#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include "os.h"
#include "xsha1.h"

#ifdef HAVE_SHA1_IN_LIBMD /* Use libmd for SHA1 */

# include <sha1.h>

void *x_sha1_init(void)
{
    SHA1_CTX *ctx = xalloc(sizeof(*ctx));
    if (!ctx)
        return NULL;
    SHA1Init(ctx);
    return ctx;
}

int x_sha1_update(void *ctx, void *data, int size)
{
    SHA1_CTX *sha1_ctx = ctx;
    SHA1Update(sha1_ctx, data, size);
    return 1;
}

int x_sha1_final(void *ctx, unsigned char result[20])
{
    SHA1_CTX *sha1_ctx = ctx;
    SHA1Final(result, sha1_ctx);
    xfree(sha1_ctx);
    return 1;
}

#else /* Use OpenSSL's libcrypto */

# include <stddef.h>  /* buggy openssl/sha.h wants size_t */
# include <openssl/sha.h>

void *x_sha1_init(void)
{
    int ret;
    SHA_CTX *ctx = xalloc(sizeof(*ctx));
    if (!ctx)
        return NULL;
    ret = SHA1_Init(ctx);
    if (!ret) {
        xfree(ctx);
        return NULL;
    }
    return ctx;
}

int x_sha1_update(void *ctx, void *data, int size)
{
    int ret;
    SHA_CTX *sha_ctx = ctx;
    ret = SHA1_Update(sha_ctx, data, size);
    if (!ret)
        xfree(sha_ctx);
    return ret;
}

int x_sha1_final(void *ctx, unsigned char result[20])
{
    int ret;
    SHA_CTX *sha_ctx = ctx;
    ret = SHA1_Final(result, sha_ctx);
    xfree(sha_ctx);
    return ret;
}

#endif