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Factor out get_rsa_ssh1_priv_agent from Pageant.

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The code that reads an SSH1_AGENTC_ADD_RSA_IDENTITY message and parses
an RSA private key out of it now does it by calling a BinarySource
function in sshrsa.c, instead of doing inline in the Pageant message
handler. This has no functional change, except that now I can expose
that separate function in the testcrypt API, where it provides me with
a mechanism for creating a bare RSAKey structure for purposes of
testing RSA key exchange.
This commit is contained in:
Simon Tatham
2019-12-15 20:12:36 +00:00
parent 7dd0351254
commit 873ec97302
5 changed files with 26 additions and 14 deletions
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14
pageant.c
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@ -379,19 +379,7 @@ void pageant_handle_msg(BinarySink *bs,
plog(logctx, logfn, "request: SSH1_AGENTC_ADD_RSA_IDENTITY");
key = snew(RSAKey);
memset(key, 0, sizeof(RSAKey));
get_rsa_ssh1_pub(msg, key, RSA_SSH1_MODULUS_FIRST);
get_rsa_ssh1_priv(msg, key);
/* SSH-1 names p and q the other way round, i.e. we have
* the inverse of p mod q and not of q mod p. We swap the
* names, because our internal RSA wants iqmp. */
key->iqmp = get_mp_ssh1(msg);
key->q = get_mp_ssh1(msg);
key->p = get_mp_ssh1(msg);
key = get_rsa_ssh1_priv_agent(msg);
key->comment = mkstr(get_string(msg));
if (get_err(msg)) {