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Bug 1371303 - Add "digest" command to NSS tool r=ttaubert
Differential Revision: https://nss-review.dev.mozaws.net/D253
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Original file line number | Diff line number | Diff line change |
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/* This Source Code Form is subject to the terms of the Mozilla Public | ||
* License, v. 2.0. If a copy of the MPL was not distributed with this | ||
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | ||
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#include "digesttool.h" | ||
#include "argparse.h" | ||
#include "scoped_ptrs.h" | ||
#include "util.h" | ||
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#include <algorithm> | ||
#include <fstream> | ||
#include <iomanip> | ||
#include <iostream> | ||
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#include <hasht.h> // contains supported digest types | ||
#include <nss.h> | ||
#include <pk11pub.h> | ||
#include <prio.h> | ||
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static SECOidData* HashTypeToOID(HASH_HashType hashtype) { | ||
SECOidTag hashtag; | ||
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if (hashtype <= HASH_AlgNULL || hashtype >= HASH_AlgTOTAL) { | ||
return nullptr; | ||
} | ||
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switch (hashtype) { | ||
case HASH_AlgMD5: | ||
hashtag = SEC_OID_MD5; | ||
break; | ||
case HASH_AlgSHA1: | ||
hashtag = SEC_OID_SHA1; | ||
break; | ||
case HASH_AlgSHA224: | ||
hashtag = SEC_OID_SHA224; | ||
break; | ||
case HASH_AlgSHA256: | ||
hashtag = SEC_OID_SHA256; | ||
break; | ||
case HASH_AlgSHA384: | ||
hashtag = SEC_OID_SHA384; | ||
break; | ||
case HASH_AlgSHA512: | ||
hashtag = SEC_OID_SHA512; | ||
break; | ||
default: | ||
return nullptr; | ||
} | ||
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return SECOID_FindOIDByTag(hashtag); | ||
} | ||
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static SECOidData* HashNameToOID(const std::string& hashName) { | ||
for (size_t htype = HASH_AlgNULL + 1; htype < HASH_AlgTOTAL; htype++) { | ||
SECOidData* hashOID = HashTypeToOID(static_cast<HASH_HashType>(htype)); | ||
if (hashOID && std::string(hashOID->desc) == hashName) { | ||
return hashOID; | ||
} | ||
} | ||
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return nullptr; | ||
} | ||
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static bool Digest(const ArgParser& parser, SECOidData* hashOID); | ||
static bool ComputeDigest(std::istream& is, ScopedPK11Context& hashCtx); | ||
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bool DigestTool::Run(const std::vector<std::string>& arguments) { | ||
ArgParser parser(arguments); | ||
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if (parser.GetPositionalArgumentCount() != 1) { | ||
Usage(); | ||
return false; | ||
} | ||
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// no need for a db for the digest tool | ||
SECStatus rv = NSS_NoDB_Init("."); | ||
if (rv != SECSuccess) { | ||
std::cerr << "NSS init failed!" << std::endl; | ||
return false; | ||
} | ||
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std::string hashName = parser.GetPositionalArgument(0); | ||
std::transform(hashName.begin(), hashName.end(), hashName.begin(), ::toupper); | ||
SECOidData* hashOID = HashNameToOID(hashName); | ||
if (hashOID == nullptr) { | ||
std::cerr << "Error: Unknown digest type " | ||
<< parser.GetPositionalArgument(0) << "." << std::endl; | ||
return false; | ||
} | ||
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bool ret = Digest(parser, hashOID); | ||
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// shutdown nss | ||
if (NSS_Shutdown() != SECSuccess) { | ||
std::cerr << "NSS Shutdown failed!" << std::endl; | ||
return false; | ||
} | ||
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return ret; | ||
} | ||
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void DigestTool::Usage() { | ||
std::cerr << "Usage: nss digest md5|sha-1|sha-224|sha-256|sha-384|sha-512 " | ||
"[--infile <path>]" | ||
<< std::endl; | ||
} | ||
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static bool Digest(const ArgParser& parser, SECOidData* hashOID) { | ||
std::string inputFile; | ||
if (parser.Has("--infile")) { | ||
inputFile = parser.Get("--infile"); | ||
} | ||
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ScopedPK11Context hashCtx(PK11_CreateDigestContext(hashOID->offset)); | ||
if (hashCtx == nullptr) { | ||
std::cerr << "Creating digest context failed." << std::endl; | ||
return false; | ||
} | ||
PK11_DigestBegin(hashCtx.get()); | ||
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std::ifstream fis; | ||
std::istream& is = GetStreamFromFileOrStdin(inputFile, fis); | ||
if (!is.good() || !ComputeDigest(is, hashCtx)) { | ||
return false; | ||
} | ||
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unsigned char digest[HASH_LENGTH_MAX]; | ||
unsigned int len; | ||
SECStatus rv = PK11_DigestFinal(hashCtx.get(), digest, &len, HASH_LENGTH_MAX); | ||
if (rv != SECSuccess || len == 0) { | ||
std::cerr << "Calculating final hash value failed." << std::endl; | ||
return false; | ||
} | ||
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// human readable output | ||
for (size_t i = 0; i < len; i++) { | ||
std::cout << std::setw(2) << std::setfill('0') << std::hex | ||
<< static_cast<int>(digest[i]); | ||
} | ||
std::cout << std::endl; | ||
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return true; | ||
} | ||
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static bool ComputeDigest(std::istream& is, ScopedPK11Context& hashCtx) { | ||
while (is) { | ||
unsigned char buf[4096]; | ||
is.read(reinterpret_cast<char*>(buf), sizeof(buf)); | ||
if (is.fail() && !is.eof()) { | ||
std::cerr << "Error reading from input stream." << std::endl; | ||
return false; | ||
} | ||
SECStatus rv = PK11_DigestOp(hashCtx.get(), buf, is.gcount()); | ||
if (rv != SECSuccess) { | ||
std::cerr << "PK11_DigestOp failed." << std::endl; | ||
return false; | ||
} | ||
} | ||
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return true; | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,20 @@ | ||
/* This Source Code Form is subject to the terms of the Mozilla Public | ||
* License, v. 2.0. If a copy of the MPL was not distributed with this | ||
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | ||
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#ifndef digest_tool_h__ | ||
#define digest_tool_h__ | ||
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#include <string> | ||
#include <vector> | ||
#include "tool.h" | ||
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class DigestTool : public Tool { | ||
public: | ||
bool Run(const std::vector<std::string>& arguments) override; | ||
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private: | ||
void Usage() override; | ||
}; | ||
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#endif // digest_tool_h__ |
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