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69 lines
2.2 KiB
Groff
69 lines
2.2 KiB
Groff
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.TH sshpk\-verify 1 "Jan 2016" sshpk "sshpk Commands"
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.SH NAME
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.PP
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sshpk\-verify \- verify a signature on data using an SSH key
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.SH SYNOPSYS
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.PP
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\fB\fCsshpk\-verify\fR \-i KEYPATH \-s SIGNATURE [OPTION...]
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.SH DESCRIPTION
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.PP
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Takes in arbitrary bytes and a Base64\-encoded signature, and verifies that the
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signature was produced by the private half of the given SSH public key.
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.SH EXAMPLES
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.PP
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.RS
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.nf
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$ printf 'foo' | sshpk\-verify \-i ~/.ssh/id_ecdsa \-s MEUCIQCYp...
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OK
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$ printf 'foo' | sshpk\-verify \-i ~/.ssh/id_ecdsa \-s GARBAGE...
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NOT OK
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.fi
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.RE
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.SH EXIT STATUS
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.TP
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\fB\fC0\fR
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Signature validates and matches the key.
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.TP
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\fB\fC1\fR
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Signature is parseable and the correct length but does not match the key or
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otherwise is invalid.
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.TP
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\fB\fC2\fR
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The signature or key could not be parsed.
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.TP
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\fB\fC3\fR
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Invalid commandline options were supplied.
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.SH OPTIONS
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.TP
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\fB\fC\-v, \-\-verbose\fR
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Print extra information about the key and signature to stderr when verifying.
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.TP
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\fB\fC\-i KEY, \-\-identity=KEY\fR
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Select the key to be used for verification. \fB\fCKEY\fR must be a relative or
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absolute filesystem path to the key file. Any format supported by the \fB\fCsshpk\fR
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library is supported, including OpenSSH formats and standard PEM PKCS.
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.TP
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\fB\fC\-s BASE64, \-\-signature=BASE64\fR
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Supplies the base64\-encoded signature to be verified.
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.TP
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\fB\fC\-f PATH, \-\-file=PATH\fR
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Input file to verify instead of stdin.
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.TP
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\fB\fC\-H HASH, \-\-hash=HASH\fR
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Set the hash algorithm to be used for signing. This should be one of \fB\fCsha1\fR,
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\fB\fCsha256\fR or \fB\fCsha512\fR\&. Some key types may place restrictions on which hash
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algorithms may be used (e.g. ED25519 keys can only use SHA\-512).
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.TP
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\fB\fC\-t FORMAT, \-\-format=FORMAT\fR
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Choose the signature format to use, from \fB\fCasn1\fR, \fB\fCssh\fR or \fB\fCraw\fR (only for
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ED25519 signatures). The \fB\fCasn1\fR format is the default, as it is the format
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used with TLS and typically the standard in most non\-SSH libraries (e.g.
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OpenSSL). The \fB\fCssh\fR format is used in the SSH protocol and by the ssh\-agent.
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.SH SEE ALSO
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.PP
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.BR sshpk-sign (1)
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.SH BUGS
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.PP
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Report bugs at Github
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\[la]https://github.com/arekinath/node-sshpk/issues\[ra]
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