static VALUE
ossl_digest_copy(VALUE self, VALUE other)
{
EVP_MD_CTX *ctx1, *ctx2;
rb_check_frozen(self);
if (self == other) return self;
GetDigest(self, ctx1);
SafeGetDigest(other, ctx2);
if (!EVP_MD_CTX_copy(ctx1, ctx2)) {
ossl_raise(eDigestError, NULL);
}
return self;
}
void
GRecord::WriteTo(TextWriter &writer) const
{
char digest[DIGEST_LENGTH + 1];
GetDigest(digest);
static constexpr size_t chars_per_line = 16;
static_assert(DIGEST_LENGTH % chars_per_line == 0, "wrong digest length");
for (const char *i = digest, *end = digest + DIGEST_LENGTH;
i != end; i += chars_per_line) {
writer.Write('G');
writer.Write(i, chars_per_line);
writer.NewLine();
}
}
/*
* call-seq:
* Digest.new(string) -> digest
*
*/
static VALUE
ossl_digest_initialize(VALUE self, SEL sel, int argc, VALUE *argv)
{
EVP_MD_CTX *ctx;
const EVP_MD *md;
VALUE type, data;
rb_scan_args(argc, argv, "11", &type, &data);
md = GetDigestPtr(type);
if (!NIL_P(data)) StringValue(data);
GetDigest(self, ctx);
EVP_DigestInit_ex(ctx, md, NULL);
if (!NIL_P(data)) return ossl_digest_update(self, 0, data);
return self;
}
/*
* call-seq:
* Digest.new(string [, data]) -> Digest
*
* Creates a Digest instance based on +string+, which is either the ln
* (long name) or sn (short name) of a supported digest algorithm.
* If +data+ (a +String+) is given, it is used as the initial input to the
* Digest instance, i.e.
* digest = OpenSSL::Digest.new('sha256', 'digestdata')
* is equal to
* digest = OpenSSL::Digest.new('sha256')
* digest.update('digestdata')
*
* === Example
* digest = OpenSSL::Digest.new('sha1')
*
*
*/
static VALUE
ossl_digest_initialize(int argc, VALUE *argv, VALUE self)
{
EVP_MD_CTX *ctx;
const EVP_MD *md;
VALUE type, data;
rb_scan_args(argc, argv, "11", &type, &data);
md = GetDigestPtr(type);
if (!NIL_P(data)) StringValue(data);
GetDigest(self, ctx);
if (EVP_DigestInit_ex(ctx, md, NULL) != 1) {
ossl_raise(eDigestError, "Digest initialization failed.");
}
if (!NIL_P(data)) return ossl_digest_update(self, data);
return self;
}
bool
GRecord::VerifyGRecordInFile(const TCHAR *path)
{
// assumes FileName member is set
// Load File into Buffer (assume name is already set)
LoadFileToBuffer(path);
// load Existing Digest "old"
char old_g_record[DIGEST_LENGTH + 1];
if (!ReadGRecordFromFile(path, old_g_record, ARRAY_SIZE(old_g_record)))
return false;
// recalculate digest from buffer
FinalizeBuffer();
char new_g_record[DIGEST_LENGTH + 1];
GetDigest(new_g_record);
return strcmp(old_g_record, new_g_record) == 0;
}
bool
GRecord::VerifyGRecordInFile()
{
// assumes FileName member is set
// Load File into Buffer (assume name is already set)
LoadFileToBuffer();
// load Existing Digest "old"
char old_g_record[BUFF_LEN];
if (!ReadGRecordFromFile(old_g_record, BUFF_LEN))
return false;
// recalculate digest from buffer
FinalizeBuffer();
char new_g_record[BUFF_LEN];
GetDigest(new_g_record);
return strcmp(old_g_record, new_g_record) == 0;
}
/*
* call-seq:
* digest.finish -> aString
*
*/
static VALUE
ossl_digest_finish(int argc, VALUE *argv, VALUE self)
{
EVP_MD_CTX *ctx;
VALUE str;
rb_scan_args(argc, argv, "01", &str);
GetDigest(self, ctx);
if (NIL_P(str)) {
str = rb_str_new(NULL, EVP_MD_CTX_size(ctx));
} else {
StringValue(str);
rb_str_resize(str, EVP_MD_CTX_size(ctx));
}
EVP_DigestFinal_ex(ctx, (unsigned char *)RSTRING_PTR(str), NULL);
return str;
}
/*
* call-seq:
* digest.finish -> aString
*
*/
static VALUE
ossl_digest_finish(VALUE self, SEL sel, int argc, VALUE *argv)
{
EVP_MD_CTX *ctx;
VALUE str;
rb_scan_args(argc, argv, "01", &str);
GetDigest(self, ctx);
if (NIL_P(str)) {
str = rb_bstr_new();
}
else {
StringValue(str);
str = rb_str_bstr(str);
}
rb_bstr_resize(str, EVP_MD_CTX_size(ctx));
EVP_DigestFinal_ex(ctx, rb_bstr_bytes(str), NULL);
return str;
}
/*
* call-seq:
* Digest.new(string) -> digest
*
*/
static VALUE
ossl_digest_initialize(int argc, VALUE *argv, VALUE self)
{
EVP_MD_CTX *ctx;
const EVP_MD *md;
char *name;
VALUE type, data;
rb_scan_args(argc, argv, "11", &type, &data);
StringValue(type);
if (!NIL_P(data)) StringValue(data);
name = StringValuePtr(type);
md = EVP_get_digestbyname(name);
if (!md) {
ossl_raise(rb_eRuntimeError, "Unsupported digest algorithm (%s).", name);
}
GetDigest(self, ctx);
EVP_DigestInit_ex(ctx, md, NULL);
if (!NIL_P(data)) return ossl_digest_update(self, data);
return self;
}
