diff options
Diffstat (limited to 'main/openssl/crypto/evp')
| -rw-r--r-- | main/openssl/crypto/evp/e_aes.c | 63 | ||||
| -rw-r--r-- | main/openssl/crypto/evp/evp_enc.c | 56 | ||||
| -rw-r--r-- | main/openssl/crypto/evp/evp_pbe.c | 2 |
3 files changed, 91 insertions, 30 deletions
diff --git a/main/openssl/crypto/evp/e_aes.c b/main/openssl/crypto/evp/e_aes.c index ad0f7a4a..85d5aaa4 100644 --- a/main/openssl/crypto/evp/e_aes.c +++ b/main/openssl/crypto/evp/e_aes.c @@ -166,7 +166,7 @@ extern unsigned int OPENSSL_ia32cap_P[]; #define VPAES_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(41-32))) #endif #ifdef BSAES_ASM -#define BSAES_CAPABLE VPAES_CAPABLE +#define BSAES_CAPABLE (OPENSSL_ia32cap_P[1]&(1<<(41-32))) #endif /* * AES-NI section @@ -873,6 +873,28 @@ static int aes_gcm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) /* Extra padding: tag appended to record */ return EVP_GCM_TLS_TAG_LEN; + case EVP_CTRL_COPY: + { + EVP_CIPHER_CTX *out = ptr; + EVP_AES_GCM_CTX *gctx_out = out->cipher_data; + if (gctx->gcm.key) + { + if (gctx->gcm.key != &gctx->ks) + return 0; + gctx_out->gcm.key = &gctx_out->ks; + } + if (gctx->iv == c->iv) + gctx_out->iv = out->iv; + else + { + gctx_out->iv = OPENSSL_malloc(gctx->ivlen); + if (!gctx_out->iv) + return 0; + memcpy(gctx_out->iv, gctx->iv, gctx->ivlen); + } + return 1; + } + default: return -1; @@ -1112,7 +1134,8 @@ static int aes_gcm_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, #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) + | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ + | EVP_CIPH_CUSTOM_COPY) BLOCK_CIPHER_custom(NID_aes,128,1,12,gcm,GCM, EVP_CIPH_FLAG_FIPS|EVP_CIPH_FLAG_AEAD_CIPHER|CUSTOM_FLAGS) @@ -1124,7 +1147,25 @@ BLOCK_CIPHER_custom(NID_aes,256,1,12,gcm,GCM, 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) + if (type == EVP_CTRL_COPY) + { + EVP_CIPHER_CTX *out = ptr; + EVP_AES_XTS_CTX *xctx_out = out->cipher_data; + if (xctx->xts.key1) + { + if (xctx->xts.key1 != &xctx->ks1) + return 0; + xctx_out->xts.key1 = &xctx_out->ks1; + } + if (xctx->xts.key2) + { + if (xctx->xts.key2 != &xctx->ks2) + return 0; + xctx_out->xts.key2 = &xctx_out->ks2; + } + return 1; + } + else 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; @@ -1256,7 +1297,8 @@ static int aes_xts_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, #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) + | EVP_CIPH_ALWAYS_CALL_INIT | EVP_CIPH_CTRL_INIT \ + | EVP_CIPH_CUSTOM_COPY) 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) @@ -1306,6 +1348,19 @@ static int aes_ccm_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr) cctx->len_set = 0; return 1; + case EVP_CTRL_COPY: + { + EVP_CIPHER_CTX *out = ptr; + EVP_AES_CCM_CTX *cctx_out = out->cipher_data; + if (cctx->ccm.key) + { + if (cctx->ccm.key != &cctx->ks) + return 0; + cctx_out->ccm.key = &cctx_out->ks; + } + return 1; + } + default: return -1; diff --git a/main/openssl/crypto/evp/evp_enc.c b/main/openssl/crypto/evp/evp_enc.c index 0c54f05e..7b1842a5 100644 --- a/main/openssl/crypto/evp/evp_enc.c +++ b/main/openssl/crypto/evp/evp_enc.c @@ -67,6 +67,7 @@ #ifdef OPENSSL_FIPS #include <openssl/fips.h> #endif +#include "constant_time_locl.h" #include "evp_locl.h" #ifdef OPENSSL_FIPS @@ -500,21 +501,21 @@ int EVP_DecryptFinal(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) { - int i,n; - unsigned int b; + unsigned int i, b; + unsigned char pad, padding_good; *outl=0; if (ctx->cipher->flags & EVP_CIPH_FLAG_CUSTOM_CIPHER) { - i = M_do_cipher(ctx, out, NULL, 0); - if (i < 0) + int ret = M_do_cipher(ctx, out, NULL, 0); + if (ret < 0) return 0; else - *outl = i; + *outl = ret; return 1; } - b=ctx->cipher->block_size; + b=(unsigned int)(ctx->cipher->block_size); if (ctx->flags & EVP_CIPH_NO_PADDING) { if(ctx->buf_len) @@ -533,28 +534,34 @@ int EVP_DecryptFinal_ex(EVP_CIPHER_CTX *ctx, unsigned char *out, int *outl) return(0); } OPENSSL_assert(b <= sizeof ctx->final); - n=ctx->final[b-1]; - if (n == 0 || n > (int)b) - { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_BAD_DECRYPT); - return(0); - } - for (i=0; i<n; i++) + pad=ctx->final[b-1]; + + padding_good = (unsigned char)(~constant_time_is_zero_8(pad)); + padding_good &= constant_time_ge_8(b, pad); + + for (i = 1; i < b; ++i) { - if (ctx->final[--b] != n) - { - EVPerr(EVP_F_EVP_DECRYPTFINAL_EX,EVP_R_BAD_DECRYPT); - return(0); - } + unsigned char is_pad_index = constant_time_lt_8(i, pad); + unsigned char pad_byte_good = constant_time_eq_8(ctx->final[b-i-1], pad); + padding_good &= constant_time_select_8(is_pad_index, pad_byte_good, 0xff); } - n=ctx->cipher->block_size-n; - for (i=0; i<n; i++) - out[i]=ctx->final[i]; - *outl=n; + + /* + * At least 1 byte is always padding, so we always write b - 1 + * bytes to avoid a timing leak. The caller is required to have |b| + * bytes space in |out| by the API contract. + */ + for (i = 0; i < b - 1; ++i) + out[i] = ctx->final[i] & padding_good; + /* Safe cast: for a good padding, EVP_MAX_IV_LENGTH >= b >= pad */ + *outl = padding_good & ((unsigned char)(b - pad)); + return padding_good & 1; } else - *outl=0; - return(1); + { + *outl = 0; + return 1; + } } void EVP_CIPHER_CTX_free(EVP_CIPHER_CTX *ctx) @@ -678,4 +685,3 @@ int EVP_CIPHER_CTX_copy(EVP_CIPHER_CTX *out, const EVP_CIPHER_CTX *in) return in->cipher->ctrl((EVP_CIPHER_CTX *)in, EVP_CTRL_COPY, 0, out); return 1; } - diff --git a/main/openssl/crypto/evp/evp_pbe.c b/main/openssl/crypto/evp/evp_pbe.c index f8c32d82..59696959 100644 --- a/main/openssl/crypto/evp/evp_pbe.c +++ b/main/openssl/crypto/evp/evp_pbe.c @@ -259,7 +259,7 @@ int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const EVP_MD *md, { int cipher_nid, md_nid; if (cipher) - cipher_nid = EVP_CIPHER_type(cipher); + cipher_nid = EVP_CIPHER_nid(cipher); else cipher_nid = -1; if (md) |