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c2f1a563a5
This makes a second independent copy of an existing ssh_key, for situations where one piece of code is going to want to keep it after its current owner frees it. In order to have it work on an arbitrary ssh_key, whether public-only or a full public+private key pair, I've had to add an ssh_key query method to ask whether a private key is known. I'm surprised I haven't found a need for that before! But I suppose in most situations in an SSH client you statically know which kind of key you're dealing with.
33 lines
869 B
C
33 lines
869 B
C
/*
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* Make a copy of an existing ssh_key object, e.g. to survive after
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* the original is freed.
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*/
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#include "misc.h"
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#include "ssh.h"
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ssh_key *ssh_key_clone(ssh_key *key)
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{
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/*
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* To avoid having to add a special method in the vtable API, we
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* clone by round-tripping through public and private blobs.
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*/
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strbuf *pub = strbuf_new_nm();
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ssh_key_public_blob(key, BinarySink_UPCAST(pub));
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ssh_key *copy;
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if (ssh_key_has_private(key)) {
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strbuf *priv = strbuf_new_nm();
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ssh_key_private_blob(key, BinarySink_UPCAST(priv));
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copy = ssh_key_new_priv(ssh_key_alg(key), ptrlen_from_strbuf(pub),
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ptrlen_from_strbuf(priv));
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strbuf_free(priv);
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} else {
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copy = ssh_key_new_pub(ssh_key_alg(key), ptrlen_from_strbuf(pub));
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}
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strbuf_free(pub);
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return copy;
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}
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