This is the command pkcs1-conv that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
pkcs1-conv - convert keys from PKCS#1 format to s-expression format
SYNOPSIS
pkcs1-conv [{--private-rsa-key|--public-rsa-key|--public-key-info} [--base-64]] < FILE
DESCRIPTION
This manual page documents briefly the pkcs1-conv command. This manual page was written
for the Debian GNU/Linux distribution because the original program does not have a manual
page.
pkcs1-conv converts private and public RSA keys from PKCS #1 format to sexp format.
OPTIONS
This program follows the usual GNU command line syntax, with long options starting with
two dashes (`-').
By default pkcs1-conv expects a PEM-encapsulated RSA key on standard input, and will
determine its type from the Pre-Encapsulation Boundary. To convert a DER-encoded (non
PEM-encoded) key, one of the first three options below must be used:
--private-rsa-key
Specify that a DER-encoded RSAPrivateKey, as defined by PKCS #1 (RFC 3447), and
described in section A.1.2 of its appendix A, is to be expected as input.
--public-rsa-key
Specify that a DER-encoded RSAPublicKey, as defined by PKCS #1 (RFC 3447), and
described in section A.1.1 of its appendix A, is to be expected as input.
--public-key-info
Specify that a DER-encoded SubjectPublicKeyInfo, as defined by PKCS #6, and
described in section A.1 of its appendix A, encapsulating an RSAPublicKey, is to be
expected as input.
--base-64
Together with --private-rsa-key, --public-rsa-key, or --public-key-info, specify
that base64 encoding is applied on top of the DER encoding.
-?, --help
Show summary of options (not implemented).
-V, --version
Show version of program.
DIAGNOSTICS
pkcs1-conv will complain and exit with a status of 1 if the input doesn't match
expectations. In PEM mode (when no option is used), if no PEM block is found, pkcs1-conv
will output nothing but exit with a zero status.
EXAMPLES
$ openssl genrsa -out privkey.pem
$ pkcs1-conv < privkey.pem > privkey.sexp
$ openssl rsa -in privkey.pem -outform DER -out privkey.der
$ openssl rsa -in privkey.pem -outform DER -pubout -out pubkey.der
$ pkcs1-conv --rsa-private-key < privkey.der > privkey.sexp
$ pkcs1-conv --public-key-info < pubkey.der > pubkey.sexp
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