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core: protect precomputed block hashes with SHA256

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moneromooo-monero 2017-02-23 23:18:10 +00:00
parent d666339853
commit 583a7b5c74
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GPG key ID: 686F07454D6CEFC3
3 changed files with 41 additions and 1 deletions
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12
src/common/util.cpp
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@ -587,6 +587,18 @@ std::string get_nix_version_display_string()
return 0;
}
bool sha256sum(const uint8_t *data, size_t len, crypto::hash &hash)
{
SHA256_CTX ctx;
if (!SHA256_Init(&ctx))
return false;
if (!SHA256_Update(&ctx, data, len))
return false;
if (!SHA256_Final((unsigned char*)hash.data, &ctx))
return false;
return true;
}
bool sha256sum(const std::string &filename, crypto::hash &hash)
{
if (!epee::file_io_utils::is_file_exist(filename))

1
src/common/util.h
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@ -185,5 +185,6 @@ namespace tools
bool is_local_address(const std::string &address);
int vercmp(const char *v0, const char *v1); // returns < 0, 0, > 0, similar to strcmp, but more human friendly than lexical - does not attempt to validate
bool sha256sum(const uint8_t *data, size_t len, crypto::hash &hash);
bool sha256sum(const std::string &filename, crypto::hash &hash);
}