diff options
Diffstat (limited to 'openssl/crypto/evp/e_aes.c')
| -rw-r--r-- | openssl/crypto/evp/e_aes.c | 1273 |
1 files changed, 1233 insertions, 40 deletions
diff --git a/openssl/crypto/evp/e_aes.c b/openssl/crypto/evp/e_aes.c index bd6c0a3a6..1e4af0cb7 100644 --- a/openssl/crypto/evp/e_aes.c +++ b/openssl/crypto/evp/e_aes.c @@ -1,5 +1,5 @@ /* ==================================================================== - * Copyright (c) 2001 The OpenSSL Project. All rights reserved. + * Copyright (c) 2001-2011 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -56,57 +56,511 @@ #include <assert.h> #include <openssl/aes.h> #include "evp_locl.h" - -static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, - const unsigned char *iv, int enc); +#ifndef OPENSSL_FIPS +#include "modes_lcl.h" +#include <openssl/rand.h> typedef struct { AES_KEY ks; + block128_f block; + union { + cbc128_f cbc; + ctr128_f ctr; + } stream; } EVP_AES_KEY; -#define data(ctx) EVP_C_DATA(EVP_AES_KEY,ctx) - -IMPLEMENT_BLOCK_CIPHER(aes_128, ks, AES, EVP_AES_KEY, - NID_aes_128, 16, 16, 16, 128, - 0, aes_init_key, NULL, - EVP_CIPHER_set_asn1_iv, - EVP_CIPHER_get_asn1_iv, - NULL) -IMPLEMENT_BLOCK_CIPHER(aes_192, ks, AES, EVP_AES_KEY, - NID_aes_192, 16, 24, 16, 128, - 0, aes_init_key, NULL, - EVP_CIPHER_set_asn1_iv, - EVP_CIPHER_get_asn1_iv, - NULL) -IMPLEMENT_BLOCK_CIPHER(aes_256, ks, AES, EVP_AES_KEY, - NID_aes_256, 16, 32, 16, 128, - 0, aes_init_key, NULL, - EVP_CIPHER_set_asn1_iv, - EVP_CIPHER_get_asn1_iv, - NULL) - -#define IMPLEMENT_AES_CFBR(ksize,cbits) IMPLEMENT_CFBR(aes,AES,EVP_AES_KEY,ks,ksize,cbits,16) - -IMPLEMENT_AES_CFBR(128,1) -IMPLEMENT_AES_CFBR(192,1) -IMPLEMENT_AES_CFBR(256,1) - -IMPLEMENT_AES_CFBR(128,8) -IMPLEMENT_AES_CFBR(192,8) -IMPLEMENT_AES_CFBR(256,8) +typedef struct + { + AES_KEY ks; /* AES key schedule to use */ + int key_set; /* Set if key initialised */ + int iv_set; /* Set if an iv is set */ + GCM128_CONTEXT gcm; + unsigned char *iv; /* Temporary IV store */ + int ivlen; /* IV length */ + int taglen; + int iv_gen; /* It is OK to generate IVs */ + int tls_aad_len; /* TLS AAD length */ + ctr128_f ctr; + } EVP_AES_GCM_CTX; + +typedef struct + { + AES_KEY ks1, ks2; /* AES key schedules to use */ + XTS128_CONTEXT xts; + void (*stream)(const unsigned char *in, + unsigned char *out, size_t length, + const AES_KEY *key1, const AES_KEY *key2, + const unsigned char iv[16]); + } EVP_AES_XTS_CTX; + +typedef struct + { + AES_KEY ks; /* AES key schedule to use */ + int key_set; /* Set if key initialised */ + int iv_set; /* Set if an iv is set */ + int tag_set; /* Set if tag is valid */ + int len_set; /* Set if message length set */ + int L, M; /* L and M parameters from RFC3610 */ + CCM128_CONTEXT ccm; + ccm128_f str; + } EVP_AES_CCM_CTX; + +#define MAXBITCHUNK ((size_t)1<<(sizeof(size_t)*8-4)) + +#ifdef VPAES_ASM +int vpaes_set_encrypt_key(const unsigned char *userKey, int bits, + AES_KEY *key); +int vpaes_set_decrypt_key(const unsigned char *userKey, int bits, + AES_KEY *key); + +void vpaes_encrypt(const unsigned char *in, unsigned char *out, + const AES_KEY *key); +void vpaes_decrypt(const unsigned char *in, unsigned char *out, + const AES_KEY *key); + +void vpaes_cbc_encrypt(const unsigned char *in, + unsigned char *out, + size_t length, + const AES_KEY *key, + unsigned char *ivec, int enc); +#endif +#ifdef BSAES_ASM +void bsaes_cbc_encrypt(const unsigned char *in, unsigned char *out, + size_t length, const AES_KEY *key, + unsigned char ivec[16], int enc); +void bsaes_ctr32_encrypt_blocks(const unsigned char *in, unsigned char *out, + size_t len, const AES_KEY *key, + const unsigned char ivec[16]); +void bsaes_xts_encrypt(const unsigned char *inp, unsigned char *out, + size_t len, const AES_KEY *key1, + const AES_KEY *key2, const unsigned char iv[16]); +void bsaes_xts_decrypt(const unsigned char *inp, unsigned char *out, + size_t len, const AES_KEY *key1, + const AES_KEY *key2, const unsigned char iv[16]); +#endif +#ifdef AES_CTR_ASM +void AES_ctr32_encrypt(const unsigned char *in, unsigned char *out, + size_t blocks, const AES_KEY *key, + const unsigned char ivec[AES_BLOCK_SIZE]); +#endif +#ifdef AES_XTS_ASM +void AES_xts_encrypt(const char *inp,char *out,size_t len, + const AES_KEY *key1, const AES_KEY *key2, + const unsigned char iv[16]); +void AES_xts_decrypt(const char *inp,char *out,size_t len, + const AES_KEY *key1, const AES_KEY *key2, + const unsigned char iv[16]); +#endif + +#if defined(AES_ASM) && !defined(I386_ONLY) && ( \ + ((defined(__i386) || defined(__i386__) || \ + defined(_M_IX86)) && defined(OPENSSL_IA32_SSE2))|| \ + defined(__x86_64) || defined(__x86_64__) || \ + defined(_M_AMD64) || defined(_M_X64) || \ + defined(__INTEL__) ) + +extern unsigned int OPENSSL_ia32cap_P[2]; + +#ifdef VPAES_ASM +#define VPAES_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(41-32))) +#endif +#ifdef BSAES_ASM +#define BSAES_CAPABLE VPAES_CAPABLE +#endif +/* + * AES-NI section + */ +#define AESNI_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(57-32))) + +int aesni_set_encrypt_key(const unsigned char *userKey, int bits, + AES_KEY *key); +int aesni_set_decrypt_key(const unsigned char *userKey, int bits, + AES_KEY *key); + +void aesni_encrypt(const unsigned char *in, unsigned char *out, + const AES_KEY *key); +void aesni_decrypt(const unsigned char *in, unsigned char *out, + const AES_KEY *key); + +void aesni_ecb_encrypt(const unsigned char *in, + unsigned char *out, + size_t length, + const AES_KEY *key, + int enc); +void aesni_cbc_encrypt(const unsigned char *in, + unsigned char *out, + size_t length, + const AES_KEY *key, + unsigned char *ivec, int enc); + +void aesni_ctr32_encrypt_blocks(const unsigned char *in, + unsigned char *out, + size_t blocks, + const void *key, + const unsigned char *ivec); + +void aesni_xts_encrypt(const unsigned char *in, + unsigned char *out, + size_t length, + const AES_KEY *key1, const AES_KEY *key2, + const unsigned char iv[16]); + +void aesni_xts_decrypt(const unsigned char *in, + unsigned char *out, + size_t length, + const AES_KEY *key1, const AES_KEY *key2, + const unsigned char iv[16]); + +void aesni_ccm64_encrypt_blocks (const unsigned char *in, + unsigned char *out, + size_t blocks, + const void *key, + const unsigned char ivec[16], + unsigned char cmac[16]); + +void aesni_ccm64_decrypt_blocks (const unsigned char *in, + unsigned char *out, + size_t blocks, + const void *key, + const unsigned char ivec[16], + unsigned char cmac[16]); + +static int aesni_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + int ret, mode; + EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; + + mode = ctx->cipher->flags & EVP_CIPH_MODE; + if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) + && !enc) + { + ret = aesni_set_decrypt_key(key, ctx->key_len*8, ctx->cipher_data); + dat->block = (block128_f)aesni_decrypt; + dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? + (cbc128_f)aesni_cbc_encrypt : + NULL; + } + else { + ret = aesni_set_encrypt_key(key, ctx->key_len*8, ctx->cipher_data); + dat->block = (block128_f)aesni_encrypt; + if (mode==EVP_CIPH_CBC_MODE) + dat->stream.cbc = (cbc128_f)aesni_cbc_encrypt; + else if (mode==EVP_CIPH_CTR_MODE) + dat->stream.ctr = (ctr128_f)aesni_ctr32_encrypt_blocks; + else + dat->stream.cbc = NULL; + } + + if(ret < 0) + { + EVPerr(EVP_F_AESNI_INIT_KEY,EVP_R_AES_KEY_SETUP_FAILED); + return 0; + } + + return 1; + } + +static int aesni_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in, size_t len) +{ + aesni_cbc_encrypt(in,out,len,ctx->cipher_data,ctx->iv,ctx->encrypt); + + return 1; +} + +static int aesni_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in, size_t len) +{ + size_t bl = ctx->cipher->block_size; + + if (len<bl) return 1; + + aesni_ecb_encrypt(in,out,len,ctx->cipher_data,ctx->encrypt); + + return 1; +} + +#define aesni_ofb_cipher aes_ofb_cipher +static int aesni_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in,size_t len); + +#define aesni_cfb_cipher aes_cfb_cipher +static int aesni_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in,size_t len); + +#define aesni_cfb8_cipher aes_cfb8_cipher +static int aesni_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in,size_t len); + +#define aesni_cfb1_cipher aes_cfb1_cipher +static int aesni_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in,size_t len); + +#define aesni_ctr_cipher aes_ctr_cipher +static int aesni_ctr_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); + +static int aesni_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + EVP_AES_GCM_CTX *gctx = ctx->cipher_data; + if (!iv && !key) + return 1; + if (key) + { + aesni_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); + CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, + (block128_f)aesni_encrypt); + gctx->ctr = (ctr128_f)aesni_ctr32_encrypt_blocks; + /* If we have an iv can set it directly, otherwise use + * saved IV. + */ + if (iv == NULL && gctx->iv_set) + iv = gctx->iv; + if (iv) + { + CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); + gctx->iv_set = 1; + } + gctx->key_set = 1; + } + else + { + /* If key set use IV, otherwise copy */ + if (gctx->key_set) + CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); + else + memcpy(gctx->iv, iv, gctx->ivlen); + gctx->iv_set = 1; + gctx->iv_gen = 0; + } + return 1; + } + +#define aesni_gcm_cipher aes_gcm_cipher +static int aesni_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); + +static int aesni_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + EVP_AES_XTS_CTX *xctx = ctx->cipher_data; + if (!iv && !key) + return 1; + + if (key) + { + /* key_len is two AES keys */ + if (enc) + { + aesni_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); + xctx->xts.block1 = (block128_f)aesni_encrypt; + xctx->stream = aesni_xts_encrypt; + } + else + { + aesni_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); + xctx->xts.block1 = (block128_f)aesni_decrypt; + xctx->stream = aesni_xts_decrypt; + } + + aesni_set_encrypt_key(key + ctx->key_len/2, + ctx->key_len * 4, &xctx->ks2); + xctx->xts.block2 = (block128_f)aesni_encrypt; + + xctx->xts.key1 = &xctx->ks1; + } + + if (iv) + { + xctx->xts.key2 = &xctx->ks2; + memcpy(ctx->iv, iv, 16); + } + + return 1; + } + +#define aesni_xts_cipher aes_xts_cipher +static int aesni_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); + +static int aesni_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + EVP_AES_CCM_CTX *cctx = ctx->cipher_data; + if (!iv && !key) + return 1; + if (key) + { + aesni_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); + CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, + &cctx->ks, (block128_f)aesni_encrypt); + cctx->str = enc?(ccm128_f)aesni_ccm64_encrypt_blocks : + (ccm128_f)aesni_ccm64_decrypt_blocks; + cctx->key_set = 1; + } + if (iv) + { + memcpy(ctx->iv, iv, 15 - cctx->L); + cctx->iv_set = 1; + } + return 1; + } + +#define aesni_ccm_cipher aes_ccm_cipher +static int aesni_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len); + +#define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ +static const EVP_CIPHER aesni_##keylen##_##mode = { \ + nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aesni_init_key, \ + aesni_##mode##_cipher, \ + NULL, \ + sizeof(EVP_AES_KEY), \ + NULL,NULL,NULL,NULL }; \ +static const EVP_CIPHER aes_##keylen##_##mode = { \ + nid##_##keylen##_##nmode,blocksize, \ + keylen/8,ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aes_init_key, \ + aes_##mode##_cipher, \ + NULL, \ + sizeof(EVP_AES_KEY), \ + NULL,NULL,NULL,NULL }; \ +const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ +{ return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; } + +#define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ +static const EVP_CIPHER aesni_##keylen##_##mode = { \ + nid##_##keylen##_##mode,blocksize, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aesni_##mode##_init_key, \ + aesni_##mode##_cipher, \ + aes_##mode##_cleanup, \ + sizeof(EVP_AES_##MODE##_CTX), \ + NULL,NULL,aes_##mode##_ctrl,NULL }; \ +static const EVP_CIPHER aes_##keylen##_##mode = { \ + nid##_##keylen##_##mode,blocksize, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aes_##mode##_init_key, \ + aes_##mode##_cipher, \ + aes_##mode##_cleanup, \ + sizeof(EVP_AES_##MODE##_CTX), \ + NULL,NULL,aes_##mode##_ctrl,NULL }; \ +const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ +{ return AESNI_CAPABLE?&aesni_##keylen##_##mode:&aes_##keylen##_##mode; } + +#else + +#define BLOCK_CIPHER_generic(nid,keylen,blocksize,ivlen,nmode,mode,MODE,flags) \ +static const EVP_CIPHER aes_##keylen##_##mode = { \ + nid##_##keylen##_##nmode,blocksize,keylen/8,ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aes_init_key, \ + aes_##mode##_cipher, \ + NULL, \ + sizeof(EVP_AES_KEY), \ + NULL,NULL,NULL,NULL }; \ +const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ +{ return &aes_##keylen##_##mode; } + +#define BLOCK_CIPHER_custom(nid,keylen,blocksize,ivlen,mode,MODE,flags) \ +static const EVP_CIPHER aes_##keylen##_##mode = { \ + nid##_##keylen##_##mode,blocksize, \ + (EVP_CIPH_##MODE##_MODE==EVP_CIPH_XTS_MODE?2:1)*keylen/8, ivlen, \ + flags|EVP_CIPH_##MODE##_MODE, \ + aes_##mode##_init_key, \ + aes_##mode##_cipher, \ + aes_##mode##_cleanup, \ + sizeof(EVP_AES_##MODE##_CTX), \ + NULL,NULL,aes_##mode##_ctrl,NULL }; \ +const EVP_CIPHER *EVP_aes_##keylen##_##mode(void) \ +{ return &aes_##keylen##_##mode; } +#endif + +#define BLOCK_CIPHER_generic_pack(nid,keylen,flags) \ + BLOCK_CIPHER_generic(nid,keylen,16,16,cbc,cbc,CBC,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ + BLOCK_CIPHER_generic(nid,keylen,16,0,ecb,ecb,ECB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ + BLOCK_CIPHER_generic(nid,keylen,1,16,ofb128,ofb,OFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ + BLOCK_CIPHER_generic(nid,keylen,1,16,cfb128,cfb,CFB,flags|EVP_CIPH_FLAG_DEFAULT_ASN1) \ + BLOCK_CIPHER_generic(nid,keylen,1,16,cfb1,cfb1,CFB,flags) \ + BLOCK_CIPHER_generic(nid,keylen,1,16,cfb8,cfb8,CFB,flags) \ + BLOCK_CIPHER_generic(nid,keylen,1,16,ctr,ctr,CTR,flags) static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, const unsigned char *iv, int enc) { - int ret; + int ret, mode; + EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; - if ((ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_CFB_MODE - || (ctx->cipher->flags & EVP_CIPH_MODE) == EVP_CIPH_OFB_MODE - || enc) - ret=AES_set_encrypt_key(key, ctx->key_len * 8, ctx->cipher_data); + mode = ctx->cipher->flags & EVP_CIPH_MODE; + if ((mode == EVP_CIPH_ECB_MODE || mode == EVP_CIPH_CBC_MODE) + && !enc) +#ifdef BSAES_CAPABLE + if (BSAES_CAPABLE && mode==EVP_CIPH_CBC_MODE) + { + ret = AES_set_decrypt_key(key,ctx->key_len*8,&dat->ks); + dat->block = (block128_f)AES_decrypt; + dat->stream.cbc = (cbc128_f)bsaes_cbc_encrypt; + } + else +#endif +#ifdef VPAES_CAPABLE + if (VPAES_CAPABLE) + { + ret = vpaes_set_decrypt_key(key,ctx->key_len*8,&dat->ks); + dat->block = (block128_f)vpaes_decrypt; + dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? + (cbc128_f)vpaes_cbc_encrypt : + NULL; + } + else +#endif + { + ret = AES_set_decrypt_key(key,ctx->key_len*8,&dat->ks); + dat->block = (block128_f)AES_decrypt; + dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? + (cbc128_f)AES_cbc_encrypt : + NULL; + } else - ret=AES_set_decrypt_key(key, ctx->key_len * 8, ctx->cipher_data); +#ifdef BSAES_CAPABLE + if (BSAES_CAPABLE && mode==EVP_CIPH_CTR_MODE) + { + ret = AES_set_encrypt_key(key,ctx->key_len*8,&dat->ks); + dat->block = (block128_f)AES_encrypt; + dat->stream.ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks; + } + else +#endif +#ifdef VPAES_CAPABLE + if (VPAES_CAPABLE) + { + ret = vpaes_set_encrypt_key(key,ctx->key_len*8,&dat->ks); + dat->block = (block128_f)vpaes_encrypt; + dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? + (cbc128_f)vpaes_cbc_encrypt : + NULL; + } + else +#endif + { + ret = AES_set_encrypt_key(key,ctx->key_len*8,&dat->ks); + dat->block = (block128_f)AES_encrypt; + dat->stream.cbc = mode==EVP_CIPH_CBC_MODE ? + (cbc128_f)AES_cbc_encrypt : + NULL; +#ifdef AES_CTR_ASM + if (mode==EVP_CIPH_CTR_MODE) + dat->stream.ctr = (ctr128_f)AES_ctr32_encrypt; +#endif + } if(ret < 0) { @@ -117,4 +571,743 @@ static int aes_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, return 1; } +static int aes_cbc_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in, size_t len) +{ + EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; + + if (dat->stream.cbc) + (*dat->stream.cbc)(in,out,len,&dat->ks,ctx->iv,ctx->encrypt); + else if (ctx->encrypt) + CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block); + else + CRYPTO_cbc128_encrypt(in,out,len,&dat->ks,ctx->iv,dat->block); + + return 1; +} + +static int aes_ecb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in, size_t len) +{ + size_t bl = ctx->cipher->block_size; + size_t i; + EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; + + if (len<bl) return 1; + + for (i=0,len-=bl;i<=len;i+=bl) + (*dat->block)(in+i,out+i,&dat->ks); + + return 1; +} + +static int aes_ofb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in,size_t len) +{ + EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; + + CRYPTO_ofb128_encrypt(in,out,len,&dat->ks, + ctx->iv,&ctx->num,dat->block); + return 1; +} + +static int aes_cfb_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in,size_t len) +{ + EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; + + CRYPTO_cfb128_encrypt(in,out,len,&dat->ks, + ctx->iv,&ctx->num,ctx->encrypt,dat->block); + return 1; +} + +static int aes_cfb8_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in,size_t len) +{ + EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; + + CRYPTO_cfb128_8_encrypt(in,out,len,&dat->ks, + ctx->iv,&ctx->num,ctx->encrypt,dat->block); + return 1; +} + +static int aes_cfb1_cipher(EVP_CIPHER_CTX *ctx,unsigned char *out, + const unsigned char *in,size_t len) +{ + EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; + + if (ctx->flags&EVP_CIPH_FLAG_LENGTH_BITS) { + CRYPTO_cfb128_1_encrypt(in,out,len,&dat->ks, + ctx->iv,&ctx->num,ctx->encrypt,dat->block); + return 1; + } + + while (len>=MAXBITCHUNK) { + CRYPTO_cfb128_1_encrypt(in,out,MAXBITCHUNK*8,&dat->ks, + ctx->iv,&ctx->num,ctx->encrypt,dat->block); + len-=MAXBITCHUNK; + } + if (len) + CRYPTO_cfb128_1_encrypt(in,out,len*8,&dat->ks, + ctx->iv,&ctx->num,ctx->encrypt,dat->block); + + return 1; +} + +static int aes_ctr_cipher (EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) +{ + unsigned int num = ctx->num; + EVP_AES_KEY *dat = (EVP_AES_KEY *)ctx->cipher_data; + + if (dat->stream.ctr) + CRYPTO_ctr128_encrypt_ctr32(in,out,len,&dat->ks, + ctx->iv,ctx->buf,&num,dat->stream.ctr); + else + CRYPTO_ctr128_encrypt(in,out,len,&dat->ks, + ctx->iv,ctx->buf,&num,dat->block); + ctx->num = (size_t)num; + return 1; +} + +BLOCK_CIPHER_generic_pack(NID_aes,128,EVP_CIPH_FLAG_FIPS) +BLOCK_CIPHER_generic_pack(NID_aes,192,EVP_CIPH_FLAG_FIPS) +BLOCK_CIPHER_generic_pack(NID_aes,256,EVP_CIPH_FLAG_FIPS) + +static int aes_gcm_cleanup(EVP_CIPHER_CTX *c) + { + EVP_AES_GCM_CTX *gctx = c->cipher_data; + OPENSSL_cleanse(&gctx->gcm, sizeof(gctx->gcm)); + if (gctx->iv != c->iv) + OPENSSL_free(gctx->iv); + return 1; + } + +/* increment counter (64-bit int) by 1 */ +static void ctr64_inc(unsigned char *counter) { + int n=8; + unsigned char c; + + do { + --n; + c = counter[n]; + ++c; + counter[n] = c; + if (c) return; + } while (n); +} + +static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) + { + EVP_AES_GCM_CTX *gctx = c->cipher_data; + switch (type) + { + case EVP_CTRL_INIT: + gctx->key_set = 0; + gctx->iv_set = 0; + gctx->ivlen = c->cipher->iv_len; + gctx->iv = c->iv; + gctx->taglen = -1; + gctx->iv_gen = 0; + gctx->tls_aad_len = -1; + return 1; + + case EVP_CTRL_GCM_SET_IVLEN: + if (arg <= 0) + return 0; +#ifdef OPENSSL_FIPS + if (FIPS_module_mode() && !(c->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) + && arg < 12) + return 0; +#endif + /* Allocate memory for IV if needed */ + if ((arg > EVP_MAX_IV_LENGTH) && (arg > gctx->ivlen)) + { + if (gctx->iv != c->iv) + OPENSSL_free(gctx->iv); + gctx->iv = OPENSSL_malloc(arg); + if (!gctx->iv) + return 0; + } + gctx->ivlen = arg; + return 1; + + case EVP_CTRL_GCM_SET_TAG: + if (arg <= 0 || arg > 16 || c->encrypt) + return 0; + memcpy(c->buf, ptr, arg); + gctx->taglen = arg; + return 1; + + case EVP_CTRL_GCM_GET_TAG: + if (arg <= 0 || arg > 16 || !c->encrypt || gctx->taglen < 0) + return 0; + memcpy(ptr, c->buf, arg); + return 1; + + case EVP_CTRL_GCM_SET_IV_FIXED: + /* Special case: -1 length restores whole IV */ + if (arg == -1) + { + memcpy(gctx->iv, ptr, gctx->ivlen); + gctx->iv_gen = 1; + return 1; + } + /* Fixed field must be at least 4 bytes and invocation field + * at least 8. + */ + if ((arg < 4) || (gctx->ivlen - arg) < 8) + return 0; + if (arg) + memcpy(gctx->iv, ptr, arg); + if (c->encrypt && + RAND_bytes(gctx->iv + arg, gctx->ivlen - arg) <= 0) + return 0; + gctx->iv_gen = 1; + return 1; + + case EVP_CTRL_GCM_IV_GEN: + if (gctx->iv_gen == 0 || gctx->key_set == 0) + return 0; + CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); + if (arg <= 0 || arg > gctx->ivlen) + arg = gctx->ivlen; + memcpy(ptr, gctx->iv + gctx->ivlen - arg, arg); + /* Invocation field will be at least 8 bytes in size and + * so no need to check wrap around or increment more than + * last 8 bytes. + */ + ctr64_inc(gctx->iv + gctx->ivlen - 8); + gctx->iv_set = 1; + return 1; + + case EVP_CTRL_GCM_SET_IV_INV: + if (gctx->iv_gen == 0 || gctx->key_set == 0 || c->encrypt) + return 0; + memcpy(gctx->iv + gctx->ivlen - arg, ptr, arg); + CRYPTO_gcm128_setiv(&gctx->gcm, gctx->iv, gctx->ivlen); + gctx->iv_set = 1; + return 1; + + case EVP_CTRL_AEAD_TLS1_AAD: + /* Save the AAD for later use */ + if (arg != 13) + return 0; + memcpy(c->buf, ptr, arg); + gctx->tls_aad_len = arg; + { + unsigned int len=c->buf[arg-2]<<8|c->buf[arg-1]; + /* Correct length for explicit IV */ + len -= EVP_GCM_TLS_EXPLICIT_IV_LEN; + /* If decrypting correct for tag too */ + if (!c->encrypt) + len -= EVP_GCM_TLS_TAG_LEN; + c->buf[arg-2] = len>>8; + c->buf[arg-1] = len & 0xff; + } + /* Extra padding: tag appended to record */ + return EVP_GCM_TLS_TAG_LEN; + + default: + return -1; + + } + } + +static int aes_gcm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + EVP_AES_GCM_CTX *gctx = ctx->cipher_data; + if (!iv && !key) + return 1; + if (key) + { do { +#ifdef BSAES_CAPABLE + if (BSAES_CAPABLE) + { + AES_set_encrypt_key(key,ctx->key_len*8,&gctx->ks); + CRYPTO_gcm128_init(&gctx->gcm,&gctx->ks, + (block128_f)AES_encrypt); + gctx->ctr = (ctr128_f)bsaes_ctr32_encrypt_blocks; + break; + } + else +#endif +#ifdef VPAES_CAPABLE + if (VPAES_CAPABLE) + { + vpaes_set_encrypt_key(key,ctx->key_len*8,&gctx->ks); + CRYPTO_gcm128_init(&gctx->gcm,&gctx->ks, + (block128_f)vpaes_encrypt); + gctx->ctr = NULL; + break; + } +#endif + AES_set_encrypt_key(key, ctx->key_len * 8, &gctx->ks); + CRYPTO_gcm128_init(&gctx->gcm, &gctx->ks, (block128_f)AES_encrypt); +#ifdef AES_CTR_ASM + gctx->ctr = (ctr128_f)AES_ctr32_encrypt; +#else + gctx->ctr = NULL; +#endif + } while (0); + + /* If we have an iv can set it directly, otherwise use + * saved IV. + */ + if (iv == NULL && gctx->iv_set) + iv = gctx->iv; + if (iv) + { + CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); + gctx->iv_set = 1; + } + gctx->key_set = 1; + } + else + { + /* If key set use IV, otherwise copy */ + if (gctx->key_set) + CRYPTO_gcm128_setiv(&gctx->gcm, iv, gctx->ivlen); + else + memcpy(gctx->iv, iv, gctx->ivlen); + gctx->iv_set = 1; + gctx->iv_gen = 0; + } + return 1; + } + +/* Handle TLS GCM packet format. This consists of the last portion of the IV + * followed by the payload and finally the tag. On encrypt generate IV, + * encrypt payload and write the tag. On verify retrieve IV, decrypt payload + * and verify tag. + */ + +static int aes_gcm_tls_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) + { + EVP_AES_GCM_CTX *gctx = ctx->cipher_data; + int rv = -1; + /* Encrypt/decrypt must be performed in place */ + if (out != in || len < (EVP_GCM_TLS_EXPLICIT_IV_LEN+EVP_GCM_TLS_TAG_LEN)) + return -1; + /* Set IV from start of buffer or generate IV and write to start + * of buffer. + */ + if (EVP_CIPHER_CTX_ctrl(ctx, ctx->encrypt ? + EVP_CTRL_GCM_IV_GEN : EVP_CTRL_GCM_SET_IV_INV, + EVP_GCM_TLS_EXPLICIT_IV_LEN, out) <= 0) + goto err; + /* Use saved AAD */ + if (CRYPTO_gcm128_aad(&gctx->gcm, ctx->buf, gctx->tls_aad_len)) + goto err; + /* Fix buffer and length to point to payload */ + in += EVP_GCM_TLS_EXPLICIT_IV_LEN; + out += EVP_GCM_TLS_EXPLICIT_IV_LEN; + len -= EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; + if (ctx->encrypt) + { + /* Encrypt payload */ + if (gctx->ctr) + { + if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, + in, out, len, + gctx->ctr)) + goto err; + } + else { + if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) + goto err; + } + out += len; + /* Finally write tag */ + CRYPTO_gcm128_tag(&gctx->gcm, out, EVP_GCM_TLS_TAG_LEN); + rv = len + EVP_GCM_TLS_EXPLICIT_IV_LEN + EVP_GCM_TLS_TAG_LEN; + } + else + { + /* Decrypt */ + if (gctx->ctr) + { + if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, + in, out, len, + gctx->ctr)) + goto err; + } + else { + if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) + goto err; + } + /* Retrieve tag */ + CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, + EVP_GCM_TLS_TAG_LEN); + /* If tag mismatch wipe buffer */ + if (memcmp(ctx->buf, in + len, EVP_GCM_TLS_TAG_LEN)) + { + OPENSSL_cleanse(out, len); + goto err; + } + rv = len; + } + + err: + gctx->iv_set = 0; + gctx->tls_aad_len = -1; + return rv; + } + +static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) + { + EVP_AES_GCM_CTX *gctx = ctx->cipher_data; + /* If not set up, return error */ + if (!gctx->key_set) + return -1; + + if (gctx->tls_aad_len >= 0) + return aes_gcm_tls_cipher(ctx, out, in, len); + + if (!gctx->iv_set) + return -1; + if (!ctx->encrypt && gctx->taglen < 0) + return -1; + if (in) + { + if (out == NULL) + { + if (CRYPTO_gcm128_aad(&gctx->gcm, in, len)) + return -1; + } + else if (ctx->encrypt) + { + if (gctx->ctr) + { + if (CRYPTO_gcm128_encrypt_ctr32(&gctx->gcm, + in, out, len, + gctx->ctr)) + return -1; + } + else { + if (CRYPTO_gcm128_encrypt(&gctx->gcm, in, out, len)) + return -1; + } + } + else + { + if (gctx->ctr) + { + if (CRYPTO_gcm128_decrypt_ctr32(&gctx->gcm, + in, out, len, + gctx->ctr)) + return -1; + } + else { + if (CRYPTO_gcm128_decrypt(&gctx->gcm, in, out, len)) + return -1; + } + } + return len; + } + else + { + if (!ctx->encrypt) + { + if (CRYPTO_gcm128_finish(&gctx->gcm, + ctx->buf, gctx->taglen) != 0) + return -1; + gctx->iv_set = 0; + return 0; + } + CRYPTO_gcm128_tag(&gctx->gcm, ctx->buf, 16); + gctx->taglen = 16; + /* Don't reuse the IV */ + gctx->iv_set = 0; + return 0; + } + + } + +#define CUSTOM_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 \ + | EVP_CIPH_CUSTOM_IV | EVP_CIPH_FLAG_CUSTOM_CIPHER \ + | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT) + +BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM, + EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) +BLOCK_CIPHER_custom(NID_aes,192,1,12,gcm,GCM, + EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) +BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM, + EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) + +static int aes_xts_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) + { + EVP_AES_XTS_CTX *xctx = c->cipher_data; + if (type != EVP_CTRL_INIT) + return -1; + /* key1 and key2 are used as an indicator both key and IV are set */ + xctx->xts.key1 = NULL; + xctx->xts.key2 = NULL; + return 1; + } + +static int aes_xts_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + EVP_AES_XTS_CTX *xctx = ctx->cipher_data; + if (!iv && !key) + return 1; + + if (key) do + { +#ifdef AES_XTS_ASM + xctx->stream = enc ? AES_xts_encrypt : AES_xts_decrypt; +#else + xctx->stream = NULL; +#endif + /* key_len is two AES keys */ +#ifdef BSAES_CAPABLE + if (BSAES_CAPABLE) + xctx->stream = enc ? bsaes_xts_encrypt : bsaes_xts_decrypt; + else +#endif +#ifdef VPAES_CAPABLE + if (VPAES_CAPABLE) + { + if (enc) + { + vpaes_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); + xctx->xts.block1 = (block128_f)vpaes_encrypt; + } + else + { + vpaes_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); + xctx->xts.block1 = (block128_f)vpaes_decrypt; + } + + vpaes_set_encrypt_key(key + ctx->key_len/2, + ctx->key_len * 4, &xctx->ks2); + xctx->xts.block2 = (block128_f)vpaes_encrypt; + + xctx->xts.key1 = &xctx->ks1; + break; + } +#endif + if (enc) + { + AES_set_encrypt_key(key, ctx->key_len * 4, &xctx->ks1); + xctx->xts.block1 = (block128_f)AES_encrypt; + } + else + { + AES_set_decrypt_key(key, ctx->key_len * 4, &xctx->ks1); + xctx->xts.block1 = (block128_f)AES_decrypt; + } + + AES_set_encrypt_key(key + ctx->key_len/2, + ctx->key_len * 4, &xctx->ks2); + xctx->xts.block2 = (block128_f)AES_encrypt; + + xctx->xts.key1 = &xctx->ks1; + } while (0); + + if (iv) + { + xctx->xts.key2 = &xctx->ks2; + memcpy(ctx->iv, iv, 16); + } + + return 1; + } + +static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) + { + EVP_AES_XTS_CTX *xctx = ctx->cipher_data; + if (!xctx->xts.key1 || !xctx->xts.key2) + return 0; + if (!out || !in || len<AES_BLOCK_SIZE) + return 0; +#ifdef OPENSSL_FIPS + /* Requirement of SP800-38E */ + if (FIPS_module_mode() && !(ctx->flags & EVP_CIPH_FLAG_NON_FIPS_ALLOW) && + (len > (1UL<<20)*16)) + { + EVPerr(EVP_F_AES_XTS_CIPHER, EVP_R_TOO_LARGE); + return 0; + } +#endif + if (xctx->stream) + (*xctx->stream)(in, out, len, + xctx->xts.key1, xctx->xts.key2, ctx->iv); + else if (CRYPTO_xts128_encrypt(&xctx->xts, ctx->iv, in, out, len, + ctx->encrypt)) + return 0; + return 1; + } + +#define aes_xts_cleanup NULL + +#define XTS_FLAGS (EVP_CIPH_FLAG_DEFAULT_ASN1 | EVP_CIPH_CUSTOM_IV \ + | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT) + +BLOCK_CIPHER_custom(NID_aes,128,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|XTS_FLAGS) +BLOCK_CIPHER_custom(NID_aes,256,1,16,xts,XTS,EVP_CIPH_FLAG_FIPS|XTS_FLAGS) + +static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) + { + EVP_AES_CCM_CTX *cctx = c->cipher_data; + switch (type) + { + case EVP_CTRL_INIT: + cctx->key_set = 0; + cctx->iv_set = 0; + cctx->L = 8; + cctx->M = 12; + cctx->tag_set = 0; + cctx->len_set = 0; + return 1; + + case EVP_CTRL_CCM_SET_IVLEN: + arg = 15 - arg; + case EVP_CTRL_CCM_SET_L: + if (arg < 2 || arg > 8) + return 0; + cctx->L = arg; + return 1; + + case EVP_CTRL_CCM_SET_TAG: + if ((arg & 1) || arg < 4 || arg > 16) + return 0; + if ((c->encrypt && ptr) || (!c->encrypt && !ptr)) + return 0; + if (ptr) + { + cctx->tag_set = 1; + memcpy(c->buf, ptr, arg); + } + cctx->M = arg; + return 1; + + case EVP_CTRL_CCM_GET_TAG: + if (!c->encrypt || !cctx->tag_set) + return 0; + if(!CRYPTO_ccm128_tag(&cctx->ccm, ptr, (size_t)arg)) + return 0; + cctx->tag_set = 0; + cctx->iv_set = 0; + cctx->len_set = 0; + return 1; + + default: + return -1; + + } + } + +static int aes_ccm_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, + const unsigned char *iv, int enc) + { + EVP_AES_CCM_CTX *cctx = ctx->cipher_data; + if (!iv && !key) + return 1; + if (key) do + { +#ifdef VPAES_CAPABLE + if (VPAES_CAPABLE) + { + vpaes_set_encrypt_key(key, ctx->key_len*8, &cctx->ks); + CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, + &cctx->ks, (block128_f)vpaes_encrypt); + cctx->key_set = 1; + break; + } +#endif + AES_set_encrypt_key(key, ctx->key_len * 8, &cctx->ks); + CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L, + &cctx->ks, (block128_f)AES_encrypt); + cctx->str = NULL; + cctx->key_set = 1; + } while (0); + if (iv) + { + memcpy(ctx->iv, iv, 15 - cctx->L); + cctx->iv_set = 1; + } + return 1; + } + +static int aes_ccm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) + { + EVP_AES_CCM_CTX *cctx = ctx->cipher_data; + CCM128_CONTEXT *ccm = &cctx->ccm; + /* If not set up, return error */ + if (!cctx->iv_set && !cctx->key_set) + return -1; + if (!ctx->encrypt && !cctx->tag_set) + return -1; + if (!out) + { + if (!in) + { + if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L,len)) + return -1; + cctx->len_set = 1; + return len; + } + /* If have AAD need message length */ + if (!cctx->len_set && len) + return -1; + CRYPTO_ccm128_aad(ccm, in, len); + return len; + } + /* EVP_*Final() doesn't return any data */ + if (!in) + return 0; + /* If not set length yet do it */ + if (!cctx->len_set) + { + if (CRYPTO_ccm128_setiv(ccm, ctx->iv, 15 - cctx->L, len)) + return -1; + cctx->len_set = 1; + } + if (ctx->encrypt) + { + if (cctx->str ? CRYPTO_ccm128_encrypt_ccm64(ccm, in, out, len, + cctx->str) : + CRYPTO_ccm128_encrypt(ccm, in, out, len)) + return -1; + cctx->tag_set = 1; + return len; + } + else + { + int rv = -1; + if (cctx->str ? !CRYPTO_ccm128_decrypt_ccm64(ccm, in, out, len, + cctx->str) : + !CRYPTO_ccm128_decrypt(ccm, in, out, len)) + { + unsigned char tag[16]; + if (CRYPTO_ccm128_tag(ccm, tag, cctx->M)) + { + if (!memcmp(tag, ctx->buf, cctx->M)) + rv = len; + } + } + if (rv == -1) + OPENSSL_cleanse(out, len); + cctx->iv_set = 0; + cctx->tag_set = 0; + cctx->len_set = 0; + return rv; + } + + } + +#define aes_ccm_cleanup NULL + +BLOCK_CIPHER_custom(NID_aes,128,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS) +BLOCK_CIPHER_custom(NID_aes,192,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS) +BLOCK_CIPHER_custom(NID_aes,256,1,12,ccm,CCM,EVP_CIPH_FLAG_FIPS|CUSTOM_FLAGS) + +#endif #endif |