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More work in check_signature() (non-working).

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default 2022-09-29 15:08:56 +02:00
parent 392c014c26
commit 73a02fca6f
1 changed files with 43 additions and 0 deletions
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43
http.c
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@ -108,6 +108,8 @@ int check_signature(snac *snac, char *req)
xs *keyId = NULL;
xs *headers = NULL;
xs *signature = NULL;
xs *sig_bin = NULL;
int s_size;
char *pubkey;
char *p;
@ -151,5 +153,46 @@ int check_signature(snac *snac, char *req)
return 0;
}
/* now build the string to be signed */
xs *sig_str = xs_str_new(NULL);
{
xs *l = xs_split(headers, " ");
char *v;
p = l;
while (xs_list_iter(&p, &v)) {
char *hc;
xs *ss = NULL;
if (*sig_str != '\0')
sig_str = xs_str_cat(sig_str, "\n");
if (strcmp(v, "(request-target)") == 0) {
ss = xs_fmt("%s: post %s", v, xs_dict_get(req, "path"));
}
else {
/* add the header */
if ((hc = xs_dict_get(req, v)) == NULL) {
snac_debug(snac, 1,
xs_fmt("check_signature cannot find header %s", v));
return 0;
}
ss = xs_fmt("%s: %s", v, hc);
}
sig_str = xs_str_cat(sig_str, ss);
}
}
/* convert the signature to binary */
sig_bin = xs_base64_dec(signature, &s_size);
if (xs_evp_verify(pubkey, sig_str, strlen(sig_str), sig_bin) != 1) {
snac_debug(snac, 1, xs_fmt("rsa verify error %s", keyId));
}
return 1;
}