diff options
Diffstat (limited to 'cipher/cipher-ccm.c')
| -rw-r--r-- | cipher/cipher-ccm.c | 88 |
1 files changed, 82 insertions, 6 deletions
diff --git a/cipher/cipher-ccm.c b/cipher/cipher-ccm.c index d2b88415..47f2162e 100644 --- a/cipher/cipher-ccm.c +++ b/cipher/cipher-ccm.c @@ -29,6 +29,9 @@ #include "bufhelp.h" #include "./cipher-internal.h" +/* We need a 64 bit type for this code. */ +#ifdef HAVE_U64_TYPEDEF + #define set_burn(burn, nburn) do { \ unsigned int __nburn = (nburn); \ @@ -149,14 +152,14 @@ _gcry_cipher_ccm_set_nonce (gcry_cipher_hd_t c, const unsigned char *nonce, gcry_err_code_t -_gcry_cipher_ccm_set_lengths (gcry_cipher_hd_t c, size_t encryptlen, - size_t aadlen, size_t taglen) +_gcry_cipher_ccm_set_lengths (gcry_cipher_hd_t c, u64 encryptlen, u64 aadlen, + u64 taglen) { unsigned int burn = 0; unsigned char b0[16]; size_t noncelen = 15 - (c->u_iv.iv[0] + 1); - size_t M = taglen; - size_t M_; + u64 M = taglen; + u64 M_; int i; M_ = (M - 2) / 2; @@ -203,7 +206,6 @@ _gcry_cipher_ccm_set_lengths (gcry_cipher_hd_t c, size_t encryptlen, buf_put_be32(&b0[2], aadlen); set_burn (burn, do_cbc_mac (c, b0, 6, 0)); } -#ifdef HAVE_U64_TYPEDEF else if (aadlen > (unsigned int)0xffffffff) { b0[0] = 0xff; @@ -211,7 +213,6 @@ _gcry_cipher_ccm_set_lengths (gcry_cipher_hd_t c, size_t encryptlen, buf_put_be64(&b0[2], aadlen); set_burn (burn, do_cbc_mac (c, b0, 10, 0)); } -#endif /* Generate S_0 and increase counter. */ set_burn (burn, c->spec->encrypt ( &c->context.c, c->u_mode.ccm.s0, @@ -364,3 +365,78 @@ _gcry_cipher_ccm_decrypt (gcry_cipher_hd_t c, unsigned char *outbuf, return err; } + +#else + +/* + * Provide dummy functions so that we avoid adding too much #ifdefs in + * cipher.c. + */ + +gcry_err_code_t +_gcry_cipher_ccm_encrypt(gcry_cipher_hd_t c, unsigned char *outbuf, + size_t outbuflen, const unsigned char *inbuf, + size_t inbuflen) +{ + (void)c; + (void)outbuf; + (void)outbuflen; + (void)inbuf; + (void)inbuflen; + return GPG_ERR_NOT_SUPPORTED; +} + +gcry_err_code_t +_gcry_cipher_ccm_decrypt(gcry_cipher_hd_t c, unsigned char *outbuf, + size_t outbuflen, const unsigned char *inbuf, + size_t inbuflen) +{ + (void)c; + (void)outbuf; + (void)outbuflen; + (void)inbuf; + (void)inbuflen; + return GPG_ERR_NOT_SUPPORTED; +} + +gcry_err_code_t +_gcry_cipher_ccm_set_nonce(gcry_cipher_hd_t c, const unsigned char *nonce, + size_t noncelen) +{ + (void)c; + (void)nonce; + (void)noncelen; + return GPG_ERR_NOT_SUPPORTED; +} + +gcry_err_code_t +_gcry_cipher_ccm_authenticate(gcry_cipher_hd_t c, const unsigned char *abuf, + size_t abuflen) +{ + (void)c; + (void)abuf; + (void)abuflen; + return GPG_ERR_NOT_SUPPORTED; +} + +gcry_err_code_t +_gcry_cipher_ccm_get_tag(gcry_cipher_hd_t c, unsigned char *outtag, + size_t taglen) +{ + (void)c; + (void)outtag; + (void)taglen; + return GPG_ERR_NOT_SUPPORTED; +} + +gcry_err_code_t +_gcry_cipher_ccm_check_tag(gcry_cipher_hd_t c, const unsigned char *intag, + size_t taglen) +{ + (void)c; + (void)intag; + (void)taglen; + return GPG_ERR_NOT_SUPPORTED; +} + +#endif /*HAVE_U64_TYPEDEF*/ |