Uninits in crypto-related code

_From [timurrrr@google.com](https://code.google.com/u/timurrrr@google.com/) on May 24, 2011 06:18:59_

Repro:
#

#include

#include

#include

#pragma comment(lib, "crypt32.lib")
#pragma comment(lib, "advapi32.lib")

#define ABORT(msg) do { fprintf(stderr, "Error: %s\n", msg); return 1; } while (0)

int main() {
HCRYPTPROV provider;
if (!CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_AES, 0))
ABORT("CryptAcquireContext failed");

HCRYPTKEY key;
if (!CryptGenKey(provider, CALG_AES_256, CRYPT_EXPORTABLE, &key))
ABORT("CryptGenKey failed");

DWORD buffer_size = 0;
if (!CryptExportKey(key, 0, PLAINTEXTKEYBLOB, 0, NULL, &buffer_size))
ABORT("CryptExportKey-1 failed");

BYTE *buffer = new BYTE[buffer_size];
if (!buffer)
ABORT("Memory allocation failed");

if (!CryptExportKey(key, 0, PLAINTEXTKEYBLOB, 0, buffer, &buffer_size))
ABORT("CryptExportKey-2 failed");

// 12 = sizeof(BLOBheader) + 4 bytes for the length field
std::string str;
str.assign((char*)buffer+12, buffer_size-12);
printf("BLOB: `%s`\n", str.c_str());

delete [] buffer;
CryptDestroyKey(key);
CryptReleaseContext(provider, 0);

printf("PASS\n");
return 0;
}
#

WARNING: unhandled system call #0x1019
WARNING: unhandled system call #0x101e
WARNING: unhandled system call #0x102c
WARNING: unhandled system call #0x10c8
WARNING: unhandled system call #0x10dc
WARNING: unhandled system call #0x10f4
WARNING: unhandled system call #0x1101
WARNING: unhandled system call #0x1142
WARNING: unhandled system call #0x1143
WARNING: unhandled system call #0x1179
WARNING: unhandled system call #0x11b2
WARNING: unhandled system call #0x11e8

result in UNINIT reports on the printf line.

_Original issue: http://code.google.com/p/drmemory/issues/detail?id=412_