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add ecc export pirvate only

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This commit is contained in:
toddouska 2013-10-29 16:44:33 -07:00
parent b377a60596
commit f402d7eed9
3 changed files with 32 additions and 0 deletions
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25
ctaocrypt/src/ecc.c
View File

@ -2043,6 +2043,31 @@ int ecc_import_x963(const byte* in, word32 inLen, ecc_key* key)
}
/* export ecc private key only raw, outLen is in/out size
return MP_OKAY on success */
int ecc_export_private_only(ecc_key* key, byte* out, word32* outLen)
{
word32 numlen;
if (key == NULL || out == NULL || outLen == NULL)
return ECC_BAD_ARG_E;
if (ecc_is_valid_idx(key->idx) == 0) {
return ECC_BAD_ARG_E;
}
numlen = key->dp->size;
if (*outLen < numlen) {
*outLen = numlen;
return BUFFER_E;
}
*outLen = numlen;
XMEMSET(out, 0, *outLen);
return mp_to_unsigned_bin(&key->k, out + (numlen -
mp_unsigned_bin_size(&key->k)));
}
/* ecc private key import, public key in ANSI X9.63 format, private raw */
int ecc_import_private_key(const byte* priv, word32 privSz, const byte* pub,
word32 pubSz, ecc_key* key)

5
ctaocrypt/test/test.c
View File

@ -3482,6 +3482,11 @@ int ecc_test(void)
if (verify != 1)
return -1012;
x = sizeof(exportBuf);
ret = ecc_export_private_only(&userA, exportBuf, &x);
if (ret != 0)
return -1013;
ecc_free(&pubKey);
ecc_free(&userB);
ecc_free(&userA);

2
cyassl/ctaocrypt/ecc.h
View File

@ -109,6 +109,8 @@ int ecc_import_x963(const byte* in, word32 inLen, ecc_key* key);
CYASSL_API
int ecc_import_private_key(const byte* priv, word32 privSz, const byte* pub,
word32 pubSz, ecc_key* key);
CYASSL_API
int ecc_export_private_only(ecc_key* key, byte* out, word32* outLen);
/* size helper */
CYASSL_API