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diff -up openssh-8.7p1/pam_ssh_agent_auth-pam_ssh_agent_auth-0.10.4/userauth_pubkey_from_id.c.rsasha2 openssh-8.7p1/pam_ssh_agent_auth-pam_ssh_agent_auth-0.10.4/userauth_pubkey_from_id.c
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--- openssh-8.7p1/pam_ssh_agent_auth-pam_ssh_agent_auth-0.10.4/userauth_pubkey_from_id.c.rsasha2 2022-07-15 15:08:12.865585410 +0200
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+++ openssh-8.7p1/pam_ssh_agent_auth-pam_ssh_agent_auth-0.10.4/userauth_pubkey_from_id.c 2022-07-15 15:16:25.164282372 +0200
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@@ -87,8 +87,13 @@ userauth_pubkey_from_id(const char *ruse
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(r = sshbuf_put_string(b, pkblob, blen)) != 0)
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fatal("%s: buffer error: %s", __func__, ssh_err(r));
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- if (ssh_agent_sign(id->ac->fd, id->key, &sig, &slen, sshbuf_ptr(b), sshbuf_len(b), NULL, 0) != 0)
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- goto user_auth_clean_exit;
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+ if (sshkey_type_plain(id->key->type) == KEY_RSA
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+ && ssh_agent_sign(id->ac->fd, id->key, &sig, &slen, sshbuf_ptr(b), sshbuf_len(b), "rsa-sha2-256", 0) == 0) {
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+ /* Do nothing */
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+ } else {
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+ if (ssh_agent_sign(id->ac->fd, id->key, &sig, &slen, sshbuf_ptr(b), sshbuf_len(b), NULL, 0) != 0)
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+ goto user_auth_clean_exit;
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+ }
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/* test for correct signature */
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if (sshkey_verify(id->key, sig, slen, sshbuf_ptr(b), sshbuf_len(b), NULL, 0, NULL) == 0)
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