aboutsummaryrefslogtreecommitdiff
path: root/openssl/crypto/evp/bio_ok.c
diff options
context:
space:
mode:
Diffstat (limited to 'openssl/crypto/evp/bio_ok.c')
-rw-r--r--openssl/crypto/evp/bio_ok.c103
1 files changed, 76 insertions, 27 deletions
diff --git a/openssl/crypto/evp/bio_ok.c b/openssl/crypto/evp/bio_ok.c
index 98bc1ab40..e64335353 100644
--- a/openssl/crypto/evp/bio_ok.c
+++ b/openssl/crypto/evp/bio_ok.c
@@ -133,10 +133,10 @@ static int ok_new(BIO *h);
static int ok_free(BIO *data);
static long ok_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp);
-static void sig_out(BIO* b);
-static void sig_in(BIO* b);
-static void block_out(BIO* b);
-static void block_in(BIO* b);
+static int sig_out(BIO* b);
+static int sig_in(BIO* b);
+static int block_out(BIO* b);
+static int block_in(BIO* b);
#define OK_BLOCK_SIZE (1024*4)
#define OK_BLOCK_BLOCK 4
#define IOBS (OK_BLOCK_SIZE+ OK_BLOCK_BLOCK+ 3*EVP_MAX_MD_SIZE)
@@ -266,10 +266,24 @@ static int ok_read(BIO *b, char *out, int outl)
ctx->buf_len+= i;
/* no signature yet -- check if we got one */
- if (ctx->sigio == 1) sig_in(b);
+ if (ctx->sigio == 1)
+ {
+ if (!sig_in(b))
+ {
+ BIO_clear_retry_flags(b);
+ return 0;
+ }
+ }
/* signature ok -- check if we got block */
- if (ctx->sigio == 0) block_in(b);
+ if (ctx->sigio == 0)
+ {
+ if (!block_in(b))
+ {
+ BIO_clear_retry_flags(b);
+ return 0;
+ }
+ }
/* invalid block -- cancel */
if (ctx->cont <= 0) break;
@@ -293,7 +307,8 @@ static int ok_write(BIO *b, const char *in, int inl)
if ((ctx == NULL) || (b->next_bio == NULL) || (b->init == 0)) return(0);
- if(ctx->sigio) sig_out(b);
+ if(ctx->sigio && !sig_out(b))
+ return 0;
do{
BIO_clear_retry_flags(b);
@@ -332,7 +347,11 @@ static int ok_write(BIO *b, const char *in, int inl)
if(ctx->buf_len >= OK_BLOCK_SIZE+ OK_BLOCK_BLOCK)
{
- block_out(b);
+ if (!block_out(b))
+ {
+ BIO_clear_retry_flags(b);
+ return 0;
+ }
}
}while(inl > 0);
@@ -379,7 +398,8 @@ static long ok_ctrl(BIO *b, int cmd, long num, void *ptr)
case BIO_CTRL_FLUSH:
/* do a final write */
if(ctx->blockout == 0)
- block_out(b);
+ if (!block_out(b))
+ return 0;
while (ctx->blockout)
{
@@ -408,7 +428,8 @@ static long ok_ctrl(BIO *b, int cmd, long num, void *ptr)
break;
case BIO_C_SET_MD:
md=ptr;
- EVP_DigestInit_ex(&ctx->md, md, NULL);
+ if (!EVP_DigestInit_ex(&ctx->md, md, NULL))
+ return 0;
b->init=1;
break;
case BIO_C_GET_MD:
@@ -455,7 +476,7 @@ static void longswap(void *_ptr, size_t len)
}
}
-static void sig_out(BIO* b)
+static int sig_out(BIO* b)
{
BIO_OK_CTX *ctx;
EVP_MD_CTX *md;
@@ -463,9 +484,10 @@ static void sig_out(BIO* b)
ctx=b->ptr;
md=&ctx->md;
- if(ctx->buf_len+ 2* md->digest->md_size > OK_BLOCK_SIZE) return;
+ if(ctx->buf_len+ 2* md->digest->md_size > OK_BLOCK_SIZE) return 1;
- EVP_DigestInit_ex(md, md->digest, NULL);
+ if (!EVP_DigestInit_ex(md, md->digest, NULL))
+ goto berr;
/* FIXME: there's absolutely no guarantee this makes any sense at all,
* particularly now EVP_MD_CTX has been restructured.
*/
@@ -474,14 +496,20 @@ static void sig_out(BIO* b)
longswap(&(ctx->buf[ctx->buf_len]), md->digest->md_size);
ctx->buf_len+= md->digest->md_size;
- EVP_DigestUpdate(md, WELLKNOWN, strlen(WELLKNOWN));
- EVP_DigestFinal_ex(md, &(ctx->buf[ctx->buf_len]), NULL);
+ if (!EVP_DigestUpdate(md, WELLKNOWN, strlen(WELLKNOWN)))
+ goto berr;
+ if (!EVP_DigestFinal_ex(md, &(ctx->buf[ctx->buf_len]), NULL))
+ goto berr;
ctx->buf_len+= md->digest->md_size;
ctx->blockout= 1;
ctx->sigio= 0;
+ return 1;
+ berr:
+ BIO_clear_retry_flags(b);
+ return 0;
}
-static void sig_in(BIO* b)
+static int sig_in(BIO* b)
{
BIO_OK_CTX *ctx;
EVP_MD_CTX *md;
@@ -491,15 +519,18 @@ static void sig_in(BIO* b)
ctx=b->ptr;
md=&ctx->md;
- if((int)(ctx->buf_len-ctx->buf_off) < 2*md->digest->md_size) return;
+ if((int)(ctx->buf_len-ctx->buf_off) < 2*md->digest->md_size) return 1;
- EVP_DigestInit_ex(md, md->digest, NULL);
+ if (!EVP_DigestInit_ex(md, md->digest, NULL))
+ goto berr;
memcpy(md->md_data, &(ctx->buf[ctx->buf_off]), md->digest->md_size);
longswap(md->md_data, md->digest->md_size);
ctx->buf_off+= md->digest->md_size;
- EVP_DigestUpdate(md, WELLKNOWN, strlen(WELLKNOWN));
- EVP_DigestFinal_ex(md, tmp, NULL);
+ if (!EVP_DigestUpdate(md, WELLKNOWN, strlen(WELLKNOWN)))
+ goto berr;
+ if (!EVP_DigestFinal_ex(md, tmp, NULL))
+ goto berr;
ret= memcmp(&(ctx->buf[ctx->buf_off]), tmp, md->digest->md_size) == 0;
ctx->buf_off+= md->digest->md_size;
if(ret == 1)
@@ -516,9 +547,13 @@ static void sig_in(BIO* b)
{
ctx->cont= 0;
}
+ return 1;
+ berr:
+ BIO_clear_retry_flags(b);
+ return 0;
}
-static void block_out(BIO* b)
+static int block_out(BIO* b)
{
BIO_OK_CTX *ctx;
EVP_MD_CTX *md;
@@ -532,13 +567,20 @@ static void block_out(BIO* b)
ctx->buf[1]=(unsigned char)(tl>>16);
ctx->buf[2]=(unsigned char)(tl>>8);
ctx->buf[3]=(unsigned char)(tl);
- EVP_DigestUpdate(md, (unsigned char*) &(ctx->buf[OK_BLOCK_BLOCK]), tl);
- EVP_DigestFinal_ex(md, &(ctx->buf[ctx->buf_len]), NULL);
+ if (!EVP_DigestUpdate(md,
+ (unsigned char*) &(ctx->buf[OK_BLOCK_BLOCK]), tl))
+ goto berr;
+ if (!EVP_DigestFinal_ex(md, &(ctx->buf[ctx->buf_len]), NULL))
+ goto berr;
ctx->buf_len+= md->digest->md_size;
ctx->blockout= 1;
+ return 1;
+ berr:
+ BIO_clear_retry_flags(b);
+ return 0;
}
-static void block_in(BIO* b)
+static int block_in(BIO* b)
{
BIO_OK_CTX *ctx;
EVP_MD_CTX *md;
@@ -554,10 +596,13 @@ static void block_in(BIO* b)
tl|=ctx->buf[2]; tl<<=8;
tl|=ctx->buf[3];
- if (ctx->buf_len < tl+ OK_BLOCK_BLOCK+ md->digest->md_size) return;
+ if (ctx->buf_len < tl+ OK_BLOCK_BLOCK+ md->digest->md_size) return 1;
- EVP_DigestUpdate(md, (unsigned char*) &(ctx->buf[OK_BLOCK_BLOCK]), tl);
- EVP_DigestFinal_ex(md, tmp, NULL);
+ if (!EVP_DigestUpdate(md,
+ (unsigned char*) &(ctx->buf[OK_BLOCK_BLOCK]), tl))
+ goto berr;
+ if (!EVP_DigestFinal_ex(md, tmp, NULL))
+ goto berr;
if(memcmp(&(ctx->buf[tl+ OK_BLOCK_BLOCK]), tmp, md->digest->md_size) == 0)
{
/* there might be parts from next block lurking around ! */
@@ -571,5 +616,9 @@ static void block_in(BIO* b)
{
ctx->cont= 0;
}
+ return 1;
+ berr:
+ BIO_clear_retry_flags(b);
+ return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-08 15:04:32 +0000