[PATCH 3/4] crypt32: Add support for exporting public key information from a 3rd party CSP.
Signed-off-by: Dmitry Timoshkov dmitry@baikal.ru --- dlls/crypt32/encode.c | 90 ++++++++++++++++++++++++++++++++++++++----- 1 file changed, 81 insertions(+), 9 deletions(-)
diff --git a/dlls/crypt32/encode.c b/dlls/crypt32/encode.c index 62d2bc91f7..9a9850d683 100644 --- a/dlls/crypt32/encode.c +++ b/dlls/crypt32/encode.c @@ -4779,20 +4779,22 @@ BOOL WINAPI CryptExportPublicKeyInfo(HCRYPTPROV_OR_NCRYPT_KEY_HANDLE hCryptProv, NULL, 0, NULL, pInfo, pcbInfo); }
-static BOOL WINAPI CRYPT_ExportRsaPublicKeyInfoEx(HCRYPTPROV_OR_NCRYPT_KEY_HANDLE hCryptProv, +typedef BOOL (WINAPI *EncodePublicKeyAndParametersFunc)(DWORD dwCertEncodingType, + LPSTR pszPublicKeyObjId, BYTE *pbPubKey, DWORD cbPubKey, DWORD dwFlags, void *pvAuxInfo, + BYTE **ppPublicKey, DWORD *pcbPublicKey, BYTE **ppbParams, DWORD *pcbParams); + +static BOOL WINAPI CRYPT_ExportPublicKeyInfoEx(HCRYPTPROV_OR_NCRYPT_KEY_HANDLE hCryptProv, DWORD dwKeySpec, DWORD dwCertEncodingType, LPSTR pszPublicKeyObjId, DWORD dwFlags, void *pvAuxInfo, PCERT_PUBLIC_KEY_INFO pInfo, DWORD *pcbInfo) { BOOL ret; HCRYPTKEY key; - static CHAR oid[] = szOID_RSA_RSA; + static CHAR rsa_oid[] = szOID_RSA_RSA;
TRACE_(crypt)("(%08lx, %d, %08x, %s, %08x, %p, %p, %d)\n", hCryptProv, dwKeySpec, dwCertEncodingType, debugstr_a(pszPublicKeyObjId), dwFlags, pvAuxInfo, pInfo, pInfo ? *pcbInfo : 0);
- if (!pszPublicKeyObjId) - pszPublicKeyObjId = oid; if ((ret = CryptGetUserKey(hCryptProv, dwKeySpec, &key))) { DWORD keySize = 0; @@ -4800,16 +4802,86 @@ static BOOL WINAPI CRYPT_ExportRsaPublicKeyInfoEx(HCRYPTPROV_OR_NCRYPT_KEY_HANDL ret = CryptExportKey(key, 0, PUBLICKEYBLOB, 0, NULL, &keySize); if (ret) { - LPBYTE pubKey = CryptMemAlloc(keySize); + PUBLICKEYSTRUC *pubKey = CryptMemAlloc(keySize);
if (pubKey) { - ret = CryptExportKey(key, 0, PUBLICKEYBLOB, 0, pubKey, - &keySize); + ret = CryptExportKey(key, 0, PUBLICKEYBLOB, 0, (BYTE *)pubKey, &keySize); if (ret) { - DWORD encodedLen = 0; + DWORD encodedLen; + + if (!pszPublicKeyObjId) + { + static HCRYPTOIDFUNCSET set; + EncodePublicKeyAndParametersFunc encodeFunc = NULL; + HCRYPTOIDFUNCADDR hFunc = NULL; + + pszPublicKeyObjId = (LPSTR)CertAlgIdToOID(pubKey->aiKeyAlg); + TRACE("public key algid %#x (%s)\n", pubKey->aiKeyAlg, debugstr_a(pszPublicKeyObjId)); + + if (!set) /* FIXME: there is no a public macro */ + set = CryptInitOIDFunctionSet("CryptDllEncodePublicKeyAndParameters", 0); + + CryptGetOIDFunctionAddress(set, dwCertEncodingType, pszPublicKeyObjId, 0, (void **)&encodeFunc, &hFunc); + if (encodeFunc) + { + BYTE *key_data = NULL; + DWORD key_size = 0; + BYTE *params = NULL; + DWORD params_size = 0; + + ret = encodeFunc(dwCertEncodingType, pszPublicKeyObjId, (BYTE *)pubKey, keySize, + dwFlags, pvAuxInfo, &key_data, &key_size, ¶ms, ¶ms_size); + if (ret) + { + DWORD oid_size = strlen(pszPublicKeyObjId) + 1; + DWORD size_needed = sizeof(*pInfo) + oid_size + key_size + params_size; + + if (!pInfo) + *pcbInfo = size_needed; + else if (*pcbInfo < size_needed) + { + *pcbInfo = size_needed; + SetLastError(ERROR_MORE_DATA); + ret = FALSE; + } + else + { + *pcbInfo = size_needed; + pInfo->Algorithm.pszObjId = (char *)(pInfo + 1); + lstrcpyA(pInfo->Algorithm.pszObjId, pszPublicKeyObjId); + if (params) + { + pInfo->Algorithm.Parameters.cbData = params_size; + pInfo->Algorithm.Parameters.pbData = (BYTE *)pInfo->Algorithm.pszObjId + oid_size; + memcpy(pInfo->Algorithm.Parameters.pbData, params, params_size); + } + else + { + pInfo->Algorithm.Parameters.cbData = 0; + pInfo->Algorithm.Parameters.pbData = NULL; + } + pInfo->PublicKey.pbData = (BYTE *)pInfo->Algorithm.pszObjId + oid_size + params_size; + pInfo->PublicKey.cbData = key_size; + memcpy(pInfo->PublicKey.pbData, key_data, key_size); + pInfo->PublicKey.cUnusedBits = 0; + } + + CryptMemFree(key_data); + CryptMemFree(params); + } + + CryptMemFree(pubKey); + CryptFreeOIDFunctionAddress(hFunc, 0); + return ret; + } + + /* fallback to RSA */ + pszPublicKeyObjId = rsa_oid; + }
+ encodedLen = 0; ret = CryptEncodeObject(dwCertEncodingType, RSA_CSP_PUBLICKEYBLOB, pubKey, NULL, &encodedLen); if (ret) @@ -4887,7 +4959,7 @@ BOOL WINAPI CryptExportPublicKeyInfoEx(HCRYPTPROV_OR_NCRYPT_KEY_HANDLE hCryptPro 0, (void **)&exportFunc, &hFunc); } if (!exportFunc) - exportFunc = CRYPT_ExportRsaPublicKeyInfoEx; + exportFunc = CRYPT_ExportPublicKeyInfoEx; ret = exportFunc(hCryptProv, dwKeySpec, dwCertEncodingType, pszPublicKeyObjId, dwFlags, pvAuxInfo, pInfo, pcbInfo); if (hFunc)
-
Dmitry Timoshkov