version 1.20, 2000/03/22 09:55:10 |
version 1.21, 2000/03/28 20:24:49 |
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"3des", |
"3des", |
"tss", |
"tss", |
"rc4", |
"rc4", |
"blowfish" |
"blowfish", |
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"reserved", |
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"blowfish-cbc", |
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"3des-cbc", |
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"arcfour", |
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"cast128-cbc" |
}; |
}; |
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/* |
/* |
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unsigned int mask = 0; |
unsigned int mask = 0; |
mask |= 1 << SSH_CIPHER_3DES; /* Mandatory */ |
mask |= 1 << SSH_CIPHER_3DES; /* Mandatory */ |
mask |= 1 << SSH_CIPHER_BLOWFISH; |
mask |= 1 << SSH_CIPHER_BLOWFISH; |
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mask |= 1 << SSH_CIPHER_BLOWFISH_CBC; |
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mask |= 1 << SSH_CIPHER_3DES_CBC; |
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mask |= 1 << SSH_CIPHER_ARCFOUR; |
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mask |= 1 << SSH_CIPHER_CAST128_CBC; |
return mask; |
return mask; |
} |
} |
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break; |
break; |
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case SSH_CIPHER_BLOWFISH: |
case SSH_CIPHER_BLOWFISH: |
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if (keylen < 16) |
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error("Key length %d is insufficient for blowfish.", keylen); |
BF_set_key(&context->u.bf.key, keylen, padded); |
BF_set_key(&context->u.bf.key, keylen, padded); |
memset(context->u.bf.iv, 0, 8); |
memset(context->u.bf.iv, 0, 8); |
break; |
break; |
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case SSH_CIPHER_3DES_CBC: |
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case SSH_CIPHER_BLOWFISH_CBC: |
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case SSH_CIPHER_ARCFOUR: |
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case SSH_CIPHER_CAST128_CBC: |
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fatal("cipher_set_key: illegal cipher: %s", cipher_name(cipher)); |
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break; |
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default: |
default: |
fatal("cipher_set_key: unknown cipher: %s", cipher_name(cipher)); |
fatal("cipher_set_key: unknown cipher: %s", cipher_name(cipher)); |
} |
} |
memset(padded, 0, sizeof(padded)); |
memset(padded, 0, sizeof(padded)); |
} |
} |
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void |
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cipher_set_key_iv(CipherContext * context, int cipher, |
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const unsigned char *key, int keylen, |
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const unsigned char *iv, int ivlen) |
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{ |
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/* Set cipher type. */ |
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context->type = cipher; |
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/* Initialize the initialization vector. */ |
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switch (cipher) { |
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case SSH_CIPHER_NONE: |
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break; |
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case SSH_CIPHER_3DES: |
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case SSH_CIPHER_BLOWFISH: |
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fatal("cipher_set_key_iv: illegal cipher: %s", cipher_name(cipher)); |
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break; |
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case SSH_CIPHER_3DES_CBC: |
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if (keylen < 24) |
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error("Key length %d is insufficient for 3des-cbc.", keylen); |
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des_set_key((void *) key, context->u.des3.key1); |
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des_set_key((void *) (key+8), context->u.des3.key2); |
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des_set_key((void *) (key+16), context->u.des3.key3); |
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if (ivlen < 8) |
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error("IV length %d is insufficient for 3des-cbc.", ivlen); |
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memcpy(context->u.des3.iv3, (char *)iv, 8); |
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break; |
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case SSH_CIPHER_BLOWFISH_CBC: |
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if (keylen < 16) |
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error("Key length %d is insufficient for blowfish.", keylen); |
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if (ivlen < 8) |
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error("IV length %d is insufficient for blowfish.", ivlen); |
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BF_set_key(&context->u.bf.key, keylen, (unsigned char *)key); |
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memcpy(context->u.bf.iv, (char *)iv, 8); |
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break; |
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case SSH_CIPHER_ARCFOUR: |
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if (keylen < 16) |
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error("Key length %d is insufficient for arcfour.", keylen); |
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RC4_set_key(&context->u.rc4, keylen, (unsigned char *)key); |
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break; |
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case SSH_CIPHER_CAST128_CBC: |
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if (keylen < 16) |
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error("Key length %d is insufficient for cast128.", keylen); |
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if (ivlen < 8) |
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error("IV length %d is insufficient for cast128.", ivlen); |
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CAST_set_key(&context->u.cast.key, keylen, (unsigned char *) key); |
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memcpy(context->u.cast.iv, (char *)iv, 8); |
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break; |
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default: |
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fatal("cipher_set_key: unknown cipher: %s", cipher_name(cipher)); |
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} |
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} |
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/* Encrypts data using the cipher. */ |
/* Encrypts data using the cipher. */ |
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void |
void |
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swap_bytes(dest, dest, len); |
swap_bytes(dest, dest, len); |
break; |
break; |
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case SSH_CIPHER_BLOWFISH_CBC: |
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BF_cbc_encrypt((void *)src, dest, len, |
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&context->u.bf.key, context->u.bf.iv, |
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BF_ENCRYPT); |
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break; |
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case SSH_CIPHER_3DES_CBC: |
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des_ede3_cbc_encrypt(src, dest, len, |
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context->u.des3.key1, context->u.des3.key2, |
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context->u.des3.key3, &context->u.des3.iv3, DES_ENCRYPT); |
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break; |
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case SSH_CIPHER_ARCFOUR: |
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RC4(&context->u.rc4, len, (unsigned char *)src, dest); |
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break; |
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case SSH_CIPHER_CAST128_CBC: |
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CAST_cbc_encrypt(src, dest, len, |
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&context->u.cast.key, context->u.cast.iv, CAST_ENCRYPT); |
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break; |
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default: |
default: |
fatal("cipher_encrypt: unknown cipher: %s", cipher_name(context->type)); |
fatal("cipher_encrypt: unknown cipher: %s", cipher_name(context->type)); |
} |
} |
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&context->u.bf.key, context->u.bf.iv, |
&context->u.bf.key, context->u.bf.iv, |
BF_DECRYPT); |
BF_DECRYPT); |
swap_bytes(dest, dest, len); |
swap_bytes(dest, dest, len); |
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break; |
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case SSH_CIPHER_BLOWFISH_CBC: |
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BF_cbc_encrypt((void *) src, dest, len, |
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&context->u.bf.key, context->u.bf.iv, |
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BF_DECRYPT); |
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break; |
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case SSH_CIPHER_3DES_CBC: |
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des_ede3_cbc_encrypt(src, dest, len, |
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context->u.des3.key1, context->u.des3.key2, |
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context->u.des3.key3, &context->u.des3.iv3, DES_DECRYPT); |
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break; |
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case SSH_CIPHER_ARCFOUR: |
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RC4(&context->u.rc4, len, (unsigned char *)src, dest); |
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break; |
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case SSH_CIPHER_CAST128_CBC: |
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CAST_cbc_encrypt(src, dest, len, |
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&context->u.cast.key, context->u.cast.iv, CAST_DECRYPT); |
break; |
break; |
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default: |
default: |