about EVP_DigestInit_ex

[nicolas . kox]

Hello,

I'm a bit confused about the behavior of EVP_DigestInit_ex :

int EVP_DigestInit_ex(EVP_MD_CTX *ctx, const EVP_MD *type, ENGINE *impl)
        {
 if (type)
                {
        else
        if(!ctx->digest)
                {
                EVPerr(EVP_F_EVP_DIGESTINIT_EX,EVP_R_NO_DIGEST_SET);
                return 0;
                }
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