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(HMAC_Init_ex): also zero out key material on re-init.

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@21391 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2007-06-30 08:04:00 +00:00
parent 9f9e6d38bc
commit e8950bc2ae
1 changed files with 9 additions and 3 deletions
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12
lib/hcrypto/hmac.c
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@@ -52,8 +52,10 @@ HMAC_Init_ex(HMAC_CTX *ctx,
if (ctx->md != md) { if (ctx->md != md) {
ctx->md = md; ctx->md = md;
if (ctx->buf) if (ctx->buf) {
memset(ctx->buf, 0, ctx->key_length);
free (ctx->buf); free (ctx->buf);
}
ctx->key_length = EVP_MD_size(ctx->md); ctx->key_length = EVP_MD_size(ctx->md);
ctx->buf = malloc(ctx->key_length); ctx->buf = malloc(ctx->key_length);
} }
@@ -67,10 +69,14 @@ HMAC_Init_ex(HMAC_CTX *ctx,
keylen = EVP_MD_size(ctx->md); keylen = EVP_MD_size(ctx->md);
} }
if (ctx->opad) if (ctx->opad) {
memset(ctx->opad, 0, ctx->key_length);
free(ctx->opad); free(ctx->opad);
if (ctx->ipad) }
if (ctx->ipad) {
memset(ctx->ipad, 0, ctx->key_length);
free(ctx->ipad); free(ctx->ipad);
}
ctx->opad = malloc(EVP_MD_block_size(ctx->md)); ctx->opad = malloc(EVP_MD_block_size(ctx->md));
ctx->ipad = malloc(EVP_MD_block_size(ctx->md)); ctx->ipad = malloc(EVP_MD_block_size(ctx->md));