It looks like I need to call init() after new()
m_evpCtx = EVP_ENCODE_CTX_new();
EVP_EncodeInit(m_evpCtx);
From: openssl-users On Behalf Of
Floodeenjr, Thomas
Sent: Thursday, February 6, 2020 2:22 PM
To: openssl-users@openssl.org
Subject: RE: Migrating from 1.0.2 g to 1.1.1d
With the old init syntax in 1.0.2, EVP_EncodeInit(_evpCtx);, m_evpCtx->
length is initialized to '48'.
With the new syntax in 1.1.1, m_evpCtx = EVP_ENCODE_CTX_new();, m_evpCtx->
length is initialized to '0.
I believe this causes the while loop to loop forever until INT_MAX, thus
overrunning my buffer.
Why does EVP_ENCODE_CTX_new() initialize to '0'? How do I fix this problem?
Thanks,
-Tom
From: openssl-users
mailto:openssl-users-boun...@openssl.org>>
On Behalf Of Floodeenjr, Thomas
Sent: Thursday, February 6, 2020 11:25 AM
To: openssl-users@openssl.org<mailto:openssl-users@openssl.org>
Subject: Migrating from 1.0.2 g to 1.1.1d
Hello,
We are in the process of migrating from 1.0.2g to 1.1.1d. We adjusted to the
changes, we think, and everything compiles. Many things also execute correctly.
We are currently seeing a crash in EVP_EncodeUpdate() after we process most of
our data. (last line of the while loop, line 202, *out = '\0';)
while (inl >= ctx->length && total <= INT_MAX) {
j = evp_encodeblock_int(ctx, out, in, ctx->length);
in += ctx->length;
inl -= ctx->length;
out += j;
total += j;
if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0) {
*(out++) = '\n';
total++;
}
*out = '\0';
}
> ModuleName.dll!EVP_EncodeUpdate(evp_Encode_Ctx_st * ctx, unsigned
> char * out, int * outl, const unsigned char * in, int inl) Line 202
>C
We call it the function like this:
EVP_EncodeUpdate(m_evpCtx, [0], , &_vInData[0], (int) nInSize);
EVP_ENCODE_CTX *m_evpCtx;
std::vector vTmpOut;
int nOutSize;
std::vector & _vInData;
I know that EVP_EncodeUpdate() is vastly different between 1.0.2 and 1.1.1. Is
there a problem with me calling the function this way? It has worked for many
years using 1.0.1.
Any insight is appreciated.
Thanks,
-Tom
