Commit 31edde3e authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Add flag to avoid continuous 

memory allocate when calling EVP_MD_CTX_copy_ex().

Without this HMAC is several times slower than
< 0.9.7.
parent 381a693c

CHANGES

+6 −0
Original line number Diff line number Diff line
@@ -4,6 +4,12 @@ 


 Changes between 0.9.7c and 0.9.7d  [xx XXX XXXX]



  *) New md flag EVP_MD_CTX_FLAG_REUSE this allows md_data to be reused when

     calling EVP_MD_CTX_copy_ex() to avoid calling OPENSSL_malloc(). Without

     this HMAC (and other) operations are several times slower than OpenSSL

     < 0.9.7.

     [Steve Henson]



  *) Print out GeneralizedTime and UTCTime in ASN1_STRING_print_ex().

     [Peter Sylvester <Peter.Sylvester@EdelWeb.fr>]

crypto/evp/digest.c

+12 −3
Original line number Diff line number Diff line
@@ -248,6 +248,7 @@ int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in) 


int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)

	{

	unsigned char *tmp_buf;

	if ((in == NULL) || (in->digest == NULL))

		{

		EVPerr(EVP_F_EVP_MD_CTX_COPY,EVP_R_INPUT_NOT_INITIALIZED);
@@ -262,12 +263,19 @@ int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in) 
		}

#endif



	if (out->digest == in->digest)

		{

		tmp_buf = out->md_data;

	    	EVP_MD_CTX_set_flags(out,EVP_MD_CTX_FLAG_REUSE);

		}

	else tmp_buf = NULL;

	EVP_MD_CTX_cleanup(out);

	memcpy(out,in,sizeof *out);



	if (out->digest->ctx_size)

		{

		out->md_data=OPENSSL_malloc(out->digest->ctx_size);

		if (tmp_buf) out->md_data = tmp_buf;

		else out->md_data=OPENSSL_malloc(out->digest->ctx_size);

		memcpy(out->md_data,in->md_data,out->digest->ctx_size);

		}
@@ -308,7 +316,8 @@ int EVP_MD_CTX_cleanup(EVP_MD_CTX *ctx) 
	if (ctx->digest && ctx->digest->cleanup

	    && !EVP_MD_CTX_test_flags(ctx,EVP_MD_CTX_FLAG_CLEANED))

		ctx->digest->cleanup(ctx);

	if (ctx->digest && ctx->digest->ctx_size && ctx->md_data)

	if (ctx->digest && ctx->digest->ctx_size && ctx->md_data

	    && !EVP_MD_CTX_test_flags(ctx, EVP_MD_CTX_FLAG_REUSE))

		{

		OPENSSL_cleanse(ctx->md_data,ctx->digest->ctx_size);

		OPENSSL_free(ctx->md_data);

crypto/evp/evp.h

+2 −0
Original line number Diff line number Diff line
@@ -329,6 +329,8 @@ struct env_md_ctx_st 
						* once only */

#define EVP_MD_CTX_FLAG_CLEANED		0x0002 /* context has already been

						* cleaned */

#define EVP_MD_CTX_FLAG_REUSE		0x0004 /* Don't free up ctx->md_data

						* in EVP_MD_CTX_cleanup */



struct evp_cipher_st

	{