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Diffstat (limited to 'thirdparty/openssl/crypto/des/enc_writ.c')
| -rw-r--r-- | thirdparty/openssl/crypto/des/enc_writ.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/des/enc_writ.c b/thirdparty/openssl/crypto/des/enc_writ.c new file mode 100644 index 0000000000..bfaabde516 --- /dev/null +++ b/thirdparty/openssl/crypto/des/enc_writ.c @@ -0,0 +1,182 @@ +/* crypto/des/enc_writ.c */ +/* 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 <errno.h> +#include <time.h> +#include <stdio.h> +#include "cryptlib.h" +#include "des_locl.h" +#include <openssl/rand.h> + +/*- + * WARNINGS: + * + * - The data format used by DES_enc_write() and DES_enc_read() + * has a cryptographic weakness: When asked to write more + * than MAXWRITE bytes, DES_enc_write will split the data + * into several chunks that are all encrypted + * using the same IV. So don't use these functions unless you + * are sure you know what you do (in which case you might + * not want to use them anyway). + * + * - This code cannot handle non-blocking sockets. + */ + +int DES_enc_write(int fd, const void *_buf, int len, + DES_key_schedule *sched, DES_cblock *iv) +{ +#if defined(OPENSSL_NO_POSIX_IO) + return (-1); +#else +# ifdef _LIBC + extern unsigned long time(); + extern int write(); +# endif + const unsigned char *buf = _buf; + long rnum; + int i, j, k, outnum; + static unsigned char *outbuf = NULL; + unsigned char shortbuf[8]; + unsigned char *p; + const unsigned char *cp; + static int start = 1; + + if (len < 0) + return -1; + + if (outbuf == NULL) { + outbuf = OPENSSL_malloc(BSIZE + HDRSIZE); + if (outbuf == NULL) + return (-1); + } + /* + * If we are sending less than 8 bytes, the same char will look the same + * if we don't pad it out with random bytes + */ + if (start) { + start = 0; + } + + /* lets recurse if we want to send the data in small chunks */ + if (len > MAXWRITE) { + j = 0; + for (i = 0; i < len; i += k) { + k = DES_enc_write(fd, &(buf[i]), + ((len - i) > MAXWRITE) ? MAXWRITE : (len - i), + sched, iv); + if (k < 0) + return (k); + else + j += k; + } + return (j); + } + + /* write length first */ + p = outbuf; + l2n(len, p); + + /* pad short strings */ + if (len < 8) { + cp = shortbuf; + memcpy(shortbuf, buf, len); + if (RAND_pseudo_bytes(shortbuf + len, 8 - len) < 0) { + return -1; + } + rnum = 8; + } else { + cp = buf; + rnum = ((len + 7) / 8 * 8); /* round up to nearest eight */ + } + + if (DES_rw_mode & DES_PCBC_MODE) + DES_pcbc_encrypt(cp, &(outbuf[HDRSIZE]), (len < 8) ? 8 : len, sched, + iv, DES_ENCRYPT); + else + DES_cbc_encrypt(cp, &(outbuf[HDRSIZE]), (len < 8) ? 8 : len, sched, + iv, DES_ENCRYPT); + + /* output */ + outnum = rnum + HDRSIZE; + + for (j = 0; j < outnum; j += i) { + /* + * eay 26/08/92 I was not doing writing from where we got up to. + */ +# ifndef _WIN32 + i = write(fd, (void *)&(outbuf[j]), outnum - j); +# else + i = _write(fd, (void *)&(outbuf[j]), outnum - j); +# endif + if (i == -1) { +# ifdef EINTR + if (errno == EINTR) + i = 0; + else +# endif + /* + * This is really a bad error - very bad It will stuff-up + * both ends. + */ + return (-1); + } + } + + return (len); +#endif /* OPENSSL_NO_POSIX_IO */ +} |