diff options
Diffstat (limited to 'crypto/ext4crypt/HashPassword.cpp')
| -rw-r--r-- | crypto/ext4crypt/HashPassword.cpp | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/crypto/ext4crypt/HashPassword.cpp b/crypto/ext4crypt/HashPassword.cpp index 817c984bd..07ecb1f7d 100644 --- a/crypto/ext4crypt/HashPassword.cpp +++ b/crypto/ext4crypt/HashPassword.cpp @@ -27,11 +27,13 @@ #include <string> #include <stdlib.h> #include <openssl/sha.h> +#include <openssl/hmac.h> #include "HashPassword.h" #define PASS_PADDING_SIZE 128 #define SHA512_HEX_SIZE SHA512_DIGEST_LENGTH * 2 +#define SHA256_HEX_SIZE SHA256_DIGEST_LENGTH * 2 void* PersonalizedHashBinary(const char* prefix, const char* key, const size_t key_size) { size_t size = PASS_PADDING_SIZE + key_size; @@ -78,6 +80,37 @@ std::string PersonalizedHash(const char* prefix, const std::string& Password) { return PersonalizedHash(prefix, Password.c_str(), Password.size()); } +std::string PersonalizedHashSP800(const char* label, const char* context, const char* key, const size_t key_size) { + HMAC_CTX ctx; + HMAC_CTX_init(&ctx); + HMAC_Init_ex(&ctx, key, key_size, EVP_sha256(), NULL); + unsigned int counter = 1; + endianswap(&counter); + HMAC_Update(&ctx, (const unsigned char*)&counter, 4); + HMAC_Update(&ctx, (const unsigned char*)label, strlen(label)); + const unsigned char divider = 0; + HMAC_Update(&ctx, ÷r, 1); + HMAC_Update(&ctx, (const unsigned char*)context, strlen(context)); + unsigned int contextDisambiguation = strlen(context) * 8; + endianswap(&contextDisambiguation); + HMAC_Update(&ctx, (const unsigned char*)&contextDisambiguation, 4); + unsigned int finalValue = 256; + endianswap(&finalValue); + HMAC_Update(&ctx, (const unsigned char*)&finalValue, 4); + + unsigned char output[SHA256_DIGEST_LENGTH]; + unsigned int out_size = 0; + HMAC_Final(&ctx, output, &out_size); + + int index = 0; + char hex_hash[SHA256_HEX_SIZE + 1]; + for(index = 0; index < SHA256_DIGEST_LENGTH; index++) + sprintf(hex_hash + (index * 2), "%02x", output[index]); + hex_hash[SHA256_HEX_SIZE] = 0; + std::string ret = hex_hash; + return ret; +} + std::string HashPassword(const std::string& Password) { const char* prefix = FBE_PERSONALIZATION; return PersonalizedHash(prefix, Password); |