Return to ntlsha.cpp CVS log

Up to [local] / OpenXM / src / ox_ntl / crypt / sha1

Annotation of OpenXM/src/ox_ntl/crypt/sha1/ntlsha.cpp, Revision 1.2

1.2     ! iwane       1: /* $OpenXM: OpenXM/src/ox_ntl/crypt/sha1/ntlsha.cpp,v 1.1 2004/01/12 13:16:28 iwane Exp $ */
        !             2: /* RFC 3174 -- see sha1.c */
1.1       iwane       3:
                      4: #include <NTL/ZZ.h>
                      5:
                      6: #include <stdlib.h>
                      7:
                      8: #include "sha1.h"
                      9:
                     10: int
                     11: ntl_sha1_h(ZZ &sha, const ZZ &m, unsigned int *t)
                     12: {
                     13:        unsigned char h[20]; // 160 bit
                     14:        unsigned char *msg, msg_buf[1024];
                     15:        unsigned int msglen = sizeof(msg);
                     16:        unsigned int i;
                     17:        unsigned char uch;
                     18:        int ret;
                     19:
                     20:        msglen = NumBytes(m);
                     21:        if (msglen <= sizeof(msg)) {
                     22:                msg = msg_buf;
                     23:        } else {
                     24:                msg = new unsigned char[msglen];
                     25:        }
                     26:
                     27:        BytesFromZZ(msg, m, msglen);
                     28:
                     29:        for (i = 0; i < msglen / 2; i++) {
                     30:                uch = msg[i];
                     31:                msg[i] = msg[msglen - i - 1];
                     32:                msg[msglen - i - 1] = uch;
                     33:        }
                     34:
                     35:        if (t == NULL) {
                     36:                ret = sha1(h, msg, msglen);
                     37:        } else {
                     38:                ret = sha1_h(h, msg, msglen, t);
                     39:
                     40:        }
                     41:
                     42:        if (msg != msg_buf)
                     43:                delete [] msg;
                     44:
                     45:        for (i = 0; i < sizeof(h) / 2; i++) {
                     46:                uch = h[i];
                     47:                h[i] = h[sizeof(h) - i - 1];
                     48:                h[sizeof(h) - i - 1] = uch;
                     49:        }
                     50:
                     51:        ZZFromBytes(sha, h, sizeof(h));
                     52:
                     53:        return (ret);
                     54: }
                     55:
                     56: int
                     57: ntl_sha1(ZZ &sha, const ZZ &m)
                     58: {
                     59:        return (ntl_sha1_h(sha, m, NULL));
                     60: }
                     61:
                     62: