tools: mkimage: fix build with OpenSSL 1.1.x (FS#182)

The OpenSSL 1.1.x version series undergone some major API changes which made
the RSA structure opaque and deprecated a number of methods, so add some
conditional compat code to make the u-boot source build again.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

diff --git a/tools/mkimage/patches/210-openssl-1.1.x-compat.patch b/tools/mkimage/patches/210-openssl-1.1.x-compat.patch
new file mode 100644 (file)
index 0000000..fa7c99f
--- /dev/null
+++ b/tools/mkimage/patches/210-openssl-1.1.x-compat.patch
@@ -0,0 +1,97 @@
+--- a/lib/rsa/rsa-sign.c
++++ b/lib/rsa/rsa-sign.c
+@@ -15,10 +15,25 @@
+ #include <openssl/ssl.h>
+ #include <openssl/evp.h>
+ 
+-#if OPENSSL_VERSION_NUMBER >= 0x10000000L
++#if OPENSSL_VERSION_NUMBER < 0x10000000L
++#define HAVE_ERR_REMOVE_STATE
++#elif OPENSSL_VERSION_NUMBER < 0x10100000L
+ #define HAVE_ERR_REMOVE_THREAD_STATE
+ #endif
+ 
++#if OPENSSL_VERSION_NUMBER < 0x10100005L
++static void RSA_get0_key(const RSA *r,
++                         const BIGNUM **n, const BIGNUM **e, const BIGNUM **d)
++{
++   if (n != NULL)
++       *n = r->n;
++   if (e != NULL)
++       *e = r->e;
++   if (d != NULL)
++       *d = r->d;
++}
++#endif
++
+ static int rsa_err(const char *msg)
+ {
+       unsigned long sslErr = ERR_get_error();
+@@ -154,7 +169,8 @@ static void rsa_remove(void)
+       ERR_free_strings();
+ #ifdef HAVE_ERR_REMOVE_THREAD_STATE
+       ERR_remove_thread_state(NULL);
+-#else
++#endif
++#ifdef HAVE_ERR_REMOVE_STATE
+       ERR_remove_state(0);
+ #endif
+       EVP_cleanup();
+@@ -210,7 +226,6 @@ static int rsa_sign_with_key(RSA *rsa, s
+               ret = rsa_err("Could not obtain signature");
+               goto err_sign;
+       }
+-      EVP_MD_CTX_cleanup(context);
+       EVP_MD_CTX_destroy(context);
+       EVP_PKEY_free(key);
+ 
+@@ -270,23 +285,26 @@ static int rsa_get_exponent(RSA *key, ui
+       BIGNUM *bn_te;
+       uint64_t te;
+ 
++      const BIGNUM *bn_e;
++      RSA_get0_key(key, NULL, &bn_e, NULL);
++
+       ret = -EINVAL;
+       bn_te = NULL;
+ 
+       if (!e)
+               goto cleanup;
+ 
+-      if (BN_num_bits(key->e) > 64)
++      if (BN_num_bits(bn_e) > 64)
+               goto cleanup;
+ 
+-      *e = BN_get_word(key->e);
++      *e = BN_get_word(bn_e);
+ 
+-      if (BN_num_bits(key->e) < 33) {
++      if (BN_num_bits(bn_e) < 33) {
+               ret = 0;
+               goto cleanup;
+       }
+ 
+-      bn_te = BN_dup(key->e);
++      bn_te = BN_dup(bn_e);
+       if (!bn_te)
+               goto cleanup;
+ 
+@@ -319,6 +337,9 @@ int rsa_get_params(RSA *key, uint64_t *e
+       BN_CTX *bn_ctx = BN_CTX_new();
+       int ret = 0;
+ 
++      const BIGNUM *bn_n;
++      RSA_get0_key(key, &bn_n, NULL, NULL);
++
+       /* Initialize BIGNUMs */
+       big1 = BN_new();
+       big2 = BN_new();
+@@ -337,7 +358,7 @@ int rsa_get_params(RSA *key, uint64_t *e
+       if (0 != rsa_get_exponent(key, exponent))
+               ret = -1;
+ 
+-      if (!BN_copy(n, key->n) || !BN_set_word(big1, 1L) ||
++      if (!BN_copy(n, bn_n) || !BN_set_word(big1, 1L) ||
+           !BN_set_word(big2, 2L) || !BN_set_word(big32, 32L))
+               ret = -1;
+