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| 1 | +// Copyright 2021 The Gitea Authors. All rights reserved. |
| 2 | +// Use of this source code is governed by a MIT-style |
| 3 | +// license that can be found in the LICENSE file. |
| 4 | + |
| 5 | +package cmd |
| 6 | + |
| 7 | +import ( |
| 8 | + "crypto/tls" |
| 9 | + "net/http" |
| 10 | + "os" |
| 11 | + "strings" |
| 12 | + |
| 13 | + "code.gitea.io/gitea/modules/graceful" |
| 14 | + "code.gitea.io/gitea/modules/log" |
| 15 | + "code.gitea.io/gitea/modules/setting" |
| 16 | + "github.com/klauspost/cpuid/v2" |
| 17 | +) |
| 18 | + |
| 19 | +var tlsVersionStringMap = map[string]uint16{ |
| 20 | + "": tls.VersionTLS12, // Default to tls.VersionTLS12 |
| 21 | + "tlsv1.0": tls.VersionTLS10, |
| 22 | + "tlsv1.1": tls.VersionTLS11, |
| 23 | + "tlsv1.2": tls.VersionTLS12, |
| 24 | + "tlsv1.3": tls.VersionTLS13, |
| 25 | +} |
| 26 | + |
| 27 | +func toTLSVersion(version string) uint16 { |
| 28 | + tlsVersion, ok := tlsVersionStringMap[strings.TrimSpace(strings.ToLower(version))] |
| 29 | + if !ok { |
| 30 | + log.Warn("Unknown tls version: %s", version) |
| 31 | + return 0 |
| 32 | + } |
| 33 | + return tlsVersion |
| 34 | +} |
| 35 | + |
| 36 | +var curveStringMap = map[string]tls.CurveID{ |
| 37 | + "x25519": tls.X25519, |
| 38 | + "p256": tls.CurveP256, |
| 39 | + "p384": tls.CurveP384, |
| 40 | + "p521": tls.CurveP521, |
| 41 | +} |
| 42 | + |
| 43 | +func toCurvePreferences(preferences []string) []tls.CurveID { |
| 44 | + ids := make([]tls.CurveID, 0, len(preferences)) |
| 45 | + for _, pref := range preferences { |
| 46 | + id, ok := curveStringMap[strings.TrimSpace(strings.ToLower(pref))] |
| 47 | + if !ok { |
| 48 | + log.Warn("Unknown curve: %s", pref) |
| 49 | + } |
| 50 | + if id != 0 { |
| 51 | + ids = append(ids, id) |
| 52 | + } |
| 53 | + } |
| 54 | + return ids |
| 55 | +} |
| 56 | + |
| 57 | +var cipherStringMap = map[string]uint16{ |
| 58 | + "rsa_with_rc4_128_sha": tls.TLS_RSA_WITH_RC4_128_SHA, |
| 59 | + "rsa_with_3des_ede_cbc_sha": tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA, |
| 60 | + "rsa_with_aes_128_cbc_sha": tls.TLS_RSA_WITH_AES_128_CBC_SHA, |
| 61 | + "rsa_with_aes_256_cbc_sha": tls.TLS_RSA_WITH_AES_256_CBC_SHA, |
| 62 | + "rsa_with_aes_128_cbc_sha256": tls.TLS_RSA_WITH_AES_128_CBC_SHA256, |
| 63 | + "rsa_with_aes_128_gcm_sha256": tls.TLS_RSA_WITH_AES_128_GCM_SHA256, |
| 64 | + "rsa_with_aes_256_gcm_sha384": tls.TLS_RSA_WITH_AES_256_GCM_SHA384, |
| 65 | + "ecdhe_ecdsa_with_rc4_128_sha": tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, |
| 66 | + "ecdhe_ecdsa_with_aes_128_cbc_sha": tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA, |
| 67 | + "ecdhe_ecdsa_with_aes_256_cbc_sha": tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA, |
| 68 | + "ecdhe_rsa_with_rc4_128_sha": tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA, |
| 69 | + "ecdhe_rsa_with_3des_ede_cbc_sha": tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA, |
| 70 | + "ecdhe_rsa_with_aes_128_cbc_sha": tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA, |
| 71 | + "ecdhe_rsa_with_aes_256_cbc_sha": tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, |
| 72 | + "ecdhe_ecdsa_with_aes_128_cbc_sha256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256, |
| 73 | + "ecdhe_rsa_with_aes_128_cbc_sha256": tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, |
| 74 | + "ecdhe_rsa_with_aes_128_gcm_sha256": tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
| 75 | + "ecdhe_ecdsa_with_aes_128_gcm_sha256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, |
| 76 | + "ecdhe_rsa_with_aes_256_gcm_sha384": tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, |
| 77 | + "ecdhe_ecdsa_with_aes_256_gcm_sha384": tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, |
| 78 | + "ecdhe_rsa_with_chacha20_poly1305_sha256": tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, |
| 79 | + "ecdhe_ecdsa_with_chacha20_poly1305_sha256": tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, |
| 80 | + "ecdhe_rsa_with_chacha20_poly1305": tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, |
| 81 | + "ecdhe_ecdsa_with_chacha20_poly1305": tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, |
| 82 | + "aes_128_gcm_sha256": tls.TLS_AES_128_GCM_SHA256, |
| 83 | + "aes_256_gcm_sha384": tls.TLS_AES_256_GCM_SHA384, |
| 84 | + "chacha20_poly1305_sha256": tls.TLS_CHACHA20_POLY1305_SHA256, |
| 85 | +} |
| 86 | + |
| 87 | +func toTLSCiphers(cipherStrings []string) []uint16 { |
| 88 | + ciphers := make([]uint16, 0, len(cipherStrings)) |
| 89 | + for _, cipherString := range cipherStrings { |
| 90 | + cipher, ok := cipherStringMap[strings.TrimSpace(strings.ToLower(cipherString))] |
| 91 | + if !ok { |
| 92 | + log.Warn("Unknown cipher: %s", cipherString) |
| 93 | + } |
| 94 | + if cipher != 0 { |
| 95 | + ciphers = append(ciphers, cipher) |
| 96 | + } |
| 97 | + } |
| 98 | + |
| 99 | + return ciphers |
| 100 | +} |
| 101 | + |
| 102 | +// defaultCiphers uses hardware support to check if AES is specifically |
| 103 | +// supported by the CPU. |
| 104 | +// |
| 105 | +// If AES is supported AES ciphers will be preferred over ChaCha based ciphers |
| 106 | +// (This code is directly inspired by the certmagic code.) |
| 107 | +func defaultCiphers() []uint16 { |
| 108 | + if cpuid.CPU.Supports(cpuid.AESNI) { |
| 109 | + return defaultCiphersAESfirst |
| 110 | + } |
| 111 | + return defaultCiphersChaChaFirst |
| 112 | +} |
| 113 | + |
| 114 | +var ( |
| 115 | + defaultCiphersAES = []uint16{ |
| 116 | + tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, |
| 117 | + tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, |
| 118 | + tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, |
| 119 | + tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
| 120 | + } |
| 121 | + |
| 122 | + defaultCiphersChaCha = []uint16{ |
| 123 | + tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305, |
| 124 | + tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305, |
| 125 | + } |
| 126 | + |
| 127 | + defaultCiphersAESfirst = append(defaultCiphersAES, defaultCiphersChaCha...) |
| 128 | + defaultCiphersChaChaFirst = append(defaultCiphersChaCha, defaultCiphersAES...) |
| 129 | +) |
| 130 | + |
| 131 | +// runHTTPs listens on the provided network address and then calls |
| 132 | +// Serve to handle requests on incoming TLS connections. |
| 133 | +// |
| 134 | +// Filenames containing a certificate and matching private key for the server must |
| 135 | +// be provided. If the certificate is signed by a certificate authority, the |
| 136 | +// certFile should be the concatenation of the server's certificate followed by the |
| 137 | +// CA's certificate. |
| 138 | +func runHTTPS(network, listenAddr, name, certFile, keyFile string, m http.Handler) error { |
| 139 | + tlsConfig := &tls.Config{} |
| 140 | + if tlsConfig.NextProtos == nil { |
| 141 | + tlsConfig.NextProtos = []string{"h2", "http/1.1"} |
| 142 | + } |
| 143 | + |
| 144 | + if version := toTLSVersion(setting.SSLMinimumVersion); version != 0 { |
| 145 | + tlsConfig.MinVersion = version |
| 146 | + } |
| 147 | + if version := toTLSVersion(setting.SSLMaximumVersion); version != 0 { |
| 148 | + tlsConfig.MaxVersion = version |
| 149 | + } |
| 150 | + |
| 151 | + // Set curve preferences |
| 152 | + tlsConfig.CurvePreferences = []tls.CurveID{ |
| 153 | + tls.X25519, |
| 154 | + tls.CurveP256, |
| 155 | + } |
| 156 | + if curves := toCurvePreferences(setting.SSLCurvePreferences); len(curves) > 0 { |
| 157 | + tlsConfig.CurvePreferences = curves |
| 158 | + } |
| 159 | + |
| 160 | + // Set cipher suites |
| 161 | + tlsConfig.CipherSuites = defaultCiphers() |
| 162 | + if ciphers := toTLSCiphers(setting.SSLCipherSuites); len(ciphers) > 0 { |
| 163 | + tlsConfig.CipherSuites = ciphers |
| 164 | + } |
| 165 | + |
| 166 | + tlsConfig.Certificates = make([]tls.Certificate, 1) |
| 167 | + |
| 168 | + certPEMBlock, err := os.ReadFile(certFile) |
| 169 | + if err != nil { |
| 170 | + log.Error("Failed to load https cert file %s for %s:%s: %v", certFile, network, listenAddr, err) |
| 171 | + return err |
| 172 | + } |
| 173 | + |
| 174 | + keyPEMBlock, err := os.ReadFile(keyFile) |
| 175 | + if err != nil { |
| 176 | + log.Error("Failed to load https key file %s for %s:%s: %v", keyFile, network, listenAddr, err) |
| 177 | + return err |
| 178 | + } |
| 179 | + |
| 180 | + tlsConfig.Certificates[0], err = tls.X509KeyPair(certPEMBlock, keyPEMBlock) |
| 181 | + if err != nil { |
| 182 | + log.Error("Failed to create certificate from cert file %s and key file %s for %s:%s: %v", certFile, keyFile, network, listenAddr, err) |
| 183 | + return err |
| 184 | + } |
| 185 | + |
| 186 | + return graceful.HTTPListenAndServeTLSConfig(network, listenAddr, name, tlsConfig, m) |
| 187 | +} |
| 188 | + |
| 189 | +func runHTTPSWithTLSConfig(network, listenAddr, name string, tlsConfig *tls.Config, m http.Handler) error { |
| 190 | + return graceful.HTTPListenAndServeTLSConfig(network, listenAddr, name, tlsConfig, m) |
| 191 | +} |
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