Changed ssl layer to use EVP_KDF API for TLS1_PRF and HKDF.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9010)

2 files changed, 42 insertions, 38 deletions

diff --git a/ssl/t1_enc.c b/ssl/t1_enc.c
index 9f2dbee..31290a4 100644
--- a/ssl/t1_enc.c
+++ b/ssl/t1_enc.c
@@ -31,7 +31,7 @@ static int tls1_PRF(SSL *s,
                     unsigned char *out, size_t olen, int fatal)
 {
     const EVP_MD *md = ssl_prf_md(s);
-    EVP_PKEY_CTX *pctx = NULL;
+    EVP_KDF_CTX *kctx = NULL;
     int ret = 0;
 
     if (md == NULL) {
@@ -43,16 +43,22 @@ static int tls1_PRF(SSL *s,
             SSLerr(SSL_F_TLS1_PRF, ERR_R_INTERNAL_ERROR);
         return 0;
     }
-    pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_TLS1_PRF, NULL);
-    if (pctx == NULL || EVP_PKEY_derive_init(pctx) <= 0
-        || EVP_PKEY_CTX_set_tls1_prf_md(pctx, md) <= 0
-        || EVP_PKEY_CTX_set1_tls1_prf_secret(pctx, sec, (int)slen) <= 0
-        || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed1, (int)seed1_len) <= 0
-        || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed2, (int)seed2_len) <= 0
-        || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed3, (int)seed3_len) <= 0
-        || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed4, (int)seed4_len) <= 0
-        || EVP_PKEY_CTX_add1_tls1_prf_seed(pctx, seed5, (int)seed5_len) <= 0
-        || EVP_PKEY_derive(pctx, out, &olen) <= 0) {
+    kctx = EVP_KDF_CTX_new_id(EVP_PKEY_TLS1_PRF);
+    if (kctx == NULL
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_MD, md) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_TLS_SECRET,
+                        sec, (size_t)slen) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_ADD_TLS_SEED,
+                        seed1, (size_t)seed1_len) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_ADD_TLS_SEED,
+                        seed2, (size_t)seed2_len) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_ADD_TLS_SEED,
+                        seed3, (size_t)seed3_len) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_ADD_TLS_SEED,
+                        seed4, (size_t)seed4_len) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_ADD_TLS_SEED,
+                        seed5, (size_t)seed5_len) <= 0
+        || EVP_KDF_derive(kctx, out, olen) <= 0) {
         if (fatal)
             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS1_PRF,
                      ERR_R_INTERNAL_ERROR);
@@ -64,7 +70,7 @@ static int tls1_PRF(SSL *s,
     ret = 1;
 
  err:
-    EVP_PKEY_CTX_free(pctx);
+    EVP_KDF_CTX_free(kctx);
     return ret;
 }
 
diff --git a/ssl/tls13_enc.c b/ssl/tls13_enc.c
index edb3290..b0fc4b2 100644
--- a/ssl/tls13_enc.c
+++ b/ssl/tls13_enc.c
@@ -31,7 +31,7 @@ int tls13_hkdf_expand(SSL *s, const EVP_MD *md, const unsigned char *secret,
                              unsigned char *out, size_t outlen, int fatal)
 {
     static const unsigned char label_prefix[] = "tls13 ";
-    EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL);
+    EVP_KDF_CTX *kctx = EVP_KDF_CTX_new_id(EVP_PKEY_HKDF);
     int ret;
     size_t hkdflabellen;
     size_t hashlen;
@@ -45,7 +45,7 @@ int tls13_hkdf_expand(SSL *s, const EVP_MD *md, const unsigned char *secret,
                             + 1 + EVP_MAX_MD_SIZE];
     WPACKET pkt;
 
-    if (pctx == NULL)
+    if (kctx == NULL)
         return 0;
 
     if (labellen > TLS13_MAX_LABEL_LEN) {
@@ -59,7 +59,7 @@ int tls13_hkdf_expand(SSL *s, const EVP_MD *md, const unsigned char *secret,
              */
             SSLerr(SSL_F_TLS13_HKDF_EXPAND, SSL_R_TLS_ILLEGAL_EXPORTER_LABEL);
         }
-        EVP_PKEY_CTX_free(pctx);
+        EVP_KDF_CTX_free(kctx);
         return 0;
     }
 
@@ -74,7 +74,7 @@ int tls13_hkdf_expand(SSL *s, const EVP_MD *md, const unsigned char *secret,
             || !WPACKET_sub_memcpy_u8(&pkt, data, (data == NULL) ? 0 : datalen)
             || !WPACKET_get_total_written(&pkt, &hkdflabellen)
             || !WPACKET_finish(&pkt)) {
-        EVP_PKEY_CTX_free(pctx);
+        EVP_KDF_CTX_free(kctx);
         WPACKET_cleanup(&pkt);
         if (fatal)
             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS13_HKDF_EXPAND,
@@ -84,15 +84,15 @@ int tls13_hkdf_expand(SSL *s, const EVP_MD *md, const unsigned char *secret,
         return 0;
     }
 
-    ret = EVP_PKEY_derive_init(pctx) <= 0
-            || EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXPAND_ONLY)
-               <= 0
-            || EVP_PKEY_CTX_set_hkdf_md(pctx, md) <= 0
-            || EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, hashlen) <= 0
-            || EVP_PKEY_CTX_add1_hkdf_info(pctx, hkdflabel, hkdflabellen) <= 0
-            || EVP_PKEY_derive(pctx, out, &outlen) <= 0;
+    ret = EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_HKDF_MODE,
+                       EVP_PKEY_HKDEF_MODE_EXPAND_ONLY) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_MD, md) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_KEY, secret, hashlen) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_ADD_HKDF_INFO,
+                        hkdflabel, hkdflabellen) <= 0
+        || EVP_KDF_derive(kctx, out, outlen) <= 0;
 
-    EVP_PKEY_CTX_free(pctx);
+    EVP_KDF_CTX_free(kctx);
 
     if (ret != 0) {
         if (fatal)
@@ -155,11 +155,11 @@ int tls13_generate_secret(SSL *s, const EVP_MD *md,
     size_t mdlen, prevsecretlen;
     int mdleni;
     int ret;
-    EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL);
+    EVP_KDF_CTX *kctx = EVP_KDF_CTX_new_id(EVP_PKEY_HKDF);
     static const char derived_secret_label[] = "derived";
     unsigned char preextractsec[EVP_MAX_MD_SIZE];
 
-    if (pctx == NULL) {
+    if (kctx == NULL) {
         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS13_GENERATE_SECRET,
                  ERR_R_INTERNAL_ERROR);
         return 0;
@@ -192,7 +192,7 @@ int tls13_generate_secret(SSL *s, const EVP_MD *md,
             SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS13_GENERATE_SECRET,
                      ERR_R_INTERNAL_ERROR);
             EVP_MD_CTX_free(mctx);
-            EVP_PKEY_CTX_free(pctx);
+            EVP_KDF_CTX_free(kctx);
             return 0;
         }
         EVP_MD_CTX_free(mctx);
@@ -203,7 +203,7 @@ int tls13_generate_secret(SSL *s, const EVP_MD *md,
                                sizeof(derived_secret_label) - 1, hash, mdlen,
                                preextractsec, mdlen, 1)) {
             /* SSLfatal() already called */
-            EVP_PKEY_CTX_free(pctx);
+            EVP_KDF_CTX_free(kctx);
             return 0;
         }
 
@@ -211,21 +211,19 @@ int tls13_generate_secret(SSL *s, const EVP_MD *md,
         prevsecretlen = mdlen;
     }
 
-    ret = EVP_PKEY_derive_init(pctx) <= 0
-            || EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY)
-               <= 0
-            || EVP_PKEY_CTX_set_hkdf_md(pctx, md) <= 0
-            || EVP_PKEY_CTX_set1_hkdf_key(pctx, insecret, insecretlen) <= 0
-            || EVP_PKEY_CTX_set1_hkdf_salt(pctx, prevsecret, prevsecretlen)
-               <= 0
-            || EVP_PKEY_derive(pctx, outsecret, &mdlen)
-               <= 0;
+    ret = EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_HKDF_MODE,
+                       EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_MD, md) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_KEY, insecret, insecretlen) <= 0
+        || EVP_KDF_ctrl(kctx, EVP_KDF_CTRL_SET_SALT,
+                        prevsecret, prevsecretlen) <= 0
+        || EVP_KDF_derive(kctx, outsecret, mdlen) <= 0;
 
     if (ret != 0)
         SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS13_GENERATE_SECRET,
                  ERR_R_INTERNAL_ERROR);
 
-    EVP_PKEY_CTX_free(pctx);
+    EVP_KDF_CTX_free(kctx);
     if (prevsecret == preextractsec)
         OPENSSL_cleanse(preextractsec, mdlen);
     return ret == 0;