Add error checking to publickey to string functions.
git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@434 7dcaeef0-15fb-0310-b436-a5af3365683c
Этот коммит содержится в:
Andreas Schneider
родитель
8333393470
Коммит
40ddc76e62
255
libssh/keys.c
255
libssh/keys.c
@ -462,79 +462,151 @@ error:
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}
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#ifdef HAVE_LIBGCRYPT
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static void dsa_public_to_string(gcry_sexp_t key, BUFFER *buffer){
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static int dsa_public_to_string(gcry_sexp_t key, BUFFER *buffer) {
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#elif defined HAVE_LIBCRYPTO
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static void dsa_public_to_string(DSA *key, BUFFER *buffer){
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static int dsa_public_to_string(DSA *key, BUFFER *buffer) {
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#endif
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STRING *p,*q,*g,*n;
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STRING *p = NULL;
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STRING *q = NULL;
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STRING *g = NULL;
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STRING *n = NULL;
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int rc = -1;
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#ifdef HAVE_LIBGCRYPT
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const char *tmp;
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size_t size;
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gcry_sexp_t sexp;
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sexp=gcry_sexp_find_token(key,"p",0);
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tmp=gcry_sexp_nth_data(sexp,1,&size);
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p=string_new(size);
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string_fill(p,(char *)tmp,size);
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gcry_sexp_release(sexp);
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sexp=gcry_sexp_find_token(key,"q",0);
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tmp=gcry_sexp_nth_data(sexp,1,&size);
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q=string_new(size);
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string_fill(q,(char *)tmp,size);
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gcry_sexp_release(sexp);
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sexp=gcry_sexp_find_token(key,"g",0);
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tmp=gcry_sexp_nth_data(sexp,1,&size);
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g=string_new(size);
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string_fill(g,(char *)tmp,size);
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gcry_sexp_release(sexp);
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sexp=gcry_sexp_find_token(key,"y",0);
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tmp=gcry_sexp_nth_data(sexp,1,&size);
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n=string_new(size);
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string_fill(n,(char *)tmp,size);
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gcry_sexp_release(sexp);
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const char *tmp = NULL;
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size_t size;
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gcry_sexp_t sexp;
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sexp = gcry_sexp_find_token(key, "p", 0);
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tmp = gcry_sexp_nth_data(sexp, 1, &size);
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p = string_new(size);
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if (p == NULL) {
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goto error;
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}
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string_fill(p, (char *) tmp, size);
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gcry_sexp_release(sexp);
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sexp = gcry_sexp_find_token(key, "q", 0);
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tmp = gcry_sexp_nth_data(sexp, 1, &size);
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q = string_new(size);
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if (q == NULL) {
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goto error;
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}
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string_fill(q, (char *) tmp, size);
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gcry_sexp_release(sexp);
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sexp = gcry_sexp_find_token(key, "g", 0);
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tmp = gcry_sexp_nth_data(sexp, 1, &size);
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g = string_new(size);
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if (g == NULL) {
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goto error;
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}
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string_fill(g, (char *) tmp, size);
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gcry_sexp_release(sexp);
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sexp = gcry_sexp_find_token(key, "y", 0);
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tmp = gcry_sexp_nth_data(sexp, 1, &size);
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n = string_new(size);
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if (n == NULL) {
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goto error;
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}
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string_fill(n, (char *) tmp, size);
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gcry_sexp_release(sexp);
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#elif defined HAVE_LIBCRYPTO
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p=make_bignum_string(key->p);
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q=make_bignum_string(key->q);
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g=make_bignum_string(key->g);
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n=make_bignum_string(key->pub_key);
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#endif
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buffer_add_ssh_string(buffer,p);
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buffer_add_ssh_string(buffer,q);
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buffer_add_ssh_string(buffer,g);
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buffer_add_ssh_string(buffer,n);
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free(p);
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free(q);
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free(g);
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free(n);
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p = make_bignum_string(key->p);
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q = make_bignum_string(key->q);
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g = make_bignum_string(key->g);
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n = make_bignum_string(key->pub_key);
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if (p == NULL || q == NULL || g == NULL || n == NULL) {
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goto error;
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}
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#endif /* HAVE_LIBCRYPTO */
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if (buffer_add_ssh_string(buffer, p) < 0) {
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goto error;
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}
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if (buffer_add_ssh_string(buffer, q) < 0) {
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goto error;
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}
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if (buffer_add_ssh_string(buffer, g) < 0) {
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goto error;
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}
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if (buffer_add_ssh_string(buffer, n) < 0) {
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goto error;
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}
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rc = 0;
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error:
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string_burn(p);
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string_free(p);
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string_burn(q);
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string_free(q);
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string_burn(g);
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string_free(g);
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string_burn(n);
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string_free(n);
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return rc;
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}
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#ifdef HAVE_LIBGCRYPT
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static void rsa_public_to_string(gcry_sexp_t key, BUFFER *buffer){
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static int rsa_public_to_string(gcry_sexp_t key, BUFFER *buffer) {
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#elif defined HAVE_LIBCRYPTO
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static void rsa_public_to_string(RSA *key, BUFFER *buffer){
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static int rsa_public_to_string(RSA *key, BUFFER *buffer) {
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#endif
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STRING *e, *n;
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STRING *e = NULL;
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STRING *n = NULL;
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int rc = -1;
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#ifdef HAVE_LIBGCRYPT
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const char *tmp;
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size_t size;
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gcry_sexp_t sexp;
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sexp=gcry_sexp_find_token(key,"n",0);
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tmp=gcry_sexp_nth_data(sexp,1,&size);
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n=string_new(size);
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string_fill(n,(char *)tmp,size);
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gcry_sexp_release(sexp);
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sexp=gcry_sexp_find_token(key,"e",0);
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tmp=gcry_sexp_nth_data(sexp,1,&size);
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e=string_new(size);
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string_fill(e,(char *)tmp,size);
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gcry_sexp_release(sexp);
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const char *tmp;
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size_t size;
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gcry_sexp_t sexp;
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sexp = gcry_sexp_find_token(key, "n", 0);
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tmp = gcry_sexp_nth_data(sexp, 1, &size);
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n = string_new(size);
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if (n == NULL) {
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goto error;
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}
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string_fill(n, (char *) tmp, size);
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gcry_sexp_release(sexp);
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sexp = gcry_sexp_find_token(key, "e", 0);
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tmp = gcry_sexp_nth_data(sexp, 1, &size);
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e = string_new(size);
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if (e == NULL) {
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goto error;
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}
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string_fill(e, (char *) tmp, size);
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gcry_sexp_release(sexp);
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#elif defined HAVE_LIBCRYPTO
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e=make_bignum_string(key->e);
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n=make_bignum_string(key->n);
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e = make_bignum_string(key->e);
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n = make_bignum_string(key->n);
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if (e == NULL || n == NULL) {
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goto error;
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}
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#endif
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buffer_add_ssh_string(buffer,e);
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buffer_add_ssh_string(buffer,n);
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free(e);
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free(n);
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if (buffer_add_ssh_string(buffer, e) < 0) {
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goto error;
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}
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if (buffer_add_ssh_string(buffer, n) < 0) {
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goto error;
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}
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rc = 0;
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error:
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string_burn(e);
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string_free(e);
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string_burn(n);
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string_free(n);
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return rc;
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}
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/** \brief makes a SSH String out of a PUBLIC_KEY object
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@ -542,27 +614,46 @@ static void rsa_public_to_string(RSA *key, BUFFER *buffer){
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* \returns a SSH String containing the public key
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* \see string_free()
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*/
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STRING *publickey_to_string(PUBLIC_KEY *key){
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STRING *type;
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STRING *ret;
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BUFFER *buf;
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type=string_from_char(ssh_type_to_char(key->type));
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buf=buffer_new();
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buffer_add_ssh_string(buf,type);
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switch(key->type){
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case TYPE_DSS:
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dsa_public_to_string(key->dsa_pub,buf);
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break;
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case TYPE_RSA:
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case TYPE_RSA1:
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rsa_public_to_string(key->rsa_pub,buf);
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break;
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}
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ret=string_new(buffer_get_len(buf));
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string_fill(ret,buffer_get(buf),buffer_get_len(buf));
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buffer_free(buf);
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free(type);
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return ret;
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STRING *publickey_to_string(PUBLIC_KEY *key) {
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STRING *type = NULL;
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STRING *ret = NULL;
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BUFFER *buf = NULL;
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buf = buffer_new();
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if (buf == NULL) {
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return NULL;
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}
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type = string_from_char(ssh_type_to_char(key->type));
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if (type == NULL) {
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goto error;
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}
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buffer_add_ssh_string(buf, type);
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switch(key->type){
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case TYPE_DSS:
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if (dsa_public_to_string(key->dsa_pub,buf) < 0) {
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goto error;
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}
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break;
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case TYPE_RSA:
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case TYPE_RSA1:
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if (rsa_public_to_string(key->rsa_pub,buf) < 0) {
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goto error;
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}
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break;
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}
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ret = string_new(buffer_get_len(buf));
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if (ret == NULL) {
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goto error;
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}
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string_fill(ret, buffer_get(buf), buffer_get_len(buf));
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error:
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buffer_free(buf);
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string_free(type);
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return ret;
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}
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/* Signature decoding functions */
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