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Diffstat (limited to 'usr/man/man1/rsautl.1')
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diff --git a/usr/man/man1/rsautl.1 b/usr/man/man1/rsautl.1 new file mode 100755 index 000000000..bb8346b54 --- /dev/null +++ b/usr/man/man1/rsautl.1 @@ -0,0 +1,316 @@ +.\" Automatically generated by Pod::Man 2.28 (Pod::Simple 3.28) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +rsautl \- RSA utility +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +\&\fBopenssl\fR \fBrsautl\fR +[\fB\-in file\fR] +[\fB\-out file\fR] +[\fB\-inkey file\fR] +[\fB\-pubin\fR] +[\fB\-certin\fR] +[\fB\-sign\fR] +[\fB\-verify\fR] +[\fB\-encrypt\fR] +[\fB\-decrypt\fR] +[\fB\-pkcs\fR] +[\fB\-ssl\fR] +[\fB\-raw\fR] +[\fB\-hexdump\fR] +[\fB\-asn1parse\fR] +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +The \fBrsautl\fR command can be used to sign, verify, encrypt and decrypt +data using the \s-1RSA\s0 algorithm. +.SH "COMMAND OPTIONS" +.IX Header "COMMAND OPTIONS" +.IP "\fB\-in filename\fR" 4 +.IX Item "-in filename" +This specifies the input filename to read data from or standard input +if this option is not specified. +.IP "\fB\-out filename\fR" 4 +.IX Item "-out filename" +specifies the output filename to write to or standard output by +default. +.IP "\fB\-inkey file\fR" 4 +.IX Item "-inkey file" +the input key file, by default it should be an \s-1RSA\s0 private key. +.IP "\fB\-pubin\fR" 4 +.IX Item "-pubin" +the input file is an \s-1RSA\s0 public key. +.IP "\fB\-certin\fR" 4 +.IX Item "-certin" +the input is a certificate containing an \s-1RSA\s0 public key. +.IP "\fB\-sign\fR" 4 +.IX Item "-sign" +sign the input data and output the signed result. This requires +and \s-1RSA\s0 private key. +.IP "\fB\-verify\fR" 4 +.IX Item "-verify" +verify the input data and output the recovered data. +.IP "\fB\-encrypt\fR" 4 +.IX Item "-encrypt" +encrypt the input data using an \s-1RSA\s0 public key. +.IP "\fB\-decrypt\fR" 4 +.IX Item "-decrypt" +decrypt the input data using an \s-1RSA\s0 private key. +.IP "\fB\-pkcs, \-oaep, \-ssl, \-raw\fR" 4 +.IX Item "-pkcs, -oaep, -ssl, -raw" +the padding to use: PKCS#1 v1.5 (the default), PKCS#1 \s-1OAEP,\s0 +special padding used in \s-1SSL\s0 v2 backwards compatible handshakes, +or no padding, respectively. +For signatures, only \fB\-pkcs\fR and \fB\-raw\fR can be used. +.IP "\fB\-hexdump\fR" 4 +.IX Item "-hexdump" +hex dump the output data. +.IP "\fB\-asn1parse\fR" 4 +.IX Item "-asn1parse" +asn1parse the output data, this is useful when combined with the +\&\fB\-verify\fR option. +.SH "NOTES" +.IX Header "NOTES" +\&\fBrsautl\fR because it uses the \s-1RSA\s0 algorithm directly can only be +used to sign or verify small pieces of data. +.SH "EXAMPLES" +.IX Header "EXAMPLES" +Sign some data using a private key: +.PP +.Vb 1 +\& openssl rsautl \-sign \-in file \-inkey key.pem \-out sig +.Ve +.PP +Recover the signed data +.PP +.Vb 1 +\& openssl rsautl \-verify \-in sig \-inkey key.pem +.Ve +.PP +Examine the raw signed data: +.PP +.Vb 1 +\& openssl rsautl \-verify \-in file \-inkey key.pem \-raw \-hexdump +\& +\& 0000 \- 00 01 ff ff ff ff ff ff\-ff ff ff ff ff ff ff ff ................ +\& 0010 \- ff ff ff ff ff ff ff ff\-ff ff ff ff ff ff ff ff ................ +\& 0020 \- ff ff ff ff ff ff ff ff\-ff ff ff ff ff ff ff ff ................ +\& 0030 \- ff ff ff ff ff ff ff ff\-ff ff ff ff ff ff ff ff ................ +\& 0040 \- ff ff ff ff ff ff ff ff\-ff ff ff ff ff ff ff ff ................ +\& 0050 \- ff ff ff ff ff ff ff ff\-ff ff ff ff ff ff ff ff ................ +\& 0060 \- ff ff ff ff ff ff ff ff\-ff ff ff ff ff ff ff ff ................ +\& 0070 \- ff ff ff ff 00 68 65 6c\-6c 6f 20 77 6f 72 6c 64 .....hello world +.Ve +.PP +The PKCS#1 block formatting is evident from this. If this was done using +encrypt and decrypt the block would have been of type 2 (the second byte) +and random padding data visible instead of the 0xff bytes. +.PP +It is possible to analyse the signature of certificates using this +utility in conjunction with \fBasn1parse\fR. Consider the self signed +example in certs/pca\-cert.pem . Running \fBasn1parse\fR as follows yields: +.PP +.Vb 1 +\& openssl asn1parse \-in pca\-cert.pem +\& +\& 0:d=0 hl=4 l= 742 cons: SEQUENCE +\& 4:d=1 hl=4 l= 591 cons: SEQUENCE +\& 8:d=2 hl=2 l= 3 cons: cont [ 0 ] +\& 10:d=3 hl=2 l= 1 prim: INTEGER :02 +\& 13:d=2 hl=2 l= 1 prim: INTEGER :00 +\& 16:d=2 hl=2 l= 13 cons: SEQUENCE +\& 18:d=3 hl=2 l= 9 prim: OBJECT :md5WithRSAEncryption +\& 29:d=3 hl=2 l= 0 prim: NULL +\& 31:d=2 hl=2 l= 92 cons: SEQUENCE +\& 33:d=3 hl=2 l= 11 cons: SET +\& 35:d=4 hl=2 l= 9 cons: SEQUENCE +\& 37:d=5 hl=2 l= 3 prim: OBJECT :countryName +\& 42:d=5 hl=2 l= 2 prim: PRINTABLESTRING :AU +\& .... +\& 599:d=1 hl=2 l= 13 cons: SEQUENCE +\& 601:d=2 hl=2 l= 9 prim: OBJECT :md5WithRSAEncryption +\& 612:d=2 hl=2 l= 0 prim: NULL +\& 614:d=1 hl=3 l= 129 prim: BIT STRING +.Ve +.PP +The final \s-1BIT STRING\s0 contains the actual signature. It can be extracted with: +.PP +.Vb 1 +\& openssl asn1parse \-in pca\-cert.pem \-out sig \-noout \-strparse 614 +.Ve +.PP +The certificate public key can be extracted with: +.PP +.Vb 1 +\& openssl x509 \-in test/testx509.pem \-pubkey \-noout >pubkey.pem +.Ve +.PP +The signature can be analysed with: +.PP +.Vb 1 +\& openssl rsautl \-in sig \-verify \-asn1parse \-inkey pubkey.pem \-pubin +\& +\& 0:d=0 hl=2 l= 32 cons: SEQUENCE +\& 2:d=1 hl=2 l= 12 cons: SEQUENCE +\& 4:d=2 hl=2 l= 8 prim: OBJECT :md5 +\& 14:d=2 hl=2 l= 0 prim: NULL +\& 16:d=1 hl=2 l= 16 prim: OCTET STRING +\& 0000 \- f3 46 9e aa 1a 4a 73 c9\-37 ea 93 00 48 25 08 b5 .F...Js.7...H%.. +.Ve +.PP +This is the parsed version of an \s-1ASN1\s0 DigestInfo structure. It can be seen that +the digest used was md5. The actual part of the certificate that was signed can +be extracted with: +.PP +.Vb 1 +\& openssl asn1parse \-in pca\-cert.pem \-out tbs \-noout \-strparse 4 +.Ve +.PP +and its digest computed with: +.PP +.Vb 2 +\& openssl md5 \-c tbs +\& MD5(tbs)= f3:46:9e:aa:1a:4a:73:c9:37:ea:93:00:48:25:08:b5 +.Ve +.PP +which it can be seen agrees with the recovered value above. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fIdgst\fR\|(1), \fIrsa\fR\|(1), \fIgenrsa\fR\|(1) |