coco coco wrote:
Sorry if this is a dumb question, I'm not sure why EVP_SignInit_ext() is
giving me unhandled exception error. My code is a very simple testing code:
char * clearText = "testing openssl";
char cryptText[MAX_LEN];
char buf[MAX_LEN];
unsigned char ubuf[MAX_LEN];
unsigned char sig[MAX_LEN];
unsigned int sigLen;
EVP_PKEY key;
EVP_MD_CTX sctx, vctx;
int ret = EVP_PKEY_assign_RSA(&key, RSA_generate_key(1024, RSA_3, 0,
0));
if (ret != 1)
std::cout << "Generate rsa key failed..." << std::endl;
EVP_SignInit_ex(&sctx, EVP_sha1(), NULL);
EVP_SignUpdate(&sctx, clearText, strlen(clearText));
memset(sig, 0, MAX_LEN);
ret = EVP_SignFinal(&sctx, sig, &sigLen, &key);
if (ret != 1)
std::cout << "Signing failed..." << std::endl;
...
Everytime I get to EVP_SignInit_ex(), I get the error:
Unhandled exception at 0x1003dee6 in test.exe: 0xC0000005: Access
violation reading location 0xcccccccc.
try a EVP_MD_CTX_init() before using the EVP_MD_CTX objects
Nils
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