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krb5: Stash the HMAC context in the krb5_crypto object

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Store the EVP HMAC context in the krb5_crypto object so that we
don't have to allocate it for every hashing operating we perform.
This commit is contained in:
Simon Wilkinson
2018-05-14 14:21:41 +01:00
committed by Jeffrey Altman
parent e50faea7f0
commit b9b8e76376
4 changed files with 17 additions and 4 deletions
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12
lib/krb5/crypto-evp.c
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@@ -114,6 +114,7 @@ out:
krb5_error_code
_krb5_evp_hmac_iov(krb5_context context,
krb5_crypto crypto,
struct _krb5_key_data *key,
const struct krb5_crypto_iov *iov,
int niov,
@@ -126,7 +127,13 @@ _krb5_evp_hmac_iov(krb5_context context,
krb5_data current = {0, 0};
int i;
ctx = HMAC_CTX_new();
if (crypto != NULL) {
if (crypto->hmacctx == NULL)
crypto->hmacctx = HMAC_CTX_new();
ctx = crypto->hmacctx;
} else {
ctx = HMAC_CTX_new();
}
if (ctx == NULL)
return krb5_enomem(context);
@@ -150,7 +157,8 @@ _krb5_evp_hmac_iov(krb5_context context,
HMAC_Final(ctx, hmac, hmaclen);
HMAC_CTX_free(ctx);
if (crypto == NULL)
HMAC_CTX_free(ctx);
return 0;
}