int PACKET_get_net_4_len(PACKET *pkt, size_t *data)
-{
-    unsigned long i;
-    int ret = PACKET_get_net_4(pkt, &i);
-
-    if (ret)
-        *data = (size_t)i;
-
-    return ret;
-}
-
-/* Peek ahead at 1 byte from |pkt| and store the value in |*data| */
-__owur static ossl_inline int PACKET_peek_1(const PACKET *pkt,
-                                            unsigned int *data)
-{
-    if (!PACKET_remaining(pkt))
-        return 0;
-
-    *data = *pkt->curr;
-
-    return 1;
-}
-
-/* Get 1 byte from |pkt| and store the value in |*data| */
-__owur static ossl_inline int PACKET_get_1(PACKET *pkt, unsigned int *data)
-{
-    if (!PACKET_peek_1(pkt, data))
-        return 0;
-
-    packet_forward(pkt, 1);
-
-    return 1;
-}
-
-/* Same as PACKET_get_1() but for a size_t */
-__owur static ossl_inline int PACKET_get_1_len(PACKET *pkt, size_t *data)
-{
-    unsigned int i;
-    int ret = PACKET_get_1(pkt, &i);
-
-    if (ret)
-        *data = (size_t)i;
-
-    return ret;
-}
-
-/*
- * Peek ahead at 4 bytes in reverse network order from |pkt| and store the value
- * in |*data|
- */
-__owur static ossl_inline int PACKET_peek_4(const PACKET *pkt,
-                                            unsigned long *data)
-{
-    if (PACKET_remaining(pkt) < 4)
-        return 0;
-
-    *data = *pkt->curr;
-    *data |= ((unsigned long)(*(pkt->curr + 1))) << 8;
-    *data |= ((unsigned long)(*(pkt->curr + 2))) << 16;
-    *data |= ((unsigned long)(*(pkt->curr + 3))) << 24;
-
-    return 1;
-}
-
-/* Equivalent of c2l */
-/*
- * Get 4 bytes in reverse network order from |pkt| and store the value in
- * |*data|
- */
-__owur static ossl_inline int PACKET_get_4(PACKET *pkt, unsigned long *data)
-{
-    if (!PACKET_peek_4(pkt, data))
-        return 0;
-
-    packet_forward(pkt, 4);
-
-    return 1;
-}
-
-/*
- * Peek ahead at |len| bytes from the |pkt| and store a pointer to them in
- * |*data|. This just points at the underlying buffer that |pkt| is using. The
- * caller should not free this data directly (it will be freed when the
- * underlying buffer gets freed
- */
-__owur static ossl_inline int PACKET_peek_bytes(const PACKET *pkt,
-                                                const unsigned char **data,
-                                                size_t len)
-{
-    if (PACKET_remaining(pkt) < len)
-        return 0;
-
-    *data = pkt->curr;
-
-    return 1;
-}
-
-/*
- * Read |len| bytes from the |pkt| and store a pointer to them in |*data|. This
- * just points at the underlying buffer that |pkt| is using. The caller should
- * not free this data directly (it will be freed when the underlying buffer gets
- * freed
- */
-__owur static ossl_inline int PACKET_get_bytes(PACKET *pkt,
-                                               const unsigned char **data,
-                                               size_t len)
-{
-    if (!PACKET_peek_bytes(pkt, data, len))
-        return 0;
-
-    packet_forward(pkt, len);
-
-    return 1;
-}
-
-/* Peek ahead at |len| bytes from |pkt| and copy them to |data| */
-__owur static ossl_inline int PACKET_peek_copy_bytes(const PACKET *pkt,
-                                                     unsigned char *data,
-                                                     size_t len)
-{
-    if (PACKET_remaining(pkt) < len)
-        return 0;
-
-    memcpy(data, pkt->curr, len);
-
-    return 1;
-}
-
-/*
- * Read |len| bytes from |pkt| and copy them to |data|.
- * The caller is responsible for ensuring that |data| can hold |len| bytes.
- */
-__owur static ossl_inline int PACKET_copy_bytes(PACKET *pkt,
-                                                unsigned char *data, size_t len)
-{
-    if (!PACKET_peek_copy_bytes(pkt, data, len))
-        return 0;
-
-    packet_forward(pkt, len);
-
-    return 1;
-}
-
-/*
- * Copy packet data to |dest|, and set |len| to the number of copied bytes.
- * If the packet has more than |dest_len| bytes, nothing is copied.
- * Returns 1 if the packet data fits in |dest_len| bytes, 0 otherwise.
- * Does not forward PACKET position (because it is typically the last thing
- * done with a given PACKET).
- */
-__owur static ossl_inline int PACKET_copy_all(const PACKET *pkt,
-                                              unsigned char *dest,
-                                              size_t dest_len, size_t *len)
-{
-    if (PACKET_remaining(pkt) > dest_len) {
-        *len = 0;
-        return 0;
-    }
-    *len = pkt->remaining;
-    memcpy(dest, pkt->curr, pkt->remaining);
-    return 1;
-}
-
-/*
- * Copy |pkt| bytes to a newly allocated buffer and store a pointer to the
- * result in |*data|, and the length in |len|.
- * If |*data| is not NULL, the old data is OPENSSL_free'd.
- * If the packet is empty, or malloc fails, |*data| will be set to NULL.
- * Returns 1 if the malloc succeeds and 0 otherwise.
- * Does not forward PACKET position (because it is typically the last thing
- * done with a given PACKET).
- */
-__owur static ossl_inline int PACKET_memdup(const PACKET *pkt,
-                                            unsigned char **data, size_t *len)
-{
-    size_t length;
-
-    OPENSSL_free(*data);
-    *data = NULL;
-    *len = 0;
-
-    length = PACKET_remaining(pkt);
-
-    if (length == 0)
-        return 1;
-
-    *data = OPENSSL_memdup(pkt->curr, length);
-    if (*data == NULL)
-        return 0;
-
-    *len = length;
-    return 1;
-}
-
-/*
- * Read a C string from |pkt| and copy to a newly allocated, NUL-terminated
- * buffer. Store a pointer to the result in |*data|.
- * If |*data| is not NULL, the old data is OPENSSL_free'd.
- * If the data in |pkt| does not contain a NUL-byte, the entire data is
- * copied and NUL-terminated.
- * Returns 1 if the malloc succeeds and 0 otherwise.
- * Does not forward PACKET position (because it is typically the last thing done
- * with a given PACKET).
- */
-__owur static ossl_inline int PACKET_strndup(const PACKET *pkt, char **data)
-{
-    OPENSSL_free(*data);
-
-    /* This will succeed on an empty packet, unless pkt->curr == NULL. */
-    *data = OPENSSL_strndup((const char *)pkt->curr, PACKET_remaining(pkt));
-    return (*data != NULL);
-}
-
-/* Returns 1 if |pkt| contains at least one 0-byte, 0 otherwise. */
-static ossl_inline int PACKET_contains_zero_byte(const PACKET *pkt)
-{
-    return memchr(pkt->curr, 0, pkt->remaining) != NULL;
-}
-
-/* Move the current reading position forward |len| bytes */
-__owur static ossl_inline int PACKET_forward(PACKET *pkt, size_t len)
-{
-    if (PACKET_remaining(pkt) < len)
-        return 0;
-
-    packet_forward(pkt, len);
-
-    return 1;
-}
-
-/*
- * Reads a variable-length vector prefixed with a one-byte length, and stores
- * the contents in |subpkt|. |pkt| can equal |subpkt|.
- * Data is not copied: the |subpkt| packet will share its underlying buffer with
- * the original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|.
- * Upon failure, the original |pkt| and |subpkt| are not modified.
- */
-__owur static ossl_inline int PACKET_get_length_prefixed_1(PACKET *pkt,
-                                                           PACKET *subpkt)
-{
-    unsigned int length;
-    const unsigned char *data;
-    PACKET tmp = *pkt;
-    if (!PACKET_get_1(&tmp, &length) ||
-        !PACKET_get_bytes(&tmp, &data, (size_t)length)) {
-        return 0;
-    }
-
-    *pkt = tmp;
-    subpkt->curr = data;
-    subpkt->remaining = length;
-
-    return 1;
-}
-
-/*
- * Like PACKET_get_length_prefixed_1, but additionally, fails when there are
- * leftover bytes in |pkt|.
- */
-__owur static ossl_inline int PACKET_as_length_prefixed_1(PACKET *pkt,
-                                                          PACKET *subpkt)
-{
-    unsigned int length;
-    const unsigned char *data;
-    PACKET tmp = *pkt;
-    if (!PACKET_get_1(&tmp, &length) ||
-        !PACKET_get_bytes(&tmp, &data, (size_t)length) ||
-        PACKET_remaining(&tmp) != 0) {
-        return 0;
-    }
-
-    *pkt = tmp;
-    subpkt->curr = data;
-    subpkt->remaining = length;
-
-    return 1;
-}
-
-/*
- * Reads a variable-length vector prefixed with a two-byte length, and stores
- * the contents in |subpkt|. |pkt| can equal |subpkt|.
- * Data is not copied: the |subpkt| packet will share its underlying buffer with
- * the original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|.
- * Upon failure, the original |pkt| and |subpkt| are not modified.
- */
-__owur static ossl_inline int PACKET_get_length_prefixed_2(PACKET *pkt,
-                                                           PACKET *subpkt)
-{
-    unsigned int length;
-    const unsigned char *data;
-    PACKET tmp = *pkt;
-
-    if (!PACKET_get_net_2(&tmp, &length) ||
-        !PACKET_get_bytes(&tmp, &data, (size_t)length)) {
-        return 0;
-    }
-
-    *pkt = tmp;
-    subpkt->curr = data;
-    subpkt->remaining = length;
-
-    return 1;
-}
-
-/*
- * Like PACKET_get_length_prefixed_2, but additionally, fails when there are
- * leftover bytes in |pkt|.
- */
-__owur static ossl_inline int PACKET_as_length_prefixed_2(PACKET *pkt,
-                                                          PACKET *subpkt)
-{
-    unsigned int length;
-    const unsigned char *data;
-    PACKET tmp = *pkt;
-
-    if (!PACKET_get_net_2(&tmp, &length) ||
-        !PACKET_get_bytes(&tmp, &data, (size_t)length) ||
-        PACKET_remaining(&tmp) != 0) {
-        return 0;
-    }
-
-    *pkt = tmp;
-    subpkt->curr = data;
-    subpkt->remaining = length;
-
-    return 1;
-}
-
-/*
- * Reads a variable-length vector prefixed with a three-byte length, and stores
- * the contents in |subpkt|. |pkt| can equal |subpkt|.
- * Data is not copied: the |subpkt| packet will share its underlying buffer with
- * the original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|.
- * Upon failure, the original |pkt| and |subpkt| are not modified.
- */
-__owur static ossl_inline int PACKET_get_length_prefixed_3(PACKET *pkt,
-                                                           PACKET *subpkt)
-{
-    unsigned long length;
-    const unsigned char *data;
-    PACKET tmp = *pkt;
-    if (!PACKET_get_net_3(&tmp, &length) ||
-        !PACKET_get_bytes(&tmp, &data, (size_t)length)) {
-        return 0;
-    }
-
-    *pkt = tmp;
-    subpkt->curr = data;
-    subpkt->remaining = length;
-
-    return 1;
-}
-
-/* Writeable packets */
-
-typedef struct wpacket_sub WPACKET_SUB;
-struct wpacket_sub {
-    /* The parent WPACKET_SUB if we have one or NULL otherwise */
-    WPACKET_SUB *parent;
-
-    /*
-     * Offset into the buffer where the length of this WPACKET goes. We use an
-     * offset in case the buffer grows and gets reallocated.
-     */
-    size_t packet_len;
-
-    /* Number of bytes in the packet_len or 0 if we don't write the length */
-    size_t lenbytes;
-
-    /* Number of bytes written to the buf prior to this packet starting */
-    size_t pwritten;
-
-    /* Flags for this sub-packet */
-    unsigned int flags;
-};
-
-typedef struct wpacket_st WPACKET;
-struct wpacket_st {
-    /* The buffer where we store the output data */
-    BUF_MEM *buf;
-
-    /* Fixed sized buffer which can be used as an alternative to buf */
-    unsigned char *staticbuf;
-
-    /*
-     * Offset into the buffer where we are currently writing. We use an offset
-     * in case the buffer grows and gets reallocated.
-     */
-    size_t curr;
-
-    /* Number of bytes written so far */
-    size_t written;
-
-    /* Maximum number of bytes we will allow to be written to this WPACKET */
-    size_t maxsize;
-
-    /* Our sub-packets (always at least one if not finished) */
-    WPACKET_SUB *subs;
-};
-
-/* Flags */
-
-/* Default */
-#define WPACKET_FLAGS_NONE                      0
-
-/* Error on WPACKET_close() if no data written to the WPACKET */
-#define WPACKET_FLAGS_NON_ZERO_LENGTH           1
-
-/*
- * Abandon all changes on WPACKET_close() if no data written to the WPACKET,
- * i.e. this does not write out a zero packet length
- */
-#define WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH    2
-
-
-/*
- * Initialise a WPACKET with the buffer in |buf|. The buffer must exist
- * for the whole time that the WPACKET is being used. Additionally |lenbytes| of
- * data is preallocated at the start of the buffer to store the length of the
- * WPACKET once we know it.
- */
-int WPACKET_init_len(WPACKET *pkt, BUF_MEM *buf, size_t lenbytes);
-
-/*
- * Same as WPACKET_init_len except there is no preallocation of the WPACKET
- * length.
- */
-int WPACKET_init(WPACKET *pkt, BUF_MEM *buf);
-
-/*
- * Same as WPACKET_init_len except we do not use a growable BUF_MEM structure.
- * A fixed buffer of memory |buf| of size |len| is used instead. A failure will
- * occur if you attempt to write beyond the end of the buffer
- */
-int WPACKET_init_static_len(WPACKET *pkt, unsigned char *buf, size_t len,
-                            size_t lenbytes);
-/*
- * Set the flags to be applied to the current sub-packet
- */
-int WPACKET_set_flags(WPACKET *pkt, unsigned int flags);
-
-/*
- * Closes the most recent sub-packet. It also writes out the length of the
- * packet to the required location (normally the start of the WPACKET) if
- * appropriate. The top level WPACKET should be closed using WPACKET_finish()
- * instead of this function.
- */
-int WPACKET_close(WPACKET *pkt);
-
-/*
- * The same as WPACKET_close() but only for the top most WPACKET. Additionally
- * frees memory resources for this WPACKET.
- */
-int WPACKET_finish(WPACKET *pkt);
-
-/*
- * Iterate through all the sub-packets and write out their lengths as if they
- * were being closed. The lengths will be overwritten with the final lengths
- * when the sub-packets are eventually closed (which may be different if more
- * data is added to the WPACKET). This function fails if a sub-packet is of 0
- * length and WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH is set.
- */
-int WPACKET_fill_lengths(WPACKET *pkt);
-
-/*
- * Initialise a new sub-packet. Additionally |lenbytes| of data is preallocated
- * at the start of the sub-packet to store its length once we know it. Don't
- * call this directly. Use the convenience macros below instead.
- */
-int WPACKET_start_sub_packet_len__(WPACKET *pkt, size_t lenbytes);
-
-/*
- * Convenience macros for calling WPACKET_start_sub_packet_len with different
- * lengths
- */
-#define WPACKET_start_sub_packet_u8(pkt) \
-    WPACKET_start_sub_packet_len__((pkt), 1)
-#define WPACKET_start_sub_packet_u16(pkt) \
-    WPACKET_start_sub_packet_len__((pkt), 2)
-#define WPACKET_start_sub_packet_u24(pkt) \
-    WPACKET_start_sub_packet_len__((pkt), 3)
-#define WPACKET_start_sub_packet_u32(pkt) \
-    WPACKET_start_sub_packet_len__((pkt), 4)
-
-/*
- * Same as WPACKET_start_sub_packet_len__() except no bytes are pre-allocated
- * for the sub-packet length.
- */
-int WPACKET_start_sub_packet(WPACKET *pkt);
-
-/*
- * Allocate bytes in the WPACKET for the output. This reserves the bytes
- * and counts them as "written", but doesn't actually do the writing. A pointer
- * to the allocated bytes is stored in |*allocbytes|. |allocbytes| may be NULL.
- * WARNING: the allocated bytes must be filled in immediately, without further
- * WPACKET_* calls. If not then the underlying buffer may be realloc'd and
- * change its location.
- */
-int WPACKET_allocate_bytes(WPACKET *pkt, size_t len,
-                           unsigned char **allocbytes);
-
-/*
- * The same as WPACKET_allocate_bytes() except additionally a new sub-packet is
- * started for the allocated bytes, and then closed immediately afterwards. The
- * number of length bytes for the sub-packet is in |lenbytes|. Don't call this
- * directly. Use the convenience macros below instead.
- */
-int WPACKET_sub_allocate_bytes__(WPACKET *pkt, size_t len,
-                                 unsigned char **allocbytes, size_t lenbytes);
-
-/*
- * Convenience macros for calling WPACKET_sub_allocate_bytes with different
- * lengths
- */
-#define WPACKET_sub_allocate_bytes_u8(pkt, len, bytes) \
-    WPACKET_sub_allocate_bytes__((pkt), (len), (bytes), 1)
-#define WPACKET_sub_allocate_bytes_u16(pkt, len, bytes) \
-    WPACKET_sub_allocate_bytes__((pkt), (len), (bytes), 2)
-#define WPACKET_sub_allocate_bytes_u24(pkt, len, bytes) \
-    WPACKET_sub_allocate_bytes__((pkt), (len), (bytes), 3)
-#define WPACKET_sub_allocate_bytes_u32(pkt, len, bytes) \
-    WPACKET_sub_allocate_bytes__((pkt), (len), (bytes), 4)
-
-/*
- * The same as WPACKET_allocate_bytes() except the reserved bytes are not
- * actually counted as written. Typically this will be for when we don't know
- * how big arbitrary data is going to be up front, but we do know what the
- * maximum size will be. If this function is used, then it should be immediately
- * followed by a WPACKET_allocate_bytes() call before any other WPACKET
- * functions are called (unless the write to the allocated bytes is abandoned).
- *
- * For example: If we are generating a signature, then the size of that
- * signature may not be known in advance. We can use WPACKET_reserve_bytes() to
- * handle this:
- *
- *  if (!WPACKET_sub_reserve_bytes_u16(&pkt, EVP_PKEY_size(pkey), &sigbytes1)
- *          || EVP_SignFinal(md_ctx, sigbytes1, &siglen, pkey) <= 0
- *          || !WPACKET_sub_allocate_bytes_u16(&pkt, siglen, &sigbytes2)
- *          || sigbytes1 != sigbytes2)
- *      goto err;
- */
-int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes);
-
-/*
- * The "reserve_bytes" equivalent of WPACKET_sub_allocate_bytes__()
- */
-int WPACKET_sub_reserve_bytes__(WPACKET *pkt, size_t len,
-                                 unsigned char **allocbytes, size_t lenbytes);
-
-/*
- * Convenience macros for  WPACKET_sub_reserve_bytes with different lengths
- */
-#define WPACKET_sub_reserve_bytes_u8(pkt, len, bytes) \
-    WPACKET_reserve_bytes__((pkt), (len), (bytes), 1)
-#define WPACKET_sub_reserve_bytes_u16(pkt, len, bytes) \
-    WPACKET_sub_reserve_bytes__((pkt), (len), (bytes), 2)
-#define WPACKET_sub_reserve_bytes_u24(pkt, len, bytes) \
-    WPACKET_sub_reserve_bytes__((pkt), (len), (bytes), 3)
-#define WPACKET_sub_reserve_bytes_u32(pkt, len, bytes) \
-    WPACKET_sub_reserve_bytes__((pkt), (len), (bytes), 4)
-
-/*
- * Write the value stored in |val| into the WPACKET. The value will consume
- * |bytes| amount of storage. An error will occur if |val| cannot be
- * accommodated in |bytes| storage, e.g. attempting to write the value 256 into
- * 1 byte will fail. Don't call this directly. Use the convenience macros below
- * instead.
- */
-int WPACKET_put_bytes__(WPACKET *pkt, unsigned int val, size_t bytes);
-
-/*
- * Convenience macros for calling WPACKET_put_bytes with different
- * lengths
- */
-#define WPACKET_put_bytes_u8(pkt, val) \
-    WPACKET_put_bytes__((pkt), (val), 1)
-#define WPACKET_put_bytes_u16(pkt, val) \
-    WPACKET_put_bytes__((pkt), (val), 2)
-#define WPACKET_put_bytes_u24(pkt, val) \
-    WPACKET_put_bytes__((pkt), (val), 3)
-#define WPACKET_put_bytes_u32(pkt, val) \
-    WPACKET_put_bytes__((pkt), (val), 4)
-
-/* Set a maximum size that we will not allow the WPACKET to grow beyond */
-int WPACKET_set_max_size(WPACKET *pkt, size_t maxsize);
-
-/* Copy |len| bytes of data from |*src| into the WPACKET. */
-int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len);
-
-/* Set |len| bytes of data to |ch| into the WPACKET. */
-int WPACKET_memset(WPACKET *pkt, int ch, size_t len);
-
-/*
- * Copy |len| bytes of data from |*src| into the WPACKET and prefix with its
- * length (consuming |lenbytes| of data for the length). Don't call this
- * directly. Use the convenience macros below instead.
- */
-int WPACKET_sub_memcpy__(WPACKET *pkt, const void *src, size_t len,
-                       size_t lenbytes);
-
-/* Convenience macros for calling WPACKET_sub_memcpy with different lengths */
-#define WPACKET_sub_memcpy_u8(pkt, src, len) \
-    WPACKET_sub_memcpy__((pkt), (src), (len), 1)
-#define WPACKET_sub_memcpy_u16(pkt, src, len) \
-    WPACKET_sub_memcpy__((pkt), (src), (len), 2)
-#define WPACKET_sub_memcpy_u24(pkt, src, len) \
-    WPACKET_sub_memcpy__((pkt), (src), (len), 3)
-#define WPACKET_sub_memcpy_u32(pkt, src, len) \
-    WPACKET_sub_memcpy__((pkt), (src), (len), 4)
-
-/*
- * Return the total number of bytes written so far to the underlying buffer
- * including any storage allocated for length bytes
- */
-int WPACKET_get_total_written(WPACKET *pkt, size_t *written);
-
-/*
- * Returns the length of the current sub-packet. This excludes any bytes
- * allocated for the length itself.
- */
-int WPACKET_get_length(WPACKET *pkt, size_t *len);
-
-/*
- * Returns a pointer to the current write location, but does not allocate any
- * bytes.
- */
-unsigned char *WPACKET_get_curr(WPACKET *pkt);
-
-/* Release resources in a WPACKET if a failure has occurred. */
-void WPACKET_cleanup(WPACKET *pkt);
-
-#endif                          /* OSSL_SSL_PACKET_LOCAL_H */
+/* 
+ * Copyright 2015-2018 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 
+ */ 
+ 
+#ifndef OSSL_SSL_PACKET_LOCAL_H 
+# define OSSL_SSL_PACKET_LOCAL_H 
+ 
+# include <string.h> 
+# include <openssl/bn.h> 
+# include <openssl/buffer.h> 
+# include <openssl/crypto.h> 
+# include <openssl/e_os2.h> 
+ 
+# include "internal/numbers.h" 
+ 
+typedef struct { 
+    /* Pointer to where we are currently reading from */ 
+    const unsigned char *curr; 
+    /* Number of bytes remaining */ 
+    size_t remaining; 
+} PACKET; 
+ 
+/* Internal unchecked shorthand; don't use outside this file. */ 
+static ossl_inline void packet_forward(PACKET *pkt, size_t len) 
+{ 
+    pkt->curr += len; 
+    pkt->remaining -= len; 
+} 
+ 
+/* 
+ * Returns the number of bytes remaining to be read in the PACKET 
+ */ 
+static ossl_inline size_t PACKET_remaining(const PACKET *pkt) 
+{ 
+    return pkt->remaining; 
+} 
+ 
+/* 
+ * Returns a pointer to the first byte after the packet data. 
+ * Useful for integrating with non-PACKET parsing code. 
+ * Specifically, we use PACKET_end() to verify that a d2i_... call 
+ * has consumed the entire packet contents. 
+ */ 
+static ossl_inline const unsigned char *PACKET_end(const PACKET *pkt) 
+{ 
+    return pkt->curr + pkt->remaining; 
+} 
+ 
+/* 
+ * Returns a pointer to the PACKET's current position. 
+ * For use in non-PACKETized APIs. 
+ */ 
+static ossl_inline const unsigned char *PACKET_data(const PACKET *pkt) 
+{ 
+    return pkt->curr; 
+} 
+ 
+/* 
+ * Initialise a PACKET with |len| bytes held in |buf|. This does not make a 
+ * copy of the data so |buf| must be present for the whole time that the PACKET 
+ * is being used. 
+ */ 
+__owur static ossl_inline int PACKET_buf_init(PACKET *pkt, 
+                                              const unsigned char *buf, 
+                                              size_t len) 
+{ 
+    /* Sanity check for negative values. */ 
+    if (len > (size_t)(SIZE_MAX / 2)) 
+        return 0; 
+ 
+    pkt->curr = buf; 
+    pkt->remaining = len; 
+    return 1; 
+} 
+ 
+/* Initialize a PACKET to hold zero bytes. */ 
+static ossl_inline void PACKET_null_init(PACKET *pkt) 
+{ 
+    pkt->curr = NULL; 
+    pkt->remaining = 0; 
+} 
+ 
+/* 
+ * Returns 1 if the packet has length |num| and its contents equal the |num| 
+ * bytes read from |ptr|. Returns 0 otherwise (lengths or contents not equal). 
+ * If lengths are equal, performs the comparison in constant time. 
+ */ 
+__owur static ossl_inline int PACKET_equal(const PACKET *pkt, const void *ptr, 
+                                           size_t num) 
+{ 
+    if (PACKET_remaining(pkt) != num) 
+        return 0; 
+    return CRYPTO_memcmp(pkt->curr, ptr, num) == 0; 
+} 
+ 
+/* 
+ * Peek ahead and initialize |subpkt| with the next |len| bytes read from |pkt|. 
+ * Data is not copied: the |subpkt| packet will share its underlying buffer with 
+ * the original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|. 
+ */ 
+__owur static ossl_inline int PACKET_peek_sub_packet(const PACKET *pkt, 
+                                                     PACKET *subpkt, size_t len) 
+{ 
+    if (PACKET_remaining(pkt) < len) 
+        return 0; 
+ 
+    return PACKET_buf_init(subpkt, pkt->curr, len); 
+} 
+ 
+/* 
+ * Initialize |subpkt| with the next |len| bytes read from |pkt|. Data is not 
+ * copied: the |subpkt| packet will share its underlying buffer with the 
+ * original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|. 
+ */ 
+__owur static ossl_inline int PACKET_get_sub_packet(PACKET *pkt, 
+                                                    PACKET *subpkt, size_t len) 
+{ 
+    if (!PACKET_peek_sub_packet(pkt, subpkt, len)) 
+        return 0; 
+ 
+    packet_forward(pkt, len); 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Peek ahead at 2 bytes in network order from |pkt| and store the value in 
+ * |*data| 
+ */ 
+__owur static ossl_inline int PACKET_peek_net_2(const PACKET *pkt, 
+                                                unsigned int *data) 
+{ 
+    if (PACKET_remaining(pkt) < 2) 
+        return 0; 
+ 
+    *data = ((unsigned int)(*pkt->curr)) << 8; 
+    *data |= *(pkt->curr + 1); 
+ 
+    return 1; 
+} 
+ 
+/* Equivalent of n2s */ 
+/* Get 2 bytes in network order from |pkt| and store the value in |*data| */ 
+__owur static ossl_inline int PACKET_get_net_2(PACKET *pkt, unsigned int *data) 
+{ 
+    if (!PACKET_peek_net_2(pkt, data)) 
+        return 0; 
+ 
+    packet_forward(pkt, 2); 
+ 
+    return 1; 
+} 
+ 
+/* Same as PACKET_get_net_2() but for a size_t */ 
+__owur static ossl_inline int PACKET_get_net_2_len(PACKET *pkt, size_t *data) 
+{ 
+    unsigned int i; 
+    int ret = PACKET_get_net_2(pkt, &i); 
+ 
+    if (ret) 
+        *data = (size_t)i; 
+ 
+    return ret; 
+} 
+ 
+/* 
+ * Peek ahead at 3 bytes in network order from |pkt| and store the value in 
+ * |*data| 
+ */ 
+__owur static ossl_inline int PACKET_peek_net_3(const PACKET *pkt, 
+                                                unsigned long *data) 
+{ 
+    if (PACKET_remaining(pkt) < 3) 
+        return 0; 
+ 
+    *data = ((unsigned long)(*pkt->curr)) << 16; 
+    *data |= ((unsigned long)(*(pkt->curr + 1))) << 8; 
+    *data |= *(pkt->curr + 2); 
+ 
+    return 1; 
+} 
+ 
+/* Equivalent of n2l3 */ 
+/* Get 3 bytes in network order from |pkt| and store the value in |*data| */ 
+__owur static ossl_inline int PACKET_get_net_3(PACKET *pkt, unsigned long *data) 
+{ 
+    if (!PACKET_peek_net_3(pkt, data)) 
+        return 0; 
+ 
+    packet_forward(pkt, 3); 
+ 
+    return 1; 
+} 
+ 
+/* Same as PACKET_get_net_3() but for a size_t */ 
+__owur static ossl_inline int PACKET_get_net_3_len(PACKET *pkt, size_t *data) 
+{ 
+    unsigned long i; 
+    int ret = PACKET_get_net_3(pkt, &i); 
+ 
+    if (ret) 
+        *data = (size_t)i; 
+ 
+    return ret; 
+} 
+ 
+/* 
+ * Peek ahead at 4 bytes in network order from |pkt| and store the value in 
+ * |*data| 
+ */ 
+__owur static ossl_inline int PACKET_peek_net_4(const PACKET *pkt, 
+                                                unsigned long *data) 
+{ 
+    if (PACKET_remaining(pkt) < 4) 
+        return 0; 
+ 
+    *data = ((unsigned long)(*pkt->curr)) << 24; 
+    *data |= ((unsigned long)(*(pkt->curr + 1))) << 16; 
+    *data |= ((unsigned long)(*(pkt->curr + 2))) << 8; 
+    *data |= *(pkt->curr + 3); 
+ 
+    return 1; 
+} 
+ 
+/* Equivalent of n2l */ 
+/* Get 4 bytes in network order from |pkt| and store the value in |*data| */ 
+__owur static ossl_inline int PACKET_get_net_4(PACKET *pkt, unsigned long *data) 
+{ 
+    if (!PACKET_peek_net_4(pkt, data)) 
+        return 0; 
+ 
+    packet_forward(pkt, 4); 
+ 
+    return 1; 
+} 
+ 
+/* Same as PACKET_get_net_4() but for a size_t */ 
+__owur static ossl_inline int PACKET_get_net_4_len(PACKET *pkt, size_t *data) 
+{ 
+    unsigned long i; 
+    int ret = PACKET_get_net_4(pkt, &i); 
+ 
+    if (ret) 
+        *data = (size_t)i; 
+ 
+    return ret; 
+} 
+ 
+/* Peek ahead at 1 byte from |pkt| and store the value in |*data| */ 
+__owur static ossl_inline int PACKET_peek_1(const PACKET *pkt, 
+                                            unsigned int *data) 
+{ 
+    if (!PACKET_remaining(pkt)) 
+        return 0; 
+ 
+    *data = *pkt->curr; 
+ 
+    return 1; 
+} 
+ 
+/* Get 1 byte from |pkt| and store the value in |*data| */ 
+__owur static ossl_inline int PACKET_get_1(PACKET *pkt, unsigned int *data) 
+{ 
+    if (!PACKET_peek_1(pkt, data)) 
+        return 0; 
+ 
+    packet_forward(pkt, 1); 
+ 
+    return 1; 
+} 
+ 
+/* Same as PACKET_get_1() but for a size_t */ 
+__owur static ossl_inline int PACKET_get_1_len(PACKET *pkt, size_t *data) 
+{ 
+    unsigned int i; 
+    int ret = PACKET_get_1(pkt, &i); 
+ 
+    if (ret) 
+        *data = (size_t)i; 
+ 
+    return ret; 
+} 
+ 
+/* 
+ * Peek ahead at 4 bytes in reverse network order from |pkt| and store the value 
+ * in |*data| 
+ */ 
+__owur static ossl_inline int PACKET_peek_4(const PACKET *pkt, 
+                                            unsigned long *data) 
+{ 
+    if (PACKET_remaining(pkt) < 4) 
+        return 0; 
+ 
+    *data = *pkt->curr; 
+    *data |= ((unsigned long)(*(pkt->curr + 1))) << 8; 
+    *data |= ((unsigned long)(*(pkt->curr + 2))) << 16; 
+    *data |= ((unsigned long)(*(pkt->curr + 3))) << 24; 
+ 
+    return 1; 
+} 
+ 
+/* Equivalent of c2l */ 
+/* 
+ * Get 4 bytes in reverse network order from |pkt| and store the value in 
+ * |*data| 
+ */ 
+__owur static ossl_inline int PACKET_get_4(PACKET *pkt, unsigned long *data) 
+{ 
+    if (!PACKET_peek_4(pkt, data)) 
+        return 0; 
+ 
+    packet_forward(pkt, 4); 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Peek ahead at |len| bytes from the |pkt| and store a pointer to them in 
+ * |*data|. This just points at the underlying buffer that |pkt| is using. The 
+ * caller should not free this data directly (it will be freed when the 
+ * underlying buffer gets freed 
+ */ 
+__owur static ossl_inline int PACKET_peek_bytes(const PACKET *pkt, 
+                                                const unsigned char **data, 
+                                                size_t len) 
+{ 
+    if (PACKET_remaining(pkt) < len) 
+        return 0; 
+ 
+    *data = pkt->curr; 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Read |len| bytes from the |pkt| and store a pointer to them in |*data|. This 
+ * just points at the underlying buffer that |pkt| is using. The caller should 
+ * not free this data directly (it will be freed when the underlying buffer gets 
+ * freed 
+ */ 
+__owur static ossl_inline int PACKET_get_bytes(PACKET *pkt, 
+                                               const unsigned char **data, 
+                                               size_t len) 
+{ 
+    if (!PACKET_peek_bytes(pkt, data, len)) 
+        return 0; 
+ 
+    packet_forward(pkt, len); 
+ 
+    return 1; 
+} 
+ 
+/* Peek ahead at |len| bytes from |pkt| and copy them to |data| */ 
+__owur static ossl_inline int PACKET_peek_copy_bytes(const PACKET *pkt, 
+                                                     unsigned char *data, 
+                                                     size_t len) 
+{ 
+    if (PACKET_remaining(pkt) < len) 
+        return 0; 
+ 
+    memcpy(data, pkt->curr, len); 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Read |len| bytes from |pkt| and copy them to |data|. 
+ * The caller is responsible for ensuring that |data| can hold |len| bytes. 
+ */ 
+__owur static ossl_inline int PACKET_copy_bytes(PACKET *pkt, 
+                                                unsigned char *data, size_t len) 
+{ 
+    if (!PACKET_peek_copy_bytes(pkt, data, len)) 
+        return 0; 
+ 
+    packet_forward(pkt, len); 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Copy packet data to |dest|, and set |len| to the number of copied bytes. 
+ * If the packet has more than |dest_len| bytes, nothing is copied. 
+ * Returns 1 if the packet data fits in |dest_len| bytes, 0 otherwise. 
+ * Does not forward PACKET position (because it is typically the last thing 
+ * done with a given PACKET). 
+ */ 
+__owur static ossl_inline int PACKET_copy_all(const PACKET *pkt, 
+                                              unsigned char *dest, 
+                                              size_t dest_len, size_t *len) 
+{ 
+    if (PACKET_remaining(pkt) > dest_len) { 
+        *len = 0; 
+        return 0; 
+    } 
+    *len = pkt->remaining; 
+    memcpy(dest, pkt->curr, pkt->remaining); 
+    return 1; 
+} 
+ 
+/* 
+ * Copy |pkt| bytes to a newly allocated buffer and store a pointer to the 
+ * result in |*data|, and the length in |len|. 
+ * If |*data| is not NULL, the old data is OPENSSL_free'd. 
+ * If the packet is empty, or malloc fails, |*data| will be set to NULL. 
+ * Returns 1 if the malloc succeeds and 0 otherwise. 
+ * Does not forward PACKET position (because it is typically the last thing 
+ * done with a given PACKET). 
+ */ 
+__owur static ossl_inline int PACKET_memdup(const PACKET *pkt, 
+                                            unsigned char **data, size_t *len) 
+{ 
+    size_t length; 
+ 
+    OPENSSL_free(*data); 
+    *data = NULL; 
+    *len = 0; 
+ 
+    length = PACKET_remaining(pkt); 
+ 
+    if (length == 0) 
+        return 1; 
+ 
+    *data = OPENSSL_memdup(pkt->curr, length); 
+    if (*data == NULL) 
+        return 0; 
+ 
+    *len = length; 
+    return 1; 
+} 
+ 
+/* 
+ * Read a C string from |pkt| and copy to a newly allocated, NUL-terminated 
+ * buffer. Store a pointer to the result in |*data|. 
+ * If |*data| is not NULL, the old data is OPENSSL_free'd. 
+ * If the data in |pkt| does not contain a NUL-byte, the entire data is 
+ * copied and NUL-terminated. 
+ * Returns 1 if the malloc succeeds and 0 otherwise. 
+ * Does not forward PACKET position (because it is typically the last thing done 
+ * with a given PACKET). 
+ */ 
+__owur static ossl_inline int PACKET_strndup(const PACKET *pkt, char **data) 
+{ 
+    OPENSSL_free(*data); 
+ 
+    /* This will succeed on an empty packet, unless pkt->curr == NULL. */ 
+    *data = OPENSSL_strndup((const char *)pkt->curr, PACKET_remaining(pkt)); 
+    return (*data != NULL); 
+} 
+ 
+/* Returns 1 if |pkt| contains at least one 0-byte, 0 otherwise. */ 
+static ossl_inline int PACKET_contains_zero_byte(const PACKET *pkt) 
+{ 
+    return memchr(pkt->curr, 0, pkt->remaining) != NULL; 
+} 
+ 
+/* Move the current reading position forward |len| bytes */ 
+__owur static ossl_inline int PACKET_forward(PACKET *pkt, size_t len) 
+{ 
+    if (PACKET_remaining(pkt) < len) 
+        return 0; 
+ 
+    packet_forward(pkt, len); 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Reads a variable-length vector prefixed with a one-byte length, and stores 
+ * the contents in |subpkt|. |pkt| can equal |subpkt|. 
+ * Data is not copied: the |subpkt| packet will share its underlying buffer with 
+ * the original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|. 
+ * Upon failure, the original |pkt| and |subpkt| are not modified. 
+ */ 
+__owur static ossl_inline int PACKET_get_length_prefixed_1(PACKET *pkt, 
+                                                           PACKET *subpkt) 
+{ 
+    unsigned int length; 
+    const unsigned char *data; 
+    PACKET tmp = *pkt; 
+    if (!PACKET_get_1(&tmp, &length) || 
+        !PACKET_get_bytes(&tmp, &data, (size_t)length)) { 
+        return 0; 
+    } 
+ 
+    *pkt = tmp; 
+    subpkt->curr = data; 
+    subpkt->remaining = length; 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Like PACKET_get_length_prefixed_1, but additionally, fails when there are 
+ * leftover bytes in |pkt|. 
+ */ 
+__owur static ossl_inline int PACKET_as_length_prefixed_1(PACKET *pkt, 
+                                                          PACKET *subpkt) 
+{ 
+    unsigned int length; 
+    const unsigned char *data; 
+    PACKET tmp = *pkt; 
+    if (!PACKET_get_1(&tmp, &length) || 
+        !PACKET_get_bytes(&tmp, &data, (size_t)length) || 
+        PACKET_remaining(&tmp) != 0) { 
+        return 0; 
+    } 
+ 
+    *pkt = tmp; 
+    subpkt->curr = data; 
+    subpkt->remaining = length; 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Reads a variable-length vector prefixed with a two-byte length, and stores 
+ * the contents in |subpkt|. |pkt| can equal |subpkt|. 
+ * Data is not copied: the |subpkt| packet will share its underlying buffer with 
+ * the original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|. 
+ * Upon failure, the original |pkt| and |subpkt| are not modified. 
+ */ 
+__owur static ossl_inline int PACKET_get_length_prefixed_2(PACKET *pkt, 
+                                                           PACKET *subpkt) 
+{ 
+    unsigned int length; 
+    const unsigned char *data; 
+    PACKET tmp = *pkt; 
+ 
+    if (!PACKET_get_net_2(&tmp, &length) || 
+        !PACKET_get_bytes(&tmp, &data, (size_t)length)) { 
+        return 0; 
+    } 
+ 
+    *pkt = tmp; 
+    subpkt->curr = data; 
+    subpkt->remaining = length; 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Like PACKET_get_length_prefixed_2, but additionally, fails when there are 
+ * leftover bytes in |pkt|. 
+ */ 
+__owur static ossl_inline int PACKET_as_length_prefixed_2(PACKET *pkt, 
+                                                          PACKET *subpkt) 
+{ 
+    unsigned int length; 
+    const unsigned char *data; 
+    PACKET tmp = *pkt; 
+ 
+    if (!PACKET_get_net_2(&tmp, &length) || 
+        !PACKET_get_bytes(&tmp, &data, (size_t)length) || 
+        PACKET_remaining(&tmp) != 0) { 
+        return 0; 
+    } 
+ 
+    *pkt = tmp; 
+    subpkt->curr = data; 
+    subpkt->remaining = length; 
+ 
+    return 1; 
+} 
+ 
+/* 
+ * Reads a variable-length vector prefixed with a three-byte length, and stores 
+ * the contents in |subpkt|. |pkt| can equal |subpkt|. 
+ * Data is not copied: the |subpkt| packet will share its underlying buffer with 
+ * the original |pkt|, so data wrapped by |pkt| must outlive the |subpkt|. 
+ * Upon failure, the original |pkt| and |subpkt| are not modified. 
+ */ 
+__owur static ossl_inline int PACKET_get_length_prefixed_3(PACKET *pkt, 
+                                                           PACKET *subpkt) 
+{ 
+    unsigned long length; 
+    const unsigned char *data; 
+    PACKET tmp = *pkt; 
+    if (!PACKET_get_net_3(&tmp, &length) || 
+        !PACKET_get_bytes(&tmp, &data, (size_t)length)) { 
+        return 0; 
+    } 
+ 
+    *pkt = tmp; 
+    subpkt->curr = data; 
+    subpkt->remaining = length; 
+ 
+    return 1; 
+} 
+ 
+/* Writeable packets */ 
+ 
+typedef struct wpacket_sub WPACKET_SUB; 
+struct wpacket_sub { 
+    /* The parent WPACKET_SUB if we have one or NULL otherwise */ 
+    WPACKET_SUB *parent; 
+ 
+    /* 
+     * Offset into the buffer where the length of this WPACKET goes. We use an 
+     * offset in case the buffer grows and gets reallocated. 
+     */ 
+    size_t packet_len; 
+ 
+    /* Number of bytes in the packet_len or 0 if we don't write the length */ 
+    size_t lenbytes; 
+ 
+    /* Number of bytes written to the buf prior to this packet starting */ 
+    size_t pwritten; 
+ 
+    /* Flags for this sub-packet */ 
+    unsigned int flags; 
+}; 
+ 
+typedef struct wpacket_st WPACKET; 
+struct wpacket_st { 
+    /* The buffer where we store the output data */ 
+    BUF_MEM *buf; 
+ 
+    /* Fixed sized buffer which can be used as an alternative to buf */ 
+    unsigned char *staticbuf; 
+ 
+    /* 
+     * Offset into the buffer where we are currently writing. We use an offset 
+     * in case the buffer grows and gets reallocated. 
+     */ 
+    size_t curr; 
+ 
+    /* Number of bytes written so far */ 
+    size_t written; 
+ 
+    /* Maximum number of bytes we will allow to be written to this WPACKET */ 
+    size_t maxsize; 
+ 
+    /* Our sub-packets (always at least one if not finished) */ 
+    WPACKET_SUB *subs; 
+}; 
+ 
+/* Flags */ 
+ 
+/* Default */ 
+#define WPACKET_FLAGS_NONE                      0 
+ 
+/* Error on WPACKET_close() if no data written to the WPACKET */ 
+#define WPACKET_FLAGS_NON_ZERO_LENGTH           1 
+ 
+/* 
+ * Abandon all changes on WPACKET_close() if no data written to the WPACKET, 
+ * i.e. this does not write out a zero packet length 
+ */ 
+#define WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH    2 
+ 
+ 
+/* 
+ * Initialise a WPACKET with the buffer in |buf|. The buffer must exist 
+ * for the whole time that the WPACKET is being used. Additionally |lenbytes| of 
+ * data is preallocated at the start of the buffer to store the length of the 
+ * WPACKET once we know it. 
+ */ 
+int WPACKET_init_len(WPACKET *pkt, BUF_MEM *buf, size_t lenbytes); 
+ 
+/* 
+ * Same as WPACKET_init_len except there is no preallocation of the WPACKET 
+ * length. 
+ */ 
+int WPACKET_init(WPACKET *pkt, BUF_MEM *buf); 
+ 
+/* 
+ * Same as WPACKET_init_len except we do not use a growable BUF_MEM structure. 
+ * A fixed buffer of memory |buf| of size |len| is used instead. A failure will 
+ * occur if you attempt to write beyond the end of the buffer 
+ */ 
+int WPACKET_init_static_len(WPACKET *pkt, unsigned char *buf, size_t len, 
+                            size_t lenbytes); 
+/* 
+ * Set the flags to be applied to the current sub-packet 
+ */ 
+int WPACKET_set_flags(WPACKET *pkt, unsigned int flags); 
+ 
+/* 
+ * Closes the most recent sub-packet. It also writes out the length of the 
+ * packet to the required location (normally the start of the WPACKET) if 
+ * appropriate. The top level WPACKET should be closed using WPACKET_finish() 
+ * instead of this function. 
+ */ 
+int WPACKET_close(WPACKET *pkt); 
+ 
+/* 
+ * The same as WPACKET_close() but only for the top most WPACKET. Additionally 
+ * frees memory resources for this WPACKET. 
+ */ 
+int WPACKET_finish(WPACKET *pkt); 
+ 
+/* 
+ * Iterate through all the sub-packets and write out their lengths as if they 
+ * were being closed. The lengths will be overwritten with the final lengths 
+ * when the sub-packets are eventually closed (which may be different if more 
+ * data is added to the WPACKET). This function fails if a sub-packet is of 0 
+ * length and WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH is set. 
+ */ 
+int WPACKET_fill_lengths(WPACKET *pkt); 
+ 
+/* 
+ * Initialise a new sub-packet. Additionally |lenbytes| of data is preallocated 
+ * at the start of the sub-packet to store its length once we know it. Don't 
+ * call this directly. Use the convenience macros below instead. 
+ */ 
+int WPACKET_start_sub_packet_len__(WPACKET *pkt, size_t lenbytes); 
+ 
+/* 
+ * Convenience macros for calling WPACKET_start_sub_packet_len with different 
+ * lengths 
+ */ 
+#define WPACKET_start_sub_packet_u8(pkt) \ 
+    WPACKET_start_sub_packet_len__((pkt), 1) 
+#define WPACKET_start_sub_packet_u16(pkt) \ 
+    WPACKET_start_sub_packet_len__((pkt), 2) 
+#define WPACKET_start_sub_packet_u24(pkt) \ 
+    WPACKET_start_sub_packet_len__((pkt), 3) 
+#define WPACKET_start_sub_packet_u32(pkt) \ 
+    WPACKET_start_sub_packet_len__((pkt), 4) 
+ 
+/* 
+ * Same as WPACKET_start_sub_packet_len__() except no bytes are pre-allocated 
+ * for the sub-packet length. 
+ */ 
+int WPACKET_start_sub_packet(WPACKET *pkt); 
+ 
+/* 
+ * Allocate bytes in the WPACKET for the output. This reserves the bytes 
+ * and counts them as "written", but doesn't actually do the writing. A pointer 
+ * to the allocated bytes is stored in |*allocbytes|. |allocbytes| may be NULL. 
+ * WARNING: the allocated bytes must be filled in immediately, without further 
+ * WPACKET_* calls. If not then the underlying buffer may be realloc'd and 
+ * change its location. 
+ */ 
+int WPACKET_allocate_bytes(WPACKET *pkt, size_t len, 
+                           unsigned char **allocbytes); 
+ 
+/* 
+ * The same as WPACKET_allocate_bytes() except additionally a new sub-packet is 
+ * started for the allocated bytes, and then closed immediately afterwards. The 
+ * number of length bytes for the sub-packet is in |lenbytes|. Don't call this 
+ * directly. Use the convenience macros below instead. 
+ */ 
+int WPACKET_sub_allocate_bytes__(WPACKET *pkt, size_t len, 
+                                 unsigned char **allocbytes, size_t lenbytes); 
+ 
+/* 
+ * Convenience macros for calling WPACKET_sub_allocate_bytes with different 
+ * lengths 
+ */ 
+#define WPACKET_sub_allocate_bytes_u8(pkt, len, bytes) \ 
+    WPACKET_sub_allocate_bytes__((pkt), (len), (bytes), 1) 
+#define WPACKET_sub_allocate_bytes_u16(pkt, len, bytes) \ 
+    WPACKET_sub_allocate_bytes__((pkt), (len), (bytes), 2) 
+#define WPACKET_sub_allocate_bytes_u24(pkt, len, bytes) \ 
+    WPACKET_sub_allocate_bytes__((pkt), (len), (bytes), 3) 
+#define WPACKET_sub_allocate_bytes_u32(pkt, len, bytes) \ 
+    WPACKET_sub_allocate_bytes__((pkt), (len), (bytes), 4) 
+ 
+/* 
+ * The same as WPACKET_allocate_bytes() except the reserved bytes are not 
+ * actually counted as written. Typically this will be for when we don't know 
+ * how big arbitrary data is going to be up front, but we do know what the 
+ * maximum size will be. If this function is used, then it should be immediately 
+ * followed by a WPACKET_allocate_bytes() call before any other WPACKET 
+ * functions are called (unless the write to the allocated bytes is abandoned). 
+ * 
+ * For example: If we are generating a signature, then the size of that 
+ * signature may not be known in advance. We can use WPACKET_reserve_bytes() to 
+ * handle this: 
+ * 
+ *  if (!WPACKET_sub_reserve_bytes_u16(&pkt, EVP_PKEY_size(pkey), &sigbytes1) 
+ *          || EVP_SignFinal(md_ctx, sigbytes1, &siglen, pkey) <= 0 
+ *          || !WPACKET_sub_allocate_bytes_u16(&pkt, siglen, &sigbytes2) 
+ *          || sigbytes1 != sigbytes2) 
+ *      goto err; 
+ */ 
+int WPACKET_reserve_bytes(WPACKET *pkt, size_t len, unsigned char **allocbytes); 
+ 
+/* 
+ * The "reserve_bytes" equivalent of WPACKET_sub_allocate_bytes__() 
+ */ 
+int WPACKET_sub_reserve_bytes__(WPACKET *pkt, size_t len, 
+                                 unsigned char **allocbytes, size_t lenbytes); 
+ 
+/* 
+ * Convenience macros for  WPACKET_sub_reserve_bytes with different lengths 
+ */ 
+#define WPACKET_sub_reserve_bytes_u8(pkt, len, bytes) \ 
+    WPACKET_reserve_bytes__((pkt), (len), (bytes), 1) 
+#define WPACKET_sub_reserve_bytes_u16(pkt, len, bytes) \ 
+    WPACKET_sub_reserve_bytes__((pkt), (len), (bytes), 2) 
+#define WPACKET_sub_reserve_bytes_u24(pkt, len, bytes) \ 
+    WPACKET_sub_reserve_bytes__((pkt), (len), (bytes), 3) 
+#define WPACKET_sub_reserve_bytes_u32(pkt, len, bytes) \ 
+    WPACKET_sub_reserve_bytes__((pkt), (len), (bytes), 4) 
+ 
+/* 
+ * Write the value stored in |val| into the WPACKET. The value will consume 
+ * |bytes| amount of storage. An error will occur if |val| cannot be 
+ * accommodated in |bytes| storage, e.g. attempting to write the value 256 into 
+ * 1 byte will fail. Don't call this directly. Use the convenience macros below 
+ * instead. 
+ */ 
+int WPACKET_put_bytes__(WPACKET *pkt, unsigned int val, size_t bytes); 
+ 
+/* 
+ * Convenience macros for calling WPACKET_put_bytes with different 
+ * lengths 
+ */ 
+#define WPACKET_put_bytes_u8(pkt, val) \ 
+    WPACKET_put_bytes__((pkt), (val), 1) 
+#define WPACKET_put_bytes_u16(pkt, val) \ 
+    WPACKET_put_bytes__((pkt), (val), 2) 
+#define WPACKET_put_bytes_u24(pkt, val) \ 
+    WPACKET_put_bytes__((pkt), (val), 3) 
+#define WPACKET_put_bytes_u32(pkt, val) \ 
+    WPACKET_put_bytes__((pkt), (val), 4) 
+ 
+/* Set a maximum size that we will not allow the WPACKET to grow beyond */ 
+int WPACKET_set_max_size(WPACKET *pkt, size_t maxsize); 
+ 
+/* Copy |len| bytes of data from |*src| into the WPACKET. */ 
+int WPACKET_memcpy(WPACKET *pkt, const void *src, size_t len); 
+ 
+/* Set |len| bytes of data to |ch| into the WPACKET. */ 
+int WPACKET_memset(WPACKET *pkt, int ch, size_t len); 
+ 
+/* 
+ * Copy |len| bytes of data from |*src| into the WPACKET and prefix with its 
+ * length (consuming |lenbytes| of data for the length). Don't call this 
+ * directly. Use the convenience macros below instead. 
+ */ 
+int WPACKET_sub_memcpy__(WPACKET *pkt, const void *src, size_t len, 
+                       size_t lenbytes); 
+ 
+/* Convenience macros for calling WPACKET_sub_memcpy with different lengths */ 
+#define WPACKET_sub_memcpy_u8(pkt, src, len) \ 
+    WPACKET_sub_memcpy__((pkt), (src), (len), 1) 
+#define WPACKET_sub_memcpy_u16(pkt, src, len) \ 
+    WPACKET_sub_memcpy__((pkt), (src), (len), 2) 
+#define WPACKET_sub_memcpy_u24(pkt, src, len) \ 
+    WPACKET_sub_memcpy__((pkt), (src), (len), 3) 
+#define WPACKET_sub_memcpy_u32(pkt, src, len) \ 
+    WPACKET_sub_memcpy__((pkt), (src), (len), 4) 
+ 
+/* 
+ * Return the total number of bytes written so far to the underlying buffer 
+ * including any storage allocated for length bytes 
+ */ 
+int WPACKET_get_total_written(WPACKET *pkt, size_t *written); 
+ 
+/* 
+ * Returns the length of the current sub-packet. This excludes any bytes 
+ * allocated for the length itself. 
+ */ 
+int WPACKET_get_length(WPACKET *pkt, size_t *len); 
+ 
+/* 
+ * Returns a pointer to the current write location, but does not allocate any 
+ * bytes. 
+ */ 
+unsigned char *WPACKET_get_curr(WPACKET *pkt); 
+ 
+/* Release resources in a WPACKET if a failure has occurred. */ 
+void WPACKET_cleanup(WPACKET *pkt); 
+ 
+#endif                          /* OSSL_SSL_PACKET_LOCAL_H */