add required headers for smtpd.h and remove unnecessary ones in other files.

ok jung@

Remove unused variables found by clang. Additional unused var spotted by eric@.

OK mvs@, eric@

When system calls indicate an error they return -1, not some arbitrary
value < 0. errno is only updated in this case. Change all (most?)
callers of syscalls to follow this better, and let's see if this strictness
helps us in the future.

switch from having automatic EVP_CIPHER_CTX variables to allocating them
with EVP_CIPHER_CTX_new() and releasing them with EVP_CIPHER_CTX_free().

ok sunil@ and millert@

switch from EVP_{En,De}cryptInit & EVP_{En,De}cryptFinal to their _ex
counterparts, as suggested by bcook

ok bcook@, sunil@, eric@

remove spaces after '!'

no binary change

ok millert

bcopy -> memmove
bzero -> memset

fix bogus warning due to limited range on 32bit archs.

unused variable

Add crypto.c to provide smtpd with a way to encrypt envelopes and messages
using aes-256-gcm before they hit the queue. not "plugged" yet.

lots of comments from mikeb, tedu and djm.

Remove unused variables found by clang. Additional unused var spotted by eric@.

OK mvs@, eric@

When system calls indicate an error they return -1, not some arbitrary
value < 0. errno is only updated in this case. Change all (most?)
callers of syscalls to follow this better, and let's see if this strictness
helps us in the future.

switch from having automatic EVP_CIPHER_CTX variables to allocating them
with EVP_CIPHER_CTX_new() and releasing them with EVP_CIPHER_CTX_free().

ok sunil@ and millert@

switch from EVP_{En,De}cryptInit & EVP_{En,De}cryptFinal to their _ex
counterparts, as suggested by bcook

ok bcook@, sunil@, eric@

remove spaces after '!'

no binary change

ok millert

bcopy -> memmove
bzero -> memset

fix bogus warning due to limited range on 32bit archs.

unused variable

Add crypto.c to provide smtpd with a way to encrypt envelopes and messages
using aes-256-gcm before they hit the queue. not "plugged" yet.

lots of comments from mikeb, tedu and djm.

When system calls indicate an error they return -1, not some arbitrary
value < 0. errno is only updated in this case. Change all (most?)
callers of syscalls to follow this better, and let's see if this strictness
helps us in the future.

switch from having automatic EVP_CIPHER_CTX variables to allocating them
with EVP_CIPHER_CTX_new() and releasing them with EVP_CIPHER_CTX_free().

ok sunil@ and millert@

switch from EVP_{En,De}cryptInit & EVP_{En,De}cryptFinal to their _ex
counterparts, as suggested by bcook

ok bcook@, sunil@, eric@

remove spaces after '!'

no binary change

ok millert

bcopy -> memmove
bzero -> memset

fix bogus warning due to limited range on 32bit archs.

unused variable

Add crypto.c to provide smtpd with a way to encrypt envelopes and messages
using aes-256-gcm before they hit the queue. not "plugged" yet.

lots of comments from mikeb, tedu and djm.

switch from having automatic EVP_CIPHER_CTX variables to allocating them
with EVP_CIPHER_CTX_new() and releasing them with EVP_CIPHER_CTX_free().

ok sunil@ and millert@

switch from EVP_{En,De}cryptInit & EVP_{En,De}cryptFinal to their _ex
counterparts, as suggested by bcook

ok bcook@, sunil@, eric@

remove spaces after '!'

no binary change

ok millert

bcopy -> memmove
bzero -> memset

fix bogus warning due to limited range on 32bit archs.

unused variable

Add crypto.c to provide smtpd with a way to encrypt envelopes and messages
using aes-256-gcm before they hit the queue. not "plugged" yet.

lots of comments from mikeb, tedu and djm.

switch from EVP_{En,De}cryptInit & EVP_{En,De}cryptFinal to their _ex
counterparts, as suggested by bcook

ok bcook@, sunil@, eric@

remove spaces after '!'

no binary change

ok millert

bcopy -> memmove
bzero -> memset

fix bogus warning due to limited range on 32bit archs.

unused variable

Add crypto.c to provide smtpd with a way to encrypt envelopes and messages
using aes-256-gcm before they hit the queue. not "plugged" yet.

lots of comments from mikeb, tedu and djm.