[Rpm-maint] [rpm-software-management/rpm] Add OpenSSL crypto backend (#129)

[Stephen Gallagher]

sgallagher commented on this pull request.



> +}
+
+int rpmDigestFinal(DIGEST_CTX ctx, void ** datap, size_t *lenp, int asAscii)
+{
+    int ret;
+    unsigned char *digest = NULL;
+    unsigned int digestlen;
+
+    if (ctx == NULL) return -1;
+
+    digestlen = EVP_MD_CTX_size(ctx->md_ctx);
+    digest = xcalloc(digestlen, sizeof(*digest));
+    if (digest == NULL) return -1;
+
+    ret = EVP_DigestFinal_ex(ctx->md_ctx, digest, &digestlen);
+    if (ret != 1) goto done;

In this case, that would work, but there are many places in OpenSSL where success == 1 and any other value indicates an error. I kept it the same here for consistency.

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