C++ (Cpp) _libssh2_rsa_new Examples

Example #1

File: hostkey.c Project: minodada/libssh2

/*
 * hostkey_method_ssh_rsa_init
 *
 * Initialize the server hostkey working area with e/n pair
 */
static int
hostkey_method_ssh_rsa_init(LIBSSH2_SESSION * session,
                            const unsigned char *hostkey_data,
                            size_t hostkey_data_len,
                            void **abstract)
{
    libssh2_rsa_ctx *rsactx;
    const unsigned char *s, *e, *n;
    unsigned long len, e_len, n_len;
    int ret;

    (void) hostkey_data_len;

    if (*abstract) {
        hostkey_method_ssh_rsa_dtor(session, abstract);
        *abstract = NULL;
    }

    s = hostkey_data;
    len = _libssh2_ntohu32(s);
    s += 4;

    if (len != 7 || strncmp((char *) s, "ssh-rsa", 7) != 0) {
        return -1;
    }
    s += 7;

    e_len = _libssh2_ntohu32(s);
    s += 4;

    e = s;
    s += e_len;
    n_len = _libssh2_ntohu32(s);
    s += 4;
    n = s;

    ret = _libssh2_rsa_new(&rsactx, e, e_len, n, n_len, NULL, 0,
                           NULL, 0, NULL, 0, NULL, 0, NULL, 0, NULL, 0);
    if (ret) {
        return -1;
    }

    *abstract = rsactx;

    return 0;
}

Example #2

File: libgcrypt.c Project: dmiller-nmap/libssh2

int
_libssh2_rsa_new_private(libssh2_rsa_ctx ** rsa,
                         LIBSSH2_SESSION * session,
                         const char *filename, unsigned const char *passphrase)
{
    FILE *fp;
    unsigned char *data, *save_data;
    unsigned int datalen;
    int ret;
    unsigned char *n, *e, *d, *p, *q, *e1, *e2, *coeff;
    unsigned int nlen, elen, dlen, plen, qlen, e1len, e2len, coefflen;

    fp = fopen(filename, FOPEN_READTEXT);
    if(!fp) {
        return -1;
    }

    ret = _libssh2_pem_parse(session,
                             "-----BEGIN RSA PRIVATE KEY-----",
                             "-----END RSA PRIVATE KEY-----",
                             passphrase,
                             fp, &data, &datalen);
    fclose(fp);
    if(ret) {
        return -1;
    }

    save_data = data;

    if(_libssh2_pem_decode_sequence(&data, &datalen)) {
        ret = -1;
        goto fail;
    }
/* First read Version field (should be 0). */
    ret = _libssh2_pem_decode_integer(&data, &datalen, &n, &nlen);
    if(ret != 0 || (nlen != 1 && *n != '\0')) {
        ret = -1;
        goto fail;
    }

    ret = _libssh2_pem_decode_integer(&data, &datalen, &n, &nlen);
    if(ret != 0) {
        ret = -1;
        goto fail;
    }

    ret = _libssh2_pem_decode_integer(&data, &datalen, &e, &elen);
    if(ret != 0) {
        ret = -1;
        goto fail;
    }

    ret = _libssh2_pem_decode_integer(&data, &datalen, &d, &dlen);
    if(ret != 0) {
        ret = -1;
        goto fail;
    }

    ret = _libssh2_pem_decode_integer(&data, &datalen, &p, &plen);
    if(ret != 0) {
        ret = -1;
        goto fail;
    }

    ret = _libssh2_pem_decode_integer(&data, &datalen, &q, &qlen);
    if(ret != 0) {
        ret = -1;
        goto fail;
    }

    ret = _libssh2_pem_decode_integer(&data, &datalen, &e1, &e1len);
    if(ret != 0) {
        ret = -1;
        goto fail;
    }

    ret = _libssh2_pem_decode_integer(&data, &datalen, &e2, &e2len);
    if(ret != 0) {
        ret = -1;
        goto fail;
    }

    ret = _libssh2_pem_decode_integer(&data, &datalen, &coeff, &coefflen);
    if(ret != 0) {
        ret = -1;
        goto fail;
    }

    if(_libssh2_rsa_new(rsa, e, elen, n, nlen, d, dlen, p, plen,
                         q, qlen, e1, e1len, e2, e2len, coeff, coefflen)) {
        ret = -1;
        goto fail;
    }

    ret = 0;

  fail:
    LIBSSH2_FREE(session, save_data);
    return ret;
}