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Make SSL handshakes much faster

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This change boosts SSL handshake performance from 2,627 to ~10,000 per
second which is the same level of performance as NGINX at establishing
secure connections. That's impressive if we consider that redbean is a
forking frontend application server. This was accomplished by:

  1. Enabling either SSL session caching or SSL tickets. We choose to
     use tickets since they reduce network round trips too and that's
     a more important metric than wrk'ing localhost.

  2. Fixing mbedtls_mpi_sub_abs() which is the most frequently called
     function. It's called about 12,000 times during an SSL handshake
     since it's the basis of most arithmetic operations like addition
     and for some strange reason it was designed to make two needless
     copies in addition to calling malloc and free. That's now fixed.

  3. Improving TLS output buffering during the SSL handshake only, so
     that only a single is write and read system call is needed until
     blocking on the ping pong.

redbean will now do a better job wiping sensitive memory from a child
process as soon as it's not needed. The nice thing about fork is it's
much faster than reverse proxying so the goal is to use the different
address spaces along with setuid() to minimize the risk that a server
key will be compromised in the event that application code is hacked.
This commit is contained in:
Justine Tunney 2021-07-11 23:17:47 -07:00
parent 8c4cce043c
commit f3e28aa192
103 changed files with 1310 additions and 1085 deletions
Download patch file Download diff file Expand all files Collapse all files

54
third_party/mbedtls/ssl_internal.h vendored
View file

@ -788,10 +788,6 @@ struct mbedtls_ssl_flight_item
/* Find an entry in a signature-hash set matching a given hash algorithm. */
mbedtls_md_type_t mbedtls_ssl_sig_hash_set_find( mbedtls_ssl_sig_hash_set_t *set,
mbedtls_pk_type_t sig_alg );
/* Add a signature-hash-pair to a signature-hash set */
void mbedtls_ssl_sig_hash_set_add( mbedtls_ssl_sig_hash_set_t *set,
mbedtls_pk_type_t sig_alg,
mbedtls_md_type_t md_alg );
/* Allow exactly one hash algorithm for each signature. */
void mbedtls_ssl_sig_hash_set_const_hash( mbedtls_ssl_sig_hash_set_t *set,
mbedtls_md_type_t md_alg );
@ -958,10 +954,8 @@ static inline int mbedtls_ssl_get_psk( const mbedtls_ssl_context *ssl,
#if defined(MBEDTLS_PK_C)
unsigned char mbedtls_ssl_sig_from_pk( mbedtls_pk_context * );
unsigned char mbedtls_ssl_sig_from_pk_alg( mbedtls_pk_type_t );
mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char );
#endif
mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash );
unsigned char mbedtls_ssl_hash_from_md_alg( int md );
int mbedtls_ssl_set_calc_verify_md( mbedtls_ssl_context *ssl, int md );
@ -1174,4 +1168,52 @@ void mbedtls_ssl_buffering_free( mbedtls_ssl_context *ssl );
void mbedtls_ssl_flight_free( mbedtls_ssl_flight_item *flight );
#endif /* MBEDTLS_SSL_PROTO_DTLS */
/*
* Convert from MBEDTLS_SSL_HASH_XXX to MBEDTLS_MD_XXX
*/
forceinline mbedtls_md_type_t mbedtls_ssl_md_alg_from_hash( unsigned char hash )
{
switch( hash )
{
#if defined(MBEDTLS_MD5_C)
case MBEDTLS_SSL_HASH_MD5:
return( MBEDTLS_MD_MD5 );
#endif
#if defined(MBEDTLS_SHA1_C)
case MBEDTLS_SSL_HASH_SHA1:
return( MBEDTLS_MD_SHA1 );
#endif
#if defined(MBEDTLS_SHA256_C)
case MBEDTLS_SSL_HASH_SHA224:
return( MBEDTLS_MD_SHA224 );
case MBEDTLS_SSL_HASH_SHA256:
return( MBEDTLS_MD_SHA256 );
#endif
#if defined(MBEDTLS_SHA512_C)
case MBEDTLS_SSL_HASH_SHA384:
return( MBEDTLS_MD_SHA384 );
case MBEDTLS_SSL_HASH_SHA512:
return( MBEDTLS_MD_SHA512 );
#endif
default:
return( MBEDTLS_MD_NONE );
}
}
forceinline mbedtls_pk_type_t mbedtls_ssl_pk_alg_from_sig( unsigned char sig )
{
switch( sig ) {
#if defined(MBEDTLS_RSA_C)
case MBEDTLS_SSL_SIG_RSA:
return( MBEDTLS_PK_RSA );
#endif
#if defined(MBEDTLS_ECDSA_C)
case MBEDTLS_SSL_SIG_ECDSA:
return( MBEDTLS_PK_ECDSA );
#endif
default:
return( MBEDTLS_PK_NONE );
}
}
#endif /* ssl_internal.h */