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s23_pkt.c 4.1 KB

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  1. /* ssl/s23_pkt.c */
  2. /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  3. * All rights reserved.
  4. *
  5. * This package is an SSL implementation written
  6. * by Eric Young (eay@cryptsoft.com).
  7. * The implementation was written so as to conform with Netscapes SSL.
  8. *
  9. * This library is free for commercial and non-commercial use as long as
  10. * the following conditions are aheared to. The following conditions
  11. * apply to all code found in this distribution, be it the RC4, RSA,
  12. * lhash, DES, etc., code; not just the SSL code. The SSL documentation
  13. * included with this distribution is covered by the same copyright terms
  14. * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15. *
  16. * Copyright remains Eric Young's, and as such any Copyright notices in
  17. * the code are not to be removed.
  18. * If this package is used in a product, Eric Young should be given attribution
  19. * as the author of the parts of the library used.
  20. * This can be in the form of a textual message at program startup or
  21. * in documentation (online or textual) provided with the package.
  22. *
  23. * Redistribution and use in source and binary forms, with or without
  24. * modification, are permitted provided that the following conditions
  25. * are met:
  26. * 1. Redistributions of source code must retain the copyright
  27. * notice, this list of conditions and the following disclaimer.
  28. * 2. Redistributions in binary form must reproduce the above copyright
  29. * notice, this list of conditions and the following disclaimer in the
  30. * documentation and/or other materials provided with the distribution.
  31. * 3. All advertising materials mentioning features or use of this software
  32. * must display the following acknowledgement:
  33. * "This product includes cryptographic software written by
  34. * Eric Young (eay@cryptsoft.com)"
  35. * The word 'cryptographic' can be left out if the rouines from the library
  36. * being used are not cryptographic related :-).
  37. * 4. If you include any Windows specific code (or a derivative thereof) from
  38. * the apps directory (application code) you must include an acknowledgement:
  39. * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40. *
  41. * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44. * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51. * SUCH DAMAGE.
  52. *
  53. * The licence and distribution terms for any publically available version or
  54. * derivative of this code cannot be changed. i.e. this code cannot simply be
  55. * copied and put under another distribution licence
  56. * [including the GNU Public Licence.]
  57. */
  58. #include <stdio.h>
  59. #include <errno.h>
  60. #define USE_SOCKETS
  61. #include "ssl_locl.h"
  62. #include <openssl/evp.h>
  63. #include <openssl/buffer.h>
  64. int ssl23_write_bytes(SSL *s)
  65. {
  66. int i,num,tot;
  67. char *buf;
  68. buf=s->init_buf->data;
  69. tot=s->init_off;
  70. num=s->init_num;
  71. for (;;)
  72. {
  73. s->rwstate=SSL_WRITING;
  74. i=BIO_write(s->wbio,&(buf[tot]),num);
  75. if (i <= 0)
  76. {
  77. s->init_off=tot;
  78. s->init_num=num;
  79. return(i);
  80. }
  81. s->rwstate=SSL_NOTHING;
  82. if (i == num) return(tot+i);
  83. num-=i;
  84. tot+=i;
  85. }
  86. }
  87. /* return regularly only when we have read (at least) 'n' bytes */
  88. int ssl23_read_bytes(SSL *s, int n)
  89. {
  90. unsigned char *p;
  91. int j;
  92. if (s->packet_length < (unsigned int)n)
  93. {
  94. p=s->packet;
  95. for (;;)
  96. {
  97. s->rwstate=SSL_READING;
  98. j=BIO_read(s->rbio,(char *)&(p[s->packet_length]),
  99. n-s->packet_length);
  100. if (j <= 0)
  101. return(j);
  102. s->rwstate=SSL_NOTHING;
  103. s->packet_length+=j;
  104. if (s->packet_length >= (unsigned int)n)
  105. return(s->packet_length);
  106. }
  107. }
  108. return(n);
  109. }