diff options
author | Dr. Stephen Henson <steve@openssl.org> | 2013-07-17 14:05:19 +0100 |
---|---|---|
committer | Dr. Stephen Henson <steve@openssl.org> | 2013-07-17 21:45:00 +0100 |
commit | 97cf1f6c2854a3a955fd7dd3a1f113deba00c9ef (patch) | |
tree | 900ee64624393d5d9721059b2b62c22c2792190b /crypto/aes/aes_wrap.c | |
parent | 415ece73015a0e24ea934ecfb857d022952bb65b (diff) |
EVP support for wrapping algorithms.
Add support for key wrap algorithms via EVP interface.
Generalise AES wrap algorithm and add to modes, making existing
AES wrap algorithm a special case.
Move test code to evptests.txt
Diffstat (limited to 'crypto/aes/aes_wrap.c')
-rw-r--r-- | crypto/aes/aes_wrap.c | 195 |
1 files changed, 3 insertions, 192 deletions
diff --git a/crypto/aes/aes_wrap.c b/crypto/aes/aes_wrap.c index e2d73d37ce..b30df8883f 100644 --- a/crypto/aes/aes_wrap.c +++ b/crypto/aes/aes_wrap.c @@ -53,207 +53,18 @@ #include "cryptlib.h" #include <openssl/aes.h> -#include <openssl/bio.h> - -static const unsigned char default_iv[] = { - 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, 0xA6, -}; +#include <openssl/modes.h> int AES_wrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out, const unsigned char *in, unsigned int inlen) { - unsigned char *A, B[16], *R; - unsigned int i, j, t; - if ((inlen & 0x7) || (inlen < 8)) - return -1; - A = B; - t = 1; - memcpy(out + 8, in, inlen); - if (!iv) - iv = default_iv; - - memcpy(A, iv, 8); - - for (j = 0; j < 6; j++) - { - R = out + 8; - for (i = 0; i < inlen; i += 8, t++, R += 8) - { - memcpy(B + 8, R, 8); - AES_encrypt(B, B, key); - A[7] ^= (unsigned char)(t & 0xff); - if (t > 0xff) - { - A[6] ^= (unsigned char)((t >> 8) & 0xff); - A[5] ^= (unsigned char)((t >> 16) & 0xff); - A[4] ^= (unsigned char)((t >> 24) & 0xff); - } - memcpy(R, B + 8, 8); - } - } - memcpy(out, A, 8); - return inlen + 8; + return CRYPTO_128_wrap(key, iv, out, in, inlen, (block128_f)AES_encrypt); } int AES_unwrap_key(AES_KEY *key, const unsigned char *iv, unsigned char *out, const unsigned char *in, unsigned int inlen) { - unsigned char *A, B[16], *R; - unsigned int i, j, t; - inlen -= 8; - if (inlen & 0x7) - return -1; - if (inlen < 8) - return -1; - A = B; - t = 6 * (inlen >> 3); - memcpy(A, in, 8); - memcpy(out, in + 8, inlen); - for (j = 0; j < 6; j++) - { - R = out + inlen - 8; - for (i = 0; i < inlen; i += 8, t--, R -= 8) - { - A[7] ^= (unsigned char)(t & 0xff); - if (t > 0xff) - { - A[6] ^= (unsigned char)((t >> 8) & 0xff); - A[5] ^= (unsigned char)((t >> 16) & 0xff); - A[4] ^= (unsigned char)((t >> 24) & 0xff); - } - memcpy(B + 8, R, 8); - AES_decrypt(B, B, key); - memcpy(R, B + 8, 8); - } - } - if (!iv) - iv = default_iv; - if (memcmp(A, iv, 8)) - { - OPENSSL_cleanse(out, inlen); - return 0; - } - return inlen; - } - -#ifdef AES_WRAP_TEST - -int AES_wrap_unwrap_test(const unsigned char *kek, int keybits, - const unsigned char *iv, - const unsigned char *eout, - const unsigned char *key, int keylen) - { - unsigned char *otmp = NULL, *ptmp = NULL; - int r, ret = 0; - AES_KEY wctx; - otmp = OPENSSL_malloc(keylen + 8); - ptmp = OPENSSL_malloc(keylen); - if (!otmp || !ptmp) - return 0; - if (AES_set_encrypt_key(kek, keybits, &wctx)) - goto err; - r = AES_wrap_key(&wctx, iv, otmp, key, keylen); - if (r <= 0) - goto err; - - if (eout && memcmp(eout, otmp, keylen)) - goto err; - - if (AES_set_decrypt_key(kek, keybits, &wctx)) - goto err; - r = AES_unwrap_key(&wctx, iv, ptmp, otmp, r); - - if (memcmp(key, ptmp, keylen)) - goto err; - - ret = 1; - - err: - if (otmp) - OPENSSL_free(otmp); - if (ptmp) - OPENSSL_free(ptmp); - - return ret; - + return CRYPTO_128_unwrap(key, iv, out, in, inlen, (block128_f)AES_decrypt); } - - - -int main(int argc, char **argv) -{ - -static const unsigned char kek[] = { - 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, - 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, - 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, - 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f -}; - -static const unsigned char key[] = { - 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, - 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff, - 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, - 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f -}; - -static const unsigned char e1[] = { - 0x1f, 0xa6, 0x8b, 0x0a, 0x81, 0x12, 0xb4, 0x47, - 0xae, 0xf3, 0x4b, 0xd8, 0xfb, 0x5a, 0x7b, 0x82, - 0x9d, 0x3e, 0x86, 0x23, 0x71, 0xd2, 0xcf, 0xe5 -}; - -static const unsigned char e2[] = { - 0x96, 0x77, 0x8b, 0x25, 0xae, 0x6c, 0xa4, 0x35, - 0xf9, 0x2b, 0x5b, 0x97, 0xc0, 0x50, 0xae, 0xd2, - 0x46, 0x8a, 0xb8, 0xa1, 0x7a, 0xd8, 0x4e, 0x5d -}; - -static const unsigned char e3[] = { - 0x64, 0xe8, 0xc3, 0xf9, 0xce, 0x0f, 0x5b, 0xa2, - 0x63, 0xe9, 0x77, 0x79, 0x05, 0x81, 0x8a, 0x2a, - 0x93, 0xc8, 0x19, 0x1e, 0x7d, 0x6e, 0x8a, 0xe7 -}; - -static const unsigned char e4[] = { - 0x03, 0x1d, 0x33, 0x26, 0x4e, 0x15, 0xd3, 0x32, - 0x68, 0xf2, 0x4e, 0xc2, 0x60, 0x74, 0x3e, 0xdc, - 0xe1, 0xc6, 0xc7, 0xdd, 0xee, 0x72, 0x5a, 0x93, - 0x6b, 0xa8, 0x14, 0x91, 0x5c, 0x67, 0x62, 0xd2 -}; - -static const unsigned char e5[] = { - 0xa8, 0xf9, 0xbc, 0x16, 0x12, 0xc6, 0x8b, 0x3f, - 0xf6, 0xe6, 0xf4, 0xfb, 0xe3, 0x0e, 0x71, 0xe4, - 0x76, 0x9c, 0x8b, 0x80, 0xa3, 0x2c, 0xb8, 0x95, - 0x8c, 0xd5, 0xd1, 0x7d, 0x6b, 0x25, 0x4d, 0xa1 -}; - -static const unsigned char e6[] = { - 0x28, 0xc9, 0xf4, 0x04, 0xc4, 0xb8, 0x10, 0xf4, - 0xcb, 0xcc, 0xb3, 0x5c, 0xfb, 0x87, 0xf8, 0x26, - 0x3f, 0x57, 0x86, 0xe2, 0xd8, 0x0e, 0xd3, 0x26, - 0xcb, 0xc7, 0xf0, 0xe7, 0x1a, 0x99, 0xf4, 0x3b, - 0xfb, 0x98, 0x8b, 0x9b, 0x7a, 0x02, 0xdd, 0x21 -}; - - AES_KEY wctx, xctx; - int ret; - ret = AES_wrap_unwrap_test(kek, 128, NULL, e1, key, 16); - fprintf(stderr, "Key test result %d\n", ret); - ret = AES_wrap_unwrap_test(kek, 192, NULL, e2, key, 16); - fprintf(stderr, "Key test result %d\n", ret); - ret = AES_wrap_unwrap_test(kek, 256, NULL, e3, key, 16); - fprintf(stderr, "Key test result %d\n", ret); - ret = AES_wrap_unwrap_test(kek, 192, NULL, e4, key, 24); - fprintf(stderr, "Key test result %d\n", ret); - ret = AES_wrap_unwrap_test(kek, 256, NULL, e5, key, 24); - fprintf(stderr, "Key test result %d\n", ret); - ret = AES_wrap_unwrap_test(kek, 256, NULL, e6, key, 32); - fprintf(stderr, "Key test result %d\n", ret); -} - - -#endif |