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Extra helper functions for adding key_components.

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In this commit, I provide further functions which generate the
existing set of data types:

 - key_components_add_text_pl() adds a text component, but takes a
   ptrlen rather than a const char *, in case that was what you
   happened to have already.

 - key_components_add_uint() ends up adding an mp_int to the
   structure, but takes it as input in the form of an ordinary C
   integer, for the convenience of call sites which will want to do
   that a lot and don't enjoy repeating the mp_int construction
   boilerplate

 - key_components_add_copy() takes a pointer to one of the
   key_component sub-structs in an existing key_components, and copies
   it into the output key_components under a new name, handling
   whatever type it turns out to have.
This commit is contained in:
Simon Tatham 2022-04-18 10:08:10 +01:00
parent 62bc6c5448
commit 180d1b78de
2 changed files with 35 additions and 0 deletions
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6
ssh.h
View File

@ -560,10 +560,16 @@ typedef struct key_components {
key_components *key_components_new(void);
void key_components_add_text(key_components *kc,
const char *name, const char *value);
void key_components_add_text_pl(key_components *kc,
const char *name, ptrlen value);
void key_components_add_binary(key_components *kc,
const char *name, ptrlen value);
void key_components_add_mp(key_components *kc,
const char *name, mp_int *value);
void key_components_add_uint(key_components *kc,
const char *name, uintmax_t value);
void key_components_add_copy(key_components *kc,
const char *name, const key_component *value);
void key_components_free(key_components *kc);
/*

29
utils/key_components.c
View File

@ -26,6 +26,12 @@ void key_components_add_text(key_components *kc,
key_components_add_str(kc, name, KCT_TEXT, ptrlen_from_asciz(value));
}
void key_components_add_text_pl(key_components *kc,
const char *name, ptrlen value)
{
key_components_add_str(kc, name, KCT_TEXT, value);
}
void key_components_add_binary(key_components *kc,
const char *name, ptrlen value)
{
@ -42,6 +48,29 @@ void key_components_add_mp(key_components *kc,
kc->components[n].mp = mp_copy(value);
}
void key_components_add_uint(key_components *kc,
const char *name, uintmax_t value)
{
mp_int *mpvalue = mp_from_integer(value);
key_components_add_mp(kc, name, mpvalue);
mp_free(mpvalue);
}
void key_components_add_copy(key_components *kc,
const char *name, const key_component *value)
{
switch (value->type) {
case KCT_TEXT:
case KCT_BINARY:
key_components_add_str(kc, name, value->type,
ptrlen_from_strbuf(value->str));
break;
case KCT_MPINT:
key_components_add_mp(kc, name, value->mp);
break;
}
}
void key_components_free(key_components *kc)
{
for (size_t i = 0; i < kc->ncomponents; i++) {