diff options
Diffstat (limited to 'crypto/evp/e_des.c')
| -rw-r--r-- | crypto/evp/e_des.c | 82 |
1 files changed, 65 insertions, 17 deletions
diff --git a/crypto/evp/e_des.c b/crypto/evp/e_des.c index 856323648c..ca009f2c52 100644 --- a/crypto/evp/e_des.c +++ b/crypto/evp/e_des.c @@ -72,7 +72,7 @@ static int des_ctrl(EVP_CIPHER_CTX *c, int type, int arg, void *ptr); /* Because of various casts and different names can't use IMPLEMENT_BLOCK_CIPHER */ static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, unsigned int inl) + const unsigned char *in, size_t inl) { BLOCK_CIPHER_ecb_loop() DES_ecb_encrypt((DES_cblock *)(in + i), (DES_cblock *)(out + i), ctx->cipher_data, ctx->encrypt); @@ -80,24 +80,52 @@ static int des_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, } static int des_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, unsigned int inl) + const unsigned char *in, size_t inl) { - DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, (DES_cblock *)ctx->iv, &ctx->num); + while(inl>=EVP_MAXCHUNK) + { + DES_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, + (DES_cblock *)ctx->iv, &ctx->num); + inl-=EVP_MAXCHUNK; + in +=EVP_MAXCHUNK; + out+=EVP_MAXCHUNK; + } + if (inl) + DES_ofb64_encrypt(in, out, (long)inl, ctx->cipher_data, + (DES_cblock *)ctx->iv, &ctx->num); return 1; } static int des_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, unsigned int inl) + const unsigned char *in, size_t inl) { - DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data, - (DES_cblock *)ctx->iv, ctx->encrypt); + while(inl>=EVP_MAXCHUNK) + { + DES_ncbc_encrypt(in, out, (long)EVP_MAXCHUNK, ctx->cipher_data, + (DES_cblock *)ctx->iv, ctx->encrypt); + inl-=EVP_MAXCHUNK; + in +=EVP_MAXCHUNK; + out+=EVP_MAXCHUNK; + } + if (inl) + DES_ncbc_encrypt(in, out, (long)inl, ctx->cipher_data, + (DES_cblock *)ctx->iv, ctx->encrypt); return 1; } static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, unsigned int inl) + const unsigned char *in, size_t inl) { - DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data, + while(inl>=EVP_MAXCHUNK) + { + DES_cfb64_encrypt(in,out, (long)EVP_MAXCHUNK, ctx->cipher_data, + (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); + inl-=EVP_MAXCHUNK; + in +=EVP_MAXCHUNK; + out+=EVP_MAXCHUNK; + } + if (inl) + DES_cfb64_encrypt(in, out, (long)inl, ctx->cipher_data, (DES_cblock *)ctx->iv, &ctx->num, ctx->encrypt); return 1; } @@ -105,26 +133,46 @@ static int des_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, /* Although we have a CFB-r implementation for DES, it doesn't pack the right way, so wrap it here */ static int des_cfb1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, unsigned int inl) + const unsigned char *in, size_t inl) { - unsigned int n; + size_t n,chunk=EVP_MAXCHUNK/8; unsigned char c[1],d[1]; - for(n=0 ; n < inl ; ++n) + if (inl<chunk) chunk=inl; + + while (inl && inl>=chunk) { - c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0; - DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv, + for(n=0 ; n < chunk*8; ++n) + { + c[0]=(in[n/8]&(1 << (7-n%8))) ? 0x80 : 0; + DES_cfb_encrypt(c,d,1,1,ctx->cipher_data,(DES_cblock *)ctx->iv, ctx->encrypt); - out[n/8]=(out[n/8]&~(0x80 >> (n%8)))|((d[0]&0x80) >> (n%8)); + out[n/8]=(out[n/8]&~(0x80 >> (unsigned int)(n%8))) | + ((d[0]&0x80) >> (unsigned int)(n%8)); + } + inl-=chunk; + in +=chunk; + out+=chunk; + if (inl<chunk) chunk=inl; } + return 1; } static int des_cfb8_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, - const unsigned char *in, unsigned int inl) + const unsigned char *in, size_t inl) { - DES_cfb_encrypt(in,out,8,inl,ctx->cipher_data,(DES_cblock *)ctx->iv, - ctx->encrypt); + while (inl>=EVP_MAXCHUNK) + { + DES_cfb_encrypt(in,out,8,(long)EVP_MAXCHUNK,ctx->cipher_data, + (DES_cblock *)ctx->iv,ctx->encrypt); + inl-=EVP_MAXCHUNK; + in +=EVP_MAXCHUNK; + out+=EVP_MAXCHUNK; + } + if (inl) + DES_cfb_encrypt(in,out,8,(long)inl,ctx->cipher_data, + (DES_cblock *)ctx->iv,ctx->encrypt); return 1; } |