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82 lines
2.4 KiB
Groff
82 lines
2.4 KiB
Groff
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.TH sshpk\-sign 1 "Jan 2016" sshpk "sshpk Commands"
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.SH NAME
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.PP
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sshpk\-sign \- sign data using an SSH key
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.SH SYNOPSYS
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.PP
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\fB\fCsshpk\-sign\fR \-i KEYPATH [OPTION...]
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.SH DESCRIPTION
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.PP
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Takes in arbitrary bytes, and signs them using an SSH private key. The key can
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be of any type or format supported by the \fB\fCsshpk\fR library, including the
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standard OpenSSH formats, as well as PEM PKCS#1 and PKCS#8.
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.PP
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The signature is printed out in Base64 encoding, unless the \fB\fC\-\-binary\fR or \fB\fC\-b\fR
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option is given.
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.SH EXAMPLES
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.PP
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Signing with default settings:
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.PP
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.RS
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.nf
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$ printf 'foo' | sshpk\-sign \-i ~/.ssh/id_ecdsa
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MEUCIAMdLS/vXrrtWFepwe...
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.fi
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.RE
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.PP
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Signing in SSH (RFC 4253) format (rather than the default ASN.1):
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.PP
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.RS
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.nf
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$ printf 'foo' | sshpk\-sign \-i ~/.ssh/id_ecdsa \-t ssh
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AAAAFGVjZHNhLXNoYTIt...
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.fi
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.RE
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.PP
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Saving the binary signature to a file:
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.PP
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.RS
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.nf
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$ printf 'foo' | sshpk\-sign \-i ~/.ssh/id_ecdsa \\
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\-o signature.bin \-b
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$ cat signature.bin | base64
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MEUCIAMdLS/vXrrtWFepwe...
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.fi
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.RE
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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 signing.
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.TP
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\fB\fC\-b, \-\-binary\fR
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Don't base64\-encode the signature before outputting it.
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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 signing. \fB\fCKEY\fR must be a relative or absolute
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filesystem path to the key file. Any format supported by the \fB\fCsshpk\fR library
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is supported, including OpenSSH formats and standard PEM PKCS.
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.TP
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\fB\fC\-f PATH, \-\-file=PATH\fR
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Input file to sign instead of stdin.
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.TP
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\fB\fC\-o PATH, \-\-out=PATH\fR
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Output file to save signature in instead of stdout.
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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-verify (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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