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Adjust DES_cbc_cksum() so the returned value is the same as MIT's

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mit_des_cbc_cksum().  The difference was first observed, then verified by
looking at the MIT source.
This commit is contained in:
Richard Levitte 2003-02-12 17:20:39 +00:00
parent cf56663fb7
commit 9ec1d35f29
2 changed files with 15 additions and 0 deletions
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6
CHANGES
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@ -420,6 +420,12 @@ TODO: bug: pad x with leading zeros if necessary
Changes between 0.9.7 and 0.9.7a [XX xxx 2003] Changes between 0.9.7 and 0.9.7a [XX xxx 2003]
*) Adjust DES_cbc_cksum() so it returns the same value as the MIT
Kerberos function mit_des_cbc_cksum(). Before this change,
the value returned by DES_cbc_cksum() was like the one from
mit_des_cbc_cksum(), except the bytes were swapped.
[Kevin Greaney <Kevin.Greaney@hp.com> and Richard Levitte]
*) Allow an application to disable the automatic SSL chain building. *) Allow an application to disable the automatic SSL chain building.
Before this a rather primitive chain build was always performed in Before this a rather primitive chain build was always performed in
ssl3_output_cert_chain(): an application had no way to send the ssl3_output_cert_chain(): an application had no way to send the

9
crypto/des/cbc_cksm.c
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@ -93,5 +93,14 @@ DES_LONG DES_cbc_cksum(const unsigned char *in, DES_cblock *output,
l2c(tout1,out); l2c(tout1,out);
} }
tout0=tin0=tin1=tin[0]=tin[1]=0; tout0=tin0=tin1=tin[0]=tin[1]=0;
/*
Transform the data in tout1 so that it will
match the return value that the MIT Kerberos
mit_des_cbc_cksum API returns.
*/
tout1 = ((tout1 >> 24L) & 0x000000FF)
| ((tout1 >> 8L) & 0x0000FF00)
| ((tout1 << 8L) & 0x00FF0000)
| ((tout1 << 24L) & 0xFF000000);
return(tout1); return(tout1);
} }