#include <ctype.h>
#include <assert.h>
#include "putty.h"
+#include "misc.h"
/*
* Parse a string block size specification. This is approximately a
* we want to return 1, so then we can just shift down. */
return (0x100 - val) >> 8;
}
+
+int match_ssh_id(int stringlen, const void *string, const char *id)
+{
+ int idlen = strlen(id);
+ return (idlen == stringlen && !memcmp(string, id, idlen));
+}
+
+void *get_ssh_string(int *datalen, const void **data, int *stringlen)
+{
+ void *ret;
+ int len;
+
+ if (*datalen < 4)
+ return NULL;
+ len = GET_32BIT_MSB_FIRST((const unsigned char *)*data);
+ if (*datalen < len+4)
+ return NULL;
+ ret = (void *)((const char *)*data + 4);
+ *datalen -= len + 4;
+ *data = (const char *)*data + len + 4;
+ *stringlen = len;
+ return ret;
+}
+
+int get_ssh_uint32(int *datalen, const void **data, unsigned *ret)
+{
+ if (*datalen < 4)
+ return FALSE;
+ *ret = GET_32BIT_MSB_FIRST((const unsigned char *)*data);
+ *datalen -= 4;
+ *data = (const char *)*data + 4;
+ return TRUE;
+}
* by the 'eq' in the name. */
int smemeq(const void *av, const void *bv, size_t len);
+/* Extracts an SSH-marshalled string from the start of *data. If
+ * successful (*datalen is not too small), advances data/datalen past
+ * the string and returns a pointer to the string itself and its
+ * length in *stringlen. Otherwise does nothing and returns NULL.
+ *
+ * Like strchr, this function can discard const from its parameter.
+ * Treat it as if it was a family of two functions, one returning a
+ * non-const string given a non-const pointer, and one taking and
+ * returning const. */
+void *get_ssh_string(int *datalen, const void **data, int *stringlen);
+/* Extracts an SSH uint32, similarly. Returns TRUE on success, and
+ * leaves the extracted value in *ret. */
+int get_ssh_uint32(int *datalen, const void **data, unsigned *ret);
+/* Given a not-necessarily-zero-terminated string in (length,data)
+ * form, check if it equals an ordinary C zero-terminated string. */
+int match_ssh_id(int stringlen, const void *string, const char *id);
+
/*
* Debugging functions.
*