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bc4e619e76
This PR contains a series of patches that date back many years and I believe were discussed on the mailing list, but never merged. We have been using these in our local copy of libssh2 without issue since 2015, if not earlier. I believe this is the full set of changes, as we tried to use comments to mark where our copy of libssh2 differs from the canonical version. This also contains changes I made earlier this year, but which were not discussed on the mailing list, to support certificates and FIDO2 keys with agent forwarding. Note that this is not a complete implementation of agent forwarding, as that is outside the scope of libssh2. Clients still need to provide their own implementation that parses ssh-agent methods after calling libssh2_channel_read() and calls the appropriate callback messages in libssh2. See the man page changes in this PR for more details. Integration-patches-by: Viktor Szakats * prefer size_t * prefer unsigned int over u_int in public function * add const * docs, indent, checksrc, debug call, compiler warning fixes
53 lines
1.7 KiB
Groff
53 lines
1.7 KiB
Groff
.TH libssh2_agent_sign 3 "1 Oct 2022" "libssh2 1.11.0" "libssh2 manual"
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.SH NAME
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libssh2_agent_sign - sign data, with the help of ssh-agent
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.SH SYNOPSIS
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.nf
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#include <libssh2.h>
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int
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libssh2_agent_sign(LIBSSH2_AGENT *agent,
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struct libssh2_agent_publickey *identity,
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unsigned char **sig,
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size_t *s_len,
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const unsigned char *data,
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size_t d_len,
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const char *method,
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unsigned int method_len);
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.fi
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.SH DESCRIPTION
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\fIagent\fP - ssh-agent handle as returned by
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.BR libssh2_agent_init(3)
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\fIidentity\fP - Public key to authenticate with, as returned by
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.BR libssh2_agent_get_identity(3)
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\fIsig\fP - A pointer to a buffer in which to place the signature. The caller
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is responsible for freeing the signature with LIBSSH2_FREE.
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\fIs_len\fP - A pointer to the length of the sig parameter.
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\fIdata\fP - The data to sign.
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\fId_len\fP - The length of the data parameter.
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\fImethod\fP - A buffer indicating the signing method. This should match the
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string at the start of identity->blob.
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\fImethod_len\fP - The length of the method parameter.
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Sign data using an ssh-agent. This function can be used in a callback
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registered with libssh2_session_callback_set(3) using
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LIBSSH2_CALLBACK_AUTHAGENT_SIGN to sign an authentication challenge from a
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server. However, the client is responsible for implementing the code that calls
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this callback in response to a SSH2_AGENTC_SIGN_REQUEST message.
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.SH RETURN VALUE
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Returns 0 if succeeded, or a negative value for error.
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.SH AVAILABILITY
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Added in libssh2 1.11.0
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.SH SEE ALSO
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.BR libssh2_agent_init(3)
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.BR libssh2_agent_get_identity(3)
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.BR libssh2_agent_userauth(3)
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.BR libssh2_session_callback_set(3)
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