diff options
Diffstat (limited to 'libbutl/sha256.mxx')
| -rw-r--r-- | libbutl/sha256.mxx | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/libbutl/sha256.mxx b/libbutl/sha256.mxx index 23a116a..1584be8 100644 --- a/libbutl/sha256.mxx +++ b/libbutl/sha256.mxx @@ -111,6 +111,12 @@ LIBBUTL_MODEXPORT namespace butl const char* string () const; + std::string + abbreviated_string (std::size_t n) const + { + return std::string (string (), n < 64 ? n : 64); + } + private: struct context // Note: identical to SHA256_CTX. { @@ -137,10 +143,10 @@ LIBBUTL_MODEXPORT namespace butl LIBBUTL_SYMEXPORT std::string sha256_to_fingerprint (const std::string&); - // Convert a fingerprint (32 colon-separated hex digit pairs) to the SHA256 - // string representation (64 lower case hex digits). Throw invalid_argument - // if the argument is not a valid fingerprint. + // Convert a fingerprint (32 colon-separated hex digit pairs) to the possibly + // abbreviated SHA256 string representation (up to 64 lower case hex digits). + // Throw invalid_argument if the first argument is not a valid fingerprint. // LIBBUTL_SYMEXPORT std::string - fingerprint_to_sha256 (const std::string&); + fingerprint_to_sha256 (const std::string&, std::size_t = 64); } |