[openssl-dev] [openssl.org #4628] EVP_f_cipher regression due to overlapping regions check

[Greg Hudson via RT]

The attached test program works in 1.0, but fails in master with:

  a.out: crypto/evp/evp_enc.c:290: is_partially_overlapping: Assertion
`!condition' failed.

See also:

  https://mta.openssl.org/pipermail/openssl-dev/2016-July/007953.html

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#include <stdio.h>
#include <stdint.h>
#include <openssl/evp.h>
#include <openssl/bio.h>

int main()
{
    BIO *b;
    uint8_t key[16] = { 0 }, data[1024] = { 0 }, buf[4096];
    int l;

    b = BIO_new(BIO_f_cipher());
    BIO_set_cipher(b, EVP_aes_128_cbc(), key, NULL, 0);
    BIO_push(b, BIO_new_mem_buf(data, sizeof(data)));

    l = BIO_read(b, buf, sizeof(buf));
    printf("%d %d %d\n", l, buf[0], buf[1]);
    return 0;
}