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auth/rsa2asn1: implement private key export with -a flag (thanks kvik)

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kvik writes:

I needed to convert the RSA private key that was laying around in
secstore into a format understood by UNIX® tools like SSH.

With asn12rsa(8) we can go from the ASN.1/DER to Plan 9 format, but not
back - so I wrote the libsec function asn1encodeRSApriv(2) and used it in
rsa2asn1(8) by adding the -a flag which causes the full private key to be
encoded and output.
This commit is contained in:
cinap_lenrek 2019-08-30 07:34:35 +02:00
parent 7bb1a9a185
commit 85216d3d95
5 changed files with 60 additions and 4 deletions
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1
sys/include/libsec.h
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@ -372,6 +372,7 @@ void X509dump(uchar *cert, int ncert);
mpint* pkcs1padbuf(uchar *buf, int len, mpint *modulus, int blocktype);
int pkcs1unpadbuf(uchar *buf, int len, mpint *modulus, int blocktype);
int asn1encodeRSApub(RSApub *pk, uchar *buf, int len);
int asn1encodeRSApriv(RSApriv *k, uchar *buf, int len);
int asn1encodedigest(DigestState* (*fun)(uchar*, ulong, uchar*, DigestState*),
uchar *digest, uchar *buf, int len);