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Extract the elliptic curve name from TLS connection lines #198

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Merged
merged 1 commit into from
Jul 2, 2024
Merged

Extract the elliptic curve name from TLS connection lines #198

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3 changes: 2 additions & 1 deletion postfix.grok
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@ GREEDYDATA_NO_SEMICOLON [^;]*
GREEDYDATA_NO_BRACKET [^<>]*
STATUS_WORD [\w-]*
IP_UNKNOWN unknown
CURVE_WORD [PBK]-[0-9]+

# common postfix patterns
POSTFIX_QUEUEID ([0-9A-F]{6,}|[0-9a-zA-Z]{12,}|NOQUEUE)
Expand All @@ -24,7 +25,7 @@ POSTFIX_WARNING_LEVEL (warning|fatal|info)
POSTFIX_VERIFY_CLEANUP_TYPE (full|partial)


POSTFIX_TLSCONN %{DATA:postfix_tls_trustlevel} TLS connection established (to %{POSTFIX_RELAY}|from %{POSTFIX_CLIENT}): %{DATA:postfix_tls_version} with cipher %{DATA:postfix_tls_cipher} \(%{DATA:postfix_tls_cipher_size} bits\)( key-exchange %{DATA:postfix_tls_key_exchange} server-signature %{DATA:postfix_tls_server_signature} \(%{DATA:postfix_tls_server_signature_size} bits\) server-digest %{DATA:postfix_tls_server_digest})?
POSTFIX_TLSCONN %{DATA:postfix_tls_trustlevel} TLS connection established (to %{POSTFIX_RELAY}|from %{POSTFIX_CLIENT}): %{DATA:postfix_tls_version} with cipher %{DATA:postfix_tls_cipher} \(%{DATA:postfix_tls_cipher_size} bits\)( key-exchange %{DATA:postfix_tls_key_exchange} server-signature %{DATA:postfix_tls_server_signature} \((%{INT:postfix_tls_server_signature_size} bits|%{CURVE_WORD:postfix_tls_server_signature_curve})\) server-digest %{DATA:postfix_tls_server_digest})?
POSTFIX_TLSVERIFICATION certificate verification failed for %{POSTFIX_RELAY}: %{GREEDYDATA:postfix_tls_error}

POSTFIX_DELAYS %{NUMBER:postfix_delay_before_qmgr}/%{NUMBER:postfix_delay_in_qmgr}/%{NUMBER:postfix_delay_conn_setup}/%{NUMBER:postfix_delay_transmission}
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14 changes: 14 additions & 0 deletions test/smtp_0035.yaml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,14 @@
pattern: ^%{POSTFIX_SMTP}$
data: "Untrusted TLS connection established to gmail-smtp-in.l.google.com[74.125.128.27]:25: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-256) server-digest SHA256"
results:
postfix_tls_trustlevel: Untrusted
postfix_relay_hostname: gmail-smtp-in.l.google.com
postfix_relay_ip: 74.125.128.27
postfix_relay_port: 25
postfix_tls_version: TLSv1.3
postfix_tls_cipher: TLS_AES_256_GCM_SHA384
postfix_tls_cipher_size: 256/256
postfix_tls_key_exchange: X25519
postfix_tls_server_signature: ECDSA
postfix_tls_server_signature_curve: P-256
postfix_tls_server_digest: SHA256