am d947d006: am b8494591: Revert "Revert "external/boringssl: sync with upstream.""

* commit 'd947d006e7a7ebcfdfe642e686250caf2028c2c1':
  Revert "Revert "external/boringssl: sync with upstream.""

1 files changed, 101 insertions, 369 deletions

diff --git a/src/ssl/ssl_rsa.c b/src/ssl/ssl_rsa.c
index 87f4c1c..ccd3858 100644
--- a/src/ssl/ssl_rsa.c
+++ b/src/ssl/ssl_rsa.c
@@ -54,79 +54,38 @@
  * copied and put under another distribution licence
  * [including the GNU Public Licence.] */
 
-#include <stdio.h>
+#include <openssl/ssl.h>
 
-#include <openssl/bio.h>
 #include <openssl/err.h>
 #include <openssl/evp.h>
 #include <openssl/mem.h>
-#include <openssl/obj.h>
-#include <openssl/pem.h>
 #include <openssl/x509.h>
 
 #include "internal.h"
 
+
 static int ssl_set_cert(CERT *c, X509 *x509);
 static int ssl_set_pkey(CERT *c, EVP_PKEY *pkey);
 
+static int is_key_type_supported(int key_type) {
+  return key_type == EVP_PKEY_RSA || key_type == EVP_PKEY_EC;
+}
+
 int SSL_use_certificate(SSL *ssl, X509 *x) {
   if (x == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_certificate, ERR_R_PASSED_NULL_PARAMETER);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_PASSED_NULL_PARAMETER);
     return 0;
   }
   return ssl_set_cert(ssl->cert, x);
 }
 
-int SSL_use_certificate_file(SSL *ssl, const char *file, int type) {
-  int reason_code;
-  BIO *in;
-  int ret = 0;
-  X509 *x = NULL;
-
-  in = BIO_new(BIO_s_file());
-  if (in == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_certificate_file, ERR_R_BUF_LIB);
-    goto end;
-  }
-
-  if (BIO_read_filename(in, file) <= 0) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_certificate_file, ERR_R_SYS_LIB);
-    goto end;
-  }
-
-  if (type == SSL_FILETYPE_ASN1) {
-    reason_code = ERR_R_ASN1_LIB;
-    x = d2i_X509_bio(in, NULL);
-  } else if (type == SSL_FILETYPE_PEM) {
-    reason_code = ERR_R_PEM_LIB;
-    x = PEM_read_bio_X509(in, NULL, ssl->ctx->default_passwd_callback,
-                          ssl->ctx->default_passwd_callback_userdata);
-  } else {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_certificate_file, SSL_R_BAD_SSL_FILETYPE);
-    goto end;
-  }
-
-  if (x == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_certificate_file, reason_code);
-    goto end;
-  }
-
-  ret = SSL_use_certificate(ssl, x);
-
-end:
-  X509_free(x);
-  BIO_free(in);
-
-  return ret;
-}
-
 int SSL_use_certificate_ASN1(SSL *ssl, const uint8_t *d, int len) {
   X509 *x;
   int ret;
 
   x = d2i_X509(NULL, &d, (long)len);
   if (x == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_certificate_ASN1, ERR_R_ASN1_LIB);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_ASN1_LIB);
     return 0;
   }
 
@@ -140,13 +99,13 @@ int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa) {
   int ret;
 
   if (rsa == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_RSAPrivateKey, ERR_R_PASSED_NULL_PARAMETER);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_PASSED_NULL_PARAMETER);
     return 0;
   }
 
   pkey = EVP_PKEY_new();
   if (pkey == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_RSAPrivateKey, ERR_R_EVP_LIB);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_EVP_LIB);
     return 0;
   }
 
@@ -160,86 +119,36 @@ int SSL_use_RSAPrivateKey(SSL *ssl, RSA *rsa) {
 }
 
 static int ssl_set_pkey(CERT *c, EVP_PKEY *pkey) {
-  int i;
-
-  i = ssl_cert_type(pkey);
-  if (i < 0) {
-    OPENSSL_PUT_ERROR(SSL, ssl_set_pkey, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
+  if (!is_key_type_supported(pkey->type)) {
+    OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
     return 0;
   }
 
-  if (c->pkeys[i].x509 != NULL) {
+  if (c->x509 != NULL) {
     /* Sanity-check that the private key and the certificate match, unless the
      * key is opaque (in case of, say, a smartcard). */
     if (!EVP_PKEY_is_opaque(pkey) &&
-        !X509_check_private_key(c->pkeys[i].x509, pkey)) {
-      X509_free(c->pkeys[i].x509);
-      c->pkeys[i].x509 = NULL;
+        !X509_check_private_key(c->x509, pkey)) {
+      X509_free(c->x509);
+      c->x509 = NULL;
       return 0;
     }
   }
 
-  EVP_PKEY_free(c->pkeys[i].privatekey);
-  c->pkeys[i].privatekey = EVP_PKEY_up_ref(pkey);
-  c->key = &(c->pkeys[i]);
+  EVP_PKEY_free(c->privatekey);
+  c->privatekey = EVP_PKEY_up_ref(pkey);
 
   return 1;
 }
 
-int SSL_use_RSAPrivateKey_file(SSL *ssl, const char *file, int type) {
-  int reason_code, ret = 0;
-  BIO *in;
-  RSA *rsa = NULL;
-
-  in = BIO_new(BIO_s_file());
-  if (in == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_RSAPrivateKey_file, ERR_R_BUF_LIB);
-    goto end;
-  }
-
-  if (BIO_read_filename(in, file) <= 0) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_RSAPrivateKey_file, ERR_R_SYS_LIB);
-    goto end;
-  }
-
-  if (type == SSL_FILETYPE_ASN1) {
-    reason_code = ERR_R_ASN1_LIB;
-    rsa = d2i_RSAPrivateKey_bio(in, NULL);
-  } else if (type == SSL_FILETYPE_PEM) {
-    reason_code = ERR_R_PEM_LIB;
-    rsa =
-        PEM_read_bio_RSAPrivateKey(in, NULL, ssl->ctx->default_passwd_callback,
-                                   ssl->ctx->default_passwd_callback_userdata);
-  } else {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_RSAPrivateKey_file, SSL_R_BAD_SSL_FILETYPE);
-    goto end;
-  }
-
-  if (rsa == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_RSAPrivateKey_file, reason_code);
-    goto end;
-  }
-  ret = SSL_use_RSAPrivateKey(ssl, rsa);
-  RSA_free(rsa);
-
-end:
-  BIO_free(in);
-  return ret;
-}
-
-int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, uint8_t *d, long len) {
-  int ret;
-  const uint8_t *p;
-  RSA *rsa;
-
-  p = d;
-  rsa = d2i_RSAPrivateKey(NULL, &p, (long)len);
+int SSL_use_RSAPrivateKey_ASN1(SSL *ssl, const uint8_t *der, size_t der_len) {
+  RSA *rsa = RSA_private_key_from_bytes(der, der_len);
   if (rsa == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_RSAPrivateKey_ASN1, ERR_R_ASN1_LIB);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_ASN1_LIB);
     return 0;
   }
 
-  ret = SSL_use_RSAPrivateKey(ssl, rsa);
+  int ret = SSL_use_RSAPrivateKey(ssl, rsa);
   RSA_free(rsa);
   return ret;
 }
@@ -248,7 +157,7 @@ int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey) {
   int ret;
 
   if (pkey == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_PrivateKey, ERR_R_PASSED_NULL_PARAMETER);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_PASSED_NULL_PARAMETER);
     return 0;
   }
 
@@ -256,46 +165,6 @@ int SSL_use_PrivateKey(SSL *ssl, EVP_PKEY *pkey) {
   return ret;
 }
 
-int SSL_use_PrivateKey_file(SSL *ssl, const char *file, int type) {
-  int reason_code, ret = 0;
-  BIO *in;
-  EVP_PKEY *pkey = NULL;
-
-  in = BIO_new(BIO_s_file());
-  if (in == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_PrivateKey_file, ERR_R_BUF_LIB);
-    goto end;
-  }
-
-  if (BIO_read_filename(in, file) <= 0) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_PrivateKey_file, ERR_R_SYS_LIB);
-    goto end;
-  }
-
-  if (type == SSL_FILETYPE_PEM) {
-    reason_code = ERR_R_PEM_LIB;
-    pkey = PEM_read_bio_PrivateKey(in, NULL, ssl->ctx->default_passwd_callback,
-                                   ssl->ctx->default_passwd_callback_userdata);
-  } else if (type == SSL_FILETYPE_ASN1) {
-    reason_code = ERR_R_ASN1_LIB;
-    pkey = d2i_PrivateKey_bio(in, NULL);
-  } else {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_PrivateKey_file, SSL_R_BAD_SSL_FILETYPE);
-    goto end;
-  }
-
-  if (pkey == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_PrivateKey_file, reason_code);
-    goto end;
-  }
-  ret = SSL_use_PrivateKey(ssl, pkey);
-  EVP_PKEY_free(pkey);
-
-end:
-  BIO_free(in);
-  return ret;
-}
-
 int SSL_use_PrivateKey_ASN1(int type, SSL *ssl, const uint8_t *d, long len) {
   int ret;
   const uint8_t *p;
@@ -304,7 +173,7 @@ int SSL_use_PrivateKey_ASN1(int type, SSL *ssl, const uint8_t *d, long len) {
   p = d;
   pkey = d2i_PrivateKey(type, NULL, &p, (long)len);
   if (pkey == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_use_PrivateKey_ASN1, ERR_R_ASN1_LIB);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_ASN1_LIB);
     return 0;
   }
 
@@ -315,8 +184,7 @@ int SSL_use_PrivateKey_ASN1(int type, SSL *ssl, const uint8_t *d, long len) {
 
 int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x) {
   if (x == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_certificate,
-                      ERR_R_PASSED_NULL_PARAMETER);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_PASSED_NULL_PARAMETER);
     return 0;
   }
 
@@ -324,32 +192,28 @@ int SSL_CTX_use_certificate(SSL_CTX *ctx, X509 *x) {
 }
 
 static int ssl_set_cert(CERT *c, X509 *x) {
-  EVP_PKEY *pkey;
-  int i;
-
-  pkey = X509_get_pubkey(x);
+  EVP_PKEY *pkey = X509_get_pubkey(x);
   if (pkey == NULL) {
-    OPENSSL_PUT_ERROR(SSL, ssl_set_cert, SSL_R_X509_LIB);
+    OPENSSL_PUT_ERROR(SSL, SSL_R_X509_LIB);
     return 0;
   }
 
-  i = ssl_cert_type(pkey);
-  if (i < 0) {
-    OPENSSL_PUT_ERROR(SSL, ssl_set_cert, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
+  if (!is_key_type_supported(pkey->type)) {
+    OPENSSL_PUT_ERROR(SSL, SSL_R_UNKNOWN_CERTIFICATE_TYPE);
     EVP_PKEY_free(pkey);
     return 0;
   }
 
-  if (c->pkeys[i].privatekey != NULL) {
+  if (c->privatekey != NULL) {
     /* Sanity-check that the private key and the certificate match, unless the
      * key is opaque (in case of, say, a smartcard). */
-    if (!EVP_PKEY_is_opaque(c->pkeys[i].privatekey) &&
-        !X509_check_private_key(x, c->pkeys[i].privatekey)) {
+    if (!EVP_PKEY_is_opaque(c->privatekey) &&
+        !X509_check_private_key(x, c->privatekey)) {
       /* don't fail for a cert/key mismatch, just free current private key
        * (when switching to a different cert & key, first this function should
        * be used, then ssl_set_pkey */
-      EVP_PKEY_free(c->pkeys[i].privatekey);
-      c->pkeys[i].privatekey = NULL;
+      EVP_PKEY_free(c->privatekey);
+      c->privatekey = NULL;
       /* clear error queue */
       ERR_clear_error();
     }
@@ -357,63 +221,19 @@ static int ssl_set_cert(CERT *c, X509 *x) {
 
   EVP_PKEY_free(pkey);
 
-  X509_free(c->pkeys[i].x509);
-  c->pkeys[i].x509 = X509_up_ref(x);
-  c->key = &(c->pkeys[i]);
+  X509_free(c->x509);
+  c->x509 = X509_up_ref(x);
 
   return 1;
 }
 
-int SSL_CTX_use_certificate_file(SSL_CTX *ctx, const char *file, int type) {
-  int reason_code;
-  BIO *in;
-  int ret = 0;
-  X509 *x = NULL;
-
-  in = BIO_new(BIO_s_file());
-  if (in == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_certificate_file, ERR_R_BUF_LIB);
-    goto end;
-  }
-
-  if (BIO_read_filename(in, file) <= 0) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_certificate_file, ERR_R_SYS_LIB);
-    goto end;
-  }
-
-  if (type == SSL_FILETYPE_ASN1) {
-    reason_code = ERR_R_ASN1_LIB;
-    x = d2i_X509_bio(in, NULL);
-  } else if (type == SSL_FILETYPE_PEM) {
-    reason_code = ERR_R_PEM_LIB;
-    x = PEM_read_bio_X509(in, NULL, ctx->default_passwd_callback,
-                          ctx->default_passwd_callback_userdata);
-  } else {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_certificate_file,
-                      SSL_R_BAD_SSL_FILETYPE);
-    goto end;
-  }
-
-  if (x == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_certificate_file, reason_code);
-    goto end;
-  }
-
-  ret = SSL_CTX_use_certificate(ctx, x);
-
-end:
-  X509_free(x);
-  BIO_free(in);
-  return ret;
-}
-
 int SSL_CTX_use_certificate_ASN1(SSL_CTX *ctx, int len, const uint8_t *d) {
   X509 *x;
   int ret;
 
   x = d2i_X509(NULL, &d, (long)len);
   if (x == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_certificate_ASN1, ERR_R_ASN1_LIB);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_ASN1_LIB);
     return 0;
   }
 
@@ -427,14 +247,13 @@ int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa) {
   EVP_PKEY *pkey;
 
   if (rsa == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_RSAPrivateKey,
-                      ERR_R_PASSED_NULL_PARAMETER);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_PASSED_NULL_PARAMETER);
     return 0;
   }
 
   pkey = EVP_PKEY_new();
   if (pkey == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_RSAPrivateKey, ERR_R_EVP_LIB);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_EVP_LIB);
     return 0;
   }
 
@@ -446,113 +265,28 @@ int SSL_CTX_use_RSAPrivateKey(SSL_CTX *ctx, RSA *rsa) {
   return ret;
 }
 
-int SSL_CTX_use_RSAPrivateKey_file(SSL_CTX *ctx, const char *file, int type) {
-  int reason_code, ret = 0;
-  BIO *in;
-  RSA *rsa = NULL;
-
-  in = BIO_new(BIO_s_file());
-  if (in == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_RSAPrivateKey_file, ERR_R_BUF_LIB);
-    goto end;
-  }
-
-  if (BIO_read_filename(in, file) <= 0) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_RSAPrivateKey_file, ERR_R_SYS_LIB);
-    goto end;
-  }
-
-  if (type == SSL_FILETYPE_ASN1) {
-    reason_code = ERR_R_ASN1_LIB;
-    rsa = d2i_RSAPrivateKey_bio(in, NULL);
-  } else if (type == SSL_FILETYPE_PEM) {
-    reason_code = ERR_R_PEM_LIB;
-    rsa = PEM_read_bio_RSAPrivateKey(in, NULL, ctx->default_passwd_callback,
-                                     ctx->default_passwd_callback_userdata);
-  } else {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_RSAPrivateKey_file,
-                      SSL_R_BAD_SSL_FILETYPE);
-    goto end;
-  }
-
-  if (rsa == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_RSAPrivateKey_file, reason_code);
-    goto end;
-  }
-  ret = SSL_CTX_use_RSAPrivateKey(ctx, rsa);
-  RSA_free(rsa);
-
-end:
-  BIO_free(in);
-  return ret;
-}
-
-int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, const uint8_t *d, long len) {
-  int ret;
-  const uint8_t *p;
-  RSA *rsa;
-
-  p = d;
-  rsa = d2i_RSAPrivateKey(NULL, &p, (long)len);
+int SSL_CTX_use_RSAPrivateKey_ASN1(SSL_CTX *ctx, const uint8_t *der,
+                                   size_t der_len) {
+  RSA *rsa = RSA_private_key_from_bytes(der, der_len);
   if (rsa == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_RSAPrivateKey_ASN1, ERR_R_ASN1_LIB);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_ASN1_LIB);
     return 0;
   }
 
-  ret = SSL_CTX_use_RSAPrivateKey(ctx, rsa);
+  int ret = SSL_CTX_use_RSAPrivateKey(ctx, rsa);
   RSA_free(rsa);
   return ret;
 }
 
 int SSL_CTX_use_PrivateKey(SSL_CTX *ctx, EVP_PKEY *pkey) {
   if (pkey == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_PrivateKey, ERR_R_PASSED_NULL_PARAMETER);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_PASSED_NULL_PARAMETER);
     return 0;
   }
 
   return ssl_set_pkey(ctx->cert, pkey);
 }
 
-int SSL_CTX_use_PrivateKey_file(SSL_CTX *ctx, const char *file, int type) {
-  int reason_code, ret = 0;
-  BIO *in;
-  EVP_PKEY *pkey = NULL;
-
-  in = BIO_new(BIO_s_file());
-  if (in == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_PrivateKey_file, ERR_R_BUF_LIB);
-    goto end;
-  }
-
-  if (BIO_read_filename(in, file) <= 0) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_PrivateKey_file, ERR_R_SYS_LIB);
-    goto end;
-  }
-
-  if (type == SSL_FILETYPE_PEM) {
-    reason_code = ERR_R_PEM_LIB;
-    pkey = PEM_read_bio_PrivateKey(in, NULL, ctx->default_passwd_callback,
-                                   ctx->default_passwd_callback_userdata);
-  } else if (type == SSL_FILETYPE_ASN1) {
-    reason_code = ERR_R_ASN1_LIB;
-    pkey = d2i_PrivateKey_bio(in, NULL);
-  } else {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_PrivateKey_file, SSL_R_BAD_SSL_FILETYPE);
-    goto end;
-  }
-
-  if (pkey == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_PrivateKey_file, reason_code);
-    goto end;
-  }
-  ret = SSL_CTX_use_PrivateKey(ctx, pkey);
-  EVP_PKEY_free(pkey);
-
-end:
-  BIO_free(in);
-  return ret;
-}
-
 int SSL_CTX_use_PrivateKey_ASN1(int type, SSL_CTX *ctx, const uint8_t *d,
                                 long len) {
   int ret;
@@ -562,7 +296,7 @@ int SSL_CTX_use_PrivateKey_ASN1(int type, SSL_CTX *ctx, const uint8_t *d,
   p = d;
   pkey = d2i_PrivateKey(type, NULL, &p, (long)len);
   if (pkey == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_PrivateKey_ASN1, ERR_R_ASN1_LIB);
+    OPENSSL_PUT_ERROR(SSL, ERR_R_ASN1_LIB);
     return 0;
   }
 
@@ -571,76 +305,74 @@ int SSL_CTX_use_PrivateKey_ASN1(int type, SSL_CTX *ctx, const uint8_t *d,
   return ret;
 }
 
+void SSL_set_private_key_method(SSL *ssl,
+                                const SSL_PRIVATE_KEY_METHOD *key_method) {
+  ssl->cert->key_method = key_method;
+}
 
-/* Read a file that contains our certificate in "PEM" format, possibly followed
- * by a sequence of CA certificates that should be sent to the peer in the
- * Certificate message. */
-int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file) {
-  BIO *in;
-  int ret = 0;
-  X509 *x = NULL;
-
-  ERR_clear_error(); /* clear error stack for SSL_CTX_use_certificate() */
+int SSL_set_private_key_digest_prefs(SSL *ssl, const int *digest_nids,
+                                     size_t num_digests) {
+  OPENSSL_free(ssl->cert->digest_nids);
 
-  in = BIO_new(BIO_s_file());
-  if (in == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_certificate_chain_file, ERR_R_BUF_LIB);
-    goto end;
+  ssl->cert->num_digest_nids = 0;
+  ssl->cert->digest_nids = BUF_memdup(digest_nids, num_digests*sizeof(int));
+  if (ssl->cert->digest_nids == NULL) {
+    OPENSSL_PUT_ERROR(SSL, ERR_R_MALLOC_FAILURE);
+    return 0;
   }
 
-  if (BIO_read_filename(in, file) <= 0) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_certificate_chain_file, ERR_R_SYS_LIB);
-    goto end;
-  }
+  ssl->cert->num_digest_nids = num_digests;
+  return 1;
+}
 
-  x = PEM_read_bio_X509_AUX(in, NULL, ctx->default_passwd_callback,
-                            ctx->default_passwd_callback_userdata);
-  if (x == NULL) {
-    OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_certificate_chain_file, ERR_R_PEM_LIB);
-    goto end;
+int ssl_has_private_key(SSL *ssl) {
+  return ssl->cert->privatekey != NULL || ssl->cert->key_method != NULL;
+}
+
+int ssl_private_key_type(SSL *ssl) {
+  if (ssl->cert->key_method != NULL) {
+    return ssl->cert->key_method->type(ssl);
   }
+  return EVP_PKEY_id(ssl->cert->privatekey);
+}
 
-  ret = SSL_CTX_use_certificate(ctx, x);
+size_t ssl_private_key_max_signature_len(SSL *ssl) {
+  if (ssl->cert->key_method != NULL) {
+    return ssl->cert->key_method->max_signature_len(ssl);
+  }
+  return EVP_PKEY_size(ssl->cert->privatekey);
+}
 
-  if (ERR_peek_error() != 0) {
-    ret = 0; /* Key/certificate mismatch doesn't imply ret==0 ... */
+enum ssl_private_key_result_t ssl_private_key_sign(
+    SSL *ssl, uint8_t *out, size_t *out_len, size_t max_out, const EVP_MD *md,
+    const uint8_t *in, size_t in_len) {
+  if (ssl->cert->key_method != NULL) {
+    return ssl->cert->key_method->sign(ssl, out, out_len, max_out, md, in,
+                                       in_len);
   }
 
-  if (ret) {
-    /* If we could set up our certificate, now proceed to the CA
-     * certificates. */
-    X509 *ca;
-    int r;
-    uint32_t err;
-
-    SSL_CTX_clear_chain_certs(ctx);
-
-    while ((ca = PEM_read_bio_X509(in, NULL, ctx->default_passwd_callback,
-                                   ctx->default_passwd_callback_userdata)) !=
-           NULL) {
-      r = SSL_CTX_add0_chain_cert(ctx, ca);
-      if (!r) {
-        X509_free(ca);
-        ret = 0;
-        goto end;
-      }
-      /* Note that we must not free r if it was successfully added to the chain
-       * (while we must free the main certificate, since its reference count is
-       * increased by SSL_CTX_use_certificate). */
-    }
+  enum ssl_private_key_result_t ret = ssl_private_key_failure;
+  EVP_PKEY_CTX *ctx = EVP_PKEY_CTX_new(ssl->cert->privatekey, NULL);
+  if (ctx == NULL) {
+    goto end;
+  }
 
-    /* When the while loop ends, it's usually just EOF. */
-    err = ERR_peek_last_error();
-    if (ERR_GET_LIB(err) == ERR_LIB_PEM &&
-        ERR_GET_REASON(err) == PEM_R_NO_START_LINE) {
-      ERR_clear_error();
-    } else {
-      ret = 0; /* some real error */
-    }
+  size_t len = max_out;
+  if (!EVP_PKEY_sign_init(ctx) ||
+      !EVP_PKEY_CTX_set_signature_md(ctx, md) ||
+      !EVP_PKEY_sign(ctx, out, &len, in, in_len)) {
+    goto end;
   }
+  *out_len = len;
+  ret = ssl_private_key_success;
 
 end:
-  X509_free(x);
-  BIO_free(in);
+  EVP_PKEY_CTX_free(ctx);
   return ret;
 }
+
+enum ssl_private_key_result_t ssl_private_key_sign_complete(
+    SSL *ssl, uint8_t *out, size_t *out_len, size_t max_out) {
+  /* Only custom keys may be asynchronous. */
+  return ssl->cert->key_method->sign_complete(ssl, out, out_len, max_out);
+}