diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/evp/bio_md.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/evp/bio_md.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/evp/bio_md.c b/openssl-1.1.0h/crypto/evp/bio_md.c new file mode 100644 index 0000000..2f0f283 --- /dev/null +++ b/openssl-1.1.0h/crypto/evp/bio_md.c @@ -0,0 +1,232 @@ +/* + * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <stdio.h> +#include <errno.h> +#include "internal/cryptlib.h" +#include <openssl/buffer.h> +#include <openssl/evp.h> +#include "internal/evp_int.h" +#include "evp_locl.h" +#include "internal/bio.h" + +/* + * BIO_put and BIO_get both add to the digest, BIO_gets returns the digest + */ + +static int md_write(BIO *h, char const *buf, int num); +static int md_read(BIO *h, char *buf, int size); +/* + * static int md_puts(BIO *h, const char *str); + */ +static int md_gets(BIO *h, char *str, int size); +static long md_ctrl(BIO *h, int cmd, long arg1, void *arg2); +static int md_new(BIO *h); +static int md_free(BIO *data); +static long md_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp); + +static const BIO_METHOD methods_md = { + BIO_TYPE_MD, + "message digest", + md_write, + md_read, + NULL, /* md_puts, */ + md_gets, + md_ctrl, + md_new, + md_free, + md_callback_ctrl, +}; + +const BIO_METHOD *BIO_f_md(void) +{ + return (&methods_md); +} + +static int md_new(BIO *bi) +{ + EVP_MD_CTX *ctx; + + ctx = EVP_MD_CTX_new(); + if (ctx == NULL) + return (0); + + BIO_set_init(bi, 1); + BIO_set_data(bi, ctx); + + return 1; +} + +static int md_free(BIO *a) +{ + if (a == NULL) + return (0); + EVP_MD_CTX_free(BIO_get_data(a)); + BIO_set_data(a, NULL); + BIO_set_init(a, 0); + + return 1; +} + +static int md_read(BIO *b, char *out, int outl) +{ + int ret = 0; + EVP_MD_CTX *ctx; + BIO *next; + + if (out == NULL) + return (0); + + ctx = BIO_get_data(b); + next = BIO_next(b); + + if ((ctx == NULL) || (next == NULL)) + return (0); + + ret = BIO_read(next, out, outl); + if (BIO_get_init(b)) { + if (ret > 0) { + if (EVP_DigestUpdate(ctx, (unsigned char *)out, + (unsigned int)ret) <= 0) + return (-1); + } + } + BIO_clear_retry_flags(b); + BIO_copy_next_retry(b); + return (ret); +} + +static int md_write(BIO *b, const char *in, int inl) +{ + int ret = 0; + EVP_MD_CTX *ctx; + BIO *next; + + if ((in == NULL) || (inl <= 0)) + return 0; + + ctx = BIO_get_data(b); + next = BIO_next(b); + if ((ctx != NULL) && (next != NULL)) + ret = BIO_write(next, in, inl); + + if (BIO_get_init(b)) { + if (ret > 0) { + if (!EVP_DigestUpdate(ctx, (const unsigned char *)in, + (unsigned int)ret)) { + BIO_clear_retry_flags(b); + return 0; + } + } + } + if (next != NULL) { + BIO_clear_retry_flags(b); + BIO_copy_next_retry(b); + } + return ret; +} + +static long md_ctrl(BIO *b, int cmd, long num, void *ptr) +{ + EVP_MD_CTX *ctx, *dctx, **pctx; + const EVP_MD **ppmd; + EVP_MD *md; + long ret = 1; + BIO *dbio, *next; + + + ctx = BIO_get_data(b); + next = BIO_next(b); + + switch (cmd) { + case BIO_CTRL_RESET: + if (BIO_get_init(b)) + ret = EVP_DigestInit_ex(ctx, ctx->digest, NULL); + else + ret = 0; + if (ret > 0) + ret = BIO_ctrl(next, cmd, num, ptr); + break; + case BIO_C_GET_MD: + if (BIO_get_init(b)) { + ppmd = ptr; + *ppmd = ctx->digest; + } else + ret = 0; + break; + case BIO_C_GET_MD_CTX: + pctx = ptr; + *pctx = ctx; + BIO_set_init(b, 1); + break; + case BIO_C_SET_MD_CTX: + if (BIO_get_init(b)) + BIO_set_data(b, ptr); + else + ret = 0; + break; + case BIO_C_DO_STATE_MACHINE: + BIO_clear_retry_flags(b); + ret = BIO_ctrl(next, cmd, num, ptr); + BIO_copy_next_retry(b); + break; + + case BIO_C_SET_MD: + md = ptr; + ret = EVP_DigestInit_ex(ctx, md, NULL); + if (ret > 0) + BIO_set_init(b, 1); + break; + case BIO_CTRL_DUP: + dbio = ptr; + dctx = BIO_get_data(dbio); + if (!EVP_MD_CTX_copy_ex(dctx, ctx)) + return 0; + BIO_set_init(b, 1); + break; + default: + ret = BIO_ctrl(next, cmd, num, ptr); + break; + } + return (ret); +} + +static long md_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp) +{ + long ret = 1; + BIO *next; + + next = BIO_next(b); + + if (next == NULL) + return 0; + + switch (cmd) { + default: + ret = BIO_callback_ctrl(next, cmd, fp); + break; + } + return (ret); +} + +static int md_gets(BIO *bp, char *buf, int size) +{ + EVP_MD_CTX *ctx; + unsigned int ret; + + ctx = BIO_get_data(bp); + + if (size < ctx->digest->md_size) + return 0; + + if (EVP_DigestFinal_ex(ctx, (unsigned char *)buf, &ret) <= 0) + return -1; + + return ((int)ret); +} |