Port to boringssl.
With this change the TPM2 code will build and run correctly with
boringssl.
BUG=26192013
Change-Id: I79002c7747039f16bfa5324d136033c00a3b55f1
diff --git a/OsslCryptoEngine.h b/OsslCryptoEngine.h
index 7217e8a..3c5f3cb 100644
--- a/OsslCryptoEngine.h
+++ b/OsslCryptoEngine.h
@@ -28,6 +28,38 @@
# endif
# include "CpriRSA_fp.h"
#endif
+
+#ifdef OPENSSL_IS_BORINGSSL
+// libtpm2 reads internal EVP_MD state (e.g. ctx_size). The boringssl headers
+// don't expose this type so define it here.
+struct env_md_st {
+ /* type contains a NID identifing the digest function. (For example,
+ * NID_md5.) */
+ int type;
+
+ /* md_size contains the size, in bytes, of the resulting digest. */
+ unsigned md_size;
+
+ /* flags contains the OR of |EVP_MD_FLAG_*| values. */
+ uint32_t flags;
+
+ /* init initialises the state in |ctx->md_data|. */
+ void (*init)(EVP_MD_CTX *ctx);
+
+ /* update hashes |len| bytes of |data| into the state in |ctx->md_data|. */
+ void (*update)(EVP_MD_CTX *ctx, const void *data, size_t count);
+
+ /* final completes the hash and writes |md_size| bytes of digest to |out|. */
+ void (*final)(EVP_MD_CTX *ctx, uint8_t *out);
+
+ /* block_size contains the hash's native block size. */
+ unsigned block_size;
+
+ /* ctx_size contains the size, in bytes, of the state of the hash function. */
+ unsigned ctx_size;
+};
+#endif
+
//
// This is a structure to hold the parameters for the version of KDFa() used by the CryptoEngine(). This
// structure allows the state to be passed between multiple functions that use the same pseudo-random