| 1 | #define SSH2_GSS_OIDTYPE 0x06 |
| 2 | typedef void *Ssh_gss_ctx; |
| 3 | typedef void *Ssh_gss_name; |
| 4 | |
| 5 | typedef enum Ssh_gss_stat { |
| 6 | SSH_GSS_OK = 0, |
| 7 | SSH_GSS_S_CONTINUE_NEEDED, |
| 8 | SSH_GSS_NO_MEM, |
| 9 | SSH_GSS_BAD_HOST_NAME, |
| 10 | SSH_GSS_FAILURE |
| 11 | } Ssh_gss_stat; |
| 12 | |
| 13 | #define SSH_GSS_S_COMPLETE SSH_GSS_OK |
| 14 | |
| 15 | typedef struct Ssh_gss_buf { |
| 16 | int len; |
| 17 | char *data; |
| 18 | } Ssh_gss_buf; |
| 19 | |
| 20 | #define SSH_GSS_EMPTY_BUF (Ssh_gss_buf) {0,NULL} |
| 21 | |
| 22 | #define SSH_GSS_CLEAR_BUF(buf) do { \ |
| 23 | (*buf).len = 0; \ |
| 24 | (*buf).data = NULL; \ |
| 25 | } while (0) |
| 26 | |
| 27 | /* Functions, provided by either wingss.c or uxgss.c */ |
| 28 | |
| 29 | /* |
| 30 | * Do startup-time initialisation for using GSSAPI. (On Windows, |
| 31 | * for instance, this dynamically loads the GSSAPI DLL and |
| 32 | * retrieves some function pointers.) |
| 33 | * |
| 34 | * Return value is 1 on success, or 0 if initialisation failed. |
| 35 | * |
| 36 | * May be called multiple times (since the most convenient place |
| 37 | * to call it _from_ is the ssh.c setup code), and will harmlessly |
| 38 | * return success if already initialised. |
| 39 | */ |
| 40 | int ssh_gss_init(void); |
| 41 | |
| 42 | /* |
| 43 | * Fills in buf with a string describing the GSSAPI mechanism in |
| 44 | * use. buf->data is not dynamically allocated. |
| 45 | */ |
| 46 | Ssh_gss_stat ssh_gss_indicate_mech(Ssh_gss_buf *buf); |
| 47 | |
| 48 | /* |
| 49 | * Converts a name such as a hostname into a GSSAPI internal form, |
| 50 | * which is placed in "out". The result should be freed by |
| 51 | * ssh_gss_release_name(). |
| 52 | */ |
| 53 | Ssh_gss_stat ssh_gss_import_name(char *in, Ssh_gss_name *out); |
| 54 | |
| 55 | /* |
| 56 | * Frees the contents of an Ssh_gss_name structure filled in by |
| 57 | * ssh_gss_import_name(). |
| 58 | */ |
| 59 | Ssh_gss_stat ssh_gss_release_name(Ssh_gss_name *name); |
| 60 | |
| 61 | /* |
| 62 | * The main GSSAPI security context setup function. The "out" |
| 63 | * parameter will need to be freed by ssh_gss_free_tok. |
| 64 | */ |
| 65 | Ssh_gss_stat ssh_gss_init_sec_context(Ssh_gss_ctx *ctx, Ssh_gss_name name, int delegate, |
| 66 | Ssh_gss_buf *in, Ssh_gss_buf *out); |
| 67 | |
| 68 | /* |
| 69 | * Frees the contents of an Ssh_gss_buf filled in by |
| 70 | * ssh_gss_init_sec_context(). Do not accidentally call this on |
| 71 | * something filled in by ssh_gss_get_mic() (which requires a |
| 72 | * different free function) or something filled in by any other |
| 73 | * way. |
| 74 | */ |
| 75 | Ssh_gss_stat ssh_gss_free_tok(Ssh_gss_buf *); |
| 76 | |
| 77 | /* |
| 78 | * Acquires the credentials to perform authentication in the first |
| 79 | * place. Needs to be freed by ssh_gss_release_cred(). |
| 80 | */ |
| 81 | Ssh_gss_stat ssh_gss_acquire_cred(Ssh_gss_ctx *); |
| 82 | |
| 83 | /* |
| 84 | * Frees the contents of an Ssh_gss_ctx filled in by |
| 85 | * ssh_gss_acquire_cred(). |
| 86 | */ |
| 87 | Ssh_gss_stat ssh_gss_release_cred(Ssh_gss_ctx *); |
| 88 | |
| 89 | /* |
| 90 | * Gets a MIC for some input data. "out" needs to be freed by |
| 91 | * ssh_gss_free_mic(). |
| 92 | */ |
| 93 | Ssh_gss_stat ssh_gss_get_mic(Ssh_gss_ctx ctx, Ssh_gss_buf *in, |
| 94 | Ssh_gss_buf *out); |
| 95 | |
| 96 | /* |
| 97 | * Frees the contents of an Ssh_gss_buf filled in by |
| 98 | * ssh_gss_get_mic(). Do not accidentally call this on something |
| 99 | * filled in by ssh_gss_init_sec_context() (which requires a |
| 100 | * different free function) or something filled in by any other |
| 101 | * way. |
| 102 | */ |
| 103 | Ssh_gss_stat ssh_gss_free_mic(Ssh_gss_buf *); |
| 104 | |
| 105 | /* |
| 106 | * Return an error message after authentication failed. The |
| 107 | * message string is returned in "buf", with buf->len giving the |
| 108 | * number of characters of printable message text and buf->data |
| 109 | * containing one more character which is a trailing NUL. |
| 110 | * buf->data should be manually freed by the caller. |
| 111 | */ |
| 112 | Ssh_gss_stat ssh_gss_display_status(Ssh_gss_ctx, Ssh_gss_buf *buf); |