C++ (Cpp) ADD_BIGNUM示例

示例#1

文件： sshdss.c 项目： rdebath/sgt

static char *dss_fingerprint(void *key) {
    struct dss_key *dss = (struct dss_key *)key;
    struct MD5Context md5c;
    unsigned char digest[16], lenbuf[4];
    char buffer[16*3+40];
    char *ret;
    int numlen, i;

    MD5Init(&md5c);
    MD5Update(&md5c, "\0\0\0\7ssh-dss", 11);

#define ADD_BIGNUM(bignum) \
    numlen = (ssh1_bignum_bitcount(bignum)+8)/8; \
    PUT_32BIT(lenbuf, numlen); MD5Update(&md5c, lenbuf, 4); \
    for (i = numlen; i-- ;) { \
        unsigned char c = bignum_byte(bignum, i); \
        MD5Update(&md5c, &c, 1); \
    }
    ADD_BIGNUM(dss->p);
    ADD_BIGNUM(dss->q);
    ADD_BIGNUM(dss->g);
    ADD_BIGNUM(dss->y);
#undef ADD_BIGNUM

    MD5Final(digest, &md5c);

    sprintf(buffer, "%d ", ssh1_bignum_bitcount(dss->p));
    for (i = 0; i < 16; i++)
        sprintf(buffer+strlen(buffer), "%s%02x", i?":":"", digest[i]);
    ret = smalloc(strlen(buffer)+1);
    if (ret)
        strcpy(ret, buffer);
    return ret;
}

示例#2

文件： SSHRSA.C 项目： marsupial/rikiglue

static char *rsa2_fingerprint(void *key)
{
    struct RSAKey *rsa = (struct RSAKey *) key;
    struct MD5Context md5c;
    unsigned char digest[16], lenbuf[4];
    char buffer[16 * 3 + 40];
    char *ret;
    int numlen, i;

    MD5Init(&md5c);
    MD5Update(&md5c, (unsigned char *)"\0\0\0\7ssh-rsa", 11);

#define ADD_BIGNUM(bignum) \
    numlen = (bignum_bitcount(bignum)+8)/8; \
    PUT_32BIT(lenbuf, numlen); MD5Update(&md5c, lenbuf, 4); \
    for (i = numlen; i-- ;) { \
        unsigned char c = bignum_byte(bignum, i); \
        MD5Update(&md5c, &c, 1); \
    }
    ADD_BIGNUM(rsa->exponent);
    ADD_BIGNUM(rsa->modulus);
#undef ADD_BIGNUM

    MD5Final(digest, &md5c);

    sprintf(buffer, "ssh-rsa %d ", bignum_bitcount(rsa->modulus));
    for (i = 0; i < 16; i++)
	sprintf(buffer + strlen(buffer), "%s%02x", i ? ":" : "",
		digest[i]);
    ret = snewn(strlen(buffer) + 1, char);
    if (ret)
	strcpy(ret, buffer);
    return ret;
}

示例#3

文件： sshdss.c 项目： GoogleCloudPlatform/gcloud-compute-ssh

static char *dss_fingerprint(void *key)
{
    struct dss_key *dss = (struct dss_key *) key;
    struct MD5Context md5c;
    unsigned char digest[16], lenbuf[4];
    char buffer[16 * 3 + 40];
    size_t pos;
    int numlen, i;

    MD5Init(&md5c);
    MD5Update(&md5c, (unsigned char *)"\0\0\0\7ssh-dss", 11);

#define ADD_BIGNUM(bignum) \
    numlen = (bignum_bitcount(bignum)+8)/8; \
    PUT_32BIT(lenbuf, numlen); MD5Update(&md5c, lenbuf, 4); \
    for (i = numlen; i-- ;) { \
        unsigned char c = bignum_byte(bignum, i); \
        MD5Update(&md5c, &c, 1); \
    }
    ADD_BIGNUM(dss->p);
    ADD_BIGNUM(dss->q);
    ADD_BIGNUM(dss->g);
    ADD_BIGNUM(dss->y);
#undef ADD_BIGNUM

    MD5Final(digest, &md5c);

    pos = szprintf(buffer, sizeof(buffer), "ssh-dss %d ", bignum_bitcount(dss->p));
    for (i = 0; i < 16; i++)
	pos += szprintf(buffer + pos, sizeof(buffer) - pos, "%s%02x", i ? ":" : "",
		digest[i]);
    return dupstr(buffer);
}