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#include <string.h>

#include <openssl/err.h>

#include <openssl/fips.h>

#include "crypto/fips.h"

#include <openssl/cmac.h>

#include "fips_locl.h"

#ifdef OPENSSL_FIPS

typedef struct {

    int nid;

    const unsigned char key[EVP_MAX_KEY_LENGTH];

    size_t keysize;

    const unsigned char msg[64];

    size_t msgsize;

    const unsigned char mac[32];

    size_t macsize;

} CMAC_KAT;

/* from http://csrc.nist.gov/publications/nistpubs/800-38B/SP_800-38B.pdf */

static const CMAC_KAT vector[] = {

    {NID_aes_128_cbc,           /* Count = 32 from CMACGenAES128.txt */

     {0x77, 0xa7, 0x7f, 0xaf, 0x29, 0x0c, 0x1f, 0xa3,

      0x0c, 0x68, 0x3d, 0xf1, 0x6b, 0xa7, 0xa7, 0x7b,}, 128,

     {0x02, 0x06, 0x83, 0xe1, 0xf0, 0x39, 0x2f, 0x4c,

      0xac, 0x54, 0x31, 0x8b, 0x60, 0x29, 0x25, 0x9e,

      0x9c, 0x55, 0x3d, 0xbc, 0x4b, 0x6a, 0xd9, 0x98,

      0xe6, 0x4d, 0x58, 0xe4, 0xe7, 0xdc, 0x2e, 0x13,}, 256,

     {0xfb, 0xfe, 0xa4, 0x1b,}, 32},

    {NID_aes_192_cbc,           /* Count = 23 from CMACGenAES192.txt */

     {0x7b, 0x32, 0x39, 0x13, 0x69, 0xaa, 0x4c, 0xa9,

      0x75, 0x58, 0x09, 0x5b, 0xe3, 0xc3, 0xec, 0x86,

      0x2b, 0xd0, 0x57, 0xce, 0xf1, 0xe3, 0x2d, 0x62,}, 192,

     {0x0}, 0,

     {0xe4, 0xd9, 0x34, 0x0b, 0x03, 0xe6, 0x7d, 0xef,

      0xd4, 0x96, 0x9c, 0xc1, 0xed, 0x37, 0x35, 0xe6,}, 128,

     },

    {NID_aes_256_cbc,           /* Count = 33 from CMACGenAES256.txt */

     {0x0b, 0x12, 0x2a, 0xc8, 0xf3, 0x4e, 0xd1, 0xfe,

      0x08, 0x2a, 0x36, 0x25, 0xd1, 0x57, 0x56, 0x14,

      0x54, 0x16, 0x7a, 0xc1, 0x45, 0xa1, 0x0b, 0xbf,

      0x77, 0xc6, 0xa7, 0x05, 0x96, 0xd5, 0x74, 0xf1,}, 256,

     {0x49, 0x8b, 0x53, 0xfd, 0xec, 0x87, 0xed, 0xcb,

      0xf0, 0x70, 0x97, 0xdc, 0xcd, 0xe9, 0x3a, 0x08,

      0x4b, 0xad, 0x75, 0x01, 0xa2, 0x24, 0xe3, 0x88,

      0xdf, 0x34, 0x9c, 0xe1, 0x89, 0x59, 0xfe, 0x84,

      0x85, 0xf8, 0xad, 0x15, 0x37, 0xf0, 0xd8, 0x96,

      0xea, 0x73, 0xbe, 0xdc, 0x72, 0x14, 0x71, 0x3f,}, 384,

     {0xf6, 0x2c, 0x46, 0x32, 0x9b,}, 40,

     },

    {NID_des_ede3_cbc,          /* Count = 41 from CMACGenTDES3.req */

     {0x89, 0xbc, 0xd9, 0x52, 0xa8, 0xc8, 0xab, 0x37,

      0x1a, 0xf4, 0x8a, 0xc7, 0xd0, 0x70, 0x85, 0xd5,

      0xef, 0xf7, 0x02, 0xe6, 0xd6, 0x2c, 0xdc, 0x23,}, 192,

     {0xfa, 0x62, 0x0c, 0x1b, 0xbe, 0x97, 0x31, 0x9e,

      0x9a, 0x0c, 0xf0, 0x49, 0x21, 0x21, 0xf7, 0xa2,

      0x0e, 0xb0, 0x8a, 0x6a, 0x70, 0x9d, 0xcb, 0xd0,

      0x0a, 0xaf, 0x38, 0xe4, 0xf9, 0x9e, 0x75, 0x4e,}, 256,

     {0x8f, 0x49, 0xa1, 0xb7, 0xd6, 0xaa, 0x22, 0x58,}, 64,

     },

};

int FIPS_selftest_cmac()

{

    size_t n, outlen;

    unsigned char out[32];

    const EVP_CIPHER *cipher;

    CMAC_CTX *ctx = CMAC_CTX_new();

    const CMAC_KAT *t;

    int rv = 1;

    for (n = 0, t = vector; n < sizeof(vector) / sizeof(vector[0]); n++, t++) {

        cipher = EVP_get_cipherbynid(t->nid);

        if (!cipher) {

            rv = -1;

            goto err;

        }

        if (!CMAC_Init(ctx, t->key, t->keysize / 8, cipher, 0)) {

            rv = -1;

            goto err;

        }

        if (!CMAC_Update(ctx, t->msg, t->msgsize / 8)) {

            rv = -1;

            goto err;

        }

        if (!CMAC_Final(ctx, out, &outlen)) {

            rv = -1;

            goto err;

        }

        if (outlen < t->macsize / 8 || memcmp(out, t->mac, t->macsize / 8)) {

            rv = 0;

        }

    }

 err:

    CMAC_CTX_free(ctx);

    if (rv == -1) {

        rv = 0;

    }

    if (!rv)

        FIPSerr(FIPS_F_FIPS_SELFTEST_CMAC, FIPS_R_SELFTEST_FAILED);

    return rv;

}

#endif