static int read_dsa_privatekey(FILE *fp, gcry_sexp_t *r, ssh_auth_callback cb,
void *userdata, const char *desc) {
ssh_buffer buffer = NULL;
ssh_string p = NULL;
ssh_string q = NULL;
ssh_string g = NULL;
ssh_string y = NULL;
ssh_string x = NULL;
ssh_string v = NULL;
int rc = 1;
buffer = privatekey_file_to_buffer(fp, TYPE_DSS, cb, userdata, desc);
if (buffer == NULL) {
return 0;
}
if (!asn1_check_sequence(buffer)) {
buffer_free(buffer);
return 0;
}
v = asn1_get_int(buffer);
if (ntohl(v->size) != 1 || v->string[0] != 0) {
buffer_free(buffer);
return 0;
}
p = asn1_get_int(buffer);
q = asn1_get_int(buffer);
g = asn1_get_int(buffer);
y = asn1_get_int(buffer);
x = asn1_get_int(buffer);
buffer_free(buffer);
if (p == NULL || q == NULL || g == NULL || y == NULL || x == NULL) {
rc = 0;
goto error;
}
if (gcry_sexp_build(r, NULL,
"(private-key(dsa(p %b)(q %b)(g %b)(y %b)(x %b)))",
ntohl(p->size), p->string,
ntohl(q->size), q->string,
ntohl(g->size), g->string,
ntohl(y->size), y->string,
ntohl(x->size), x->string)) {
rc = 0;
}
error:
string_free(p);
string_free(q);
string_free(g);
string_free(y);
string_free(x);
string_free(v);
return rc;
}
static int b64decode_dsa_privatekey(const char *pkey, gcry_sexp_t *r, ssh_auth_callback cb,
void *userdata, const char *desc) {
const unsigned char *data;
ssh_buffer buffer = NULL;
ssh_string p = NULL;
ssh_string q = NULL;
ssh_string g = NULL;
ssh_string y = NULL;
ssh_string x = NULL;
ssh_string v = NULL;
int rc = 1;
buffer = privatekey_string_to_buffer(pkey, SSH_KEYTYPE_DSS, cb, userdata, desc);
if (buffer == NULL) {
return 0;
}
if (!asn1_check_sequence(buffer)) {
ssh_buffer_free(buffer);
return 0;
}
v = asn1_get_int(buffer);
if (v == NULL) {
ssh_buffer_free(buffer);
return 0;
}
data = ssh_string_data(v);
if (ssh_string_len(v) != 1 || data[0] != 0) {
ssh_buffer_free(buffer);
return 0;
}
p = asn1_get_int(buffer);
q = asn1_get_int(buffer);
g = asn1_get_int(buffer);
y = asn1_get_int(buffer);
x = asn1_get_int(buffer);
ssh_buffer_free(buffer);
if (p == NULL || q == NULL || g == NULL || y == NULL || x == NULL) {
rc = 0;
goto error;
}
if (gcry_sexp_build(r, NULL,
"(private-key(dsa(p %b)(q %b)(g %b)(y %b)(x %b)))",
ssh_string_len(p), ssh_string_data(p),
ssh_string_len(q), ssh_string_data(q),
ssh_string_len(g), ssh_string_data(g),
ssh_string_len(y), ssh_string_data(y),
ssh_string_len(x), ssh_string_data(x))) {
rc = 0;
}
error:
ssh_string_free(p);
ssh_string_free(q);
ssh_string_free(g);
ssh_string_free(y);
ssh_string_free(x);
ssh_string_free(v);
return rc;
}
static int b64decode_rsa_privatekey(const char *pkey, gcry_sexp_t *r,
ssh_auth_callback cb, void *userdata, const char *desc) {
const unsigned char *data;
ssh_string n = NULL;
ssh_string e = NULL;
ssh_string d = NULL;
ssh_string p = NULL;
ssh_string q = NULL;
ssh_string unused1 = NULL;
ssh_string unused2 = NULL;
ssh_string u = NULL;
ssh_string v = NULL;
ssh_buffer buffer = NULL;
int rc = 1;
buffer = privatekey_string_to_buffer(pkey, SSH_KEYTYPE_RSA, cb, userdata, desc);
if (buffer == NULL) {
return 0;
}
if (!asn1_check_sequence(buffer)) {
ssh_buffer_free(buffer);
return 0;
}
v = asn1_get_int(buffer);
if (v == NULL) {
ssh_buffer_free(buffer);
return 0;
}
data = ssh_string_data(v);
if (ssh_string_len(v) != 1 || data[0] != 0) {
ssh_buffer_free(buffer);
return 0;
}
n = asn1_get_int(buffer);
e = asn1_get_int(buffer);
d = asn1_get_int(buffer);
q = asn1_get_int(buffer);
p = asn1_get_int(buffer);
unused1 = asn1_get_int(buffer);
unused2 = asn1_get_int(buffer);
u = asn1_get_int(buffer);
ssh_buffer_free(buffer);
if (n == NULL || e == NULL || d == NULL || p == NULL || q == NULL ||
unused1 == NULL || unused2 == NULL|| u == NULL) {
rc = 0;
goto error;
}
if (gcry_sexp_build(r, NULL,
"(private-key(rsa(n %b)(e %b)(d %b)(p %b)(q %b)(u %b)))",
ssh_string_len(n), ssh_string_data(n),
ssh_string_len(e), ssh_string_data(e),
ssh_string_len(d), ssh_string_data(d),
ssh_string_len(p), ssh_string_data(p),
ssh_string_len(q), ssh_string_data(q),
ssh_string_len(u), ssh_string_data(u))) {
rc = 0;
}
error:
ssh_string_free(n);
ssh_string_free(e);
ssh_string_free(d);
ssh_string_free(p);
ssh_string_free(q);
ssh_string_free(unused1);
ssh_string_free(unused2);
ssh_string_free(u);
ssh_string_free(v);
return rc;
}
static int read_rsa_privatekey(FILE *fp, gcry_sexp_t *r,
ssh_auth_callback cb, void *userdata, const char *desc) {
ssh_string n = NULL;
ssh_string e = NULL;
ssh_string d = NULL;
ssh_string p = NULL;
ssh_string q = NULL;
ssh_string unused1 = NULL;
ssh_string unused2 = NULL;
ssh_string u = NULL;
ssh_string v = NULL;
ssh_buffer buffer = NULL;
int rc = 1;
buffer = privatekey_file_to_buffer(fp, TYPE_RSA, cb, userdata, desc);
if (buffer == NULL) {
return 0;
}
if (!asn1_check_sequence(buffer)) {
buffer_free(buffer);
return 0;
}
v = asn1_get_int(buffer);
if (ntohl(v->size) != 1 || v->string[0] != 0) {
buffer_free(buffer);
return 0;
}
n = asn1_get_int(buffer);
e = asn1_get_int(buffer);
d = asn1_get_int(buffer);
q = asn1_get_int(buffer);
p = asn1_get_int(buffer);
unused1 = asn1_get_int(buffer);
unused2 = asn1_get_int(buffer);
u = asn1_get_int(buffer);
buffer_free(buffer);
if (n == NULL || e == NULL || d == NULL || p == NULL || q == NULL ||
unused1 == NULL || unused2 == NULL|| u == NULL) {
rc = 0;
goto error;
}
if (gcry_sexp_build(r, NULL,
"(private-key(rsa(n %b)(e %b)(d %b)(p %b)(q %b)(u %b)))",
ntohl(n->size), n->string,
ntohl(e->size), e->string,
ntohl(d->size), d->string,
ntohl(p->size), p->string,
ntohl(q->size), q->string,
ntohl(u->size), u->string)) {
rc = 0;
}
error:
string_free(n);
string_free(e);
string_free(d);
string_free(p);
string_free(q);
string_free(unused1);
string_free(unused2);
string_free(u);
string_free(v);
return rc;
}
