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Add flag to avoid continuous

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memory allocate when calling EVP_MD_CTX_copy_ex().

Without this HMAC is several times slower than
< 0.9.7.
This commit is contained in:
Dr. Stephen Henson 2004-02-01 13:39:51 +00:00
parent d04b1b4656
commit d4575825f1
3 changed files with 20 additions and 3 deletions
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6
CHANGES
View file

@ -617,6 +617,12 @@
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>]

15
crypto/evp/digest.c
View file

@ -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);
@ -262,15 +263,22 @@ 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);
}
if (out->digest->copy)
return out->digest->copy(out,in);
@ -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);

2
crypto/evp/evp.h
View file

@ -288,6 +288,8 @@ 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
{