In certain cases, no encoding has been set up for the b64 filter. In
such cases, a flush should *not* attempt to finalise the encoding, as
the EVP_ENCODE_CTX structure will only be filled with garbage. For
the same reason, do the same check when a wpending is performed.
diff --git a/crypto/evp/bio_b64.c b/crypto/evp/bio_b64.c
index af6fa2a..f12eac1 100644
--- a/crypto/evp/bio_b64.c
+++ b/crypto/evp/bio_b64.c
@@ -465,7 +465,8 @@
break;
case BIO_CTRL_WPENDING: /* More to write in buffer */
ret=ctx->buf_len-ctx->buf_off;
- if ((ret == 0) && (ctx->base64.num != 0))
+ if ((ret == 0) && (ctx->encode != B64_NONE)
+ && (ctx->base64.num != 0))
ret=1;
else if (ret <= 0)
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
@@ -500,7 +501,7 @@
goto again;
}
}
- else if (ctx->base64.num != 0)
+ else if (ctx->encode != B64_NONE && ctx->base64.num != 0)
{
ctx->buf_off=0;
EVP_EncodeFinal(&(ctx->base64),
