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Change ssh.h crypto APIs to output to BinarySink.

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This affects all the functions that generate public and private key
and signature blobs of all kinds, plus ssh_ecdhkex_getpublic. Instead
of returning a bare block of memory and taking an extra 'int *length'
parameter, all these functions now write to a BinarySink, and it's the
caller's job to have prepared an appropriate one where they want the
output to go (usually a strbuf).

The main value of this change is that those blob-generation functions
were chock full of ad-hoc length-counting and data marshalling. You
have only to look at rsa2_{public,private}_blob, for example, to see
the kind of thing I was keen to get rid of!
This commit is contained in:
Simon Tatham
2018-05-24 10:59:39 +01:00
parent a990738aca
commit 67de463cca
12 changed files with 542 additions and 956 deletions
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10
windows/winpgen.c
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@ -1321,13 +1321,13 @@ static INT_PTR CALLBACK MainDlgProc(HWND hwnd, UINT msg,
"PuTTYgen Error", MB_OK | MB_ICONERROR);
} else {
if (state->ssh2) {
int bloblen;
unsigned char *blob;
blob = state->ssh2key.alg->public_blob
(state->ssh2key.data, &bloblen);
strbuf *blob = strbuf_new();
state->ssh2key.alg->public_blob(
state->ssh2key.data, BinarySink_UPCAST(blob));
ssh2_write_pubkey(fp, state->ssh2key.comment,
blob, bloblen,
blob->u, blob->len,
SSH_KEYTYPE_SSH2_PUBLIC_RFC4716);
strbuf_free(blob);
} else {
ssh1_write_pubkey(fp, &state->key);
}