src/usr.bin/ssh/roaming_common.c - diff

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version 1.11, 2013/11/03 10:37:19

version 1.12, 2014/01/09 23:20:00

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#include "cipher.h"

#include "buffer.h"

#include "roaming.h"

#include "digest.h"

static size_t out_buf_size = 0;

static char *out_buf = NULL;

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void

calculate_new_key(u_int64_t *key, u_int64_t cookie, u_int64_t challenge)

{

const EVP_MD *md = EVP_sha1();

u_char hash[SSH_DIGEST_MAX_LENGTH];

EVP_MD_CTX ctx;

u_char hash[EVP_MAX_MD_SIZE];

Buffer b;

buffer_init(&b);

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buffer_put_int64(&b, cookie);

buffer_put_int64(&b, challenge);

EVP_DigestInit(&ctx, md);

if (ssh_digest_buffer(SSH_DIGEST_SHA1, &b, hash, sizeof(hash)) != 0)

EVP_DigestUpdate(&ctx, buffer_ptr(&b), buffer_len(&b));

fatal("%s: digest_buffer failed", __func__);

EVP_DigestFinal(&ctx, hash, NULL);

buffer_clear(&b);

buffer_append(&b, hash, EVP_MD_size(md));

buffer_append(&b, hash, ssh_digest_bytes(SSH_DIGEST_SHA1));

*key = buffer_get_int64(&b);

buffer_free(&b);

}