Expand range of ctrls for AES GCM to support retrieval and setting of invocation field. Add complete support for AES GCM ciphersuites including all those in RFC5288 and RFC5289.
diff --git a/CHANGES b/CHANGES index 58be5d4..c4dc27a 100644 --- a/CHANGES +++ b/CHANGES
@@ -4,6 +4,17 @@ Changes between 1.0.1 and 1.1.0 [xx XXX xxxx] + *) Add GCM support to TLS library. Some custom code is needed to split + the IV between the fixed (from PRF) and explicit (from TLS record) + portions. This adds all GCM ciphersuites supported by RFC5288 and + RFC5289. Generalise some AES* cipherstrings to inlclude GCM and + add a special AESGCM string for GCM only. + [Steve Henson] + + *) Expand range of ctrls for AES GCM. Permit setting invocation + field on decrypt and retrieval of invocation field only on encrypt. + [Steve Henson] + *) Add HMAC ECC ciphersuites from RFC5289. Include SHA384 PRF support. As required by RFC5289 these ciphersuites cannot be used if for versions of TLS earlier than 1.2.
diff --git a/crypto/evp/c_allc.c b/crypto/evp/c_allc.c index b262ac0..395a164 100644 --- a/crypto/evp/c_allc.c +++ b/crypto/evp/c_allc.c
@@ -167,6 +167,7 @@ EVP_add_cipher(EVP_aes_128_cfb8()); EVP_add_cipher(EVP_aes_128_ofb()); EVP_add_cipher(EVP_aes_128_ctr()); + EVP_add_cipher(EVP_aes_128_gcm()); EVP_add_cipher_alias(SN_aes_128_cbc,"AES128"); EVP_add_cipher_alias(SN_aes_128_cbc,"aes128"); EVP_add_cipher(EVP_aes_192_ecb()); @@ -176,6 +177,7 @@ EVP_add_cipher(EVP_aes_192_cfb8()); EVP_add_cipher(EVP_aes_192_ofb()); EVP_add_cipher(EVP_aes_192_ctr()); + EVP_add_cipher(EVP_aes_192_gcm()); EVP_add_cipher_alias(SN_aes_192_cbc,"AES192"); EVP_add_cipher_alias(SN_aes_192_cbc,"aes192"); EVP_add_cipher(EVP_aes_256_ecb()); @@ -185,6 +187,7 @@ EVP_add_cipher(EVP_aes_256_cfb8()); EVP_add_cipher(EVP_aes_256_ofb()); EVP_add_cipher(EVP_aes_256_ctr()); + EVP_add_cipher(EVP_aes_256_gcm()); EVP_add_cipher_alias(SN_aes_256_cbc,"AES256"); EVP_add_cipher_alias(SN_aes_256_cbc,"aes256"); #endif
diff --git a/crypto/evp/e_aes.c b/crypto/evp/e_aes.c index 6e47963..3e2107c 100644 --- a/crypto/evp/e_aes.c +++ b/crypto/evp/e_aes.c
@@ -76,6 +76,7 @@ int ivlen; /* IV length */ int taglen; int iv_gen; /* It is OK to generate IVs */ + int tls_aad_len; /* TLS AAD length */ } EVP_AES_GCM_CTX; typedef struct @@ -748,6 +749,7 @@ gctx->iv = c->iv; gctx->taglen = -1; gctx->iv_gen = 0; + gctx->tls_aad_len = -1; return 1; case EVP_CTRL_GCM_SET_IVLEN: @@ -798,7 +800,8 @@ return 0; if (arg) memcpy(gctx->iv, ptr, arg); - if (RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) + if (c->encrypt && + RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) return 0; gctx->iv_gen = 1; return 1; @@ -807,7 +810,9 @@ if (gctx->iv_gen == 0 || gctx->key_set == 0) return 0; CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); - memcpy(ptr, gctx->iv, gctx->ivlen); + if (arg <= 0 || arg > gctx->ivlen) + arg = gctx->ivlen; + memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg); /* Invocation field will be at least 8 bytes in size and * so no need to check wrap around or increment more than * last 8 bytes. @@ -816,6 +821,33 @@ gctx->iv_set = 1; return 1; + case EVP_CTRL_GCM_SET_IV_INV: + if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt) + return 0; + memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); + CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); + gctx->iv_set = 1; + return 1; + + case EVP_CTRL_AEAD_TLS1_AAD: + /* Save the AAD for later use */ + if (arg != 13) + return 0; + memcpy(c->buf, ptr, arg); + gctx->tls_aad_len = arg; + { + unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1]; + /* Correct length for explicit IV */ + len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; + /* If decrypting correct for tag too */ + if (!c->encrypt) + len -= EVP_GCM_TLS_TAG_LEN; + c->buf[arg-2] = len>>8; + c->buf[arg-1] = len & 0xff; + } + /* Extra padding: tag appended to record */ + return EVP_GCM_TLS_TAG_LEN; + default: return -1; @@ -857,12 +889,79 @@ return 1; } +/* Handle TLS GCM packet format. This consists of the last portion of the IV + * followed by the payload and finally the tag. On encrypt generate IV, + * encrypt payload and write the tag. On verify retrieve IV, decrypt payload + * and verify tag. + */ + +static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) + { + EVP_AES_GCM_CTX *gctx = ctx->cipher_data; + int rv = -1; + /* Encrypt/decrypt must be performed in place */ + if (out != in) + return -1; + /* Set IV from start of buffer or generate IV and write to start + * of buffer. + */ + if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ? + EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV, + EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) + goto err; + /* Use saved AAD */ + if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len)) + goto err; + /* Fix buffer and length to point to payload */ + in += EVP_GCM_TLS_EXPLICIT_IV_LEN; + out += EVP_GCM_TLS_EXPLICIT_IV_LEN; + len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; + if (ctx->encrypt) + { + /* Encrypt payload */ + if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) + goto err; + out += len; + /* Finally write tag */ + CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN); + rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; + } + else + { + /* Decrypt */ + if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) + goto err; + /* Retrieve tag */ + CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, + EVP_GCM_TLS_TAG_LEN); + /* If tag mismatch wipe buffer */ + if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) + { + OPENSSL_cleanse(out, len); + goto err; + } + rv = len; + } + + err: + gctx->iv_set = 0; + gctx->tls_aad_len = -1; + return rv; + } + static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t len) { EVP_AES_GCM_CTX *gctx = ctx->cipher_data; /* If not set up, return error */ - if (!gctx->iv_set && !gctx->key_set) + if (!gctx->key_set) + return -1; + + if (gctx->tls_aad_len >= 0) + return aes_gcm_tls_cipher(ctx, out, in, len); + + if (!gctx->iv_set) return -1; if (!ctx->encrypt && gctx->taglen < 0) return -1; @@ -908,9 +1007,12 @@ | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT) -BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS) -BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS) -BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS) +BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM, + EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) +BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM, + EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) +BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM, + EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) {
diff --git a/crypto/evp/evp.h b/crypto/evp/evp.h index 157de07..d6cf616 100644 --- a/crypto/evp/evp.h +++ b/crypto/evp/evp.h
@@ -391,6 +391,16 @@ #define EVP_CTRL_AEAD_TLS1_AAD 0x16 /* Used by composite AEAD ciphers, no-op in GCM, CCM... */ #define EVP_CTRL_AEAD_SET_MAC_KEY 0x17 +/* Set the GCM invocation field, decrypt only */ +#define EVP_CTRL_GCM_SET_IV_INV 0x18 + +/* GCM TLS constants */ +/* Length of fixed part of IV derived from PRF */ +#define EVP_GCM_TLS_FIXED_IV_LEN 4 +/* Length of explicit part of IV part of TLS records */ +#define EVP_GCM_TLS_EXPLICIT_IV_LEN 8 +/* Length of tag for TLS */ +#define EVP_GCM_TLS_TAG_LEN 16 typedef struct evp_cipher_info_st {
diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c index 0055156..9d25e99 100644 --- a/ssl/s3_lib.c +++ b/ssl/s3_lib.c
@@ -1823,6 +1823,200 @@ #endif /* OPENSSL_NO_SEED */ + /* GCM ciphersuites from RFC5288 */ + + /* Cipher 9C */ + { + 1, + TLS1_TXT_RSA_WITH_AES_128_GCM_SHA256, + TLS1_CK_RSA_WITH_AES_128_GCM_SHA256, + SSL_kRSA, + SSL_aRSA, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher 9D */ + { + 1, + TLS1_TXT_RSA_WITH_AES_256_GCM_SHA384, + TLS1_CK_RSA_WITH_AES_256_GCM_SHA384, + SSL_kRSA, + SSL_aRSA, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + + /* Cipher 9E */ + { + 1, + TLS1_TXT_DHE_RSA_WITH_AES_128_GCM_SHA256, + TLS1_CK_DHE_RSA_WITH_AES_128_GCM_SHA256, + SSL_kEDH, + SSL_aRSA, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher 9F */ + { + 1, + TLS1_TXT_DHE_RSA_WITH_AES_256_GCM_SHA384, + TLS1_CK_DHE_RSA_WITH_AES_256_GCM_SHA384, + SSL_kEDH, + SSL_aRSA, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + + /* Cipher A0 */ + { + 0, + TLS1_TXT_DH_RSA_WITH_AES_128_GCM_SHA256, + TLS1_CK_DH_RSA_WITH_AES_128_GCM_SHA256, + SSL_kDHr, + SSL_aDH, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher A1 */ + { + 0, + TLS1_TXT_DH_RSA_WITH_AES_256_GCM_SHA384, + TLS1_CK_DH_RSA_WITH_AES_256_GCM_SHA384, + SSL_kDHr, + SSL_aDH, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + + /* Cipher A2 */ + { + 1, + TLS1_TXT_DHE_DSS_WITH_AES_128_GCM_SHA256, + TLS1_CK_DHE_DSS_WITH_AES_128_GCM_SHA256, + SSL_kEDH, + SSL_aDSS, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher A3 */ + { + 1, + TLS1_TXT_DHE_DSS_WITH_AES_256_GCM_SHA384, + TLS1_CK_DHE_DSS_WITH_AES_256_GCM_SHA384, + SSL_kEDH, + SSL_aDSS, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + + /* Cipher A4 */ + { + 0, + TLS1_TXT_DH_DSS_WITH_AES_128_GCM_SHA256, + TLS1_CK_DH_DSS_WITH_AES_128_GCM_SHA256, + SSL_kDHr, + SSL_aDH, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher A5 */ + { + 0, + TLS1_TXT_DH_DSS_WITH_AES_256_GCM_SHA384, + TLS1_CK_DH_DSS_WITH_AES_256_GCM_SHA384, + SSL_kDHr, + SSL_aDH, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + + /* Cipher A6 */ + { + 1, + TLS1_TXT_ADH_WITH_AES_128_GCM_SHA256, + TLS1_CK_ADH_WITH_AES_128_GCM_SHA256, + SSL_kEDH, + SSL_aNULL, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher A7 */ + { + 1, + TLS1_TXT_ADH_WITH_AES_256_GCM_SHA384, + TLS1_CK_ADH_WITH_AES_256_GCM_SHA384, + SSL_kEDH, + SSL_aNULL, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + #ifndef OPENSSL_NO_ECDH /* Cipher C001 */ { @@ -2502,6 +2696,136 @@ 256, }, + /* GCM based TLS v1.2 ciphersuites from RFC5289 */ + + /* Cipher C02B */ + { + 1, + TLS1_TXT_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, + SSL_kEECDH, + SSL_aECDSA, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher C02C */ + { + 1, + TLS1_TXT_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, + SSL_kEECDH, + SSL_aECDSA, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + + /* Cipher C02D */ + { + 1, + TLS1_TXT_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, + TLS1_CK_ECDH_ECDSA_WITH_AES_128_GCM_SHA256, + SSL_kECDHe, + SSL_aECDH, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher C02E */ + { + 1, + TLS1_TXT_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, + TLS1_CK_ECDH_ECDSA_WITH_AES_256_GCM_SHA384, + SSL_kECDHe, + SSL_aECDH, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + + /* Cipher C02F */ + { + 1, + TLS1_TXT_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256, + SSL_kEECDH, + SSL_aRSA, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher C030 */ + { + 1, + TLS1_TXT_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + TLS1_CK_ECDHE_RSA_WITH_AES_256_GCM_SHA384, + SSL_kEECDH, + SSL_aRSA, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + + /* Cipher C031 */ + { + 1, + TLS1_TXT_ECDH_RSA_WITH_AES_128_GCM_SHA256, + TLS1_CK_ECDH_RSA_WITH_AES_128_GCM_SHA256, + SSL_kECDHe, + SSL_aECDH, + SSL_AES128GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA256|TLS1_PRF_SHA256, + 128, + 128, + }, + + /* Cipher C032 */ + { + 1, + TLS1_TXT_ECDH_RSA_WITH_AES_256_GCM_SHA384, + TLS1_CK_ECDH_RSA_WITH_AES_256_GCM_SHA384, + SSL_kECDHe, + SSL_aECDH, + SSL_AES256GCM, + SSL_AEAD, + SSL_TLSV1_2, + SSL_NOT_EXP|SSL_HIGH|SSL_FIPS, + SSL_HANDSHAKE_MAC_SHA384|TLS1_PRF_SHA384, + 256, + 256, + }, + #endif /* OPENSSL_NO_ECDH */
diff --git a/ssl/s3_pkt.c b/ssl/s3_pkt.c index d1a18ee..eba442d 100644 --- a/ssl/s3_pkt.c +++ b/ssl/s3_pkt.c
@@ -742,12 +742,18 @@ plen=p; p+=2; /* Explicit IV length, block ciphers and TLS version 1.1 or later */ - if (s->enc_write_ctx && s->version >= TLS1_1_VERSION - && EVP_CIPHER_CTX_mode(s->enc_write_ctx) == EVP_CIPH_CBC_MODE) + if (s->enc_write_ctx && s->version >= TLS1_1_VERSION) { - eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); - if (eivlen <= 1) - eivlen = 0; + int mode = EVP_CIPHER_CTX_mode(s->enc_write_ctx); + if (mode == EVP_CIPH_CBC_MODE) + { + eivlen = EVP_CIPHER_CTX_iv_length(s->enc_write_ctx); + if (eivlen <= 1) + eivlen = 0; + } + /* Need explicit part of IV for GCM mode */ + else if (mode == EVP_CIPH_GCM_MODE) + eivlen = EVP_GCM_TLS_EXPLICIT_IV_LEN; } else eivlen = 0;
diff --git a/ssl/ssl.h b/ssl/ssl.h index 244cfb2..871327d 100644 --- a/ssl/ssl.h +++ b/ssl/ssl.h
@@ -287,6 +287,7 @@ #define SSL_TXT_AES128 "AES128" #define SSL_TXT_AES256 "AES256" #define SSL_TXT_AES "AES" +#define SSL_TXT_AES_GCM "AESGCM" #define SSL_TXT_CAMELLIA128 "CAMELLIA128" #define SSL_TXT_CAMELLIA256 "CAMELLIA256" #define SSL_TXT_CAMELLIA "CAMELLIA"
diff --git a/ssl/ssl_ciph.c b/ssl/ssl_ciph.c index 224c63d..29d8f28 100644 --- a/ssl/ssl_ciph.c +++ b/ssl/ssl_ciph.c
@@ -162,11 +162,13 @@ #define SSL_ENC_CAMELLIA256_IDX 9 #define SSL_ENC_GOST89_IDX 10 #define SSL_ENC_SEED_IDX 11 -#define SSL_ENC_NUM_IDX 12 +#define SSL_ENC_AES128GCM_IDX 12 +#define SSL_ENC_AES256GCM_IDX 13 +#define SSL_ENC_NUM_IDX 14 static const EVP_CIPHER *ssl_cipher_methods[SSL_ENC_NUM_IDX]={ - NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL, + NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL }; #define SSL_COMP_NULL_IDX 0 @@ -289,9 +291,10 @@ {0,SSL_TXT_IDEA,0, 0,0,SSL_IDEA, 0,0,0,0,0,0}, {0,SSL_TXT_SEED,0, 0,0,SSL_SEED, 0,0,0,0,0,0}, {0,SSL_TXT_eNULL,0, 0,0,SSL_eNULL, 0,0,0,0,0,0}, - {0,SSL_TXT_AES128,0, 0,0,SSL_AES128,0,0,0,0,0,0}, - {0,SSL_TXT_AES256,0, 0,0,SSL_AES256,0,0,0,0,0,0}, - {0,SSL_TXT_AES,0, 0,0,SSL_AES128|SSL_AES256,0,0,0,0,0,0}, + {0,SSL_TXT_AES128,0, 0,0,SSL_AES128|SSL_AES128GCM,0,0,0,0,0,0}, + {0,SSL_TXT_AES256,0, 0,0,SSL_AES256|SSL_AES256GCM,0,0,0,0,0,0}, + {0,SSL_TXT_AES,0, 0,0,SSL_AES,0,0,0,0,0,0}, + {0,SSL_TXT_AES_GCM,0, 0,0,SSL_AES128GCM|SSL_AES256GCM,0,0,0,0,0,0}, {0,SSL_TXT_CAMELLIA128,0,0,0,SSL_CAMELLIA128,0,0,0,0,0,0}, {0,SSL_TXT_CAMELLIA256,0,0,0,SSL_CAMELLIA256,0,0,0,0,0,0}, {0,SSL_TXT_CAMELLIA ,0,0,0,SSL_CAMELLIA128|SSL_CAMELLIA256,0,0,0,0,0,0}, @@ -387,6 +390,11 @@ ssl_cipher_methods[SSL_ENC_SEED_IDX]= EVP_get_cipherbyname(SN_seed_cbc); + ssl_cipher_methods[SSL_ENC_AES128GCM_IDX]= + EVP_get_cipherbyname(SN_aes_128_gcm); + ssl_cipher_methods[SSL_ENC_AES256GCM_IDX]= + EVP_get_cipherbyname(SN_aes_256_gcm); + ssl_digest_methods[SSL_MD_MD5_IDX]= EVP_get_digestbyname(SN_md5); ssl_mac_secret_size[SSL_MD_MD5_IDX]= @@ -541,6 +549,12 @@ case SSL_SEED: i=SSL_ENC_SEED_IDX; break; + case SSL_AES128GCM: + i=SSL_ENC_AES128GCM_IDX; + break; + case SSL_AES256GCM: + i=SSL_ENC_AES256GCM_IDX; + break; default: i= -1; break; @@ -585,14 +599,15 @@ *md=NULL; if (mac_pkey_type!=NULL) *mac_pkey_type = NID_undef; if (mac_secret_size!=NULL) *mac_secret_size = 0; - + if (c->algorithm_mac == SSL_AEAD) + mac_pkey_type = NULL; } else { *md=ssl_digest_methods[i]; if (mac_pkey_type!=NULL) *mac_pkey_type = ssl_mac_pkey_id[i]; if (mac_secret_size!=NULL) *mac_secret_size = ssl_mac_secret_size[i]; - } + } if ((*enc != NULL) && (*md != NULL || (EVP_CIPHER_flags(*enc)&EVP_CIPH_FLAG_AEAD_CIPHER)) && @@ -1635,6 +1650,12 @@ case SSL_AES256: enc="AES(256)"; break; + case SSL_AES128GCM: + enc="AESGCM(128)"; + break; + case SSL_AES256GCM: + enc="AESGCM(256)"; + break; case SSL_CAMELLIA128: enc="Camellia(128)"; break; @@ -1663,6 +1684,9 @@ case SSL_SHA384: mac="SHA384"; break; + case SSL_AEAD: + mac="AEAD"; + break; default: mac="unknown"; break;
diff --git a/ssl/ssl_locl.h b/ssl/ssl_locl.h index 726be35..458f570 100644 --- a/ssl/ssl_locl.h +++ b/ssl/ssl_locl.h
@@ -317,18 +317,23 @@ #define SSL_CAMELLIA256 0x00000200L #define SSL_eGOST2814789CNT 0x00000400L #define SSL_SEED 0x00000800L +#define SSL_AES128GCM 0x00001000L +#define SSL_AES256GCM 0x00002000L -#define SSL_AES (SSL_AES128|SSL_AES256) +#define SSL_AES (SSL_AES128|SSL_AES256|SSL_AES128GCM|SSL_AES256GCM) #define SSL_CAMELLIA (SSL_CAMELLIA128|SSL_CAMELLIA256) /* Bits for algorithm_mac (symmetric authentication) */ + #define SSL_MD5 0x00000001L #define SSL_SHA1 0x00000002L #define SSL_GOST94 0x00000004L #define SSL_GOST89MAC 0x00000008L #define SSL_SHA256 0x00000010L #define SSL_SHA384 0x00000020L +/* Not a real MAC, just an indication it is part of cipher */ +#define SSL_AEAD 0x00000040L /* Bits for algorithm_ssl (protocol version) */ #define SSL_SSLV2 0x00000001L
diff --git a/ssl/t1_enc.c b/ssl/t1_enc.c index 1c14637..3452b25 100644 --- a/ssl/t1_enc.c +++ b/ssl/t1_enc.c
@@ -456,7 +456,11 @@ j=is_export ? (cl < SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher) ? cl : SSL_C_EXPORT_KEYLENGTH(s->s3->tmp.new_cipher)) : cl; /* Was j=(exp)?5:EVP_CIPHER_key_length(c); */ - k=EVP_CIPHER_iv_length(c); + /* If GCM mode only part of IV comes from PRF */ + if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) + k = EVP_GCM_TLS_FIXED_IV_LEN; + else + k=EVP_CIPHER_iv_length(c); if ( (which == SSL3_CHANGE_CIPHER_CLIENT_WRITE) || (which == SSL3_CHANGE_CIPHER_SERVER_READ)) { @@ -539,7 +543,13 @@ } #endif /* KSSL_DEBUG */ - EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); + if (EVP_CIPHER_mode(c) == EVP_CIPH_GCM_MODE) + { + EVP_CipherInit_ex(dd,c,NULL,key,NULL,(which & SSL3_CC_WRITE)); + EVP_CIPHER_CTX_ctrl(dd, EVP_CTRL_GCM_SET_IV_FIXED, k, iv); + } + else + EVP_CipherInit_ex(dd,c,NULL,key,iv,(which & SSL3_CC_WRITE)); /* Needed for "composite" AEADs, such as RC4-HMAC-MD5 */ if ((EVP_CIPHER_flags(c)&EVP_CIPH_FLAG_AEAD_CIPHER) && *mac_secret_size) @@ -815,8 +825,14 @@ } } - if (!EVP_Cipher(ds,rec->data,rec->input,l)) + if (EVP_Cipher(ds,rec->data,rec->input,l) < 0) return -1; /* AEAD can fail to verify MAC */ + if (EVP_CIPHER_mode(enc) == EVP_CIPH_GCM_MODE && !send) + { + rec->data += EVP_GCM_TLS_EXPLICIT_IV_LEN; + rec->input += EVP_GCM_TLS_EXPLICIT_IV_LEN; + rec->length -= EVP_GCM_TLS_EXPLICIT_IV_LEN; + } #ifdef KSSL_DEBUG {
diff --git a/ssl/tls1.h b/ssl/tls1.h index 152bcc6..8fe7d7c 100644 --- a/ssl/tls1.h +++ b/ssl/tls1.h
@@ -399,6 +399,20 @@ #define TLS1_CK_DHE_RSA_WITH_SEED_SHA 0x0300009A #define TLS1_CK_ADH_WITH_SEED_SHA 0x0300009B +/* TLS v1.2 GCM ciphersuites from RFC5288 */ +#define TLS1_CK_RSA_WITH_AES_128_GCM_SHA256 0x0300009C +#define TLS1_CK_RSA_WITH_AES_256_GCM_SHA384 0x0300009D +#define TLS1_CK_DHE_RSA_WITH_AES_128_GCM_SHA256 0x0300009E +#define TLS1_CK_DHE_RSA_WITH_AES_256_GCM_SHA384 0x0300009F +#define TLS1_CK_DH_RSA_WITH_AES_128_GCM_SHA256 0x030000A0 +#define TLS1_CK_DH_RSA_WITH_AES_256_GCM_SHA384 0x030000A1 +#define TLS1_CK_DHE_DSS_WITH_AES_128_GCM_SHA256 0x030000A2 +#define TLS1_CK_DHE_DSS_WITH_AES_256_GCM_SHA384 0x030000A3 +#define TLS1_CK_DH_DSS_WITH_AES_128_GCM_SHA256 0x030000A4 +#define TLS1_CK_DH_DSS_WITH_AES_256_GCM_SHA384 0x030000A5 +#define TLS1_CK_ADH_WITH_AES_128_GCM_SHA256 0x030000A6 +#define TLS1_CK_ADH_WITH_AES_256_GCM_SHA384 0x030000A7 + /* ECC ciphersuites from draft-ietf-tls-ecc-12.txt with changes soon to be in draft 13 */ #define TLS1_CK_ECDH_ECDSA_WITH_NULL_SHA 0x0300C001 #define TLS1_CK_ECDH_ECDSA_WITH_RC4_128_SHA 0x0300C002 @@ -452,6 +466,16 @@ #define TLS1_CK_ECDH_RSA_WITH_AES_128_SHA256 0x0300C029 #define TLS1_CK_ECDH_RSA_WITH_AES_256_SHA384 0x0300C02A +/* ECDH GCM based ciphersuites from RFC5289 */ +#define TLS1_CK_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 0x0300C02B +#define TLS1_CK_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 0x0300C02C +#define TLS1_CK_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 0x0300C02D +#define TLS1_CK_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 0x0300C02E +#define TLS1_CK_ECDHE_RSA_WITH_AES_128_GCM_SHA256 0x0300C02F +#define TLS1_CK_ECDHE_RSA_WITH_AES_256_GCM_SHA384 0x0300C030 +#define TLS1_CK_ECDH_RSA_WITH_AES_128_GCM_SHA256 0x0300C031 +#define TLS1_CK_ECDH_RSA_WITH_AES_256_GCM_SHA384 0x0300C032 + /* XXX * Inconsistency alert: * The OpenSSL names of ciphers with ephemeral DH here include the string @@ -568,6 +592,20 @@ #define TLS1_TXT_ADH_WITH_AES_128_SHA256 "ADH-AES128-SHA256" #define TLS1_TXT_ADH_WITH_AES_256_SHA256 "ADH-AES256-SHA256" +/* TLS v1.2 GCM ciphersuites from RFC5288 */ +#define TLS1_TXT_RSA_WITH_AES_128_GCM_SHA256 "AES128-GCM-SHA256" +#define TLS1_TXT_RSA_WITH_AES_256_GCM_SHA384 "AES256-GCM-SHA384" +#define TLS1_TXT_DHE_RSA_WITH_AES_128_GCM_SHA256 "DHE-RSA-AES128-GCM-SHA256" +#define TLS1_TXT_DHE_RSA_WITH_AES_256_GCM_SHA384 "DHE-RSA-AES256-GCM-SHA384" +#define TLS1_TXT_DH_RSA_WITH_AES_128_GCM_SHA256 "DH-RSA-AES128-GCM-SHA256" +#define TLS1_TXT_DH_RSA_WITH_AES_256_GCM_SHA384 "DH-RSA-AES256-GCM-SHA384" +#define TLS1_TXT_DHE_DSS_WITH_AES_128_GCM_SHA256 "DHE-DSS-AES128-GCM-SHA256" +#define TLS1_TXT_DHE_DSS_WITH_AES_256_GCM_SHA384 "DHE-DSS-AES256-GCM-SHA384" +#define TLS1_TXT_DH_DSS_WITH_AES_128_GCM_SHA256 "DH-DSS-AES128-GCM-SHA256" +#define TLS1_TXT_DH_DSS_WITH_AES_256_GCM_SHA384 "DH-DSS-AES256-GCM-SHA384" +#define TLS1_TXT_ADH_WITH_AES_128_GCM_SHA256 "ADH-AES128-GCM-SHA256" +#define TLS1_TXT_ADH_WITH_AES_256_GCM_SHA384 "ADH-AES256-GCM-SHA384" + /* ECDH HMAC based ciphersuites from RFC5289 */ #define TLS1_TXT_ECDHE_ECDSA_WITH_AES_128_SHA256 "ECDHE-ECDSA-AES128-SHA256" @@ -579,6 +617,16 @@ #define TLS1_TXT_ECDH_RSA_WITH_AES_128_SHA256 "ECDH-RSA-AES128-SHA256" #define TLS1_TXT_ECDH_RSA_WITH_AES_256_SHA384 "ECDH-RSA-AES256-SHA384" +/* ECDH GCM based ciphersuites from RFC5289 */ +#define TLS1_TXT_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 "ECDHE-ECDSA-AES128-GCM-SHA256" +#define TLS1_TXT_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 "ECDHE-ECDSA-AES256-GCM-SHA384" +#define TLS1_TXT_ECDH_ECDSA_WITH_AES_128_GCM_SHA256 "ECDH-ECDSA-AES128-GCM-SHA256" +#define TLS1_TXT_ECDH_ECDSA_WITH_AES_256_GCM_SHA384 "ECDH-ECDSA-AES256-GCM-SHA384" +#define TLS1_TXT_ECDHE_RSA_WITH_AES_128_GCM_SHA256 "ECDHE-RSA-AES128-GCM-SHA256" +#define TLS1_TXT_ECDHE_RSA_WITH_AES_256_GCM_SHA384 "ECDHE-RSA-AES256-GCM-SHA384" +#define TLS1_TXT_ECDH_RSA_WITH_AES_128_GCM_SHA256 "ECDH-RSA-AES128-GCM-SHA256" +#define TLS1_TXT_ECDH_RSA_WITH_AES_256_GCM_SHA384 "ECDH-RSA-AES256-GCM-SHA384" + #define TLS_CT_RSA_SIGN 1 #define TLS_CT_DSS_SIGN 2 #define TLS_CT_RSA_FIXED_DH 3